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1. Multi-decadal improvements in the ecological quality of European rivers are not consistently reflected in biodiversity metrics

Author

Sinclair, J, Welti, E, Altermatt, F, Alvarez-Cabria, M, Aroviita, J, Baker, N, Baresova, L, Barquin, J, Bonacina, L, Bonada, N, Canedo-Arguelles, M, Csabai, Z, de Eyto, E, Dohet, A, Dorflinger, G, Eriksen, T, Evtimova, V, Feio, M, Ferreol, M, Floury, M, Forio, M, Fornaroli, R, Goethals, P, Heino, J, Hering, D, Huttunen, K, Jahnig, S, Johnson, R, Kuglerova, L, Kupilas, B, L'Hoste, L, Larranaga, A, Leitner, P, Lorenz, A, Mckie, B, Muotka, T, Osadcaja, D, Paavola, R, Palinauskas, V, Paril, P, Pilotto, F, Polasek, M, Rasmussen, J, Schafer, R, Schmidt-Kloiber, A, Scotti, A, Skuja, A, Straka, M, Stubbington, R, Timm, H, Tyufekchieva, V, Tziortzis, I, Vannevel, R, Varbiro, G, Velle, G, Verdonschot, R, Vray, S, Haase, P, Sinclair J. S., Welti E. A. R., Altermatt F., Alvarez-Cabria M., Aroviita J., Baker N. J., Baresova L., Barquin J., Bonacina L., Bonada N., Canedo-Arguelles M., Csabai Z., de Eyto E., Dohet A., Dorflinger G., Eriksen T. E., Evtimova V., Feio M. J., Ferreol M., Floury M., Forio M. A. E., Fornaroli R., Goethals P. L. M., Heino J., Hering D., Huttunen K. -L., Jahnig S. C., Johnson R. K., Kuglerova L., Kupilas B., L'Hoste L., Larranaga A., Leitner P., Lorenz A. W., McKie B. G., Muotka T., Osadcaja D., Paavola R., Palinauskas V., Paril P., Pilotto F., Polasek M., Rasmussen J. J., Schafer R. B., Schmidt-Kloiber A., Scotti A., Skuja A., Straka M., Stubbington R., Timm H., Tyufekchieva V., Tziortzis I., Vannevel R., Varbiro G., Velle G., Verdonschot R. C. M., Vray S., Haase P., Sinclair, J, Welti, E, Altermatt, F, Alvarez-Cabria, M, Aroviita, J, Baker, N, Baresova, L, Barquin, J, Bonacina, L, Bonada, N, Canedo-Arguelles, M, Csabai, Z, de Eyto, E, Dohet, A, Dorflinger, G, Eriksen, T, Evtimova, V, Feio, M, Ferreol, M, Floury, M, Forio, M, Fornaroli, R, Goethals, P, Heino, J, Hering, D, Huttunen, K, Jahnig, S, Johnson, R, Kuglerova, L, Kupilas, B, L'Hoste, L, Larranaga, A, Leitner, P, Lorenz, A, Mckie, B, Muotka, T, Osadcaja, D, Paavola, R, Palinauskas, V, Paril, P, Pilotto, F, Polasek, M, Rasmussen, J, Schafer, R, Schmidt-Kloiber, A, Scotti, A, Skuja, A, Straka, M, Stubbington, R, Timm, H, Tyufekchieva, V, Tziortzis, I, Vannevel, R, Varbiro, G, Velle, G, Verdonschot, R, Vray, S, Haase, P, Sinclair J. S., Welti E. A. R., Altermatt F., Alvarez-Cabria M., Aroviita J., Baker N. J., Baresova L., Barquin J., Bonacina L., Bonada N., Canedo-Arguelles M., Csabai Z., de Eyto E., Dohet A., Dorflinger G., Eriksen T. E., Evtimova V., Feio M. J., Ferreol M., Floury M., Forio M. A. E., Fornaroli R., Goethals P. L. M., Heino J., Hering D., Huttunen K. -L., Jahnig S. C., Johnson R. K., Kuglerova L., Kupilas B., L'Hoste L., Larranaga A., Leitner P., Lorenz A. W., McKie B. G., Muotka T., Osadcaja D., Paavola R., Palinauskas V., Paril P., Pilotto F., Polasek M., Rasmussen J. J., Schafer R. B., Schmidt-Kloiber A., Scotti A., Skuja A., Straka M., Stubbington R., Timm H., Tyufekchieva V., Tziortzis I., Vannevel R., Varbiro G., Velle G., Verdonschot R. C. M., Vray S., and Haase P.

Abstract

Humans impact terrestrial, marine and freshwater ecosystems, yet many broad-scale studies have found no systematic, negative biodiversity changes (for example, decreasing abundance or taxon richness). Here we show that mixed biodiversity responses may arise because community metrics show variable responses to anthropogenic impacts across broad spatial scales. We first quantified temporal trends in anthropogenic impacts for 1,365 riverine invertebrate communities from 23 European countries, based on similarity to least-impacted reference communities. Reference comparisons provide necessary, but often missing, baselines for evaluating whether communities are negatively impacted or have improved (less or more similar, respectively). We then determined whether changing impacts were consistently reflected in metrics of community abundance, taxon richness, evenness and composition. Invertebrate communities improved, that is, became more similar to reference conditions, from 1992 until the 2010s, after which improvements plateaued. Improvements were generally reflected by higher taxon richness, providing evidence that certain community metrics can broadly indicate anthropogenic impacts. However, richness responses were highly variable among sites, and we found no consistent responses in community abundance, evenness or composition. These findings suggest that, without sufficient data and careful metric selection, many common community metrics cannot reliably reflect anthropogenic impacts, helping explain the prevalence of mixed biodiversity trends.

Published
2024

2. Time series of freshwater macroinvertebrate abundances and site characteristics of European streams and rivers

Author

Welti, E, Bowler, D, Sinclair, J, Altermatt, F, Alvarez-Cabria, M, Amatulli, G, Angeler, D, Archambaud, G, Arrate Jorrin, I, Aspin, T, Azpiroz, I, Baker, N, Banares, I, Barquin Ortiz, J, Bodin, C, Bonacina, L, Bonada, N, Bottarin, R, Canedo-Arguelles, M, Csabai, Z, Datry, T, de Eyto, E, Dohet, A, Domisch, S, Dorflinger, G, Drohan, E, Eikland, K, England, J, Eriksen, T, Evtimova, V, Feio, M, Ferreol, M, Floury, M, Forcellini, M, Forio, M, Fornaroli, R, Friberg, N, Fruget, J, Garcia Marquez, J, Georgieva, G, Goethals, P, Graca, M, House, A, Huttunen, K, Jensen, T, Johnson, R, Jones, J, Kiesel, J, Larranaga, A, Leitner, P, L'Hoste, L, Lizee, M, Lorenz, A, Maire, A, Manzanos Arnaiz, J, Mckie, B, Millan, A, Muotka, T, Murphy, J, Ozolins, D, Paavola, R, Paril, P, Penas Silva, F, Polasek, M, Rasmussen, J, Rubio, M, Sanchez Fernandez, D, Sandin, L, Schafer, R, Schmidt-Kloiber, A, Scotti, A, Shen, L, Skuja, A, Stoll, S, Straka, M, Stubbington, R, Timm, H, Tyufekchieva, V, Tziortzis, I, Uzunov, Y, van der Lee, G, Vannevel, R, Varadinova, E, Varbiro, G, Velle, G, Verdonschot, P, Verdonschot, R, Vidinova, Y, Wiberg-Larsen, P, Haase, P, Welti E. A. R., Bowler D. E., Sinclair J. S., Altermatt F., Alvarez-Cabria M., Amatulli G., Angeler D. G., Archambaud G., Arrate Jorrin I., Aspin T., Azpiroz I., Baker N. J., Banares I., Barquin Ortiz J., Bodin C. L., Bonacina L., Bonada N., Bottarin R., Canedo-Arguelles M., Csabai Z., Datry T., de Eyto E., Dohet A., Domisch S., Dorflinger G., Drohan E., Eikland K. A., England J., Eriksen T. E., Evtimova V., Feio M. J., Ferreol M., Floury M., Forcellini M., Forio M. A. E., Fornaroli R., Friberg N., Fruget J. -F., Garcia Marquez J. R., Georgieva G., Goethals P., Graca M. A. S., House A., Huttunen K. -L., Jensen T. C., Johnson R. K., Jones J. I., Kiesel J., Larranaga A., Leitner P., L'Hoste L., Lizee M. -H., Lorenz A. W., Maire A., Manzanos Arnaiz J. A., Mckie B., Millan A., Muotka T., Murphy J. F., Ozolins D., Paavola R., Paril P., Penas Silva F. J., Polasek M., Rasmussen J., Rubio M., Sanchez Fernandez D., Sandin L., Schafer R. B., Schmidt-Kloiber A., Scotti A., Shen L. Q., Skuja A., Stoll S., Straka M., Stubbington R., Timm H., Tyufekchieva V. G., Tziortzis I., Uzunov Y., van der Lee G. H., Vannevel R., Varadinova E., Varbiro G., Velle G., Verdonschot P. F. M., Verdonschot R. C. M., Vidinova Y., Wiberg-Larsen P., Haase P., Welti, E, Bowler, D, Sinclair, J, Altermatt, F, Alvarez-Cabria, M, Amatulli, G, Angeler, D, Archambaud, G, Arrate Jorrin, I, Aspin, T, Azpiroz, I, Baker, N, Banares, I, Barquin Ortiz, J, Bodin, C, Bonacina, L, Bonada, N, Bottarin, R, Canedo-Arguelles, M, Csabai, Z, Datry, T, de Eyto, E, Dohet, A, Domisch, S, Dorflinger, G, Drohan, E, Eikland, K, England, J, Eriksen, T, Evtimova, V, Feio, M, Ferreol, M, Floury, M, Forcellini, M, Forio, M, Fornaroli, R, Friberg, N, Fruget, J, Garcia Marquez, J, Georgieva, G, Goethals, P, Graca, M, House, A, Huttunen, K, Jensen, T, Johnson, R, Jones, J, Kiesel, J, Larranaga, A, Leitner, P, L'Hoste, L, Lizee, M, Lorenz, A, Maire, A, Manzanos Arnaiz, J, Mckie, B, Millan, A, Muotka, T, Murphy, J, Ozolins, D, Paavola, R, Paril, P, Penas Silva, F, Polasek, M, Rasmussen, J, Rubio, M, Sanchez Fernandez, D, Sandin, L, Schafer, R, Schmidt-Kloiber, A, Scotti, A, Shen, L, Skuja, A, Stoll, S, Straka, M, Stubbington, R, Timm, H, Tyufekchieva, V, Tziortzis, I, Uzunov, Y, van der Lee, G, Vannevel, R, Varadinova, E, Varbiro, G, Velle, G, Verdonschot, P, Verdonschot, R, Vidinova, Y, Wiberg-Larsen, P, Haase, P, Welti E. A. R., Bowler D. E., Sinclair J. S., Altermatt F., Alvarez-Cabria M., Amatulli G., Angeler D. G., Archambaud G., Arrate Jorrin I., Aspin T., Azpiroz I., Baker N. J., Banares I., Barquin Ortiz J., Bodin C. L., Bonacina L., Bonada N., Bottarin R., Canedo-Arguelles M., Csabai Z., Datry T., de Eyto E., Dohet A., Domisch S., Dorflinger G., Drohan E., Eikland K. A., England J., Eriksen T. E., Evtimova V., Feio M. J., Ferreol M., Floury M., Forcellini M., Forio M. A. E., Fornaroli R., Friberg N., Fruget J. -F., Garcia Marquez J. R., Georgieva G., Goethals P., Graca M. A. S., House A., Huttunen K. -L., Jensen T. C., Johnson R. K., Jones J. I., Kiesel J., Larranaga A., Leitner P., L'Hoste L., Lizee M. -H., Lorenz A. W., Maire A., Manzanos Arnaiz J. A., Mckie B., Millan A., Muotka T., Murphy J. F., Ozolins D., Paavola R., Paril P., Penas Silva F. J., Polasek M., Rasmussen J., Rubio M., Sanchez Fernandez D., Sandin L., Schafer R. B., Schmidt-Kloiber A., Scotti A., Shen L. Q., Skuja A., Stoll S., Straka M., Stubbington R., Timm H., Tyufekchieva V. G., Tziortzis I., Uzunov Y., van der Lee G. H., Vannevel R., Varadinova E., Varbiro G., Velle G., Verdonschot P. F. M., Verdonschot R. C. M., Vidinova Y., Wiberg-Larsen P., and Haase P.

Abstract

Freshwater macroinvertebrates are a diverse group and play key ecological roles, including accelerating nutrient cycling, filtering water, controlling primary producers, and providing food for predators. Their differences in tolerances and short generation times manifest in rapid community responses to change. Macroinvertebrate community composition is an indicator of water quality. In Europe, efforts to improve water quality following environmental legislation, primarily starting in the 1980s, may have driven a recovery of macroinvertebrate communities. Towards understanding temporal and spatial variation of these organisms, we compiled the TREAM dataset (Time seRies of European freshwAter Macroinvertebrates), consisting of macroinvertebrate community time series from 1,816 river and stream sites (mean length of 19.2 years and 14.9 sampling years) of 22 European countries sampled between 1968 and 2020. In total, the data include >93 million sampled individuals of 2,648 taxa from 959 genera and 212 families. These data can be used to test questions ranging from identifying drivers of the population dynamics of specific taxa to assessing the success of legislative and management restoration efforts.

Published
2024

3. The recovery of European freshwater biodiversity has come to a halt

Author

Haase, P, Bowler, D, Baker, N, Bonada, N, Domisch, S, Garcia Marquez, J, Heino, J, Hering, D, Jahnig, S, Schmidt-Kloiber, A, Stubbington, R, Altermatt, F, Alvarez-Cabria, M, Amatulli, G, Angeler, D, Archambaud-Suard, G, Jorrin, I, Aspin, T, Azpiroz, I, Banares, I, Ortiz, J, Bodin, C, Bonacina, L, Bottarin, R, Canedo-Arguelles, M, Csabai, Z, Datry, T, de Eyto, E, Dohet, A, Dorflinger, G, Drohan, E, Eikland, K, England, J, Eriksen, T, Evtimova, V, Feio, M, Ferreol, M, Floury, M, Forcellini, M, Forio, M, Fornaroli, R, Friberg, N, Fruget, J, Georgieva, G, Goethals, P, Graca, M, Graf, W, House, A, Huttunen, K, Jensen, T, Johnson, R, Jones, J, Kiesel, J, Kuglerova, L, Larranaga, A, Leitner, P, L'Hoste, L, Lizee, M, Lorenz, A, Maire, A, Arnaiz, J, Mckie, B, Millan, A, Monteith, D, Muotka, T, Murphy, J, Ozolins, D, Paavola, R, Paril, P, Penas, F, Pilotto, F, Polasek, M, Rasmussen, J, Rubio, M, Sanchez-Fernandez, D, Sandin, L, Schafer, R, Scotti, A, Shen, L, Skuja, A, Stoll, S, Straka, M, Timm, H, Tyufekchieva, V, Tziortzis, I, Uzunov, Y, van der Lee, G, Vannevel, R, Varadinova, E, Varbiro, G, Velle, G, Verdonschot, P, Verdonschot, R, Vidinova, Y, Wiberg-Larsen, P, Welti, E, Haase P., Bowler D. E., Baker N. J., Bonada N., Domisch S., Garcia Marquez J. R., Heino J., Hering D., Jahnig S. C., Schmidt-Kloiber A., Stubbington R., Altermatt F., Alvarez-Cabria M., Amatulli G., Angeler D. G., Archambaud-Suard G., Jorrin I. A., Aspin T., Azpiroz I., Banares I., Ortiz J. B., Bodin C. L., Bonacina L., Bottarin R., Canedo-Arguelles M., Csabai Z., Datry T., de Eyto E., Dohet A., Dorflinger G., Drohan E., Eikland K. A., England J., Eriksen T. E., Evtimova V., Feio M. J., Ferreol M., Floury M., Forcellini M., Forio M. A. E., Fornaroli R., Friberg N., Fruget J. -F., Georgieva G., Goethals P., Graca M. A. S., Graf W., House A., Huttunen K. -L., Jensen T. C., Johnson R. K., Jones J. I., Kiesel J., Kuglerova L., Larranaga A., Leitner P., L'Hoste L., Lizee M. -H., Lorenz A. W., Maire A., Arnaiz J. A. M., McKie B. G., Millan A., Monteith D., Muotka T., Murphy J. F., Ozolins D., Paavola R., Paril P., Penas F. J., Pilotto F., Polasek M., Rasmussen J. J., Rubio M., Sanchez-Fernandez D., Sandin L., Schafer R. B., Scotti A., Shen L. Q., Skuja A., Stoll S., Straka M., Timm H., Tyufekchieva V. G., Tziortzis I., Uzunov Y., van der Lee G. H., Vannevel R., Varadinova E., Varbiro G., Velle G., Verdonschot P. F. M., Verdonschot R. C. M., Vidinova Y., Wiberg-Larsen P., Welti E. A. R., Haase, P, Bowler, D, Baker, N, Bonada, N, Domisch, S, Garcia Marquez, J, Heino, J, Hering, D, Jahnig, S, Schmidt-Kloiber, A, Stubbington, R, Altermatt, F, Alvarez-Cabria, M, Amatulli, G, Angeler, D, Archambaud-Suard, G, Jorrin, I, Aspin, T, Azpiroz, I, Banares, I, Ortiz, J, Bodin, C, Bonacina, L, Bottarin, R, Canedo-Arguelles, M, Csabai, Z, Datry, T, de Eyto, E, Dohet, A, Dorflinger, G, Drohan, E, Eikland, K, England, J, Eriksen, T, Evtimova, V, Feio, M, Ferreol, M, Floury, M, Forcellini, M, Forio, M, Fornaroli, R, Friberg, N, Fruget, J, Georgieva, G, Goethals, P, Graca, M, Graf, W, House, A, Huttunen, K, Jensen, T, Johnson, R, Jones, J, Kiesel, J, Kuglerova, L, Larranaga, A, Leitner, P, L'Hoste, L, Lizee, M, Lorenz, A, Maire, A, Arnaiz, J, Mckie, B, Millan, A, Monteith, D, Muotka, T, Murphy, J, Ozolins, D, Paavola, R, Paril, P, Penas, F, Pilotto, F, Polasek, M, Rasmussen, J, Rubio, M, Sanchez-Fernandez, D, Sandin, L, Schafer, R, Scotti, A, Shen, L, Skuja, A, Stoll, S, Straka, M, Timm, H, Tyufekchieva, V, Tziortzis, I, Uzunov, Y, van der Lee, G, Vannevel, R, Varadinova, E, Varbiro, G, Velle, G, Verdonschot, P, Verdonschot, R, Vidinova, Y, Wiberg-Larsen, P, Welti, E, Haase P., Bowler D. E., Baker N. J., Bonada N., Domisch S., Garcia Marquez J. R., Heino J., Hering D., Jahnig S. C., Schmidt-Kloiber A., Stubbington R., Altermatt F., Alvarez-Cabria M., Amatulli G., Angeler D. G., Archambaud-Suard G., Jorrin I. A., Aspin T., Azpiroz I., Banares I., Ortiz J. B., Bodin C. L., Bonacina L., Bottarin R., Canedo-Arguelles M., Csabai Z., Datry T., de Eyto E., Dohet A., Dorflinger G., Drohan E., Eikland K. A., England J., Eriksen T. E., Evtimova V., Feio M. J., Ferreol M., Floury M., Forcellini M., Forio M. A. E., Fornaroli R., Friberg N., Fruget J. -F., Georgieva G., Goethals P., Graca M. A. S., Graf W., House A., Huttunen K. -L., Jensen T. C., Johnson R. K., Jones J. I., Kiesel J., Kuglerova L., Larranaga A., Leitner P., L'Hoste L., Lizee M. -H., Lorenz A. W., Maire A., Arnaiz J. A. M., McKie B. G., Millan A., Monteith D., Muotka T., Murphy J. F., Ozolins D., Paavola R., Paril P., Penas F. J., Pilotto F., Polasek M., Rasmussen J. J., Rubio M., Sanchez-Fernandez D., Sandin L., Schafer R. B., Scotti A., Shen L. Q., Skuja A., Stoll S., Straka M., Timm H., Tyufekchieva V. G., Tziortzis I., Uzunov Y., van der Lee G. H., Vannevel R., Varadinova E., Varbiro G., Velle G., Verdonschot P. F. M., Verdonschot R. C. M., Vidinova Y., Wiberg-Larsen P., and Welti E. A. R.

Abstract

Owing to a long history of anthropogenic pressures, freshwater ecosystems are among the most vulnerable to biodiversity loss 1. Mitigation measures, including wastewater treatment and hydromorphological restoration, have aimed to improve environmental quality and foster the recovery of freshwater biodiversity 2. Here, using 1,816 time series of freshwater invertebrate communities collected across 22 European countries between 1968 and 2020, we quantified temporal trends in taxonomic and functional diversity and their responses to environmental pressures and gradients. We observed overall increases in taxon richness (0.73% per year), functional richness (2.4% per year) and abundance (1.17% per year). However, these increases primarily occurred before the 2010s, and have since plateaued. Freshwater communities downstream of dams, urban areas and cropland were less likely to experience recovery. Communities at sites with faster rates of warming had fewer gains in taxon richness, functional richness and abundance. Although biodiversity gains in the 1990s and 2000s probably reflect the effectiveness of water-quality improvements and restoration projects, the decelerating trajectory in the 2010s suggests that the current measures offer diminishing returns. Given new and persistent pressures on freshwater ecosystems, including emerging pollutants, climate change and the spread of invasive species, we call for additional mitigation to revive the recovery of freshwater biodiversity.

Published
2023

4. A global analysis of terrestrial plant litter dynamics in non-perennial waterways

Author

Datry, T., Foulquier, A., Corti, R., von Schiller, D., Tockner, K., Mendoza-Lera, C., Clément, J. C., Gessner, M. O., Moleón, M., Stubbington, R., Gücker, B., Albariño, R., Allen, D. C., Altermatt, F., Arce, M. I., Arnon, S., Banas, D., Banegas-Medina, A., Beller, E., Blanchette, M. L., Blanco-Libreros, J. F., Blessing, J. J., Boëchat, I. G., Boersma, K. S., Bogan, M. T., Bonada, N., Bond, N. R., Brintrup Barría, K. C., Bruder, A., Burrows, R. M., Cancellario, T., Canhoto, C., Carlson, S. M., Cauvy-Fraunié, S., Cid, N., Danger, M., de Freitas Terra, Bianca, De Girolamo, A. M, de La Barra, Evans, del Campo, R., Diaz-Villanueva, V. D., Dyer, F., Elosegi, A., Faye, E., Febria, C., Four, B., Gafny, S., Ghate, S. D., Gómez, R., Gómez-Gener, L., Graça, M. A. S., Guareschi, S., Hoppeler, F., Hwan, J. L., Jones, J. I., Kubheka, S., Laini, A., Langhans, S. D., Leigh, C., Little, C. J., Lorenz, S., Marshall, J. C., Martín, E., McIntosh, A. R., Meyer, E. I., Miliša, M., Mlambo, M. C., Morais, M., Moya, N., Negus, P. M., Niyogi, D. K., Papatheodoulou, A., Pardo, I., Pařil, P., Pauls, S. U., Pešić, V., Polášek, M., Robinson, C. T., Rodríguez-Lozano, P., Rolls, R. J., Sánchez-Montoya, M. M., Savić, A., Shumilova, O., Sridhar, K. R., Steward, A. L., Storey, R., Taleb, A., Uzan, A., Vander Vorste, Ross, Waltham, N. J., Woelfle-Erskine, C., Zak, D., Zarfl, C., and Zoppini, A.

Published
2018
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5. Causes, Responses, and Implications of Anthropogenic versus Natural Flow Intermittence in River Networks

Author

Datry, T, Truchy, A, Olden, JD, Busch, MH, Stubbington, R, Dodds, WK, Zipper, S, Yu, S, Messager, ML, Tonkin, JD, Kaiser, KE, Hammond, JC, Moody, EK, Burrows, RM, Sarremejane, R, DelVecchia, AG, Fork, ML, Little, CJ, Walker, RH, Walters, AW, Allen, D, Datry, T, Truchy, A, Olden, JD, Busch, MH, Stubbington, R, Dodds, WK, Zipper, S, Yu, S, Messager, ML, Tonkin, JD, Kaiser, KE, Hammond, JC, Moody, EK, Burrows, RM, Sarremejane, R, DelVecchia, AG, Fork, ML, Little, CJ, Walker, RH, Walters, AW, and Allen, D

Abstract

Rivers that do not flow year-round are the predominant type of running waters on Earth. Despite a burgeoning literature on natural flow intermittence (NFI), knowledge about the hydrological causes and ecological effects of human-induced, anthropogenic flow intermittence (AFI) remains limited. NFI and AFI could generate contrasting hydrological and biological responses in rivers because of distinct underlying causes of drying and evolutionary adaptations of their biota. We first review the causes of AFI and show how different anthropogenic drivers alter the timing, frequency and duration of drying, compared with NFI. Second, we evaluate the possible differences in biodiversity responses, ecological functions, and ecosystem services between NFI and AFI. Last, we outline knowledge gaps and management needs related to AFI. Because of the distinct hydrologic characteristics and ecological impacts of AFI, ignoring the distinction between NFI and AFI could undermine management of intermittent rivers and ephemeral streams and exacerbate risks to the ecosystems and societies downstream.

Published
2023

6. The recovery of European freshwater biodiversity has come to a halt

Author

Haase, P., Bowler, Diana, Baker, N.J., Bonada, N., Domisch, S., Garcia Marquez, J.R., Heino, J., Hering, D., Jähnig, S.C., Schmidt-Kloiber, A., Stubbington, R., Altermatt, F., Álvarez-Cabria, M., Amatulli, G., Angeler, D.G., Archambaud-Suard, G., Arrate Jorrín, I., Aspin, T., Azpiroz, I., Bañares, I., Barquín Ortiz, J., Bodin, C.L., Bonacina, L., Bottarin, R., Cañedo-Argüelles, M., Csabai, Z., Datry, T., de Eyto, E., Dohet, A., Dörflinger, G., Drohan, E., Eikland, K.A., England, J., Eriksen, T.E., Evtimova, V., Feio, M.J., Ferréol, M., Floury, M., Forcellini, M., Eurie Forio, M.A., Fornaroli, R., Friberg, N., Fruget, J.-F., Georgieva, G., Goethals, P., Graça, M.A.S., Graf, W., House, A., Huttunen, K.-L., Jensen, T.C., Johnson, R.K., Jones, J.I., Kiesel, J., Kuglerová, L., Larrañaga, A., Leitner, P., L’Hoste, L., Lizée, M.-H., Lorenz, A.W., Maire, A., Manzanos Arnaiz, J.A., McKie, B.G., Millán, A., Monteith, D., Muotka, T., Murphy, J.F., Ozolins, D., Paavola, R., Paril, P., Peñas, F.J., Pilotto, F., Polášek, M., Rasmussen, J.J., Rubio, M., Sánchez-Fernández, D., Sandin, L., Schäfer, R.B., Scotti, A., Shen, L.Q., Skuja, A., Stoll, S., Straka, M., Timm, H., Tyufekchieva, V.G., Tziortzis, I., Uzunov, Y., van der Lee, G.H., Vannevel, R., Varadinova, E., Várbíró, G., Velle, G., Verdonschot, P.F.M., Verdonschot, R.C.M., Vidinova, Y., Wiberg-Larsen, P., Welti, E.A.R., Haase, P., Bowler, Diana, Baker, N.J., Bonada, N., Domisch, S., Garcia Marquez, J.R., Heino, J., Hering, D., Jähnig, S.C., Schmidt-Kloiber, A., Stubbington, R., Altermatt, F., Álvarez-Cabria, M., Amatulli, G., Angeler, D.G., Archambaud-Suard, G., Arrate Jorrín, I., Aspin, T., Azpiroz, I., Bañares, I., Barquín Ortiz, J., Bodin, C.L., Bonacina, L., Bottarin, R., Cañedo-Argüelles, M., Csabai, Z., Datry, T., de Eyto, E., Dohet, A., Dörflinger, G., Drohan, E., Eikland, K.A., England, J., Eriksen, T.E., Evtimova, V., Feio, M.J., Ferréol, M., Floury, M., Forcellini, M., Eurie Forio, M.A., Fornaroli, R., Friberg, N., Fruget, J.-F., Georgieva, G., Goethals, P., Graça, M.A.S., Graf, W., House, A., Huttunen, K.-L., Jensen, T.C., Johnson, R.K., Jones, J.I., Kiesel, J., Kuglerová, L., Larrañaga, A., Leitner, P., L’Hoste, L., Lizée, M.-H., Lorenz, A.W., Maire, A., Manzanos Arnaiz, J.A., McKie, B.G., Millán, A., Monteith, D., Muotka, T., Murphy, J.F., Ozolins, D., Paavola, R., Paril, P., Peñas, F.J., Pilotto, F., Polášek, M., Rasmussen, J.J., Rubio, M., Sánchez-Fernández, D., Sandin, L., Schäfer, R.B., Scotti, A., Shen, L.Q., Skuja, A., Stoll, S., Straka, M., Timm, H., Tyufekchieva, V.G., Tziortzis, I., Uzunov, Y., van der Lee, G.H., Vannevel, R., Varadinova, E., Várbíró, G., Velle, G., Verdonschot, P.F.M., Verdonschot, R.C.M., Vidinova, Y., Wiberg-Larsen, P., and Welti, E.A.R.

Abstract

Owing to a long history of anthropogenic pressures, freshwater ecosystems are among the most vulnerable to biodiversity loss1. Mitigation measures, including wastewater treatment and hydromorphological restoration, have aimed to improve environmental quality and foster the recovery of freshwater biodiversity2. Here, using 1,816 time series of freshwater invertebrate communities collected across 22 European countries between 1968 and 2020, we quantified temporal trends in taxonomic and functional diversity and their responses to environmental pressures and gradients. We observed overall increases in taxon richness (0.73% per year), functional richness (2.4% per year) and abundance (1.17% per year). However, these increases primarily occurred before the 2010s, and have since plateaued. Freshwater communities downstream of dams, urban areas and cropland were less likely to experience recovery. Communities at sites with faster rates of warming had fewer gains in taxon richness, functional richness and abundance. Although biodiversity gains in the 1990s and 2000s probably reflect the effectiveness of water-quality improvements and restoration projects, the decelerating trajectory in the 2010s suggests that the current measures offer diminishing returns. Given new and persistent pressures on freshwater ecosystems, including emerging pollutants, climate change and the spread of invasive species, we call for additional mitigation to revive the recovery of freshwater biodiversity.

Published
2023

10. Reconceptualizing the hyporheic zone for nonperennial rivers and streams.

Author

DelVecchia, AG, Shanafield, M, Zimmer, MA, Busch, MH, Krabbenhoft, CA, Stubbington, R, Kaiser, KE, Burrows, RM, Hosen, J, Datry, T, Kampf, SK, Zipper, SC, Fritz, K, Costigan, K, Allen, DC, DelVecchia, AG, Shanafield, M, Zimmer, MA, Busch, MH, Krabbenhoft, CA, Stubbington, R, Kaiser, KE, Burrows, RM, Hosen, J, Datry, T, Kampf, SK, Zipper, SC, Fritz, K, Costigan, K, and Allen, DC

Abstract

Nonperennial streams dominate global river networks and are increasing in occurrence across space and time. When surface flow ceases or the surface water dries, flow or moisture can be retained in the subsurface sediments of the hyporheic zone, supporting aquatic communities and ecosystem processes. However, hydrological and ecological definitions of the hyporheic zone have been developed in perennial rivers and emphasize the mixing of water and organisms, respectively, from both the surface stream and groundwater. The adaptation of such definitions to include both humid and dry unsaturated conditions could promote characterization of how hydrological and biogeochemical variability shape ecological communities within nonperennial hyporheic zones, advancing our understanding of both ecosystem structure and function in these habitats. To conceptualize hyporheic zones for nonperennial streams, we review how water sources and surface and subsurface structure influence hydrological and physicochemical conditions. We consider the extent of this zone and how biogeochemistry and ecology might vary with surface states. We then link these components to the composition of nonperennial stream communities. Next, we examine literature to identify priorities for hydrological and ecological research exploring nonperennial hyporheic zones. Lastly, by integrating hydrology, biogeochemistry, and ecology, we recommend a multidisciplinary conceptualization of the nonperennial hyporheic zone as the porous subsurface streambed sediments that shift between lotic, lentic, humid, and dry conditions in space and time to support aquatic-terrestrial biodiversity. As river drying increases in extent because of global change, we call for holistic, interdisciplinary research across the terrestrial and aquatic sciences to apply this conceptualization to characterize hyporheic zone structure and function across the full spectrum of hydrological states.

Published
2022

14. Author Correction: A global analysis of terrestrial plant litter dynamics in non-perennial waterways

Author

Datry, T., Foulquier, A., Corti, R., von Schiller, D., Tockner, K., Mendoza-Lera, C., Clément, J. C., Gessner, M. O., Moleón, M., Stubbington, R., Gücker, B., Albariño, R., Allen, D. C., Altermatt, F., Arce, M. I., Arnon, S., Banas, D., Banegas-Medina, A., Beller, E., Blanchette, M. L., Blanco-Libreros, J. F., Blessing, J. J., Boëchat, I. G., Boersma, K. S., Bogan, M. T., Bonada, N., Bond, N. R., Brintrup Barría, K. C., Bruder, A., Burrows, R. M., Cancellario, T., Canhoto, C., Carlson, S. M., Cauvy-Fraunié, S., Cid, N., Danger, M., de Freitas Terra, Bianca, De Girolamo, A. M, de La Barra, Evans, del Campo, R., Diaz-Villanueva, V. D., Dyer, F., Elosegi, A., Faye, E., Febria, C., Four, B., Gafny, S., Ghate, S. D., Gómez, R., Gómez-Gener, L., Graça, M. A. S., Guareschi, S., Hoppeler, F., Hwan, J. L., Jones, J. I., Kubheka, S., Laini, A., Langhans, S. D., Leigh, C., Little, C. J., Lorenz, S., Marshall, J. C., Martín, E., McIntosh, A. R., Meyer, E. I., Miliša, M., Mlambo, M. C., Morais, M., Moya, N., Negus, P. M., Niyogi, D. K., Papatheodoulou, A., Pardo, I., Pařil, P., Pauls, S. U., Pešić, V., Polášek, M., Robinson, C. T., Rodríguez-Lozano, P., Rolls, R. J., Sánchez-Montoya, M. M., Savić, A., Shumilova, O., Sridhar, K. R., Steward, A. L., Storey, R., Taleb, A., Uzan, A., Vander Vorste, Ross, Waltham, N. J., Woelfle-Erskine, C., Zak, D., Zarfl, C., and Zoppini, A.

Published
2018
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16. Sediment Respiration Pulses in Intermittent Rivers and Ephemeral Streams

Author

von Schiller, D, Datry, T, Corti, R, Foulquier, A, Tockner, K, Marcé, R, García‐Baquero, G, Odriozola, I, Obrador, B, Elosegi, A, Mendoza‐Lera, C, Gessner, M O, Stubbington, R, Albariño, R, Allen, D C, Altermatt, Florian, Arce, M I, Arnon, S, Banas, D, Banegas‐Medina, A, Beller, E, Blanchette, M L, Blanco‐Libreros, J F, Blessing, J, Boëchat, I G, Boersma, K S, Bogan, M T, Bonada, N, Bond, N R, Brintrup, K, et al, University of Zurich, and von Schiller, D

Subjects
Environmental Chemistry river, Atmospheric Science, Global and Planetary Change, stream, 2306 Global and Planetary Change, temporary, 2300 General Environmental Science, 10127 Institute of Evolutionary Biology and Environmental Studies, intermittent, 2304 Environmental Chemistry, 1902 Atmospheric Science, 570 Life sciences, biology, 590 Animals (Zoology), respiration, General Environmental Science
Published
2019
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17. Communities in high definition: Spatial and environmental factors shape the micro-distribution of aquatic invertebrates

Author

Burgazzi, G., Laini, A., Ovaskainen, O., Sacco, Mattia, Stubbington, R., Viaroli, P., Burgazzi, G., Laini, A., Ovaskainen, O., Sacco, Mattia, Stubbington, R., and Viaroli, P.

Abstract

© 2020 John Wiley & Sons Ltd According to metacommunity theories, the structure of natural communities is the result of both environmental filtering and spatial processes, with their relative importance depending on factors including local habitat characteristics, functional features of organisms, and the spatial scale considered. However, few studies have explored environmental and spatial processes in riverine systems at local scales, explicitly incorporating spatial coordinates into multi-taxa distribution models. To address this gap, we conducted a small-scale study to discriminate between abiotic and biotic factors affecting the distribution of aquatic macroinvertebrates, applying metacommunity concepts. We studied a mountain section in each of three perennial streams within the Po River Basin (northern Italy). We sampled macroinvertebrates both in summer and winter, using specific in situ 50-point random sampling grids. Environmental factors, including benthic organic matter (BOM), flow velocity, water depth, and substrate were recorded together with spatial coordinates for each sampling point. The relationships between community metrics (taxon richness, abundance, biomass, biomass–abundance ratio, and functional feeding groups) and explanatory variables (environmental and spatial) were assessed using generalised additive models. The influence of the explanatory variables on community structure was analysed with joint species distribution models. Environmental variables—primarily BOM—were the main drivers affecting community metrics, whereas the effects of spatial variables varied among metrics, streams, and seasons. During summer, community structure was strongly affected by BOM and spatial position within the riverbed, the latter probably being a proxy for mass effects mediated by biotic and stochastic processes. In contrast, community structure was mainly shaped by hydraulic variables in winter. Using macroinvertebrate communities as a model group, our resu

Published
2020

18. Sediment respiration pulses in intermittent rivers and ephemeral streams

Author

von Schiller, Daniel, Datry, Thibault, Corti, Roland, Foulquier, Arnaud, Tockner, K., Marcé, R., García-Baquero, G., Odriozola, I., Obrador, Biel, Elosegi, Arturo, Mendoza-Lera, C., Gessner, M.O., Stubbington, R., Albariño, R., Allen, D.C., Altermatt, Florian, Arce, María Isabel, Arnon, Shai, Banas, Damien, Banegas-Medina, Andy, Beller, Erin, Blanchette, Melanie L., Blanco-Libreros, Juan F., Blessing, Joanna J., Boëchat, G., Boersma, Kate S., Bogan, Michael T., Bonada, Núria, Bond, Nick R., Brintrup, K., Bruder, Andreas, Burrows, Ryan M., Cancellario, Tommaso, Carlson, Stephanie M., Cauvy-Fraunié, Sophie, Cid, N., Danger, Michael, de Freitas Terra, Bianca, Dehedin, A., De Girolamo, Anna Maria, del Campo, Ruben, Diaz-Villanueva, V.D., Duerdoth, C.P., Dyer, Fiona, and Faye, Emile

Abstract

Intermittent rivers and ephemeral streams (IRES) may represent over half the global stream network, but their contribution to respiration and carbon dioxide (CO2) emissions is largely undetermined. In particular, little is known about the variability and drivers of respiration in IRES sediments upon rewetting, which could result in large pulses of CO2. We present a global study examining sediments from 200 dry IRES reaches spanning multiple biomes. Results from standardized assays show that mean respiration increased 32-fold to 66-fold upon sediment rewetting. Structural equation modeling indicates that this response was driven by sediment texture and organic matter quantity and quality, which, in turn, were influenced by climate, land use, and riparian plant cover. Our estimates suggest that respiration pulses resulting from rewetting of IRES sediments could contribute significantly to annual CO2 emissions from the global stream network, with a single respiration pulse potentially increasing emission by 0.2–0.7%. As the spatial and temporal extent of IRES increases globally, our results highlight the importance of recognizing the influence of wetting-drying cycles on respiration and CO2 emissions in stream networks.

Published
2019

20. Correction:A global analysis of terrestrial plant litter dynamics in non-perennial waterways (Nature Geoscience DOI: 10.1038/s41561-018-0134-4)

Author

Datry, T., Foulquier, A., Corti, R., Von Schiller, D., Tockner, K., Mendoza-Lera, C., Clément, J. C., Gessner, M. O., Moleón, M., Stubbington, R., Gücker, B., Albarinõ, R., Allen, D. C., Altermatt, F., Arce, M. I., Arnon, S., Banas, D., Banegas-Medina, A., Beller, E., Blanchette, M. L., Blanco-Libreros, J. F., Blessing, J. J., Boëchat, I. G., Boersma, K. S., Bogan, M. T., Bonada, N., Bond, N. R., Brintrup Barriá, K. C., Bruder, A., Burrows, R. M., Cancellario, T., Canhoto, C., Carlson, S. M., Cauvy-Fraunié, S., Cid, N., Danger, M., De Freitas Terra, Bianca, De Girolamo, A. M., De La Barra, Evans, Del Campo, R., Diaz-Villanueva, V. D., Dyer, F., Elosegi, A., Faye, E., Febria, C., Four, B., Gafny, S., Ghate, S. D., Gómez, R., Gómez-Gener, L., Gracą, M. A.S., Guareschi, S., Hoppeler, F., Hwan, J. L., Jones, J. I., Kubheka, S., Laini, A., Langhans, S. D., Leigh, C., Little, C. J., Lorenz, S., Marshall, J. C., Martín, E., McIntosh, A. R., Meyer, E. I., Miliša, M., Mlambo, M. C., Morais, M., Moya, N., Negus, P. M., Niyogi, D. K., Papatheodoulou, A., Pardo, I., Pařil, P., Pauls, S. U., Pešić, V., Polášek, M., Robinson, C. T., Rodríguez-Lozano, P., Rolls, R. J., Sánchez-Montoya, M. M., Savić, A., Shumilova, O., Sridhar, K. R., Steward, A. L., Storey, R., Taleb, A., Uzan, A., Vander Vorste, Ross, Waltham, N. J., Woelfle-Erskine, C., Zak, D., Zarfl, C., and Zoppini, A.

Abstract

In the version of this Article originally published, the affiliation for M. I. Arce was incorrect; it should have been: Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany. This has now been corrected in the online versions of the Article.

Published
2018
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21. Sediment Respiration Pulses in Intermittent Rivers and Ephemeral Streams

Author

von Schiller, D., primary, Datry, T., additional, Corti, R., additional, Foulquier, A., additional, Tockner, K., additional, Marcé, R., additional, García‐Baquero, G., additional, Odriozola, I., additional, Obrador, B., additional, Elosegi, A., additional, Mendoza‐Lera, C., additional, Gessner, M. O., additional, Stubbington, R., additional, Albariño, R., additional, Allen, D. C., additional, Altermatt, F., additional, Arce, M. I., additional, Arnon, S., additional, Banas, D., additional, Banegas‐Medina, A., additional, Beller, E., additional, Blanchette, M. L., additional, Blanco‐Libreros, J. F., additional, Blessing, J., additional, Boëchat, I. G., additional, Boersma, K. S., additional, Bogan, M. T., additional, Bonada, N., additional, Bond, N. R., additional, Brintrup, K., additional, Bruder, A., additional, Burrows, R. M., additional, Cancellario, T., additional, Carlson, S. M., additional, Cauvy‐Fraunié, S., additional, Cid, N., additional, Danger, M., additional, de Freitas Terra, B., additional, Dehedin, A., additional, De Girolamo, A. M., additional, del Campo, R., additional, Díaz‐Villanueva, V., additional, Duerdoth, C. P., additional, Dyer, F., additional, Faye, E., additional, Febria, C., additional, Figueroa, R., additional, Four, B., additional, Gafny, S., additional, Gómez, R., additional, Gómez‐Gener, L., additional, Graça, M. A. S., additional, Guareschi, S., additional, Gücker, B., additional, Hoppeler, F., additional, Hwan, J. L., additional, Kubheka, S., additional, Laini, A., additional, Langhans, S. D., additional, Leigh, C., additional, Little, C. J., additional, Lorenz, S., additional, Marshall, J., additional, Martín, E. J., additional, McIntosh, A., additional, Meyer, E. I., additional, Miliša, M., additional, Mlambo, M. C., additional, Moleón, M., additional, Morais, M., additional, Negus, P., additional, Niyogi, D., additional, Papatheodoulou, A., additional, Pardo, I., additional, Pařil, P., additional, Pešić, V., additional, Piscart, C., additional, Polášek, M., additional, Rodríguez‐Lozano, P., additional, Rolls, R. J., additional, Sánchez‐Montoya, M. M., additional, Savić, A., additional, Shumilova, O., additional, Steward, A., additional, Taleb, A., additional, Uzan, A., additional, Vander Vorste, R., additional, Waltham, N., additional, Woelfle‐Erskine, C., additional, Zak, D., additional, Zarfl, C., additional, and Zoppini, A., additional

Published
2019
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22. Sediment Respiration Pulses in Intermittent Rivers and Ephemeral Streams

Author

von Schiller, D., Datry, T., Corti, R., Foulquier, A., Tockner, K., Marce, R., Garcia-Baquero, G., Odriozola, I, Obrador, B., Elosegi, A., Mendoza-Lera, C., Gessner, M. O., Stubbington, R., Albarino, R., Allen, D. C., Altermatt, F., Arce, M. , I, Arnon, S., Banas, D., Banegas-Medina, A., Beller, E., Blanchette, M. L., Blanco-Libreros, J. F., Blessing, J., Boechat, I. G., Boersma, K. S., Bogan, M. T., Bonada, N., Bond, N. R., Brintrup, K., Bruder, A., Burrows, R. M., Cancellario, T., Carlson, S. M., Cauvy-Fraunie, S., Cid, N., Danger, M., de Freitas Terra, B., Dehedin, A., De Girolamo, A. M., del Campo, R., Diaz-Villanueva, V., Duerdoth, C. P., Dyer, F., Faye, E., Febria, C., Figueroa, R., Four, B., Gafny, S., Gomez, R., Gómez-Gener, Lluís, Graca, M. A. S., Guareschi, S., Gucker, B., Hoppeler, F., Hwan, J. L., Kubheka, S., Laini, A., Langhans, S. D., Leigh, C., Little, C. J., Lorenz, S., Marshall, J., Martin, E. J., McIntosh, A., Meyer, E. , I, Milisa, M., Mlambo, M. C., Moleon, M., Morais, M., Negus, P., Niyogi, D., Papatheodoulou, A., Pardo, I, Paril, P., Pesic, V, Piscart, C., Polasek, M., Rodriguez-Lozano, P., Rolls, R. J., Sanchez-Montoya, M. M., Savic, A., Shumilova, O., Steward, A., Taleb, A., Uzan, A., Vander Vorste, R., Waltham, N., Woelfle-Erskine, C., Zak, D., Zarfl, C., Zoppini, A., von Schiller, D., Datry, T., Corti, R., Foulquier, A., Tockner, K., Marce, R., Garcia-Baquero, G., Odriozola, I, Obrador, B., Elosegi, A., Mendoza-Lera, C., Gessner, M. O., Stubbington, R., Albarino, R., Allen, D. C., Altermatt, F., Arce, M. , I, Arnon, S., Banas, D., Banegas-Medina, A., Beller, E., Blanchette, M. L., Blanco-Libreros, J. F., Blessing, J., Boechat, I. G., Boersma, K. S., Bogan, M. T., Bonada, N., Bond, N. R., Brintrup, K., Bruder, A., Burrows, R. M., Cancellario, T., Carlson, S. M., Cauvy-Fraunie, S., Cid, N., Danger, M., de Freitas Terra, B., Dehedin, A., De Girolamo, A. M., del Campo, R., Diaz-Villanueva, V., Duerdoth, C. P., Dyer, F., Faye, E., Febria, C., Figueroa, R., Four, B., Gafny, S., Gomez, R., Gómez-Gener, Lluís, Graca, M. A. S., Guareschi, S., Gucker, B., Hoppeler, F., Hwan, J. L., Kubheka, S., Laini, A., Langhans, S. D., Leigh, C., Little, C. J., Lorenz, S., Marshall, J., Martin, E. J., McIntosh, A., Meyer, E. , I, Milisa, M., Mlambo, M. C., Moleon, M., Morais, M., Negus, P., Niyogi, D., Papatheodoulou, A., Pardo, I, Paril, P., Pesic, V, Piscart, C., Polasek, M., Rodriguez-Lozano, P., Rolls, R. J., Sanchez-Montoya, M. M., Savic, A., Shumilova, O., Steward, A., Taleb, A., Uzan, A., Vander Vorste, R., Waltham, N., Woelfle-Erskine, C., Zak, D., Zarfl, C., and Zoppini, A.

Abstract

Intermittent rivers and ephemeral streams (IRES) may represent over half the global stream network, but their contribution to respiration and carbon dioxide (CO2) emissions is largely undetermined. In particular, little is known about the variability and drivers of respiration in IRES sediments upon rewetting, which could result in large pulses of CO2. We present a global study examining sediments from 200 dry IRES reaches spanning multiple biomes. Results from standardized assays show that mean respiration increased 32-fold to 66-fold upon sediment rewetting. Structural equation modeling indicates that this response was driven by sediment texture and organic matter quantity and quality, which, in turn, were influenced by climate, land use, and riparian plant cover. Our estimates suggest that respiration pulses resulting from rewetting of IRES sediments could contribute significantly to annual CO2 emissions from the global stream network, with a single respiration pulse potentially increasing emission by 0.2-0.7%. As the spatial and temporal extent of IRES increases globally, our results highlight the importance of recognizing the influence of wetting-drying cycles on respiration and CO2 emissions in stream networks.

Published
2019
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23. Sediment Respiration Pulses in Intermittent Rivers and Ephemeral Streams

Author

Von Schiller Calle, Daniel Gaspar, Datry, T., Corti, R., Foulquier, A., Tockner, K., Marcé, R., García-Baquero, G., Odriozola, I., Obrador, B., Elosegi Irurtia, Arturo, Mendoza-Lera, C., Gessner, M.O., Stubbington, R., Albariño, R., Allen, D.C., Altermatt, F., Arce, M.I., Arnon, S., Banas, D., Banegas-Medina, A., Beller, E., Blanchette, M.L., Blanco-Libreros, J.F., Blessing, J., Boëchat, I.G., Boersma, K.S., Bogan, M.T., Bonada, N., Bond, N.R., Brintrup, K., Bruder, A., Burrows, R.M., Cancellario, T., Carlson, S.M., Cauvy-Fraunié, S., Cid, N., Danger, M., de Freitas Terra, B., Dehedin, A., De Girolamo, A.M., del Campo, R., Díaz-Villanueva, V., Duerdoth, C.P., Dyer, F., Faye, E., Febria, C., Figueroa, R., Four, B., Gafny, S., Gómez, R., Gómez-Gener, L., Graça, M.A.S., Guareschi, S., Gücker, B., Hoppeler, F., Hwan, J.L., Kubheka, S., Laini, A., Langhans, S.D., Leigh, C., Little, C.J., Lorenz, S., Marshall, J., Martín, E.J., McIntosh, A., Meyer, E.I., Milisa, M., Mlambo, M.C., Moleón, M., Morais, M., Negus, P., Niyogi, D., Papatheodoulou, A., Pardo, I., Paril, P., Pesic, V., Piscart, C., Polasek, M., Rodríguez-Lozano, P., Rolls, R.J., Sánchez-Montoya, M.M., Savic, A., Shumilova, O., Steward, A., Taleb, A., Uzan, A., Van der Vorste, R., Waltham, N., Woelfle-Erskine, C., Zak, D., Zarfl, C., Zoppini, A., Von Schiller Calle, Daniel Gaspar, Datry, T., Corti, R., Foulquier, A., Tockner, K., Marcé, R., García-Baquero, G., Odriozola, I., Obrador, B., Elosegi Irurtia, Arturo, Mendoza-Lera, C., Gessner, M.O., Stubbington, R., Albariño, R., Allen, D.C., Altermatt, F., Arce, M.I., Arnon, S., Banas, D., Banegas-Medina, A., Beller, E., Blanchette, M.L., Blanco-Libreros, J.F., Blessing, J., Boëchat, I.G., Boersma, K.S., Bogan, M.T., Bonada, N., Bond, N.R., Brintrup, K., Bruder, A., Burrows, R.M., Cancellario, T., Carlson, S.M., Cauvy-Fraunié, S., Cid, N., Danger, M., de Freitas Terra, B., Dehedin, A., De Girolamo, A.M., del Campo, R., Díaz-Villanueva, V., Duerdoth, C.P., Dyer, F., Faye, E., Febria, C., Figueroa, R., Four, B., Gafny, S., Gómez, R., Gómez-Gener, L., Graça, M.A.S., Guareschi, S., Gücker, B., Hoppeler, F., Hwan, J.L., Kubheka, S., Laini, A., Langhans, S.D., Leigh, C., Little, C.J., Lorenz, S., Marshall, J., Martín, E.J., McIntosh, A., Meyer, E.I., Milisa, M., Mlambo, M.C., Moleón, M., Morais, M., Negus, P., Niyogi, D., Papatheodoulou, A., Pardo, I., Paril, P., Pesic, V., Piscart, C., Polasek, M., Rodríguez-Lozano, P., Rolls, R.J., Sánchez-Montoya, M.M., Savic, A., Shumilova, O., Steward, A., Taleb, A., Uzan, A., Van der Vorste, R., Waltham, N., Woelfle-Erskine, C., Zak, D., Zarfl, C., and Zoppini, A.

Abstract

Intermittent rivers and ephemeral streams (IRES) may represent over half the global stream network, but their contribution to respiration and carbon dioxide (CO2) emissions is largely undetermined. In particular, little is known about the variability and drivers of respiration in IRES sediments upon rewetting, which could result in large pulses of CO2. We present a global study examining sediments from 200 dry IRES reaches spanning multiple biomes. Results from standardized assays show that mean respiration increased 32-fold to 66-fold upon sediment rewetting. Structural equation modeling indicates that this response was driven by sediment texture and organic matter quantity and quality, which, in turn, were influenced by climate, land use, and riparian plant cover. Our estimates suggest that respiration pulses resulting from rewetting of IRES sediments could contribute significantly to annual CO2 emissions from the global stream network, with a single respiration pulse potentially increasing emission by 0.2 0.7%. As the spatial and temporal extent of IRES increases globally, our results highlight the importance of recognizing the influence of wetting-drying cycles on respiration and CO2 emissions in stream networks. (c)2019. American Geophysical Union. All Rights Reserved.

Published
2019

24. Simulating rewetting events in intermittent rivers and ephemeral streams: A global analysis of leached nutrients and organic matter

Author

Shumilova, O., Zak, D., Datry, T., Von Schiller Calle, Daniel Gaspar, Corti, R., Foulquier, A., Obrador, B., Tockner, K., Allan, D.C., Altermatt, F., Arce, M.I., Arnon, S., Banas, D., Banegas-Medina, A., Beller, E., Blanchette, M.L., Blanco-Libreros, J.F., Blessing, J., Boëchat, I.G., Boersma, K., Bogan, M.T., Bonada, N., Bond, N.R., Brintrup, K., Bruder, A., Burrows, R., Cancellario, T., Carlson, S.M., Cauvy-Fraunié, S., Cid, N., Danger, M., de Freitas, Terra, B., Girolamo, A.M.D., del Campo, R., Dyer, F., Elosegi, A., Faye, E., Febria, C., Figueroa, R., Four, B., Gessner, M.O., Gnohossou, P., Cerezo, R.G., Gomez-Gener, L., Graça, M.A.S., Guareschi, S., Gücker, B., Hwan, J.L., Kubheka, S., Langhans, S.D., Leigh, C., Little, C.J., Lorenz, S., Marshall, J., McIntosh, A., Mendoza-Lera, C., Meyer, E.I., Milisa, M., Mlambo, M.C., Moleón, M., Negus, P., Niyogi, D., Papatheodoulou, A., Pardo, I., Paril, P., Pesic, V., Rodriguez-Lozano, P., Rolls, R.J., Sanchez-Montoya, M.M., Savic, A., Steward, A., Stubbington, R., Taleb, A., Vorste, R.V., Waltham, N., Zoppini, A., Zarfl, C., Shumilova, O., Zak, D., Datry, T., Von Schiller Calle, Daniel Gaspar, Corti, R., Foulquier, A., Obrador, B., Tockner, K., Allan, D.C., Altermatt, F., Arce, M.I., Arnon, S., Banas, D., Banegas-Medina, A., Beller, E., Blanchette, M.L., Blanco-Libreros, J.F., Blessing, J., Boëchat, I.G., Boersma, K., Bogan, M.T., Bonada, N., Bond, N.R., Brintrup, K., Bruder, A., Burrows, R., Cancellario, T., Carlson, S.M., Cauvy-Fraunié, S., Cid, N., Danger, M., de Freitas, Terra, B., Girolamo, A.M.D., del Campo, R., Dyer, F., Elosegi, A., Faye, E., Febria, C., Figueroa, R., Four, B., Gessner, M.O., Gnohossou, P., Cerezo, R.G., Gomez-Gener, L., Graça, M.A.S., Guareschi, S., Gücker, B., Hwan, J.L., Kubheka, S., Langhans, S.D., Leigh, C., Little, C.J., Lorenz, S., Marshall, J., McIntosh, A., Mendoza-Lera, C., Meyer, E.I., Milisa, M., Mlambo, M.C., Moleón, M., Negus, P., Niyogi, D., Papatheodoulou, A., Pardo, I., Paril, P., Pesic, V., Rodriguez-Lozano, P., Rolls, R.J., Sanchez-Montoya, M.M., Savic, A., Steward, A., Stubbington, R., Taleb, A., Vorste, R.V., Waltham, N., Zoppini, A., and Zarfl, C.

Abstract

Climate change and human pressures are changing the global distribution and the extent of intermittent rivers and ephemeral streams (IRES), which comprise half of the global river network area. IRES are characterized by periods of flow cessation, during which channel substrates accumulate and undergo physico-chemical changes (preconditioning), and periods of flow resumption, when these substrates are rewetted and release pulses of dissolved nutrients and organic matter (OM). However, there are no estimates of the amounts and quality of leached substances, nor is there information on the underlying environmental constraints operating at the global scale. We experimentally simulated, under standard laboratory conditions, rewetting of leaves, riverbed sediments, and epilithic biofilms collected during the dry phase across 205 IRES from five major climate zones. We determined the amounts and qualitative characteristics of the leached nutrients and OM, and estimated their areal fluxes from riverbeds. In addition, we evaluated the variance in leachate characteristics in relation to selected environmental variables and substrate characteristics. We found that sediments, due to their large quantities within riverbeds, contribute most to the overall flux of dissolved substances during rewetting events (56% 98%), and that flux rates distinctly differ among climate zones. Dissolved organic carbon, phenolics, and nitrate contributed most to the areal fluxes. The largest amounts of leached substances were found in the continental climate zone, coinciding with the lowest potential bioavailability of the leached OM. The opposite pattern was found in the arid zone. Environmental variables expected to be modified under climate change (i.e. potential evapotranspiration, aridity, dry period duration, land use) were correlated with the amount of leached substances, with the strongest relationship found for sediments. These results show that the role of IRES should be accounted for in g

Published
2019

25. Simulating rewetting events in intermittent rivers and ephemeral streams: A global analysis of leached nutrients and organic matter

Author

Shumilova, O, Zak, D, Datry, T, von Schiller, D, Corti, R, Foulquier, A, Obrador, B, Tockner, K, Allan, DC, Altermatt, F, Isabel Arce, M, Arnon, S, Banas, D, Banegas-Medina, A, Beller, E, Blanchette, ML, Blanco-Libreros, JF, Blessing, J, Boechat, IG, Boersma, K, Bogan, MT, Bonada, N, Bond, NR, Brintrup, K, Bruder, A, Burrows, R, Cancellario, T, Carlson, SM, Cauvy-Fraunie, S, Cid, N, Danger, M, de Freitas Terra, B, De Girolamo, AM, del Campo, R, Dyer, F, Elosegi, A, Faye, E, Febria, C, Figueroa, R, Four, B, Gessner, MO, Gnohossou, P, Cerezo, RG, Gomez-Gener, L, Graca, MAS, Guareschi, S, Guecker, B, Hwan, JL, Kubheka, S, Langhans, SD, Leigh, C, Little, CJ, Lorenz, S, Marshall, J, McIntosh, A, Mendoza-Lera, C, Meyer, EI, Milisa, M, Mlambo, MC, Moleon, M, Negus, P, Niyogi, D, Papatheodoulou, A, Pardo, I, Paril, P, Pesic, V, Rodriguez-Lozano, P, Rolls, RJ, Sanchez-Montoya, MM, Savic, A, Steward, A, Stubbington, R, Taleb, A, Vander Vorste, R, Waltham, N, Zoppini, A, Zarfl, C, Shumilova, O, Zak, D, Datry, T, von Schiller, D, Corti, R, Foulquier, A, Obrador, B, Tockner, K, Allan, DC, Altermatt, F, Isabel Arce, M, Arnon, S, Banas, D, Banegas-Medina, A, Beller, E, Blanchette, ML, Blanco-Libreros, JF, Blessing, J, Boechat, IG, Boersma, K, Bogan, MT, Bonada, N, Bond, NR, Brintrup, K, Bruder, A, Burrows, R, Cancellario, T, Carlson, SM, Cauvy-Fraunie, S, Cid, N, Danger, M, de Freitas Terra, B, De Girolamo, AM, del Campo, R, Dyer, F, Elosegi, A, Faye, E, Febria, C, Figueroa, R, Four, B, Gessner, MO, Gnohossou, P, Cerezo, RG, Gomez-Gener, L, Graca, MAS, Guareschi, S, Guecker, B, Hwan, JL, Kubheka, S, Langhans, SD, Leigh, C, Little, CJ, Lorenz, S, Marshall, J, McIntosh, A, Mendoza-Lera, C, Meyer, EI, Milisa, M, Mlambo, MC, Moleon, M, Negus, P, Niyogi, D, Papatheodoulou, A, Pardo, I, Paril, P, Pesic, V, Rodriguez-Lozano, P, Rolls, RJ, Sanchez-Montoya, MM, Savic, A, Steward, A, Stubbington, R, Taleb, A, Vander Vorste, R, Waltham, N, Zoppini, A, and Zarfl, C

Abstract

Climate change and human pressures are changing the global distribution and the extent of intermittent rivers and ephemeral streams (IRES), which comprise half of the global river network area. IRES are characterized by periods of flow cessation, during which channel substrates accumulate and undergo physico-chemical changes (preconditioning), and periods of flow resumption, when these substrates are rewetted and release pulses of dissolved nutrients and organic matter (OM). However, there are no estimates of the amounts and quality of leached substances, nor is there information on the underlying environmental constraints operating at the global scale. We experimentally simulated, under standard laboratory conditions, rewetting of leaves, riverbed sediments, and epilithic biofilms collected during the dry phase across 205 IRES from five major climate zones. We determined the amounts and qualitative characteristics of the leached nutrients and OM, and estimated their areal fluxes from riverbeds. In addition, we evaluated the variance in leachate characteristics in relation to selected environmental variables and substrate characteristics. We found that sediments, due to their large quantities within riverbeds, contribute most to the overall flux of dissolved substances during rewetting events (56%–98%), and that flux rates distinctly differ among climate zones. Dissolved organic carbon, phenolics, and nitrate contributed most to the areal fluxes. The largest amounts of leached substances were found in the continental climate zone, coinciding with the lowest potential bioavailability of the leached OM. The opposite pattern was found in the arid zone. Environmental variables expected to be modified under climate change (i.e. potential evapotranspiration, aridity, dry period duration, land use) were correlated with the amount of leached substances, with the strongest relationship found for sediments. These results show that the role of IRES should be accounted for in g

Published
2019

26. Sediment Respiration Pulses in Intermittent Rivers and Ephemeral Streams

Author

von Schiller, D; https://orcid.org/0000-0002-9493-3244, Datry, T; https://orcid.org/0000-0003-1390-6736, Corti, R, Foulquier, A, Tockner, K, Marcé, R; https://orcid.org/0000-0002-7416-4652, García‐Baquero, G; https://orcid.org/0000-0001-6550-1584, Odriozola, I; https://orcid.org/0000-0002-5289-7935, Obrador, B; https://orcid.org/0000-0003-4050-0491, Elosegi, A, Mendoza‐Lera, C; https://orcid.org/0000-0002-3222-2498, Gessner, M O, Stubbington, R, Albariño, R, Allen, D C, Altermatt, Florian, Arce, M I, Arnon, S; https://orcid.org/0000-0002-7109-8979, Banas, D, Banegas‐Medina, A, Beller, E, Blanchette, M L, Blanco‐Libreros, J F, Blessing, J, Boëchat, I G; https://orcid.org/0000-0002-9651-6364, Boersma, K S, Bogan, M T, Bonada, N, Bond, N R; https://orcid.org/0000-0003-4294-6008, Brintrup, K, et al, von Schiller, D; https://orcid.org/0000-0002-9493-3244, Datry, T; https://orcid.org/0000-0003-1390-6736, Corti, R, Foulquier, A, Tockner, K, Marcé, R; https://orcid.org/0000-0002-7416-4652, García‐Baquero, G; https://orcid.org/0000-0001-6550-1584, Odriozola, I; https://orcid.org/0000-0002-5289-7935, Obrador, B; https://orcid.org/0000-0003-4050-0491, Elosegi, A, Mendoza‐Lera, C; https://orcid.org/0000-0002-3222-2498, Gessner, M O, Stubbington, R, Albariño, R, Allen, D C, Altermatt, Florian, Arce, M I, Arnon, S; https://orcid.org/0000-0002-7109-8979, Banas, D, Banegas‐Medina, A, Beller, E, Blanchette, M L, Blanco‐Libreros, J F, Blessing, J, Boëchat, I G; https://orcid.org/0000-0002-9651-6364, Boersma, K S, Bogan, M T, Bonada, N, Bond, N R; https://orcid.org/0000-0003-4294-6008, Brintrup, K, and et al

Abstract

Intermittent rivers and ephemeral streams (IRES) may represent over half the global stream network, but their contribution to respiration and carbon dioxide (CO2) emissions is largely undetermined. In particular, little is known about the variability and drivers of respiration in IRES sediments upon rewetting, which could result in large pulses of CO2. We present a global study examining sediments from 200 dry IRES reaches spanning multiple biomes. Results from standardized assays show that mean respiration increased 32‐fold to 66‐fold upon sediment rewetting. Structural equation modeling indicates that this response was driven by sediment texture and organic matter quantity and quality, which, in turn, were influenced by climate, land use, and riparian plant cover. Our estimates suggest that respiration pulses resulting from rewetting of IRES sediments could contribute significantly to annual CO2 emissions from the global stream network, with a single respiration pulse potentially increasing emission by 0.2–0.7%. As the spatial and temporal extent of IRES increases globally, our results highlight the importance of recognizing the influence of wetting‐drying cycles on respiration and CO2 emissions in stream networks.

Published
2019

27. The natural capital of temporary rivers: characterising the value of dynamic aquatic-terrestrial habitats. Valuing Nature Natural Capital Synthesis Reports, VNP12

Author

Stubbington, R, England, J, Acreman, M, Wood, PJ, Westwood, C, Boon, P, Mainstone, C, Macadam, C, Bates, A, House, A, and Jorda-Capdevila, D

Abstract

Temporary rivers naturally transition between flowing, pool and dry states, creating aquatic–terrestrial habitat mosaics that change in space and time. These dynamic habitats are common in the UK's cool, wet climate. Here, they take many forms, from headwater streams that may dominate networks in remote uplands, to winterbourne rivers crossing the chalk of south England. We examine published and unpublished sources to provide an evidence-informed characterisation of the natural assets in temporary rivers.

Published
2018

28. Ecologically relevant flow metrics for intermittent rivers and ephemeral streams

Author

Laaha, G., Gauster, T., Sauquet, Eric, Sefton, C., Stubbington, R., Parry, S., BOKU UNIVERSITY VIENNA AUT, IRSTEA LYON UR RIVERLY FRA, CEH CENTRE FOR ECOLOGY AND HYDROLOGY WALLINGFORD GBR, UNIVERSITY OF BIRMINGHAM GBR, University of Natural Resources and Life Sciences (BOKU), RiverLy (UR Riverly), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Centre for Ecology and Hydrology [Bangor] (CEH), Natural Environment Research Council (NERC), Partenaires IRSTEA, and Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)

Subjects
SMIRES, [SDE]Environmental Sciences, HYDROLOGIE, hydrology, intermittent stream, COURS D'EAU TEMPORAIRE
Abstract

International audience; The COST-Action SMIRES brings together scientists from various disciplines to foster a common understanding of hydrology, hydrochemistry and ecology of intermittent rivers and ephemeral streams. Such rivers are characterized by episodes of stagnant waters or drying-off, occurring either annually during the drought season or exceptionally during extreme drought years. Since intermittency can be seen as a special case of low-flow regimes that reach zero-flow, relevant low flow characteristics exist but need to be adopted to characterise ecologically relevant features of the particular flow regime. In this paper we present a set of metrics for characterizing flow intermittency in an ecologically relevant way, stemming from interdisciplinary discussions among SMIRES experts of various disciplines. The indices are compatible with standard low flow indices of the WMO manual on low flow estimation and prediction (Gustard and Demuth, 2008) and the handbook Hydrological Drought (Tallaksen and Van Lanen, 2004), extending these indices to noflow conditions. The metrics characterise the statistical distribution including mean and variance of the proportion of no-flow years, the annual number of no-flow-days, the duration of no-flow spells and the timing of seasonality of onset and termination of no-flow spells. In addition, the dynamics of drying-off and rewetting are characterized. An R software package (Gauster and Laaha, 2017) has been compiled that enables uniform calculation of indices at the annual, seasonal and monthly scale, suitable for a broad range of hydrological regimes. The paper concludes with illustrating examples of how the metrics can be applied in eco-hydrological studies of rivers that cease to flow.

Published
2018

29. Biomonitoring of intermittent rivers and ephemeral streams in Europe: current practice and priorities to enhance ecological status assessments

Author

Stubbington, R, Chadd, R, Cid, N, Csabai, Z, Miliša, M, Morais, M, Munné, A, Pařil, P, Pešić, V, Tziortzis, I, Verdonschot, RCM, Datry, T, Nottingham Trent University, ENVIRONMENT AGENCY OF ENGLAND SPALDING GBR, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), FRESHWATER ECOLOGY AND MANAGEMENT RESEARCH GROUP UNIVERSITAT DE BARCELONA ESP, UNIVERSITY OF PECS HUN, University of Zagreb, UNIVERSIDADE DE EVORA PRT, CATALAN WATER AGENCY BARCELONA ESP, Masaryk University [Brno] (MUNI), UNIVERSITY OF MONTENEGRO SRB, WATER DEVELOPMENT DEPARTMENT MINISTRY OF AGRICULTURE RURAL DEVELOPMENT AND ENVIRONMENT NICOSIA CYP, Wageningen University and Research [Wageningen] (WUR), RiverLy (UR Riverly), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), ELSEVIER, and University of Montenegro (UCG)

Subjects
bioassessment, Water and Food, Temporary streams Temporary rivers Bioassessment Bioindicators Water Framework Directive River typology, Water en Voedsel, river typology, BIOINDICATORS, Water Framework Directive, TEMPORARY RIVERS, TEMPORARY STREAMS, WATER FRAMEWORK DIRECTIVE, temporary rivers, bioindicators, [SDE]Environmental Sciences, RIVER TYPOLOGY, Temporary streams, BIOASSESSMENT
Abstract

International audience; Intermittent rivers and ephemeral streams (IRES) are common across Europe and dominate some Mediterranean river networks. In all climate zones, IRES support high biodiversity and provide ecosystem services. As dynamic ecosystems that transition between flowing, pool, and dry states, IRES are typically poorly represented in biomonitoring programmes implemented to characterize EU Water Framework Directive ecological status. We report the results of a survey completed by representatives from 20 European countries to identify current challenges to IRES status assessment, examples of best practice, and priorities for future research. We identify five major barriers to effective ecological status classification in IRES: 1. the exclusion of IRES from Water Framework Directive biomonitoring based on their small catchment size; 2. the lack of river typologies that distinguish between contrasting IRES; 3. difficulties in defining the 'reference conditions' that represent unimpacted dynamic ecosystems; 4. classification of IRES ecological status based on lotic communities sampled using methods developed for perennial rivers; and 5. a reliance on taxonomic characterization of local communities. Despite these challenges, we recognize examples of innovative practice that can inform modification of current biomonitoring activity to promote effective IRES status classification. Priorities for future research include reconceptualization of the reference condition approach to accommodate spatiotemporal fluctuations in community composition, and modification of indices of ecosystem health to recognize both taxon-specific sensitivities to intermittence and dispersal abilities, within a landscape context.

Published
2018
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30. Chapter 4.8: Resistance, resilience, and community recovery in intermittent rivers and ephemeral streams

Author

Bogan, M.T., Chester, E.T., Datry, T., Murphy, A.L., Robson, B.J., Ruhi, A., Stubbington, R., Whitney, J.E., UNIVERSITY OF ARIZONA TUCSON USA, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), MURDOCH UNIVERSITY AUS, DEAKIN UNIVERSITY WARRNAMBOOL AUS, Milieux aquatiques, écologie et pollutions (UR MALY), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Monash University [Melbourne], ARIZONA STATE UNIVERSITY TEMPE USA, Nottingham Trent University, and PITTSBURG STATE UNIVERSITY USA

Subjects
fungi, [SDE]Environmental Sciences
Abstract

International audience; Intermittent rivers and ephemeral streams (IRES) are temporally and spatially dynamic, experiencing alternating wet and dry phases and supporting both aquatic and terrestrial habitats – Persistence in these highly variable habitats requires aquatic taxa to be resistant or resilient to disturbances such as drying – Resistance mechanisms include tolerance of extreme physicochemical conditions and having desiccation-resistant dormant stages; resilience mechanisms require the ability to disperse instream or overland – Terrestrial taxa inhabiting dry riverbeds must be resistant or resilient to periodic flooding of their habitat – Resistance and resilience mechanisms interact to facilitate community recovery – Human disturbance alters recovery pathways and affects long-term persistence of aquatic and terrestrial species in IRES

Published
2017

31. Chapter 4.3. The biota of intermittent rivers and ephemeral streams: aquatic invertebrates

Author

Stubbington, R., Bogan, M.T., Bonada, N., Boulton, A.J., Datry, T., Leigh, C., Vander Vorste, R., Nottingham Trent University, UNIVERSITY OF ARIZONA TUCSON USA, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), UNIVERSITAT DE BARCELONA ESP, UNIVERSITY OF NEW ENGLAND ARMIDALE AUS, Milieux aquatiques, écologie et pollutions (UR MALY), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Centre de Synthèse et d’Analyse sur la Biodiversité (CESAB), Fondation pour la recherche sur la Biodiversité (FRB), and VIRGINIA WATER RESOURCES RESEARCH CENTER BLACKSBURG USA

Subjects
fungi, [SDE]Environmental Sciences, human activities
Abstract

International audience; Intermittent rivers and ephemeral streams (IRES) are temporally dynamic ecosystems that can support a diverse and distinctive aquatic invertebrate fauna – Resistance and resilience mechanisms allow species and communities to persist in IRES during dry phases and to recolonize quickly once flow returns – Human influences including climate change and water abstraction alter natural patterns of flow intermittence, with increasing intermittence typically reducing aquatic invertebrate diversity – Effective management, restoration, and legislation are needed to safeguard the diversity of IRES invertebrate communities

Published
2017

32. Sediment Respiration Pulses in Intermittent Rivers and Ephemeral Streams.

Author

Schiller, D., Datry, T., Corti, R., Foulquier, A., Tockner, K., Marcé, R., García‐Baquero, G., Odriozola, I., Obrador, B., Elosegi, A., Mendoza‐Lera, C., Gessner, M. O., Stubbington, R., Albariño, R., Allen, D. C., Altermatt, F., Arce, M. I., Arnon, S., Banas, D., and Banegas‐Medina, A.

Subjects
EPHEMERAL streams, RESPIRATION, STRUCTURAL equation modeling, SEDIMENTS, RIVERS, GROUND cover plants, SOIL texture
Abstract

Intermittent rivers and ephemeral streams (IRES) may represent over half the global stream network, but their contribution to respiration and carbon dioxide (CO2) emissions is largely undetermined. In particular, little is known about the variability and drivers of respiration in IRES sediments upon rewetting, which could result in large pulses of CO2. We present a global study examining sediments from 200 dry IRES reaches spanning multiple biomes. Results from standardized assays show that mean respiration increased 32‐fold to 66‐fold upon sediment rewetting. Structural equation modeling indicates that this response was driven by sediment texture and organic matter quantity and quality, which, in turn, were influenced by climate, land use, and riparian plant cover. Our estimates suggest that respiration pulses resulting from rewetting of IRES sediments could contribute significantly to annual CO2 emissions from the global stream network, with a single respiration pulse potentially increasing emission by 0.2–0.7%. As the spatial and temporal extent of IRES increases globally, our results highlight the importance of recognizing the influence of wetting‐drying cycles on respiration and CO2 emissions in stream networks. Key Points: Sediment respiration in intermittent rivers and ephemeral streams increases substantially in response to rewettingRespiration pulses are driven by sediment properties, which, in turn, are influenced by climate and catchment characteristicsEffects of wetting‐drying cycles on respiration and CO2 emissions in stream networks need consideration in upscaling and modeling efforts [ABSTRACT FROM AUTHOR]

Published
2019
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33. Occurrence of 'Antrobathynella stammeri' (Jakobi, 1954) (Crustacea: Syncarida: Bathynellidae) in the hyporheic zones of two English karst rivers

Author

Stubbington, R, Dunscombe, MP, and Gledhill, T

Abstract

This paper reports the first records of Antrobathynella stammeri in the British Isles since 1985. Numerous individuals were observed in hyporheic water extracted from the River Skirfare (Yorkshire, UK), whilst, in an independent study, a single confirmed specimen was recorded from hyporheic water pumped from the River Lathkill (Derbyshire, UK). The latter observation is the first record of the superorder Syncarida in the Peak District and provides an important geographical link between previously recorded individuals in Scotland and north-west England and records from the south of England. These records suggest that bathynellids may be more abundant in the UK than previously thought, highlighting the need for more effective sampling of subterranean habitats to determine the conservation status of such rarely seen species.

Published
2008

36. Sediment respiration pulses in intermittent rivers and ephemeral streams

Author

von Schiller, D., Datry, T., Corti, R., Foulquier, A., Tockner, K., Marcé, R., García-Baquero, G., Odriozola, I., Obrador, B., Elosegi, A., Mendoza‐Lera, C., Gessner, M. O., Stubbington, R., Albariño, R., Allen, D. C., Altermatt, F., Arce, M. I., Arnon, S., Banas, D., Banegas‐Medina, A., Beller, E., Blanchette, Melanie L., Blanco‐Libreros, J. F., Blessing, J., Boëchat, I. G., Boersma, K. S., Bogan, M. T., Bonada, N., Bond, N. R., Brintrup, K., Bruder, A., Burrows, R. M., Cancellario, T., Carlson, S. M., Cauvy‐Fraunié, S., Cid, N., Danger, M., de Freitas Terra, B., Dehedin, A., De Girolamo, A. M., del Campo, R., Díaz‐Villanueva, V., Duerdoth, C. P., Dyer, F., Faye, E., Febria, C., Figueroa, R., Four, B., Gafny, S., Gómez, R., Gómez‐Gener, L., Graça, M. A. S., Guareschi, S., Gücker, B., Hoppeler, F., Hwan, J. L., Kubheka, S., Laini, A., Langhans, S. D., Leigh, C., Little, C. J., Lorenz, S., Marshall, J., Martín, E. J., McIntosh, A., Meyer, E. I., Miliša, M., Mlambo, M. C., Moleón, M., Morais, M., Negus, P., Niyogi, D., Papatheodoulou, A., Pardo, I., Pařil, P., Pešić, V., Piscart, C., Polášek, M., Rodríguez‐Lozano, P., Rolls, R. J., Sánchez‐Montoya, M. M., Savić, A., Shumilova, O., Steward, A., Taleb, A., Uzan, A., Vander Vorste, R., Waltham, N., Woelfle‐Erskine, C., Zak, D., Zarfl, C., Zoppini, A., von Schiller, D., Datry, T., Corti, R., Foulquier, A., Tockner, K., Marcé, R., García-Baquero, G., Odriozola, I., Obrador, B., Elosegi, A., Mendoza‐Lera, C., Gessner, M. O., Stubbington, R., Albariño, R., Allen, D. C., Altermatt, F., Arce, M. I., Arnon, S., Banas, D., Banegas‐Medina, A., Beller, E., Blanchette, Melanie L., Blanco‐Libreros, J. F., Blessing, J., Boëchat, I. G., Boersma, K. S., Bogan, M. T., Bonada, N., Bond, N. R., Brintrup, K., Bruder, A., Burrows, R. M., Cancellario, T., Carlson, S. M., Cauvy‐Fraunié, S., Cid, N., Danger, M., de Freitas Terra, B., Dehedin, A., De Girolamo, A. M., del Campo, R., Díaz‐Villanueva, V., Duerdoth, C. P., Dyer, F., Faye, E., Febria, C., Figueroa, R., Four, B., Gafny, S., Gómez, R., Gómez‐Gener, L., Graça, M. A. S., Guareschi, S., Gücker, B., Hoppeler, F., Hwan, J. L., Kubheka, S., Laini, A., Langhans, S. D., Leigh, C., Little, C. J., Lorenz, S., Marshall, J., Martín, E. J., McIntosh, A., Meyer, E. I., Miliša, M., Mlambo, M. C., Moleón, M., Morais, M., Negus, P., Niyogi, D., Papatheodoulou, A., Pardo, I., Pařil, P., Pešić, V., Piscart, C., Polášek, M., Rodríguez‐Lozano, P., Rolls, R. J., Sánchez‐Montoya, M. M., Savić, A., Shumilova, O., Steward, A., Taleb, A., Uzan, A., Vander Vorste, R., Waltham, N., Woelfle‐Erskine, C., Zak, D., Zarfl, C., and Zoppini, A.

Abstract

von Schiller, D., Datry, T., Corti, R., Foulquier, A., Tockner, K., Marcé, R., ... Zoppini, A. (2019). Sediment respiration pulses in intermittent rivers and ephemeral streams. Global Biogeochemical Cycles, 33(10), 1251-1263. Available here

37. Ecosystem services and social perception

Author

Jorda-Capdevila, Dídac, Brummer, Mathias, Bruno, Daniel, Alexandre, Rui, Castanho, Antonio J. Castro, Fortuño, Pau, Jakubínský, Jiri, Kaletová, Tatiana, Kelemen, Estzer, Koundouri, Phoebe, Logar, Ivana, Loures, Louis, Mendez, Joana, Mendoza-Lera, Clara, Quintas-Soriano, Cristina, Rodríguez-Lozano, Pablo, von Schiller, Daniel, Stubbington, Rachel, Sykes, Tim, Tizzoni, Elisa, Truchy, Amélie, Tsani, Stella, Magand, C., Alves, M.H., Calleja, E., Datry, T., Dörflinger, G., England, J., Gallart, F., Gómez, R., Jorda-Capdevila, D., Marti, E., Munne, A., Pastor, V.A., Stubbington, R., Tziortzis, I., and Von Schiller, D.

Abstract

In a nutshell:▪ There is a variety of benefits that IRES provide to our societies, from the provision of materials such as water and timber, to iconic species, the regulation of biogeochemical cycles, and space for cultural manifestation and as a corridor for both wild and herded animals.▪ Drying and rewetting processes, timing and duration of different aquatic phases, have an effect on the biodiversity and ecosystem functioning, as well as on the provision of ecosystem services and on the social perception of them.▪ There are intrinsic and relational values associated to IRES that are not usually recognised, including sense of place, cultural identity, social cohesion or nature stewardship.▪ There is a long list of indicators that can be used to assess the provision of ecosystem services, and different techniques of monetary and non-monetary methods can be applied to assess their value.▪ Public participation is also necessary to understand the multiple values of IRES and to improve social perception. Participatory mapping, citizen science, and scenario planning are some of the methodologies can be employed.

Published
2020

38. Unravelling large-scale patterns and drivers of biodiversity in dry rivers.

Author

Foulquier A, Datry T, Corti R, von Schiller D, Tockner K, Stubbington R, Gessner MO, Boyer F, Ohlmann M, Thuiller W, Rioux D, Miquel C, Albariño R, Allen DC, Altermatt F, Arce MI, Arnon S, Banas D, Banegas-Medina A, Beller E, Blanchette ML, Blessing J, Boëchat IG, Boersma K, Bogan M, Bonada N, Bond N, Brintrup K, Bruder A, Burrows R, Cancellario T, Canhoto C, Carlson S, Cid N, Cornut J, Danger M, de Freitas Terra B, De Girolamo AM, Del Campo R, Díaz Villanueva V, Dyer F, Elosegi A, Febria C, Figueroa Jara R, Four B, Gafny S, Gómez R, Gómez-Gener L, Guareschi S, Gücker B, Hwan J, Jones JI, Kubheka PS, Laini A, Langhans SD, Launay B, Le Goff G, Leigh C, Little C, Lorenz S, Marshall J, Martin Sanz EJ, McIntosh A, Mendoza-Lera C, Meyer EI, Miliša M, Mlambo MC, Morais M, Moya N, Negus P, Niyogi D, Pagán I, Papatheodoulou A, Pappagallo G, Pardo I, Pařil P, Pauls SU, Polášek M, Rodríguez-Lozano P, Rolls RJ, Sánchez-Montoya MM, Savić A, Shumilova O, Sridhar KR, Steward A, Taleb A, Uzan A, Valladares Y, Vander Vorste R, Waltham NJ, Zak DH, and Zoppini A

Subjects
Animals, Fungi classification, Fungi genetics, Geologic Sediments microbiology, Bacteria classification, Bacteria genetics, Invertebrates classification, DNA Barcoding, Taxonomic, Plants classification, Archaea classification, Archaea genetics, Biodiversity, Rivers microbiology
Abstract

More than half of the world's rivers dry up periodically, but our understanding of the biological communities in dry riverbeds remains limited. Specifically, the roles of dispersal, environmental filtering and biotic interactions in driving biodiversity in dry rivers are poorly understood. Here, we conduct a large-scale coordinated survey of patterns and drivers of biodiversity in dry riverbeds. We focus on eight major taxa, including microorganisms, invertebrates and plants: Algae, Archaea, Bacteria, Fungi, Protozoa, Arthropods, Nematodes and Streptophyta. We use environmental DNA metabarcoding to assess biodiversity in dry sediments collected over a 1-year period from 84 non-perennial rivers across 19 countries on four continents. Both direct factors, such as nutrient and carbon availability, and indirect factors such as climate influence the local biodiversity of most taxa. Limited resource availability and prolonged dry phases favor oligotrophic microbial taxa. Co-variation among taxa, particularly Bacteria, Fungi, Algae and Protozoa, explain more spatial variation in community composition than dispersal or environmental gradients. This finding suggests that biotic interactions or unmeasured ecological and evolutionary factors may strongly influence communities during dry phases, altering biodiversity responses to global changes., (© 2024. The Author(s).)

Published
2024
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39. Time series of freshwater macroinvertebrate abundances and site characteristics of European streams and rivers.

Author

Welti EAR, Bowler DE, Sinclair JS, Altermatt F, Álvarez-Cabria M, Amatulli G, Angeler DG, Archambaud G, Arrate Jorrín I, Aspin T, Azpiroz I, Baker NJ, Bañares I, Barquín Ortiz J, Bodin CL, Bonacina L, Bonada N, Bottarin R, Cañedo-Argüelles M, Csabai Z, Datry T, de Eyto E, Dohet A, Domisch S, Dörflinger G, Drohan E, Eikland KA, England J, Eriksen TE, Evtimova V, Feio MJ, Ferréol M, Floury M, Forcellini M, Forio MAE, Fornaroli R, Friberg N, Fruget JF, Garcia Marquez JR, Georgieva G, Goethals P, Graça MAS, House A, Huttunen KL, Jensen TC, Johnson RK, Jones JI, Kiesel J, Larrañaga A, Leitner P, L'Hoste L, Lizée MH, Lorenz AW, Maire A, Manzanos Arnaiz JA, Mckie B, Millán A, Muotka T, Murphy JF, Ozolins D, Paavola R, Paril P, Peñas Silva FJ, Polasek M, Rasmussen J, Rubio M, Sánchez Fernández D, Sandin L, Schäfer RB, Schmidt-Kloiber A, Scotti A, Shen LQ, Skuja A, Stoll S, Straka M, Stubbington R, Timm H, Tyufekchieva VG, Tziortzis I, Uzunov Y, van der Lee GH, Vannevel R, Varadinova E, Várbíró G, Velle G, Verdonschot PFM, Verdonschot RCM, Vidinova Y, Wiberg-Larsen P, and Haase P

Subjects
Animals, Europe, Fresh Water, Population Dynamics, Water Quality, Biodiversity, Ecosystem, Invertebrates, Rivers
Abstract

Freshwater macroinvertebrates are a diverse group and play key ecological roles, including accelerating nutrient cycling, filtering water, controlling primary producers, and providing food for predators. Their differences in tolerances and short generation times manifest in rapid community responses to change. Macroinvertebrate community composition is an indicator of water quality. In Europe, efforts to improve water quality following environmental legislation, primarily starting in the 1980s, may have driven a recovery of macroinvertebrate communities. Towards understanding temporal and spatial variation of these organisms, we compiled the TREAM dataset (Time seRies of European freshwAter Macroinvertebrates), consisting of macroinvertebrate community time series from 1,816 river and stream sites (mean length of 19.2 years and 14.9 sampling years) of 22 European countries sampled between 1968 and 2020. In total, the data include >93 million sampled individuals of 2,648 taxa from 959 genera and 212 families. These data can be used to test questions ranging from identifying drivers of the population dynamics of specific taxa to assessing the success of legislative and management restoration efforts., (© 2024. The Author(s).)

Published
2024
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40. Multi-decadal improvements in the ecological quality of European rivers are not consistently reflected in biodiversity metrics.

Author

Sinclair JS, Welti EAR, Altermatt F, Álvarez-Cabria M, Aroviita J, Baker NJ, Barešová L, Barquín J, Bonacina L, Bonada N, Cañedo-Argüelles M, Csabai Z, de Eyto E, Dohet A, Dörflinger G, Eriksen TE, Evtimova V, Feio MJ, Ferréol M, Floury M, Forio MAE, Fornaroli R, Goethals PLM, Heino J, Hering D, Huttunen KL, Jähnig SC, Johnson RK, Kuglerová L, Kupilas B, L'Hoste L, Larrañaga A, Leitner P, Lorenz AW, McKie BG, Muotka T, Osadčaja D, Paavola R, Palinauskas V, Pařil P, Pilotto F, Polášek M, Rasmussen JJ, Schäfer RB, Schmidt-Kloiber A, Scotti A, Skuja A, Straka M, Stubbington R, Timm H, Tyufekchieva V, Tziortzis I, Vannevel R, Várbíró G, Velle G, Verdonschot RCM, Vray S, and Haase P

Subjects
Animals, Humans, Invertebrates, Rivers, Europe, Ecosystem, Biodiversity
Abstract

Humans impact terrestrial, marine and freshwater ecosystems, yet many broad-scale studies have found no systematic, negative biodiversity changes (for example, decreasing abundance or taxon richness). Here we show that mixed biodiversity responses may arise because community metrics show variable responses to anthropogenic impacts across broad spatial scales. We first quantified temporal trends in anthropogenic impacts for 1,365 riverine invertebrate communities from 23 European countries, based on similarity to least-impacted reference communities. Reference comparisons provide necessary, but often missing, baselines for evaluating whether communities are negatively impacted or have improved (less or more similar, respectively). We then determined whether changing impacts were consistently reflected in metrics of community abundance, taxon richness, evenness and composition. Invertebrate communities improved, that is, became more similar to reference conditions, from 1992 until the 2010s, after which improvements plateaued. Improvements were generally reflected by higher taxon richness, providing evidence that certain community metrics can broadly indicate anthropogenic impacts. However, richness responses were highly variable among sites, and we found no consistent responses in community abundance, evenness or composition. These findings suggest that, without sufficient data and careful metric selection, many common community metrics cannot reliably reflect anthropogenic impacts, helping explain the prevalence of mixed biodiversity trends., (© 2024. The Author(s), under exclusive licence to Springer Nature Limited.)

Published
2024
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41. Non-perennial segments in river networks.

Author

Datry T, Boulton AJ, Fritz K, Stubbington R, Cid N, Crabot J, and Tockner K

Abstract

Non-perennial river segments - those that recurrently cease to flow or frequently dry - occur in all river networks and are globally more abundant than perennial (always flowing) segments. However, research and management have historically focused on perennial river segments. In this Review, we outline how non-perennial segments are integral parts of river networks. Repeated cycles of flowing, non-flowing and dry phases in non-perennial segments influence biodiversity and ecosystem dynamics at different spatial scales, from individual segments to entire river networks. Varying configurations of perennial and non-perennial segments govern physical, chemical and ecological responses to changes in the flow regimes of each river network, especially in response to human activities. The extent of non-perennial segments in river networks has increased owing to warming, changing hydrological patterns and human activities, and this increase is predicted to continue. Moreover, the dry phases of flow regimes are expected to be longer, drier and more frequent, albeit with high regional variability. These changes will likely impact biodiversity, potentially tipping some ecosystems to compromised stable states. Effective river-network management must recognize ecosystem services (such as flood risk management and groundwater recharge) provided by non-perennial segments and ensure their legislative and regulatory protection, which is often lacking., Competing Interests: Competing interests The authors declare no competing interests.

Published
2023
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42. The recovery of European freshwater biodiversity has come to a halt.

Author

Haase P, Bowler DE, Baker NJ, Bonada N, Domisch S, Garcia Marquez JR, Heino J, Hering D, Jähnig SC, Schmidt-Kloiber A, Stubbington R, Altermatt F, Álvarez-Cabria M, Amatulli G, Angeler DG, Archambaud-Suard G, Jorrín IA, Aspin T, Azpiroz I, Bañares I, Ortiz JB, Bodin CL, Bonacina L, Bottarin R, Cañedo-Argüelles M, Csabai Z, Datry T, de Eyto E, Dohet A, Dörflinger G, Drohan E, Eikland KA, England J, Eriksen TE, Evtimova V, Feio MJ, Ferréol M, Floury M, Forcellini M, Forio MAE, Fornaroli R, Friberg N, Fruget JF, Georgieva G, Goethals P, Graça MAS, Graf W, House A, Huttunen KL, Jensen TC, Johnson RK, Jones JI, Kiesel J, Kuglerová L, Larrañaga A, Leitner P, L'Hoste L, Lizée MH, Lorenz AW, Maire A, Arnaiz JAM, McKie BG, Millán A, Monteith D, Muotka T, Murphy JF, Ozolins D, Paavola R, Paril P, Peñas FJ, Pilotto F, Polášek M, Rasmussen JJ, Rubio M, Sánchez-Fernández D, Sandin L, Schäfer RB, Scotti A, Shen LQ, Skuja A, Stoll S, Straka M, Timm H, Tyufekchieva VG, Tziortzis I, Uzunov Y, van der Lee GH, Vannevel R, Varadinova E, Várbíró G, Velle G, Verdonschot PFM, Verdonschot RCM, Vidinova Y, Wiberg-Larsen P, and Welti EAR

Subjects
Animals, Introduced Species trends, Europe, Human Activities, Hydrobiology, Time Factors, Crop Production, Urbanization, Global Warming, Water Pollutants analysis, Biodiversity, Fresh Water, Invertebrates classification, Invertebrates physiology, Conservation of Water Resources statistics & numerical data, Conservation of Water Resources trends, Environmental Monitoring
Abstract

Owing to a long history of anthropogenic pressures, freshwater ecosystems are among the most vulnerable to biodiversity loss 1 . Mitigation measures, including wastewater treatment and hydromorphological restoration, have aimed to improve environmental quality and foster the recovery of freshwater biodiversity 2 . Here, using 1,816 time series of freshwater invertebrate communities collected across 22 European countries between 1968 and 2020, we quantified temporal trends in taxonomic and functional diversity and their responses to environmental pressures and gradients. We observed overall increases in taxon richness (0.73% per year), functional richness (2.4% per year) and abundance (1.17% per year). However, these increases primarily occurred before the 2010s, and have since plateaued. Freshwater communities downstream of dams, urban areas and cropland were less likely to experience recovery. Communities at sites with faster rates of warming had fewer gains in taxon richness, functional richness and abundance. Although biodiversity gains in the 1990s and 2000s probably reflect the effectiveness of water-quality improvements and restoration projects, the decelerating trajectory in the 2010s suggests that the current measures offer diminishing returns. Given new and persistent pressures on freshwater ecosystems, including emerging pollutants, climate change and the spread of invasive species, we call for additional mitigation to revive the recovery of freshwater biodiversity., (© 2023. The Author(s).)

Published
2023
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43. Invasion impacts and dynamics of a European-wide introduced species.

Author

Haubrock PJ, Ahmed DA, Cuthbert RN, Stubbington R, Domisch S, Marquez JRG, Beidas A, Amatulli G, Kiesel J, Shen LQ, Soto I, Angeler DG, Bonada N, Cañedo-Argüelles M, Csabai Z, Datry T, de Eyto E, Dohet A, Drohan E, England J, Feio MJ, Forio MAE, Goethals P, Graf W, Heino J, Hudgins EJ, Jähnig SC, Johnson RK, Larrañaga A, Leitner P, L'Hoste L, Lizee MH, Maire A, Rasmussen JJ, Schäfer RB, Schmidt-Kloiber A, Vannevel R, Várbíró G, Wiberg-Larsen P, and Haase P

Subjects
Animals, Europe, New Zealand, Snails, Ecosystem, Introduced Species
Abstract

Globalization has led to the introduction of thousands of alien species worldwide. With growing impacts by invasive species, understanding the invasion process remains critical for predicting adverse effects and informing efficient management. Theoretically, invasion dynamics have been assumed to follow an "invasion curve" (S-shaped curve of available area invaded over time), but this dynamic has lacked empirical testing using large-scale data and neglects to consider invader abundances. We propose an "impact curve" describing the impacts generated by invasive species over time based on cumulative abundances. To test this curve's large-scale applicability, we used the data-rich New Zealand mud snail Potamopyrgus antipodarum, one of the most damaging freshwater invaders that has invaded almost all of Europe. Using long-term (1979-2020) abundance and environmental data collected across 306 European sites, we observed that P. antipodarum abundance generally increased through time, with slower population growth at higher latitudes and with lower runoff depth. Fifty-nine percent of these populations followed the impact curve, characterized by first occurrence, exponential growth, then long-term saturation. This behaviour is consistent with boom-bust dynamics, as saturation occurs due to a rapid decline in abundance over time. Across sites, we estimated that impact peaked approximately two decades after first detection, but the rate of progression along the invasion process was influenced by local abiotic conditions. The S-shaped impact curve may be common among many invasive species that undergo complex invasion dynamics. This provides a potentially unifying approach to advance understanding of large-scale invasion dynamics and could inform timely management actions to mitigate impacts on ecosystems and economies., (© 2022 The Authors. Global Change Biology published by John Wiley & Sons Ltd.)

Published
2022
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44. Reconceptualizing the hyporheic zone for nonperennial rivers and streams.

Author

DelVecchia AG, Shanafield M, Zimmer MA, Busch MH, Krabbenhoft CA, Stubbington R, Kaiser KE, Burrows RM, Hosen J, Datry T, Kampf SK, Zipper SC, Fritz K, Costigan K, and Allen DC

Abstract

Nonperennial streams dominate global river networks and are increasing in occurrence across space and time. When surface flow ceases or the surface water dries, flow or moisture can be retained in the subsurface sediments of the hyporheic zone, supporting aquatic communities and ecosystem processes. However, hydrological and ecological definitions of the hyporheic zone have been developed in perennial rivers and emphasize the mixing of water and organisms, respectively, from both the surface stream and groundwater. The adaptation of such definitions to include both humid and dry unsaturated conditions could promote characterization of how hydrological and biogeochemical variability shape ecological communities within nonperennial hyporheic zones, advancing our understanding of both ecosystem structure and function in these habitats. To conceptualize hyporheic zones for nonperennial streams, we review how water sources and surface and subsurface structure influence hydrological and physicochemical conditions. We consider the extent of this zone and how biogeochemistry and ecology might vary with surface states. We then link these components to the composition of nonperennial stream communities. Next, we examine literature to identify priorities for hydrological and ecological research exploring nonperennial hyporheic zones. Lastly, by integrating hydrology, biogeochemistry, and ecology, we recommend a multidisciplinary conceptualization of the nonperennial hyporheic zone as the porous subsurface streambed sediments that shift between lotic, lentic, humid, and dry conditions in space and time to support aquatic-terrestrial biodiversity. As river drying increases in extent because of global change, we call for holistic, interdisciplinary research across the terrestrial and aquatic sciences to apply this conceptualization to characterize hyporheic zone structure and function across the full spectrum of hydrological states.

Published
2022
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45. Taxon-specific sensitivities to flow intermittence reveal macroinvertebrates as potential bioindicators of intermittent rivers and streams.

Author

Miliša M, Stubbington R, Datry T, Cid N, Bonada N, Šumanović M, and Milošević D

Subjects
Animals, Ecosystem, Environmental Monitoring, Humans, Insecta, Invertebrates, Environmental Biomarkers, Rivers
Abstract

As complex mosaics of lotic, lentic, and terrestrial habitats, intermittent rivers and ephemeral streams (IRES) support high biodiversity. Despite their ecological importance, IRES are poorly represented in routine monitoring programs, but recent recognition of their considerable-and increasing-spatiotemporal extent is motivating efforts to better represent IRES in ecological status assessments. We examine response patterns of aquatic macroinvertebrate communities and taxa to flow intermittence (FI) across three European climatic regions. We used self-organizing map (SOM) to ordinate and classify sampling sites based on community structure in regions with continental, Mediterranean and oceanic climates. The SOM passively introduced FI, quantified as the mean annual % flow, and visualized its variability across classified communities, revealing a clear association between community structure and FI in all regions. Indicator species analysis identified taxa indicative of low, intermediate and high FI. In the continental region, the amphipod Niphargus was indicative of high FI and was associated with groundwater-fed IRES, whereas indicators of Mediterranean IRES comprised Odonata, Coleoptera and Heteroptera taxa, which favor lentic conditions. In the oceanic region, taxa indicative of relatively high FI included leuctrid stoneflies and a limnephilid caddisfly, likely reflecting the colonization of IRES by aerial adults from nearby perennial reaches. The Diptera families Chironomidae and Simuliidae showed contrasting FI preferences among regions, reflecting environmental heterogeneity between regions and the coarse taxonomic resolution to which these organisms were identified. These region-specific community and taxon responses of aquatic biota to FI highlight the need to adapt standard biotic indices to enable effective ecological status assessments in IRES., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021 Elsevier B.V. All rights reserved.)

Published
2022
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46. Drought effects on invertebrate metapopulation dynamics and quasi-extinction risk in an intermittent river network.

Author

Sarremejane R, Stubbington R, England J, Sefton CEM, Eastman M, Parry S, and Ruhi A

Subjects
Animals, Ecosystem, Hydrology, Invertebrates, Droughts, Rivers
Abstract

Ecological communities can remain stable in the face of disturbance if their constituent species have different resistance and resilience strategies. In turn, local stability scales up regionally if heterogeneous landscapes maintain spatial asynchrony across discrete populations-but not if large-scale stressors synchronize environmental conditions and biological responses. Here, we hypothesized that droughts could drastically decrease the stability of invertebrate metapopulations both by filtering out poorly adapted species locally, and by synchronizing their dynamics across a river network. We tested this hypothesis via multivariate autoregressive state-space (MARSS) models on spatially replicated, long-term data describing aquatic invertebrate communities and hydrological conditions in a set of temperate, lowland streams subject to seasonal and supraseasonal drying events. This quantitative approach allowed us to assess the influence of local (flow magnitude) and network-scale (hydrological connectivity) drivers on invertebrate long-term trajectories, and to simulate near-future responses to a range of drought scenarios. We found that fluctuations in species abundances were heterogeneous across communities and driven by a combination of hydrological and stochastic drivers. Among metapopulations, increasing extent of dry reaches reduced the abundance of functional groups with low resistance or resilience capacities (i.e. low ability to persist in situ or recolonize from elsewhere, respectively). Our simulations revealed that metapopulation quasi-extinction risk for taxa vulnerable to drought increased exponentially as flowing habitats contracted within the river network, whereas the risk for taxa with resistance and resilience traits remained stable. Our results suggest that drought can be a synchronizing agent in riverscapes, potentially leading to regional quasi-extinction of species with lower resistance and resilience abilities. Better recognition of drought-driven synchronization may increase realism in species extinction forecasts as hydroclimatic extremes continue to intensify worldwide., (© 2021 John Wiley & Sons Ltd.)

Published
2021
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47. Biotic indices of hydrological variability as tools to inform dynamic ecological status assessments in river ecosystems.

Author

Theodoropoulos C, Karaouzas I, and Stubbington R

Abstract

River biomonitoring uses biotic indices that assess human-induced degradation, including pollution, by comparison with type-specific static biological reference conditions. However, index scores that indicate pollution may reflect biological responses to natural hydrological variability associated with low flows and drying, leading biomonitoring schemes to misclassify sites as degraded. To address this, dynamic, site-specific adjustments of static biological reference conditions have been proposed, but current biomonitoring tools cannot facilitate implementation of these adjustments. We analyzed 329 samples from mediterranean-climate rivers in Greece, to evaluate the use of six stressor-specific macroinvertebrate-based indices of hydrological variability (CEFI, DEHLI, ELF, LIFE, LIFENZ, MIS-index) as tools to facilitate dynamic adjustments of static biological reference conditions. We examined macroinvertebrate assemblage responses to physicochemical and land use drivers in relation to each sample's hydrological conditions, as assessed by the six indices. We evaluated index performance beyond the region of development by exploring correlations among indices, including correlations with the region-specific Greek ELF index, for which 100% of taxa were represented. We also examined the influence of inorganic nutrient pollution on index performance by comparing index scores from samples with and without nutrient pollution. Season, water temperature, agricultural land use and nutrient pollution were major drivers of macroinvertebrate assemblage composition. Indices were positively correlated but correlation strength varied considerably, driven primarily by taxonomic representation (the proportion of sampled taxa included in each index's calculation), and potentially also by differences in river types, taxonomic resolution and sampling strategies. All indices identified site-specific hydrological conditions both in the presence and absence of nutrient pollution. We recommend the development of region-specific biotic indices of hydrological variability, or regional adaptation of existing indices, to represent 100% of the regional taxa pool and thus to enable acceptable performance beyond their region of development. Such indices could inform dynamic adaptation of static biological reference conditions by assessing site-specific hydrological conditions based on a macroinvertebrate assemblage, without the collection of additional, abiotic field data. Application of our proposed approach could prevent misclassification of ecological status, thus avoiding time-demanding and costly mismanagement of rivers and streams., (Copyright © 2021 Elsevier Ltd. All rights reserved.)

Published
2021
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48. The riverine bioreactor: An integrative perspective on biological decomposition of organic matter across riverine habitats.

Author

Peralta-Maraver I, Stubbington R, Arnon S, Kratina P, Krause S, de Mello Cionek V, Leite NK, da Silva ALL, Thomaz SM, Posselt M, Milner VS, Momblanch A, Moretti MS, Nóbrega RLB, Perkins DM, Petrucio MM, Reche I, Saito V, Sarmento H, Strange E, Taniwaki RH, White J, Alves GHZ, and Robertson AL

Subjects
Bioreactors, Food Chain, Climate Change, Ecosystem
Abstract

Riverine ecosystems can be conceptualized as 'bioreactors' (the riverine bioreactor) which retain and decompose a wide range of organic substrates. The metabolic performance of the riverine bioreactor is linked to their community structure, the efficiency of energy transfer along food chains, and complex interactions among biotic and abiotic environmental factors. However, our understanding of the mechanistic functioning and capacity of the riverine bioreactor remains limited. We review the state of knowledge and outline major gaps in the understanding of biotic drivers of organic matter decomposition processes that occur in riverine ecosystems, across habitats, temporal dimensions, and latitudes influenced by climate change. We propose a novel, integrative analytical perspective to assess and predict decomposition processes in riverine ecosystems. We then use this model to analyse data to demonstrate that the size-spectra of a community can be used to predict decomposition rates by analysing an illustrative dataset. This modelling methodology allows comparison of the riverine bioreactor's performance across habitats and at a global scale. Our integrative analytical approach can be applied to advance understanding of the functioning and efficiency of the riverine bioreactor as hotspots of metabolic activity. Application of insights gained from such analyses could inform the development of strategies that promote the functioning of the riverine bioreactor across global ecosystems., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. All authors agreed on its publication in the current form., (Copyright © 2021 Elsevier B.V. All rights reserved.)

Published
2021
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49. DISPERSE, a trait database to assess the dispersal potential of European aquatic macroinvertebrates.

Author

Sarremejane R, Cid N, Stubbington R, Datry T, Alp M, Cañedo-Argüelles M, Cordero-Rivera A, Csabai Z, Gutiérrez-Cánovas C, Heino J, Forcellini M, Millán A, Paillex A, Pařil P, Polášek M, Tierno de Figueroa JM, Usseglio-Polatera P, Zamora-Muñoz C, and Bonada N

Subjects
Animals, Conservation of Natural Resources, Ecology, Environmental Monitoring, Europe, Animal Distribution, Aquatic Organisms, Invertebrates
Abstract

Dispersal is an essential process in population and community dynamics, but is difficult to measure in the field. In freshwater ecosystems, information on biological traits related to organisms' morphology, life history and behaviour provides useful dispersal proxies, but information remains scattered or unpublished for many taxa. We compiled information on multiple dispersal-related biological traits of European aquatic macroinvertebrates in a unique resource, the DISPERSE database. DISPERSE includes nine dispersal-related traits subdivided into 39 trait categories for 480 taxa, including Annelida, Mollusca, Platyhelminthes, and Arthropoda such as Crustacea and Insecta, generally at the genus level. Information within DISPERSE can be used to address fundamental research questions in metapopulation ecology, metacommunity ecology, macroecology and evolutionary ecology. Information on dispersal proxies can be applied to improve predictions of ecological responses to global change, and to inform improvements to biomonitoring, conservation and management strategies. The diverse sources used in DISPERSE complement existing trait databases by providing new information on dispersal traits, most of which would not otherwise be accessible to the scientific community.

Published
2020
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50. A Metacommunity Approach to Improve Biological Assessments in Highly Dynamic Freshwater Ecosystems.

Author

Cid N, Bonada N, Heino J, Cañedo-Argüelles M, Crabot J, Sarremejane R, Soininen J, Stubbington R, and Datry T

Abstract

Rapid shifts in biotic communities due to environmental variability challenge the detection of anthropogenic impacts by current biomonitoring programs. Metacommunity ecology has the potential to inform such programs, because it combines dispersal processes with niche-based approaches and recognizes variability in community composition. Using intermittent rivers-prevalent and highly dynamic ecosystems that sometimes dry-we develop a conceptual model to illustrate how dispersal limitation and flow intermittence influence the performance of biological indices. We produce a methodological framework integrating physical- and organismal-based dispersal measurements into predictive modeling, to inform development of dynamic ecological quality assessments. Such metacommunity-based approaches could be extended to other ecosystems and are required to underpin our capacity to monitor and protect ecosystems threatened under future environmental changes., (© The Author(s) 2020. Published by Oxford University Press on behalf of the American Institute of Biological Sciences.)

Published
2020
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