48 results on '"López Rojo, Naiara"'
Search Results
2. Global Patterns of Plant Litter Decomposition in Streams
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Boyero, Luz, Gessner, Mark O., Pearson, Richard G., Chauvet, Eric, Pérez, Javier, Tiegs, Scott D., Tonin, Alan M., Correa-Araneda, Francisco, López-Rojo, Naiara, Graça, Manuel A. S., Swan, Christopher M., editor, Boyero, Luz, editor, and Canhoto, Cristina, editor
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- 2021
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3. Effects of gamma irradiation on instream leaf litter decomposition
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Boyero, Luz, López-Rojo, Naiara, Pérez, Javier, Tonin, Alan M., Correa-Araneda, Francisco, Davis, Aaron, and Pearson, Richard G.
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- 2021
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4. Drying and fragmentation drive the dynamics of resources, consumers and ecosystem functions across aquatic‐terrestrial habitats in a river network
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Sarremejane, Romain, primary, Silverthorn, Teresa, additional, Arbaretaz, Angélique, additional, Truchy, Amélie, additional, Barthélémy, Nans, additional, López‐Rojo, Naiara, additional, Foulquier, Arnaud, additional, Simon, Laurent, additional, Pella, Hervé, additional, Singer, Gabriel, additional, and Datry, Thibault, additional
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- 2024
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5. Loss of Key Riparian Plant Species Impacts Stream Ecosystem Functioning
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Alonso, Alberto, Pérez, Javier, Monroy, Silvia, López-Rojo, Naiara, Basaguren, Ana, Bosch, Jaime, and Boyero, Luz
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- 2021
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6. Plant diversity loss affects stream ecosystem multifunctionality
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López-Rojo, Naiara, Pozo, Jesús, Pérez, Javier, Basaguren, Ana, Martínez, Aingeru, Tonin, Alan M., Correa-Araneda, Francisco, and Boyero, Luz
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- 2019
7. A common fungicide impairs stream ecosystem functioning through effects on aquatic hyphomycetes and detritivorous caddisflies
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Cornejo, Aydeé, Pérez, Javier, Alonso, Alberto, López-Rojo, Naiara, Monroy, Silvia, and Boyero, Luz
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- 2020
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8. Shifts in Key Leaf Litter Traits Can Predict Effects of Plant Diversity Loss on Decomposition in Streams
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López-Rojo, Naiara, Pérez, Javier, Pozo, Jesús, Basaguren, Ana, Apodaka-Etxebarria, Unai, Correa-Araneda, Francisco, and Boyero, Luz
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- 2021
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9. Microplastics increase susceptibility of amphibian larvae to the chytrid fungus Batrachochytrium dendrobatidis
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Bosch, Jaime, Thumsová, Barbora, López-Rojo, Naiara, Pérez, Javier, Alonso, Alberto, Fisher, Matthew C., and Boyero, Luz
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- 2021
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10. Impacts of detritivore diversity loss on instream decomposition are greatest in the tropics
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Boyero, Luz, López-Rojo, Naiara, Tonin, Alan M., Pérez, Javier, Correa-Araneda, Francisco, Pearson, Richard G., Bosch, Jaime, Albariño, Ricardo J., Anbalagan, Sankarappan, Barmuta, Leon A., Basaguren, Ana, Burdon, Francis J., Caliman, Adriano, Callisto, Marcos, Calor, Adolfo R., Campbell, Ian C., Cardinale, Bradley J., Jesús Casas, J., Chará-Serna, Ana M., Chauvet, Eric, Ciapała, Szymon, Colón-Gaud, Checo, Cornejo, Aydeé, Davis, Aaron M., Degebrodt, Monika, Dias, Emerson S., Díaz, María E., Douglas, Michael M., Encalada, Andrea C., Figueroa, Ricardo, Flecker, Alexander S., Fleituch, Tadeusz, García, Erica A., García, Gabriela, García, Pavel E., Gessner, Mark O., Gómez, Jesús E., Gómez, Sergio, Gonçalves, Jr, Jose F., Graça, Manuel A. S., Gwinn, Daniel C., Hall, Jr, Robert O., Hamada, Neusa, Hui, Cang, Imazawa, Daichi, Iwata, Tomoya, Kariuki, Samuel K., Landeira-Dabarca, Andrea, Laymon, Kelsey, Leal, María, Marchant, Richard, Martins, Renato T., Masese, Frank O., Maul, Megan, McKie, Brendan G., Medeiros, Adriana O., Erimba, Charles M. M’, Middleton, Jen A., Monroy, Silvia, Muotka, Timo, Negishi, Junjiro N., Ramírez, Alonso, Richardson, John S., Rincón, José, Rubio-Ríos, Juan, dos Santos, Gisele M., Sarremejane, Romain, Sheldon, Fran, Sitati, Augustine, Tenkiano, Nathalie S. D., Tiegs, Scott D., Tolod, Janine R., Venarsky, Michael, Watson, Anne, and Yule, Catherine M.
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- 2021
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11. River network‐scale drying impacts the spatiotemporal dynamics of greenhouse gas fluxes.
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Silverthorn, Teresa, López‐Rojo, Naiara, Sarremejane, Romain, Foulquier, Arnaud, Chanudet, Vincent, Azougui, Abdelkader, del Campo, Rubén, Singer, Gabriel, and Datry, Thibault
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GAS dynamics , *GREENHOUSE gases , *CARBON dioxide , *BIOGEOCHEMICAL cycles , *NITROUS oxide , *RIPARIAN areas , *ADAPTIVE fuzzy control , *SCALE-free network (Statistical physics) - Abstract
Rivers significantly contribute to global biogeochemical cycles; however, we have a limited understanding of how drying may influence these cycles. Drying fragments river networks, thereby influencing important ecosystem functions such as the processing of carbon and nitrogen, and associated fluxes of greenhouse gases (GHGs) both locally, and at the river network scale. Our objective was to assess, using a network‐scale approach, the lateral, longitudinal, and temporal dynamics of GHG fluxes in a river network naturally fragmented by drying. We used a closed‐loop chamber with automated analyzers to measure carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) fluxes from dry sediments, flowing waters, isolated pools, and riparian soils, along with a suite of environmental variables, over 9 months at 20 sites across a non‐perennial river network in France. Network‐scale drying had a spatial and temporal legacy effect on GHG fluxes. On average, CO2 fluxes were up to 29 times higher from perennial than non‐perennial sites under flowing conditions. At non‐perennial sites, CO2 and N2O fluxes positively covaried with time since rewetting. In addition, CO2 and N2O fluxes at perennial sites positively covaried with the percent of non‐perennial reaches upstream, indicating a spatial effect of drying. GHG fluxes from riparian soil and dry riverbed sediments had markedly different magnitudes and covariates. This research demonstrates that drying not only has a local‐scale impact but also influences GHG fluxes at the network scale, contributing valuable insights for upscaling global riverine GHG estimates. [ABSTRACT FROM AUTHOR]
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- 2024
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12. Greenhouse gas dynamics in river networks fragmented by drying and damming
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Silverthorn, Teresa, primary, López‐Rojo, Naiara, additional, Foulquier, Arnaud, additional, Chanudet, Vincent, additional, and Datry, Thibault, additional
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- 2023
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13. Temperature and organic matter quantity drive CO2 and CH4 fluxes in isolated pools of non-perennial rivers
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Silverthorn, Teresa, primary, Azougui, Abdelkader, additional, López-Rojo, Naiara, additional, Colas, Fanny, additional, Chanudet, Vincent, additional, and Datry, Thibault, additional
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- 2023
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14. Effects of two measures of riparian plant biodiversity on litter decomposition and associated processes in stream microcosms
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López-Rojo, Naiara, Pérez, Javier, Basaguren, Ana, Pozo, Jesús, Rubio-Ríos, Juan, Casas, J. Jesús, and Boyero, Luz
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- 2020
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15. Functional consequences of alder and oak loss in stream ecosystems
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Alonso, Alberto, primary, López‐Rojo, Naiara, additional, Pérez, Javier, additional, and Boyero, Luz, additional
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- 2022
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16. No evidence of biodiversity effects on stream ecosystem functioning across green and brown food web pathways
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Biología vegetal y ecología, Landaren biologia eta ekologia, López Rojo, Naiara, Boyero González, María Luz, Pérez Viñuela, Javier, Basaguren del Campo, Ana Luisa, Cardinale, Bradley J., Biología vegetal y ecología, Landaren biologia eta ekologia, López Rojo, Naiara, Boyero González, María Luz, Pérez Viñuela, Javier, Basaguren del Campo, Ana Luisa, and Cardinale, Bradley J.
- Abstract
[EN] Biodiversity loss is known to affect the two fundamental and opposite processes controlling carbon and nutrient cycles globally, that is, primary production and decomposition, which are driven by green and brown food web compartments, respectively. However, biodiversity in these two food web compartments has been mostly studied independently, and potential reciprocal effects of biodiversity loss on ecosystem processes remain unclear. We conducted a 35-day stream mesocosm experiment with two levels of algal diversity (natural and diluted periphyton communities) and three levels of litter diversity (no litter, monocultures of poplar, maple, and oak, and the three-spp. mixture) to simulate changes in biodiversity in both the green and brown pathways of an aquatic food web. We then measured multiple ecosystem processes pertaining to carbon cycling. We predicted that algal diversity would enhance decomposition and sporulation of fungal decomposers, while litter diversity would enhance algal growth and net primary production, due to the more diverse algal exudates or litter nutrients being released from more diverse mixtures. In contrast to this hypothesis, we only found biodiversity effects on an ecosystem process within the green pathway: there was a relationship between algal diversity and biofilm carrying capacity. Nevertheless, we found that this relationship was affected by the presence or absence of litter (algal diversity increased the carrying capacity in presence of litter and decreased it in its absence), which also influenced the algal community structure. Our mesocosm experiment did not evidence relationships between biodiversity and ecosystem processes across different food web compartments, but further studies in more realistic conditions would be necessary to confirm this result. If supported, the lack of biodiversity-ecosystem functioning relationships across compartments would facilitate the prediction of the impacts of biodiversity loss on ecosyste
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- 2022
17. No evidence of biodiversity effects on stream ecosystem functioning across green and brown food web pathways
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López‐Rojo, Naiara, primary, Boyero, Luz, additional, Pérez, Javier, additional, Basaguren, Ana, additional, and Cardinale, Bradley J., additional
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- 2022
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18. Litter decomposition can be reduced by pesticide effects on detritivores and decomposers: Implications for tropical stream functioning
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Cornejo, Aydeé, primary, Pérez, Javier, additional, López-Rojo, Naiara, additional, García, Gabriela, additional, Pérez, Edgar, additional, Guerra, Alisson, additional, Nieto, Carlos, additional, and Boyero, Luz, additional
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- 2021
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19. Latitude dictates plant diversity effects on instream decomposition
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Boyero, Luz, Pérez, Javier, López-Rojo, Naiara, Tonin, Alan M., and Swan, Christopher M.
- Abstract
Luz Boyero1,2,*, View ORCID ProfileJavier Pérez1, View ORCID ProfileNaiara López-Rojo1, View ORCID ProfileAlan M. Tonin3, View ORCID ProfileFrancisco Correa-Araneda4, View ORCID ProfileRichard G. Pearson5,6, View ORCID ProfileJaime Bosch7,8, Ricardo J. Albariño9, View ORCID ProfileSankarappan Anbalagan10, View ORCID ProfileLeon A. Barmuta11, View ORCID ProfileLeah Beesley12, View ORCID ProfileFrancis J. Burdon13, View ORCID ProfileAdriano Caliman14, View ORCID ProfileMarcos Callisto15, Ian C. Campbell16, Bradley J. Cardinale17, View ORCID ProfileJ. Jesús Casas18, View ORCID ProfileAna M. Chará-Serna19,20, Szymon Ciapała21, View ORCID ProfileEric Chauvet22, Checo Colón-Gaud23, View ORCID ProfileAydeé Cornejo24, View ORCID ProfileAaron M. Davis5, Monika Degebrodt25, Emerson S. Dias14, View ORCID ProfileMaría E. Díaz26, Michael M. Douglas27, View ORCID ProfileArturo Elosegi1, View ORCID ProfileAndrea C. Encalada28, View ORCID ProfileElvira de Eyto29, View ORCID ProfileRicardo Figueroa30, View ORCID ProfileAlexander S. Flecker31, View ORCID ProfileTadeusz Fleituch32, View ORCID ProfileAndré Frainer33,34, View ORCID ProfileJuliana S. França35, Erica A. García36, View ORCID ProfileGabriela García37, View ORCID ProfilePavel García38,39, View ORCID ProfileMark O. Gessner25,40, Paul S. Giller41, Jesús E. Gómez42, Sergio Gómez31, Jose F. Gonçalves Jr.3, View ORCID ProfileManuel A. S. Graça43, Robert O. Hall Jr.44, View ORCID ProfileNeusa Hamada45, View ORCID ProfileLuiz U. Hepp46, Cang Hui47,48, View ORCID ProfileDaichi Imazawa49, Tomoya Iwata50, Edson S. A. Junior51, Samuel Kariuki52, Andrea Landeira-Dabarca43,53, María Leal54, View ORCID ProfileKaisa Lehosmaa55, Charles M’Erimba52, Richard Marchant56, View ORCID ProfileRenato T. Martins45, View ORCID ProfileFrank O. Masese57, View ORCID ProfileMegan Camden58, View ORCID ProfileBrendan G. McKie13, Adriana O. Medeiros51, View ORCID ProfileJen A. Middleton12, Timo Muotka55, Junjiro N. Negishi59, Jesús Pozo1, View ORCID ProfileAlonso Ramírez60, View ORCID ProfileRenan S. Rezende61, View ORCID ProfileJohn S. Richardson62, José Rincón54, View ORCID ProfileJuan Rubio-Ríos18, Claudia Serrano29, Angela R. Shaffer23, View ORCID ProfileFran Sheldon63, Christopher M. Swan64, Nathalie S. D. Tenkiano65, View ORCID ProfileScott D. Tiegs58, Janine R. Tolod66, Michael Vernasky63, View ORCID ProfileAnne Watson11, Mourine J. Yegon57 and View ORCID ProfileCatherine M. Yule67, Running waters contribute substantially to global carbon fluxes through decomposition of terrestrial plant litter by aquatic microorganisms and detritivores. Diversity of this litter may influence instream decomposition globally in ways that are not yet understood. We investigated latitudinal differences in decomposition of litter mixtures of low and high functional diversity in 40 streams on 6 continents and spanning 113° of latitude. Despite important variability in our dataset, we found latitudinal differences in the effect of litter functional diversity on decomposition, which we explained as evolutionary adaptations of litter-consuming detritivores to resource availability. Specifically, a balanced diet effect appears to operate at lower latitudes versus a resource concentration effect at higher latitudes. The latitudinal pattern indicates that loss of plant functional diversity will have different consequences on carbon fluxes across the globe, with greater repercussions likely at low latitudes.
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- 2021
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20. Latitude dictates plant diversity effects on instream decomposition
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Boyero, Luis, Pérez, Javier, López-Rojo, Naiara, Tonin, Alan M., Correa-Araneda, Francisco, Pearson, Richard G., Bosch, Jaime, Eusko Jaurlaritza, European Commission, and Fundação para a Ciência e a Tecnologia (Portugal)
- Abstract
Running waters contribute substantially to global carbon fluxes through decomposition of terrestrial plant litter by aquatic microorganisms and detritivores. Diversity of this litter may influence instream decomposition globally in ways that are not yet understood. We investigated latitudinal differences in decomposition of litter mixtures of low and high functional diversity in 40 streams on 6 continents and spanning 113° of latitude. Despite important variability in our dataset, we found latitudinal differences in the effect of litter functional diversity on decomposition, which we explained as evolutionary adaptations of litter-consuming detritivores to resource availability. Specifically, a balanced diet effect appears to operate at lower latitudes versus a resource concentration effect at higher latitudes. The latitudinal pattern indicates that loss of plant functional diversity will have different consequences on carbon fluxes across the globe, with greater repercussions likely at low latitudes., This study was part of the DecoDiv project conducted by the GLoBE network (www.globenetwork.es), which is coordinated by L.B. Most research was based on crowdfunding (details on specific funding sources at each region are given in the Supplementary Materials). Project coordination was funded by Basque Government funds (ref. IT951-16) to the Stream Ecology Group (UPV/EHU, Spain). Litter trait analyses were funded by the 2014–2020 Operational Programme FEDER Andalusia, Spain (ref. UAL18-RNM-B006-B to J.J.C.) and the Portuguese Science Foundation, Portugal (ref. UIDB/04292/2020 to MARE).
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- 2021
- Full Text
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21. Microplastics increase susceptibility of amphibian larvae to the chytrid fungus Batrachochytrium dendrobatidis
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Biología vegetal y ecología, Landaren biologia eta ekologia, Bosch, Jaime, Thumsová, Barbora, López Rojo, Naiara, Pérez Viñuela, Javier, Alonso Blanco, Alberto, Fisher, Matthew C., Boyero González, María Luz, Biología vegetal y ecología, Landaren biologia eta ekologia, Bosch, Jaime, Thumsová, Barbora, López Rojo, Naiara, Pérez Viñuela, Javier, Alonso Blanco, Alberto, Fisher, Matthew C., and Boyero González, María Luz
- Abstract
[EN]Microplastics (MPs), a new class of pollutants that pose a threat to aquatic biodiversity, are of increasing global concern. In tandem, the amphibian chytrid fungus Batrachochytrium dendrobatidis (Bd) causing the disease chytridiomycosis is emerging worldwide as a major stressor to amphibians. We here assess whether synergies exist between this infectious disease and MP pollution by mimicking natural contact of a highly susceptible species (midwife toads, Alytes obstetricans) with a Bd-infected reservoir species (fire salamanders, Salamandra salamandra) in the presence and absence of MPs. We found that MP ingestion increases the burden of infection by Bd in a dose-dependent manner. However, MPs accumulated to a greater extent in amphibians that were not exposed to Bd, likely due to Bd-damaged tadpole mouthparts interfering with MP ingestion. Our experimental approach showed compelling interactions between two emergent processes, chytridiomycosis and MP pollution, necessitating further research into potential synergies between these biotic and abiotic threats to amphibians.
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- 2021
22. Effects of gamma irradiation on instream leaf litter decomposition
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Biología vegetal y ecología, Landaren biologia eta ekologia, Boyero González, María Luz, López Rojo, Naiara, Pérez Viñuela, Javier, Tonin, Alan M., Correa Araneda, Francisco, Davis, Aaron M., Pearson, Richard G., Biología vegetal y ecología, Landaren biologia eta ekologia, Boyero González, María Luz, López Rojo, Naiara, Pérez Viñuela, Javier, Tonin, Alan M., Correa Araneda, Francisco, Davis, Aaron M., and Pearson, Richard G.
- Abstract
[EN]Leaf litter decomposition is a key process in stream ecosystems, the rates of which can vary with changes in litter quality or its colonization by microorganisms. Decomposition in streams is increasingly used to compare ecosystem functioning globally, often requiring the distribution of litter across countries. It is important to understand whether litter sterilization, which is required by some countries, can alter the rates of decomposition and associated processes. We examined whether litter sterilization with gamma irradiation (25 kGy) influenced decomposition rates, litter stoichiometry, and colonization by invertebrates after weeks of instream incubation within coarse-mesh and fine-mesh litterbags. We used nine plant species from three families that varied widely in litter chemistry but found mostly consistent responses, with no differences in decomposition rates or numbers of invertebrates found at the end of the incubation period. However, litter stoichiometry differed between irradiated and control litter, with greater nutrient losses (mostly phosphorus) in the former. Therefore, the effects of irradiation on litter chemistry should be taken into account in studies focused on stoichiometry but not necessarily in those focused on decomposition rates, at least within the experimental timescale considered here.
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- 2021
23. Key plant species and detritivores drive diversity effects on instream leaf litter decomposition more than functional diversity: A microcosm study
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Biología vegetal y ecología, Landaren biologia eta ekologia, Rubio-Ríos, J., Pérez Viñuela, Javier, Salinas, M.J., Fenoy, E., López Rojo, Naiara, Boyero González, María Luz, Casas, J.J., Biología vegetal y ecología, Landaren biologia eta ekologia, Rubio-Ríos, J., Pérez Viñuela, Javier, Salinas, M.J., Fenoy, E., López Rojo, Naiara, Boyero González, María Luz, and Casas, J.J.
- Abstract
Anthropogenic impacts on freshwater ecosystems cause critical losses of biodiversity that can in turn impair key processes such as decomposition and nutrient cycling. Forest streams are mainly subsidized by terrestrial organic detritus, so their functioning and conservation status can be altered by changes in forest biodiversity and composition, particularly if these changes involve the replacement of functional groups or the loss of key species. We examined this issue using a microcosm experiment where we manipulated plant functional diversity (FD) (monocultures and low-FD and high-FD mixtures, resulting from different combinations of deciduous and evergreen Quercus species) and the presence of a key species (Alnus glutinosa), all in presence and absence of detritivores, and assessed effects on litter decomposition, nutrient cycling, and fungal and detritivore biomass. We found (i) positive diversity effects on detritivore-mediated decomposition, litter nutrient losses and detritivore biomass exclusively when A. glutinosa was present; and (ii) negative effects on the same processes when microbially mediated and on fungal biomass. Most positive trends could be explained by the higher litter palatability and litter trait variability obtained with the inclusion of alder leaves in the mixture. Our results support the hypothesis of a consistent slowing down of the decomposition process as a result of plant biodiversity loss, and hence effects on stream ecosystem functioning, especially when a key (N-fixing) species is lost; and underscore the importance of detritivores as drivers of plant diversity effects in the studied ecosystem processes.
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- 2021
24. Impacts of Detritivore Diversity Loss on Instream Decomposition Are Greatest in the Tropics
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Biología vegetal y ecología, Landaren biologia eta ekologia, Boyero González, María Luz, López Rojo, Naiara, Tonin, Alan M., Pérez Viñuela, Javier, Correa Araneda, Francisco, Pearson, Richard G., Bosch, Jaime, Albariño, Ricardo J., Anbalagan, Sankarappan, Barmuta, Leon A., Basaguren del Campo, Ana Luisa, Burdon, Francis J., Caliman, Adriano, Callisto, Marcos, Calor, Adolfo R., Campbell, Ian C., Cardinale, Bradley J., Casas Jiménez, José Jesús, Chara Serna, Ana M., Chauvet, Eric, Ciapala, Szymon, Colón-Gaud, Checo, Cornejo, Aydeé, Davis, Aaron M., Degebrodt, Monika, Dias, Emerson S., Díaz, María E., Douglas, Michael M., Encalada, Andrea C., Figueroa, Ricardo, Flecker, Alexander S., Fleituch, Tadeusz, García, Erica A., García, Gabriela, García, Pavel E., Gessner, Mark O., Gómez, Jesús E., Gómez, Sergio, Gonçalves Jr., José F., Graça, Manuel A. S., Gwinn, Daniel C., Hall Jr., Robert O., Hamada, Neusa, Hui, Cang, Imazawa, Daichi, Iwata, Tomoya, Kariuki, Samuel, Landeira-Dabarca, Andrea, Laymon, Kelsey, Leal, María, Marchant, Richard, Martins, Renato T., Masese, Frank O., Maul, Megan, McKie, Brendan G., Medeiros, Adriana O., M'Erimba, Charles, Middleton, Jen A., Monroy Zarzuelo, Silvia, Muotka, Timo, Negishi, Junjiro N., Ramírez, Alonso, Richardson, John S., Rincón, José, Rubio Ríos, Juan, Dos Santos, Gisele M., Sarremejane, Romain, Sheldon, Fran, Sitati, Augustine, Tenkiano, Nathalie S. D., Tiegs, Scott D., Tolod, Janine R., Venarsky, Michael, Watson, Anne, Yule, Catherine M., Biología vegetal y ecología, Landaren biologia eta ekologia, Boyero González, María Luz, López Rojo, Naiara, Tonin, Alan M., Pérez Viñuela, Javier, Correa Araneda, Francisco, Pearson, Richard G., Bosch, Jaime, Albariño, Ricardo J., Anbalagan, Sankarappan, Barmuta, Leon A., Basaguren del Campo, Ana Luisa, Burdon, Francis J., Caliman, Adriano, Callisto, Marcos, Calor, Adolfo R., Campbell, Ian C., Cardinale, Bradley J., Casas Jiménez, José Jesús, Chara Serna, Ana M., Chauvet, Eric, Ciapala, Szymon, Colón-Gaud, Checo, Cornejo, Aydeé, Davis, Aaron M., Degebrodt, Monika, Dias, Emerson S., Díaz, María E., Douglas, Michael M., Encalada, Andrea C., Figueroa, Ricardo, Flecker, Alexander S., Fleituch, Tadeusz, García, Erica A., García, Gabriela, García, Pavel E., Gessner, Mark O., Gómez, Jesús E., Gómez, Sergio, Gonçalves Jr., José F., Graça, Manuel A. S., Gwinn, Daniel C., Hall Jr., Robert O., Hamada, Neusa, Hui, Cang, Imazawa, Daichi, Iwata, Tomoya, Kariuki, Samuel, Landeira-Dabarca, Andrea, Laymon, Kelsey, Leal, María, Marchant, Richard, Martins, Renato T., Masese, Frank O., Maul, Megan, McKie, Brendan G., Medeiros, Adriana O., M'Erimba, Charles, Middleton, Jen A., Monroy Zarzuelo, Silvia, Muotka, Timo, Negishi, Junjiro N., Ramírez, Alonso, Richardson, John S., Rincón, José, Rubio Ríos, Juan, Dos Santos, Gisele M., Sarremejane, Romain, Sheldon, Fran, Sitati, Augustine, Tenkiano, Nathalie S. D., Tiegs, Scott D., Tolod, Janine R., Venarsky, Michael, Watson, Anne, and Yule, Catherine M.
- Abstract
The relationship between detritivore diversity and decomposition can provide information on how biogeochemical cycles are affected by ongoing rates of extinction, but such evidence has come mostly from local studies and microcosm experiments. We conducted a globally distributed experiment (38 streams across 23 countries in 6 continents) using standardised methods to test the hypothesis that detritivore diversity enhances litter decomposition in streams, to establish the role of other characteristics of detritivore assemblages (abundance, biomass and body size), and to determine how patterns vary across realms, biomes and climates. We observed a positive relationship between diversity and decomposition, strongest in tropical areas, and a key role of abundance and biomass at higher latitudes. Our results suggest that litter decomposition might be altered by detritivore extinctions, particularly in tropical areas, where detritivore diversity is already relatively low and some environmental stressors particularly prevalent.
- Published
- 2021
25. Latitude Dictates Plant Diversity Effects on Instream Decomposition
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Biología vegetal y ecología, Landaren biologia eta ekologia, Boyero González, María Luz, Pérez, Javier, López Rojo, Naiara, Tonin, Alan M., Correa Araneda, Francisco, Pearson, Richard G., Bosch, Jaime, Albariño, Ricardo J., Anbalagan, Sankarappan, Barmuta, Leon A., Beesley, Leah, Burdon, Francis J., Caliman, Adriano, Callisto, Marcos, Campbell, Ian C., Cardinale, Bradley J., Casas Jiménez, José Jesús, Chara Serna, Ana M., Ciapala, Szymon, Chauvet, Eric, Colón-Gaud, Checo, Cornejo, Aydeé, Davis, Aaron M., Degebrodt, Monika, Dias, Emerson S., Díaz, María E., Douglas, Michael M., Elosegi Irurtia, Arturo, Encalada, Andrea C., De Eyto, Elvira, Figueroa, Ricardo, Flecker, Alexander S., Fleituch, Tadeusz, Frainer, André, Franca, Juliana S., García, Erica A., García, Gabriela, García, Pavel, Gessner, Mark O., Giller, Paul S., Gómez, Jesús E., Gómez, Sergio, Gonçalves Jr., José F., Graça, Manuel A. S., Hall Jr., Robert O., Hamada, Neusa, Hepp, Luiz U., Hui, Cang, Imazawa, Daichi, Iwata, Tomoya, Edson Jr., S. A., Kariuki, Samuel, Landeira-Dabarca, Andrea, Leal, María, Lehosmaa, Kaisa, M'Erimba, Charles, Marchant, Richard, Martins, Renato T., Masese, Frank O., Camden, Megan, McKie, Brendan G., Medeiros, Adriana O., Middleton, Jen A., Muotka, Timo, Negishi, Junjiro N., Pozo Martínez, Jesús, Ramírez, Alonso, Rezende, Renan S., Richardson, John S., Rincón, José, Rubio Ríos, Juan, Serrano, Claudia, Shaffer, Angela R., Sheldon, Fran, Swan, Christopher M., Tenkiano, Nathalie S. D., Tiegs, Scott D., Tolod, Janine R., Vernasky, Michael, Watson, Anne, Yegon, Mourine J., Yule, Catherine M., Biología vegetal y ecología, Landaren biologia eta ekologia, Boyero González, María Luz, Pérez, Javier, López Rojo, Naiara, Tonin, Alan M., Correa Araneda, Francisco, Pearson, Richard G., Bosch, Jaime, Albariño, Ricardo J., Anbalagan, Sankarappan, Barmuta, Leon A., Beesley, Leah, Burdon, Francis J., Caliman, Adriano, Callisto, Marcos, Campbell, Ian C., Cardinale, Bradley J., Casas Jiménez, José Jesús, Chara Serna, Ana M., Ciapala, Szymon, Chauvet, Eric, Colón-Gaud, Checo, Cornejo, Aydeé, Davis, Aaron M., Degebrodt, Monika, Dias, Emerson S., Díaz, María E., Douglas, Michael M., Elosegi Irurtia, Arturo, Encalada, Andrea C., De Eyto, Elvira, Figueroa, Ricardo, Flecker, Alexander S., Fleituch, Tadeusz, Frainer, André, Franca, Juliana S., García, Erica A., García, Gabriela, García, Pavel, Gessner, Mark O., Giller, Paul S., Gómez, Jesús E., Gómez, Sergio, Gonçalves Jr., José F., Graça, Manuel A. S., Hall Jr., Robert O., Hamada, Neusa, Hepp, Luiz U., Hui, Cang, Imazawa, Daichi, Iwata, Tomoya, Edson Jr., S. A., Kariuki, Samuel, Landeira-Dabarca, Andrea, Leal, María, Lehosmaa, Kaisa, M'Erimba, Charles, Marchant, Richard, Martins, Renato T., Masese, Frank O., Camden, Megan, McKie, Brendan G., Medeiros, Adriana O., Middleton, Jen A., Muotka, Timo, Negishi, Junjiro N., Pozo Martínez, Jesús, Ramírez, Alonso, Rezende, Renan S., Richardson, John S., Rincón, José, Rubio Ríos, Juan, Serrano, Claudia, Shaffer, Angela R., Sheldon, Fran, Swan, Christopher M., Tenkiano, Nathalie S. D., Tiegs, Scott D., Tolod, Janine R., Vernasky, Michael, Watson, Anne, Yegon, Mourine J., and Yule, Catherine M.
- Abstract
Running waters contribute substantially to global carbon fluxes through decomposition of terrestrial plant litter by aquatic microorganisms and detritivores. Diversity of this litter may influence instream decomposition globally in ways that are not yet understood. We investigated latitudinal differences in decomposition of litter mixtures of low and high functional diversity in 40 streams on 6 continents and spanning 113 degrees of latitude. Despite important variability in our dataset, we found latitudinal differences in the effect of litter functional diversity on decomposition, which we explained as evolutionary adaptations of litter-consuming detritivores to resource availability. Specifically, a balanced diet effect appears to operate at lower latitudes versus a resource concentration effect at higher latitudes. The latitudinal pattern indicates that loss of plant functional diversity will have different consequences on carbon fluxes across the globe, with greater repercussions likely at low latitudes.
- Published
- 2021
26. Litter Decomposition can be Reduced by Pesticide Effects on Detritivores and Decomposers: Implications for Tropical Stream Functioning
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Biología vegetal y ecología, Landaren biologia eta ekologia, Cornejo, Aydeé, Pérez Viñuela, Javier, López Rojo, Naiara, García, Gabriela, Pérez, Edgar, Guerra, Alisson, Nieto, Carlos, Boyero González, María Luz, Biología vegetal y ecología, Landaren biologia eta ekologia, Cornejo, Aydeé, Pérez Viñuela, Javier, López Rojo, Naiara, García, Gabriela, Pérez, Edgar, Guerra, Alisson, Nieto, Carlos, and Boyero González, María Luz
- Abstract
Understanding which factors affect the process of leaf litter decomposition is crucial if we are to predict changes in the functioning of stream ecosystems as a result of human activities. One major activity with known consequences on streams is agriculture, which is of particular concern in tropical regions, where forests are being rapidly replaced by crops. While pesticides are potential drivers of reduced decomposition rates observed in agricultural tropical streams, their specific effects on the performance of decomposers and detritivores are mostly unknown. We used a microcosm experiment to examine the individual and joint effects of an insecticide (chlorpyrifos) and a fungicide (chlorothalonil) on survival and growth of detritivores (Anchytarsus, Hyalella and Lepidostoma), aquatic hyphomycetes (AH) sporulation rate, taxon richness, assemblage structure, and leaf litter decomposition rates. Our results revealed detrimental effects on detritivore survival (which were mostly due to the insecticide and strongest for Hyalella), changes in AH assemblage structure, and reduced sporulation rate, taxon richness and microbial decomposition (mostly in response to the fungicide). Total decomposition was reduced especially when the pesticides were combined, suggesting that they operated differently and their effects were additive. Importantly, effects on decomposition were greater for single-species detritivore treatments than for the 3-species mixture, indicating that detritivore species loss may exacerbate the consequences of pesticides of stream ecosystem functioning.
- Published
- 2021
27. Extreme temperature events alter stream ecosystem functioning
- Author
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Biología vegetal y ecología, Landaren biologia eta ekologia, Pérez Viñuela, Javier, Correa Araneda, Francisco, López Rojo, Naiara, Basaguren del Campo, Ana Luisa, Boyero González, María Luz, Biología vegetal y ecología, Landaren biologia eta ekologia, Pérez Viñuela, Javier, Correa Araneda, Francisco, López Rojo, Naiara, Basaguren del Campo, Ana Luisa, and Boyero González, María Luz
- Abstract
Extreme temperature events have increased in intensity, duration and frequency in the last century, with potential consequences on organisms and ecosystems. In many streams, leaf litter of terrestrial origin is a key resource for microorganisms and some detritivores, and its decomposition has a main role on ecosystem functioning and is often used as an indicator of ecological integrity. As litter is often exposed to atmospheric conditions before entering the stream, extreme warming and freezing events may alter its physicochemical structure and affect decomposition and associated detritivores. We tested this prediction in a microcosm experiment by exposing litter of three tree species (in single-species treatments and the 3-species mixture) to different temperature pre-treatments: heating (40 degrees C), freezing ( - 20 degrees C) and both (heating followed by freezing). We then examined changes in litter traits due to leaching (72 h), litter decomposition in the absence and presence of detritivores, and detritivore growth (28 d), with focus on mass and nutrient (nitrogen and phosphorus) changes. Nutrient leaching was promoted mostly by the heating pre-treatment, which apparently produced lower-quality litter. However, microbial activity mostly resulted in litter mass and nutrient gain, which were reinforced by the heating pre-treatment, while freezing had the opposite effect. When detritivores were present, decomposition showed high variation among litter types but, again, the heating and freezing pre-treatments tended to reduce and enhance nutrient loss, respectively. The greatest and more consistent effects occurred for detritivore growth, which was reduced by temperature pre-treatments, particularly in the highest-quality litter type. In general, the sequential application of heating and freezing pre-treatments showed no synergistic effect, and the litter mixture showed similar responses to single-species treatments. Our results demonstrate that short-term extre
- Published
- 2021
28. Microplastics increase susceptibility of amphibian larvae to the chytrid fungus Batrachochytrium dendrobatidis
- Author
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Ministerio de Ciencia e Innovación (España), Eusko Jaurlaritza, Natural Environment Research Council (UK), Bosch, Jaime, Thumsová, Barbora, López‑Rojo, Naiara, Pérez, Javier, Alonso, Alberto, Fisher, Matthew C., Boyero, Luz, Ministerio de Ciencia e Innovación (España), Eusko Jaurlaritza, Natural Environment Research Council (UK), Bosch, Jaime, Thumsová, Barbora, López‑Rojo, Naiara, Pérez, Javier, Alonso, Alberto, Fisher, Matthew C., and Boyero, Luz
- Abstract
Microplastics (MPs), a new class of pollutants that pose a threat to aquatic biodiversity, are of increasing global concern. In tandem, the amphibian chytrid fungus Batrachochytrium dendrobatidis (Bd) causing the disease chytridiomycosis is emerging worldwide as a major stressor to amphibians. We here assess whether synergies exist between this infectious disease and MP pollution by mimicking natural contact of a highly susceptible species (midwife toads, Alytes obstetricans) with a Bd-infected reservoir species (fire salamanders, Salamandra salamandra) in the presence and absence of MPs. We found that MP ingestion increases the burden of infection by Bd in a dose‑dependent manner. However, MPs accumulated to a greater extent in amphibians that were not exposed to Bd, likely due to Bd‑damaged tadpole mouthparts interfering with MP ingestion. Our experimental approach showed compelling interactions between two emergent processes, chytridiomycosis and MP pollution, necessitating further research into potential synergies between these biotic and abiotic threats to amphibians.
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- 2021
29. Loss of Key Riparian Plant SpeciesImpacts Stream Ecosystem Functioning
- Author
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Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Eusko Jaurlaritza, Alonso, Alberto, Pérez, Javier, Monroy, Silvia, López-Rojo, Naiara, Basaguren, Ana, Bosch, Jaime, Boyero, Luz, Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Eusko Jaurlaritza, Alonso, Alberto, Pérez, Javier, Monroy, Silvia, López-Rojo, Naiara, Basaguren, Ana, Bosch, Jaime, and Boyero, Luz
- Abstract
Leaf litter of alder (Alnus glutinosa) is a key resource to detrital stream food webs. Due to its high quality and palatability, it is readily colonised by microorganisms and consumed by detritivores, contributing significantly to carbon and nutrient cycling and to ecosystem functioning. Given that this species has declined due to the spread of the pathogen Phytophthora alni, we investigated how its loss would alter leaf litter decomposition and associated stream assemblages of aquatic hyphomycetes and invertebrates, in a field experiment conducted in three streams. We compared litter mixtures containing alder plus three other species (Corylus avellana, Quercus robur and Salix atrocinerea; that is, 4-species treatments) with mixtures that excluded alder (3-species treatments) and all the monocultures (1-species treatments). The loss of alder reduced decomposition rates, despite the existence of an overall negative diversity effect after 3 weeks of exposure (that is, monocultures decomposed faster than mixtures) and no diversity effect after 6 weeks. Aquatic hyphomycete and detritivore assemblage structure in the mixture without alder differed from those of the mixture with alder and the monocultures, and the former had lower fungal sporulation rate and taxon richness. Our results suggest that alder loss from the riparian vegetation can significantly slow down the processing of organic matter in streams and produce shifts in stream assemblages, with potential consequences on overall ecosystem functioning. We highlight the importance of assessing the ecological consequences of losing single species, particularly those especially vulnerable to stressors, to complement the multiple studies that have assessed the effects of random species loss.
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- 2021
30. Latitude dictates plant diversity effects on instream decomposition
- Author
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Eusko Jaurlaritza, European Commission, Fundação para a Ciência e a Tecnologia (Portugal), Boyero, Luis, Pérez, Javier, López-Rojo, Naiara, Tonin, Alan M., Correa-Araneda, Francisco, Pearson, Richard G., Bosch, Jaime, Eusko Jaurlaritza, European Commission, Fundação para a Ciência e a Tecnologia (Portugal), Boyero, Luis, Pérez, Javier, López-Rojo, Naiara, Tonin, Alan M., Correa-Araneda, Francisco, Pearson, Richard G., and Bosch, Jaime
- Abstract
Running waters contribute substantially to global carbon fluxes through decomposition of terrestrial plant litter by aquatic microorganisms and detritivores. Diversity of this litter may influence instream decomposition globally in ways that are not yet understood. We investigated latitudinal differences in decomposition of litter mixtures of low and high functional diversity in 40 streams on 6 continents and spanning 113° of latitude. Despite important variability in our dataset, we found latitudinal differences in the effect of litter functional diversity on decomposition, which we explained as evolutionary adaptations of litter-consuming detritivores to resource availability. Specifically, a balanced diet effect appears to operate at lower latitudes versus a resource concentration effect at higher latitudes. The latitudinal pattern indicates that loss of plant functional diversity will have different consequences on carbon fluxes across the globe, with greater repercussions likely at low latitudes.
- Published
- 2021
31. Impacts of detritivore diversity loss on instream decomposition are greatest in the tropics
- Author
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Eusko Jaurlaritza, Universidad del País Vasco, Boyero, Luz, López-Rojo, Naiara, Tonin, Alan M., Pérez, Javier, Correa-Araneda, Francisco, Pearson, Richard G., Bosch, Jaime, Eusko Jaurlaritza, Universidad del País Vasco, Boyero, Luz, López-Rojo, Naiara, Tonin, Alan M., Pérez, Javier, Correa-Araneda, Francisco, Pearson, Richard G., and Bosch, Jaime
- Abstract
he relationship between detritivore diversity and decomposition can provide information on how biogeochemical cycles are affected by ongoing rates of extinction, but such evidence has come mostly from local studies and microcosm experiments. We conducted a globally distributed experiment (38 streams across 23 countries in 6 continents) using standardised methods to test the hypothesis that detritivore diversity enhances litter decomposition in streams, to establish the role of other characteristics of detritivore assemblages (abundance, biomass and body size), and to determine how patterns vary across realms, biomes and climates. We observed a positive relationship between diversity and decomposition, strongest in tropical areas, and a key role of abundance and biomass at higher latitudes. Our results suggest that litter decomposition might be altered by detritivore extinctions, particularly in tropical areas, where detritivore diversity is already relatively low and some environmental stressors particularly prevalent.
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- 2021
32. Latitude dictates plant diversity effects on instream decomposition
- Author
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Boyero, Luz, primary, Pérez, Javier, additional, López-Rojo, Naiara, additional, Tonin, Alan M., additional, Correa-Araneda, Francisco, additional, Pearson, Richard G., additional, Bosch, Jaime, additional, Albariño, Ricardo J., additional, Anbalagan, Sankarappan, additional, Barmuta, Leon A., additional, Beesley, Leah, additional, Burdon, Francis J., additional, Caliman, Adriano, additional, Callisto, Marcos, additional, Campbell, Ian C., additional, Cardinale, Bradley J., additional, Casas, J. Jesús, additional, Chará-Serna, Ana M., additional, Ciapała, Szymon, additional, Chauvet, Eric, additional, Colón-Gaud, Checo, additional, Cornejo, Aydeé, additional, Davis, Aaron M., additional, Degebrodt, Monika, additional, Dias, Emerson S., additional, Díaz, María E., additional, Douglas, Michael M., additional, Elosegi, Arturo, additional, Encalada, Andrea C., additional, de Eyto, Elvira, additional, Figueroa, Ricardo, additional, Flecker, Alexander S., additional, Fleituch, Tadeusz, additional, Frainer, André, additional, França, Juliana S., additional, García, Erica A., additional, García, Gabriela, additional, García, Pavel, additional, Gessner, Mark O., additional, Giller, Paul S., additional, Gómez, Jesús E., additional, Gómez, Sergio, additional, Gonçalves, Jose F., additional, Graça, Manuel A. S., additional, Hall, Robert O., additional, Hamada, Neusa, additional, Hepp, Luiz U., additional, Hui, Cang, additional, Imazawa, Daichi, additional, Iwata, Tomoya, additional, Junior, Edson S. A., additional, Kariuki, Samuel, additional, Landeira-Dabarca, Andrea, additional, Leal, María, additional, Lehosmaa, Kaisa, additional, M’Erimba, Charles, additional, Marchant, Richard, additional, Martins, Renato T., additional, Masese, Frank O., additional, Camden, Megan, additional, McKie, Brendan G., additional, Medeiros, Adriana O., additional, Middleton, Jen A., additional, Muotka, Timo, additional, Negishi, Junjiro N., additional, Pozo, Jesús, additional, Ramírez, Alonso, additional, Rezende, Renan S., additional, Richardson, John S., additional, Rincón, José, additional, Rubio-Ríos, Juan, additional, Serrano, Claudia, additional, Shaffer, Angela R., additional, Sheldon, Fran, additional, Swan, Christopher M., additional, Tenkiano, Nathalie S. D., additional, Tiegs, Scott D., additional, Tolod, Janine R., additional, Vernasky, Michael, additional, Watson, Anne, additional, Yegon, Mourine J., additional, and Yule, Catherine M., additional
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- 2021
- Full Text
- View/download PDF
33. Extreme temperature events alter stream ecosystem functioning
- Author
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Pérez, Javier, primary, Correa-Araneda, Francisco, additional, López-Rojo, Naiara, additional, Basaguren, Ana, additional, and Boyero, Luz, additional
- Published
- 2021
- Full Text
- View/download PDF
34. Functional repercussions of riparian biodivesity loss in streams. Multifunctionality, diversity metrics and underlying mechanisms
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López Rojo, Naiara, Basaguren del Campo, Ana Luisa, and Boyero González, María Luz
- Subjects
limnology ,invertebrados ,limnología ,invertebrates - Abstract
152 p. El objetivo de esta tesis es abordar cuestiones clave poco exploradas en la investigación de la relación entre la biodiversidad y el funcionamiento de los ecosistemas (BEF, por sus siglas en inglés). Concretamente se estudia cómo la pérdida de diversidad en el bosque ripario puede alterar el funcionamiento del ecosistema fluvial. Primeramente, se explora cómo la pérdida de diversidad de hojarasca puede afectar de manera simultánea a múltiples procesos fundamentales para los arroyos de cabecera. Los resultados evidencian efectos en múltiples procesos y demuestran que, a pesar de la utilidad de las métricas de multifuncionalidad para evaluar los impactos generales en el ecosistema, el análisis individual de diferentes procesos es esencial para comprender completamente cómo los organismos, las redes tróficas y, en última instancia, los ecosistemas, se ven alterados por la pérdida de diversidad. Los efectos más marcados y consistentes se detectaron sobre el reciclado de nutrientes. Además, se analiza la potencial interacción de la vía detrítica con la autótrofa, dentro de la cadena trófica de los arroyos de cabecera. Los resultados evidencian la existencia de interacciones débiles entre ambas, sin relaciones complejas entre la biodiversidad y los procesos de los ecosistemas a través de las vías. La siguiente cuestión abordada es la relevancia de diferentes métricas de biodiversidad (riqueza de especies, distancia filogenética y variabilidad de los rasgos biológicos) dentro del contexto BEF. Los diferentes estudios, tanto de campo como de laboratorio, revelaron diferencias importantes entre estas métricas, destacando el papel principal de rasgos concretos de la hojarasca (principalmente las concentraciones de los nutrientes principales) como promotores de las relaciones BEF. Por último, con el objetivo de mejorar nuestra comprensión de los mecanismos subyacentes dichas relaciones, se explora la importancia relativa de los efectos de complementariedad y selección entre las especies de hojarasca. La complementariedad de recursos resultó ser, en la mayoría de los casos, el mecanismo dominante, lo que destaca la relevancia de las interacciones interespecíficas como mediadoras de los efectos de la biodiversidad en el funcionamiento de los ecosistemas. En su conjunto, esta tesis proporciona un avance importante en la comprensión de cómo la pérdida y el reemplazo de especies de plantas riparias puede causar alteraciones significativas en múltiples procesos que son fundamentales para el funcionamiento de los arroyos de cabecera.
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- 2020
35. A common fungicide impairs stream ecosystem functioning through effects on aquatic hyphomycetes and detritivorous caddisflies
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Biología vegetal y ecología, Landaren biologia eta ekologia, Cornejo, Aydeé, Pérez Viñuela, Javier, Alonso Blanco, Alberto, López Rojo, Naiara, Monroy Zarzuelo, Silvia, Boyero González, María Luz, Biología vegetal y ecología, Landaren biologia eta ekologia, Cornejo, Aydeé, Pérez Viñuela, Javier, Alonso Blanco, Alberto, López Rojo, Naiara, Monroy Zarzuelo, Silvia, and Boyero González, María Luz
- Abstract
Fungicides can reach streams through runoff or adhered to leaf litter, and have the potential to adversely affect processes such as litter decomposition and associated communities. This study investigated the effects of chlorothalonil, a widely used fungicide, on litter decomposition, detritivorous invertebrates (larvae of the insect Sericostoma pyrenaicum) and aquatic hyphomycetes (AHs), using stream microcosms. We considered the single and combined effects of two exposure modes: waterborne fungicide (at two concentrations: 0.125 mu g L-1 and 1.25 mu g L-1) and litter previously sprayed with the fungicide (i.e., pre-treated litter, using the application dose concentration of 1250 mu g L-1). We also assessed whether fungicide effects on invertebrates, AHs and decomposition varied among litter types (i.e., different plant species), and whether plant diversity mitigated any of those effects. Invertebrate survival and AH sporulation rate and taxon richness were strongly reduced by most combinations of fungicide exposure modes; however, invertebrates were not affected by the low waterborne concentration, whereas AHs suffered the highest reduction at this concentration. Total decomposition was slowed down by both exposure modes, and microbial decomposition was reduced by litter pre-treatment, while the waterborne fungicide had different effects depending on plant species. In general, with the exception of microbial decomposition, responses varied little among litter types. Moreover, and contrary to our expectation, plant diversity did not modulate the fungicide effects. Our results highlight the severity of fungicide inputs to streams through effects on invertebrate and microbial communities and ecosystem functioning, even in streams with well-preserved, diverse riparian vegetation.
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- 2020
36. Functional repercussions of riparian biodivesity loss in streams. Multifunctionality, diversity metrics and underlying mechanisms.
- Author
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Basaguren del Campo, Ana Luisa, Boyero González, María Luz, Biología vegetal y ecología, Landaren biologia eta ekologia, López Rojo, Naiara, Basaguren del Campo, Ana Luisa, Boyero González, María Luz, Biología vegetal y ecología, Landaren biologia eta ekologia, and López Rojo, Naiara
- Abstract
152 p., El objetivo de esta tesis es abordar cuestiones clave poco exploradas en la investigación de la relación entre la biodiversidad y el funcionamiento de los ecosistemas (BEF, por sus siglas en inglés). Concretamente se estudia cómo la pérdida de diversidad en el bosque ripario puede alterar el funcionamiento del ecosistema fluvial. Primeramente, se explora cómo la pérdida de diversidad de hojarasca puede afectar de manera simultánea a múltiples procesos fundamentales para los arroyos de cabecera. Los resultados evidencian efectos en múltiples procesos y demuestran que, a pesar de la utilidad de las métricas de multifuncionalidad para evaluar los impactos generales en el ecosistema, el análisis individual de diferentes procesos es esencial para comprender completamente cómo los organismos, las redes tróficas y, en última instancia, los ecosistemas, se ven alterados por la pérdida de diversidad. Los efectos más marcados y consistentes se detectaron sobre el reciclado de nutrientes. Además, se analiza la potencial interacción de la vía detrítica con la autótrofa, dentro de la cadena trófica de los arroyos de cabecera. Los resultados evidencian la existencia de interacciones débiles entre ambas, sin relaciones complejas entre la biodiversidad y los procesos de los ecosistemas a través de las vías. La siguiente cuestión abordada es la relevancia de diferentes métricas de biodiversidad (riqueza de especies, distancia filogenética y variabilidad de los rasgos biológicos) dentro del contexto BEF. Los diferentes estudios, tanto de campo como de laboratorio, revelaron diferencias importantes entre estas métricas, destacando el papel principal de rasgos concretos de la hojarasca (principalmente las concentraciones de los nutrientes principales) como promotores de las relaciones BEF. Por último, con el objetivo de mejorar nuestra comprensión de los mecanismos subyacentes dichas relaciones, se explora la importancia relativa de los efectos de complementariedad y selección entre la
- Published
- 2020
37. Agriculture impairs stream ecosystem functioning in a tropical catchment
- Author
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Biología vegetal y ecología, Landaren biologia eta ekologia, Cornejo, Aydeé, Pérez Viñuela, Javier, López Rojo, Naiara, Tonin, Alan M., Rovira, Dalys, Checa, Brenda, Jaramillo, Nicomedes, Correa, Karina, Villarreal, Allison, Villarreal, Víctor, García, Gabriela, Pérez, Edgar, Ríos González, Tomas A., Aguirre, Yusseff, Correa Araneda, Francisco, Boyero González, María Luz, Biología vegetal y ecología, Landaren biologia eta ekologia, Cornejo, Aydeé, Pérez Viñuela, Javier, López Rojo, Naiara, Tonin, Alan M., Rovira, Dalys, Checa, Brenda, Jaramillo, Nicomedes, Correa, Karina, Villarreal, Allison, Villarreal, Víctor, García, Gabriela, Pérez, Edgar, Ríos González, Tomas A., Aguirre, Yusseff, Correa Araneda, Francisco, and Boyero González, María Luz
- Abstract
The expansion of agriculture is particularly worrying in tropical regions of the world, where native forests are being replaced by crops at alarming rates, with severe consequences for biodiversity and ecosystems. However, there is little information about the potential effects of agriculture on the functioning of tropical streams, which is essential if we are to assess the condition and ecological integrity of these ecosystems. We conducted a litter decomposition experiment in streams within a tropical catchment, which were subjected to different degrees of agricultural influence: low (protected area, PA), medium (buffer area, BA) and high (agricultural area, AA). We quantified decomposition rates of litter enclosed within coarse-mesh and fine-mesh bags, which allowed the distinction of microbial and detritivore-mediated decomposition pathways. We used litter of three riparian species representing a gradient in litter quality (Alnus acuminate > Ficus irtsipida > Querns burnelioides), and examined detritivore assemblages through the contents of litterbags and benthic samples. We found that the increasing agricultural influence promoted microbial decomposition, probably due to nutrient-mediated stimulation; and inhibited detritivore-mediated and total decomposition because of reduced detritivore numbers, most likely caused by pesticides and sedimentation. Effects were evident for Alnus and Ficus, but not for Querns, which was barely decomposed across the gradient. Our study provides key evidence about the impact of agriculture on topical stream ecosystem functioning, which is associated to changes in stream assemblages and may have far-reaching repercussions for global biochemical cycles. (C) 2020 The Authors. Published by Elsevier B.V.
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- 2020
38. Microplastics impair amphibian survival, body condition and function
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Ministerio de Ciencia, Innovación y Universidades (España), Eusko Jaurlaritza, Boyero, Luz, López-Rojo, Naiara, Bosch, Jaime, Alonso, Alberto, Correa-Araneda, Francisco, Pérez, Javier, Ministerio de Ciencia, Innovación y Universidades (España), Eusko Jaurlaritza, Boyero, Luz, López-Rojo, Naiara, Bosch, Jaime, Alonso, Alberto, Correa-Araneda, Francisco, and Pérez, Javier
- Abstract
Microplastics (MPs) are contaminants of increasing concern; they are abundant, ubiquitous andpersistent over time, representing potential risks for organisms and ecosystems. However, such risks arestill virtually unknown for amphibians, despite the particular attention that these organisms oftenreceive because of their global decline. We examined the effects of MPs (fluorescent, 10-mm polystyrenemicrospheres) at different concentrations (from 0 to 103particles mL 1) on tadpoles of the commonmidwife toad,Alytes obstetricans, using a microcosm experiment. We assessed MP effects on tadpolefeeding, growth and body condition, as well as their ingestion and egestion of MPs (estimated throughfluorescence). Additionally, we explored whether MPs became attached to periphyton (the main foodsource for these tadpoles, thus potentially representing a major way of MP ingestion), and the effect ofMPs on periphyton growth (which may translate into altered freshwater ecosystem functioning). Ourresults showed significant effects on all the examined variables, and caused tadpole mortality at thehighest concentration; also,fluorescence indicated the presence of MPs in tadpoles, tadpole faeces and periphyton. This suggests that MPs can be an important source of stress for amphibians in addition toother pollutants, climate change, habitat loss or chytrid infections, and that amphibians can be a majortransfer path for MPs from freshwater to terrestrial ecosystems.
- Published
- 2020
39. Agriculture impairs stream ecosystem functioning in a tropical catchment
- Author
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Cornejo, Aydeé, primary, Pérez, Javier, additional, López-Rojo, Naiara, additional, Tonin, Alan M., additional, Rovira, Dalys, additional, Checa, Brenda, additional, Jaramillo, Nicomedes, additional, Correa, Karina, additional, Villarreal, Allison, additional, Villarreal, Víctor, additional, García, Gabriela, additional, Pérez, Edgar, additional, Ríos González, Tomás A., additional, Aguirre, Yusseff, additional, Correa-Araneda, Francisco, additional, and Boyero, Luz, additional
- Published
- 2020
- Full Text
- View/download PDF
40. Shifts in Key Leaf Litter Traits Can Predict Effects of Plant Diversity Loss on Decomposition in Streams
- Author
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López-Rojo, Naiara, primary, Pérez, Javier, additional, Pozo, Jesús, additional, Basaguren, Ana, additional, Apodaka-Etxebarria, Unai, additional, Correa-Araneda, Francisco, additional, and Boyero, Luz, additional
- Published
- 2020
- Full Text
- View/download PDF
41. Microplastics impair amphibian survival, body condition and function
- Author
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Boyero, Luz, primary, López-Rojo, Naiara, additional, Bosch, Jaime, additional, Alonso, Alberto, additional, Correa-Araneda, Francisco, additional, and Pérez, Javier, additional
- Published
- 2020
- Full Text
- View/download PDF
42. Microplastics have lethal and sublethal effects on stream invertebrates and affect stream ecosystem functioning
- Author
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López-Rojo, Naiara, primary, Pérez, Javier, additional, Alonso, Alberto, additional, Correa-Araneda, Francisco, additional, and Boyero, Luz, additional
- Published
- 2020
- Full Text
- View/download PDF
43. Extreme climate events can slow down litter breakdown in streams
- Author
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Correa-Araneda, Francisco, primary, Tonin, Alan M., additional, Pérez, Javier, additional, Álvarez, Katia, additional, López-Rojo, Naiara, additional, Díaz, Angie, additional, Esse, Carlos, additional, Encina-Montoya, Francisco, additional, Figueroa, Ricardo, additional, Cornejo, Aydeé, additional, and Boyero, Luz, additional
- Published
- 2020
- Full Text
- View/download PDF
44. Leaf Traits Drive Plant Diversity Effects On Litter Decomposition And FPOM Production In Streams
- Author
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Biología vegetal y ecología, Landaren biologia eta ekologia, López Rojo, Naiara, Martínez Gómez, Aingeru, Pérez Viñuela, Javier, Basaguren del Campo, Ana Luisa, Pozo Martínez, Jesús, Boyero González, María Luz, Biología vegetal y ecología, Landaren biologia eta ekologia, López Rojo, Naiara, Martínez Gómez, Aingeru, Pérez Viñuela, Javier, Basaguren del Campo, Ana Luisa, Pozo Martínez, Jesús, and Boyero González, María Luz
- Abstract
Biodiversity loss in riparian forests has the potential to alter rates of leaf litter decomposition in stream ecosystems. However, studies have reported the full range of positive, negative and no effects of plant diversity loss on decomposition, and there is currently no explanation for such inconsistent results. Furthermore, it is uncertain whether plant diversity loss affects other ecological processes related to decomposition, such as fine particulate organic matter production or detritivore growth, which precludes a thorough understanding of how detrital stream food webs are impacted by plant diversity loss. We used a microcosm experiment to examine the effects of plant diversity loss on litter decomposition, fine particulate organic matter production, and growth of a dominant leaf-shredding detritivore, using litter mixtures varying in species composition. We hypothesized that plant diversity loss would decrease the rates of all studied processes, but such effects would depend on the leaf traits present in litter mixtures (both their average values and their variability). Our findings partly supported our hypotheses, showing that plant diversity loss had a consistently negative effect on litter decomposition and fine particulate organic matter production (but not on detritivore growth) across litter mixtures, which was mediated by detritivores. Importantly, the magnitude of the diversity effect and the relative importance of different mechanisms underlying this effect (i.e., complementarity vs. selection) varied depending on the species composition of litter mixtures, mainly because of differences in litter nutritional quality and trait variability. Complementarity was prevalent but varied in size, with positive selection effects also occurring in some mixtures. Our results support the notion that loss of riparian plant species is detrimental to key stream ecosystem processes that drive detrital food webs, but that the magnitude of such effects largely depends
- Published
- 2018
45. Leaf traits drive plant diversity effects on litter decomposition and FPOM production in streams
- Author
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López-Rojo, Naiara, primary, Martínez, Aingeru, additional, Pérez, Javier, additional, Basaguren, Ana, additional, Pozo, Jesús, additional, and Boyero, Luz, additional
- Published
- 2018
- Full Text
- View/download PDF
46. Structural and functional recovery of macroinvertebrate communities and leaf litter decomposition after a marked drought: Does vegetation type matter?
- Author
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Monroy, Silvia, primary, Martínez, Aingeru, additional, López-Rojo, Naiara, additional, Pérez-Calpe, Ana Victoria, additional, Basaguren, Ana, additional, and Pozo, Jesús, additional
- Published
- 2017
- Full Text
- View/download PDF
47. Efecto de la temperatura y la ración sobre el metabolismo de la carpa dorada (Carassius auratus)
- Author
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López Rojo, Naiara, Pérez Iglesias, Juan Ignacio, F. CIENCIA Y TECNOLOGIA, ZIENTZIA ETA TEKNOLOGIA F., Grado en Biología, and Biologiako Gradua
- Subjects
metabolismo ,carpa dorada - Abstract
[ES] Se llevan a cabo tres experimentos para estudiar el efecto de tres factores el metabolismo de Carassius auratus: temperatura de exposición, ración de alimento diario y tiempo transcurrido tras la exposición a las nuevas condiciones. [EN] Three experiments are carried out to study the effect of three factors in goldfish metabolism: exposure temperature, daily food ration and time elapsed after exposure to the new conditions.
- Published
- 2015
48. Efecto de la temperatura y la ración sobre el metabolismo de la carpa dorada (Carassius auratus)
- Author
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Pérez Iglesias, Juan Ignacio, F. CIENCIA Y TECNOLOGIA, ZIENTZIA ETA TEKNOLOGIA F., Grado en Biología, Biologiako Gradua, López Rojo, Naiara, Pérez Iglesias, Juan Ignacio, F. CIENCIA Y TECNOLOGIA, ZIENTZIA ETA TEKNOLOGIA F., Grado en Biología, Biologiako Gradua, and López Rojo, Naiara
- Abstract
[ES] Se llevan a cabo tres experimentos para estudiar el efecto de tres factores el metabolismo de Carassius auratus: temperatura de exposición, ración de alimento diario y tiempo transcurrido tras la exposición a las nuevas condiciones., [EN] Three experiments are carried out to study the effect of three factors in goldfish metabolism: exposure temperature, daily food ration and time elapsed after exposure to the new conditions.
- Published
- 2016
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