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2. Habitat segregation of Pond bats - consequences for reproduction, commuting, hibernation, predation and diet

Author

Siepel, H., Gravendeel, B., Jongejans, E., Haarsma, A.J.M., Siepel, H., Gravendeel, B., Jongejans, E., and Haarsma, A.J.M.

Abstract

Radboud University, 29 september 2023, Promotores : Siepel, H., Gravendeel, B. Co-promotor : Jongejans, E., Contains fulltext : 296594.pdf (Publisher’s version ) (Closed access), Pond bats live in buildings. They make use of gaps under roof tiles and in cavity walls. They need habitats of varying temperatures. Just like most European bats, the pond bat is heterothermic: it can choose between self-regulating its body temperature or determining its temperature by its environment. Male and female pond bats live in separated areas for the entire year. The females live in maternity colonies and have their own areas for food and habitation. The males live in the vicinity of the females as well as along large rivers in areas only visited by the females in autumn. Pond bats thrive on this LAT (living-apart-together) relationship. As insect eaters, pond bats must survive a period of extreme food scarcity every year. They can survive the winter with minimal fat reserves by hibernating in safe locations with a stable temperature. Before and after hibernation, the bats must divide their energy between mating, giving birth to and raising their young, migrating and gaining weight for hibernation. The timing and expected energy expenditure of these events are different for males and females. The living spaces and food habitat preferences of both sexes therefore also differ. This PhD dissertation substantiates how the differences in energy needs between both sexes explain the LAT relationships of pond bats. Renovation and the demolishing of living environments mainly affect female pond bats. Depending on the varying availability of food, their young grow quicker or slower: for fast growth, a warm habitat is desired; for slow growth, a cool habitat. Well-insulated houses are too uniform regarding temperature, as a result of which reproduction problems arise. As a consequence, the pond bat population in the Netherlands has been in decline for years. Unfortunately, no sufficient replacement habitats for pond bats have yet been created. Insights from this PhD dissertation could accelerate the construction of alternative pond bat habitats. To save energy in the

Published
2023

4. A standard protocol to report discrete stage-structured demographic information

Author

Gascoigne, S.J.L., Rolph, S., Sankey, D., Nidadavolu, N., Stell Pičman, A.S., Hernández, C.M., Philpott, M.E.R., Salam, A., Bernard, C., Fenollosa, E., Lee, Y.J., McLean, J., Hetti Achchige Perera, S., Spacey, O.G., Kajin, M., Vinton, A.C., Archer, C.R., Burns, J.H., Buss, D.L., Caswell, H., Che-Castaldo, J.P., Childs, D.Z., Capdevila, P., Compagnoni, A., Crone, E., Ezard, T.H.G., Hodgson, D., Knight, Tiffany, Jones, O.R., Jongejans, E., McDonald, J., Tenhumberg, B., Thomas, C.C., Tyre, A.J., Ramula, S., Stott, I., Tremblay, R.L., Wilson, P., Vaupel, J.W., Salguero-Gómez, R., Gascoigne, S.J.L., Rolph, S., Sankey, D., Nidadavolu, N., Stell Pičman, A.S., Hernández, C.M., Philpott, M.E.R., Salam, A., Bernard, C., Fenollosa, E., Lee, Y.J., McLean, J., Hetti Achchige Perera, S., Spacey, O.G., Kajin, M., Vinton, A.C., Archer, C.R., Burns, J.H., Buss, D.L., Caswell, H., Che-Castaldo, J.P., Childs, D.Z., Capdevila, P., Compagnoni, A., Crone, E., Ezard, T.H.G., Hodgson, D., Knight, Tiffany, Jones, O.R., Jongejans, E., McDonald, J., Tenhumberg, B., Thomas, C.C., Tyre, A.J., Ramula, S., Stott, I., Tremblay, R.L., Wilson, P., Vaupel, J.W., and Salguero-Gómez, R.

Abstract

Stage-based demographic methods, such as matrix population models (MPMs), are powerful tools used to address a broad range of fundamental questions in ecology, evolutionary biology and conservation science. Accordingly, MPMs now exist for over 3000 species worldwide. These data are being digitised as an ongoing process and periodically released into two large open-access online repositories: the COMPADRE Plant Matrix Database and the COMADRE Animal Matrix Database. During the last decade, data archiving and curation of COMPADRE and COMADRE, and subsequent comparative research, have revealed pronounced variation in how MPMs are parameterized and reported.Here, we summarise current issues related to the parameterisation and reporting of MPMs that arise most frequently and outline how they affect MPM construction, analysis, and interpretation. To quantify variation in how MPMs are reported, we present results from a survey identifying key aspects of MPMs that are frequently unreported in manuscripts. We then screen COMPADRE and COMADRE to quantify how often key pieces of information are omitted from manuscripts using MPMs.Over 80% of surveyed researchers (n = 60) state a clear benefit to adopting more standardised methodologies for reporting MPMs. Furthermore, over 85% of the 300 MPMs assessed from COMPADRE and COMADRE omitted one or more elements that are key to their accurate interpretation. Based on these insights, we identify fundamental issues that can arise from MPM construction and communication and provide suggestions to improve clarity, reproducibility and future research utilising MPMs and their required metadata. To fortify reproducibility and empower researchers to take full advantage of their demographic data, we introduce a standardised protocol to present MPMs in publications. This standard is linked to www.compadre-db.org, so that authors wishing to archive their MPMs can do so prior to submission of publications, following examples from other open-acce

Published
2023

5. GPS-zenders bron voor biodiversiteitsonderzoek

Author

Kolk, H.J. van der, Desmet, P., Davidson, S., Ens, B., Jongejans, E., Kolk, H.J. van der, Desmet, P., Davidson, S., Ens, B., and Jongejans, E.

Abstract

Wereldwijd zijn tienduizenden dieren met GPS-zenders uitgerust. Onderzoekers gebruiken de gegevens om diergedrag te bestuderen, of om soorten te beschermen. Ook vertellen de zenders veel over de verspreiding van soorten. Een onderzoeksteam heeft nu de vertaalslag gemaakt die het eindelijk mogelijk maakt om GPS- gegevens in te zetten voor biodiversiteitsonderzoek.

Published
2023

11. Causes of spatiotemporal variation in reproductive performance of Eurasian oystercatchers in a human-dominated landscape

Author

de Kroon, J.C.J.M., Ens, B. J., Jongejans, E., van de Pol, M., Frauendorf, M., de Kroon, J.C.J.M., Ens, B. J., Jongejans, E., van de Pol, M., and Frauendorf, M.

Abstract

Radboud University, 14 september 2022, Promotor : de Kroon, J.C.J.M. Co-promotores : Ens, B. J., Jongejans, E., van de Pol, M., Contains fulltext : 252642.pdf (Publisher’s version ) (Open Access)

Published
2022

12. Boom and bust of aquatic invaders: implications for management

Author

Leuven, R.S.E.W., Collas, F.P.L., Thunnissen, N.W., Jongejans, E., Velde, G. van der, Leuven, R.S.E.W., Collas, F.P.L., Thunnissen, N.W., Jongejans, E., and Velde, G. van der

Abstract

Session A-9: Ecological risks and impacts, 18 april 2022, Item does not contain fulltext

Published
2022

13. Risicoscan van uitheemse zoetwatermollusken in Nederland

Author

Thunnissen, N.W., Collas, F.P.L., Jongejans, E., Velde, G. van der, Leuven, R.S.E.W., Thunnissen, N.W., Collas, F.P.L., Jongejans, E., Velde, G. van der, and Leuven, R.S.E.W.

Abstract

Contains fulltext : 284233.pdf (Publisher’s version ) (Open Access)

Published
2022

15. Risk scan of alien freshwater mollusks in The Netherlands

Author

Thunnissen, N.W., Collas, F.P.L., Jongejans, E., Velde, G. van der, Leuven, R.S.E.W., Thunnissen, N.W., Collas, F.P.L., Jongejans, E., Velde, G. van der, and Leuven, R.S.E.W.

Abstract

Session B-2: Ecological risks and impacts: molluscs, 18 april 2022, Item does not contain fulltext

Published
2022

16. Quantifying ecological risks of environmental stressors : The development, application, and evaluation of methodologies

Author

Leuven, R.S.E.W., Hendriks, A.J., Jongejans, E., Collas, F.P.L., Thunnissen, N.W., Leuven, R.S.E.W., Hendriks, A.J., Jongejans, E., Collas, F.P.L., and Thunnissen, N.W.

Abstract

Radboud University, 19 december 2022, Promotores : Leuven, R.S.E.W., Hendriks, A.J. Co-promotores : Jongejans, E., Collas, F.P.L., Contains fulltext : 285026.pdf (Publisher’s version ) (Open Access)

Published
2022

17. Emerging technologies revolutionise insect ecology and monitoring

Author

Klink, R. van, August, T., Bas, Y., Bodesheim, P., Bonn, A., Fossøy, F., Høye, T. T., Jongejans, E., Menz, M. H. M., Miraldo, A., Rosslin, T., Roy, H. E., Ruczyński, I., Schigel, D., Schäffler, L., Sheard, J. K., Svenningsen, C., Tschan, G. F., Wäldchen, J., Zizka, V. M. A., Åström, J., Bowler, D. E., Klink, R. van, August, T., Bas, Y., Bodesheim, P., Bonn, A., Fossøy, F., Høye, T. T., Jongejans, E., Menz, M. H. M., Miraldo, A., Rosslin, T., Roy, H. E., Ruczyński, I., Schigel, D., Schäffler, L., Sheard, J. K., Svenningsen, C., Tschan, G. F., Wäldchen, J., Zizka, V. M. A., Åström, J., and Bowler, D. E.

Abstract

Contains fulltext : 282484.pdf (Publisher’s version ) (Open Access)

Published
2022

18. Integrated population modeling identifies low duckling survival as a key driver of decline in a European population of the Mallard

Author

Wiegers, J.N., Jongejans, E., Turnhout, C.A.M. van, Bremer, L. van den, Jeugd, H. van der, Kleyheeg, E., Wiegers, J.N., Jongejans, E., Turnhout, C.A.M. van, Bremer, L. van den, Jeugd, H. van der, and Kleyheeg, E.

Abstract

20 mei 2022, Contains fulltext : 252382.pdf (Publisher’s version ) (Open Access), Europe’s highest densities of breeding Mallards (Anas platyrhynchos) are found in the Netherlands, but the breeding population there has declined by ~30% since the 1990s. The exact cause of this decline has remained unclear. Here, we used an integrated population model to jointly analyze Mallard population survey, nest survey, duckling survival and band-recovery data. We used this approach to holistically estimate all relevant vital rates, including duckling survival rates for years for which no explicit data were available. Mean vital rate estimates were high for nest success (0.38 ±0.01) and egg hatch rate (0.96 ±0.001), but relatively low for clutch size (8.2 ±0.05) compared to populations in other regions. Estimates for duckling survival rate for the three years for which explicit data were available were low (0.16-0.27) compared to historical observations, but were comparable to rates reported for other regions with declining populations. Finally, mean survival rate was low for ducklings (0.18 ±0.02), but high and stable for adults (0.71 ±0.03). Population growth rate was only affected by variation in duckling survival, but since this is a predominantly latent state variable, this result should be interpreted with caution. However, it does strongly indicate that none of the other vital rates, all of which were supported by data, was able to sufficiently explain the population decline. Together with a comparison with historic vital rates, these findings point to a reduced duckling survival rate as the likely cause of the decline. Candidate drivers of reduced duckling survival are increased predation pressure and reduced food availability, but this requires future study. Integrated population modeling can provide valuable insights into population dynamics even when empirical data for a key parameter are partly missing. Methods We built an Integrated Population Model (IPM) and fitted parameters with four datasets: (1) population survey data, (2) nest survey data

Published
2022

20. Risk scan of alien freshwater mollusks in The Netherlands

Author

Hoffman, M., Thunnissen, N.W., Collas, F.P.L., Jongejans, E., Velde, G. van der, Leuven, R.S.E.W., Hoffman, M., Thunnissen, N.W., Collas, F.P.L., Jongejans, E., Velde, G. van der, and Leuven, R.S.E.W.

Abstract

ICAIS, 18 april 2022, Contains fulltext : 287699.pdf (Publisher’s version ) (Open Access)

Published
2022

21. Emerging technologies revolutionise insect ecology and monitoring

Author

van Klink, R., August, T., Bas, Y., Bodesheim, P., Bonn, Aletta, Fossøy, F., Høye, T.T., Jongejans, E., Menz, M.H.M., Miraldo, A., Roslin, T., Roy, H.E., Ruczyński, I., Schigel, D., Schäffler, L., Sheard, Julie, Svenningsen, C., Tschan, G.F., Wäldchen, J., Zizka, V.M.A., Åström, J., Bowler, Diana, van Klink, R., August, T., Bas, Y., Bodesheim, P., Bonn, Aletta, Fossøy, F., Høye, T.T., Jongejans, E., Menz, M.H.M., Miraldo, A., Roslin, T., Roy, H.E., Ruczyński, I., Schigel, D., Schäffler, L., Sheard, Julie, Svenningsen, C., Tschan, G.F., Wäldchen, J., Zizka, V.M.A., Åström, J., and Bowler, Diana

Abstract

Insects are the most diverse group of animals on Earth, but their small size and high diversity have always made them challenging to study. Recent technological advances have the potential to revolutionise insect ecology and monitoring. We describe the state of the art of four technologies (computer vision, acoustic monitoring, radar, and molecular methods), and assess their advantages, current limitations, and future potential. We discuss how these technologies can adhere to modern standards of data curation and transparency, their implications for citizen science, and their potential for integration among different monitoring programmes and technologies. We argue that they provide unprecedented possibilities for insect ecology and monitoring, but it will be important to foster international standards via collaboration.

Published
2022

22. Efficient use of demographic data

Author

Gamelon, M., Vriend, S., Visser, M.E., Hallmann, C.A., Lommen, S.T.E., Jongejans, E., Salguero Gómez, R., Salguero-Gomez, R., Gamelon, M., Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), and Animal Ecology (AnE)

Subjects
Population models, Animal Ecology and Physiology, Blue tit, Plant Ecology, 15. Life on land, Animal Breeding and Genomics, Bayesian, [SDE]Environmental Sciences, Vital rates, Fokkerij en Genomica, Population censuses, ComputingMilieux_MISCELLANEOUS, Demography, Common ragweed
Abstract

Various types of demographic data can be collected in the field: population censuses, capture–mark–recapture data, and so on. These data sources share common demographic information about the studied population. Bayesian integrated population models (IPM) make efficient use of these different types of demographic data by jointly analysing them. This chapter discusses the advantages and the possibilities offered by this integrated approach. It describes the different steps required to build an IPM and illustrates the usefulness of this approach using two case studies. The first case study is a short-lived bird species, the blue tit, taking advantage of different data sources collected in a Dutch population to highlight how an integrated analysis might help to obtain a comprehensive picture of its dynamics. This IPM also assesses whether and how beech crop size might influence vital rates. The second case study is an invasive plant species, the common ragweed. The chapter illustrates how seedling data, plant data, and seed bank data could be analysed simultaneously to estimate key vital rates such as the probability that a seedling survives up to flowering.

Published
2021

23. Connecting foraging and roosting areas reveals how food stocks explain shorebird numbers

Author

Bakker, W.J., Ens, B.J., Dokter, A.M., van der Kolk, H.-J., Rappoldt, K., van de Pol, M., Troost, K., van der Veer, H.W., Bijleveld, A.I., van der Meer, J., Oosterbeek, K., Jongejans, E., and Allen, A.M.

Subjects
Haematopus
Abstract

Shorebird populations, especially those feeding on shellfish, have strongly declined in recent decades and identifying the drivers of these declines is important for conservation. Changing food stocks are thought to be a key driver of these declines and may also explain why trends have not been uniform across Europe's largest estuary. We therefore investigated howwinter population trends of Eurasian oystercatchers ( Haematopus ostralegus) were linked to food availability in the Dutch Wadden Sea. Our analysis incorporated two spatial scales, a smaller scale focused on roost counting areas and food available to birds in these areas and a larger spatial scale of tidal basins. A novelty in our study is that we quantify the connectivity between roosting and foraging areas, identified from GPS tracking data. This allowed us to estimate food available to roosting birds and thus how food availability may explain local population trends. At the smaller spatial scale of roost counting areas, there was no clear relationship between available food and the number of roosting oystercatchers, indicating that other factors may drive population fluctuations at finer spatial scales. At the scale of tidal basins, however, there was a significant relationship between population trends and available food, especially cockle Cerastoderma edule,. Mortality and recruitment alone could not account for the large fluctuations in bird counts, suggesting that the site choice of wintering migratory oystercatchers may primarily drive these large fluctuations. Furthermore, the relationship between oystercatcher abundance and benthic food stocks, suggests winter shorebird counts could act as ecological indicators of ecosystem health, informing about the winter status of food stocks at a spatial scale of tidal basins.

Published
2021

26. Efficient use of demographic data: integrated population models

Author

Salguero-Gomez, R., Gamelon, M., Gamelon, M., Vriend, S.J.G., Visser, M.E., Hallmann, C.A., Jongejans, E., Salguero-Gomez, R., Gamelon, M., Gamelon, M., Vriend, S.J.G., Visser, M.E., Hallmann, C.A., and Jongejans, E.

Abstract

Item does not contain fulltext

Published
2021

27. Diversity and functionality of soil fauna

Author

Siepel, H., Jongejans, E., Guo, Y., Siepel, H., Jongejans, E., and Guo, Y.

Abstract

Radboud University, 15 december 2021, Promotor : Siepel, H. Co-promotor : Jongejans, E., Contains fulltext : 241077.pdf (Publisher’s version ) (Open Access)

Published
2021

28. Stay or fly away? Impact of human disturbance on shorebird individuals and populations

Author

Kroon, H. de, Pol, M. van der, Jongejans, E., Ens, B.J., Kolk, H. van der, Kroon, H. de, Pol, M. van der, Jongejans, E., Ens, B.J., and Kolk, H. van der

Abstract

Radboud University, 23 juni 2021, Promotor : Kroon, H. de Co-promotores : Pol, M. van der, Jongejans, E., Ens, B.J., Contains fulltext : 233869.pdf (Publisher’s version ) (Open Access)

Published
2021

29. Connecting foraging and roosting areas reveals how food stocks explain shorebird numbers

Author

Bakker, Wiene, Ens, Bruno J., Dokter, A.M., Kolk, Henk-Jan van der, Rappoldt, Kees, Pol, Martijn van de, Jongejans, E., Allen, A.M., Bakker, Wiene, Ens, Bruno J., Dokter, A.M., Kolk, Henk-Jan van der, Rappoldt, Kees, Pol, Martijn van de, Jongejans, E., and Allen, A.M.

Abstract

Contains fulltext : 236881.pdf (Publisher’s version ) (Open Access)

Published
2021

31. Risicoscan van exotische mierensoorten in Nederland

Author

Thunnissen, N.W., Collas, F.P.L., Jongejans, E., Noordijk, J., Loon, A.J. van, Leuven, R.S.E.W., Thunnissen, N.W., Collas, F.P.L., Jongejans, E., Noordijk, J., Loon, A.J. van, and Leuven, R.S.E.W.

Abstract

Het primaire doel van het voorliggende onderzoek is het analyseren van de introductieroutes (‘pathways’), verspreiding en risico’s van vestiging in het wild van (potentieel) invasieve mieren in Nederland. Hieruit zijn negen onderzoeksvragen afgeleid: 1. Welke uitheemse mierensoorten zijn in Nederland geïntroduceerd en te verwachten op grond van vestiging in omliggende landen of gebieden met vergelijkbaar klimaat? 2. Welke uitheemse mieren hebben zich in Nederland gevestigd en in welke mate hebben deze soorten zich verspreid in de natuur? 3. Welke uitheemse soorten zijn nog (vrijwel) alleen te vinden binnenshuis en kunnen zich mogelijk in de toekomst in het buitengebied vestigen? 4. Via welke routes worden uitheemse mieren in Nederland geïntroduceerd en verspreid? 5. Hoe ontwikkelt het aantal gevestigde (potentieel) invasieve mierensoorten die in Nederland zijn geïntroduceerd door de tijd heen? 6. Wat zijn de (potentiële) risico’s van deze uitheemse soorten voor biodiversiteit, plantenteelt, dierhouderij, functioneren van ecosystemen, ecosysteemdiensten, volksgezondheid, infrastructuur en veiligheid in Nederland en in omliggende landen? 7. Wat is bekend over de maatschappelijke kosten en baten van de geïntroduceerde soorten? 8. Welke beheersmaatregelen zijn mogelijk om de introductie en verspreiding van uitheemse mieren te beperken? 9. Hoe zijn uitheemse mieren te identificeren en in hoeverre is dit nodig om mogelijke beheersmaatregelen te kunnen uitvoeren?

Published
2021

32. Diversiteit aan aquatische insecten afgelopen 30 jaar toegenomen, aantal individuen gehalveerd

Author

Jongejans, E., Zeegers, T., Jongejans, E., and Zeegers, T.

Abstract

De diversiteit aan watergebonden insecten, en daarmee de natuurkwaliteit van het oppervlaktewater van de onderzochte delen in Nederland, is de afgelopen drie decennia toegenomen. Het aantal insecten dat gebaat is bij een goede waterkwaliteit, zoals kokerjuffers en libellen, nam toe. Tegelijkertijd nam het totaal aantal individuen van watergebonden insecten met de helft af.

Published
2021

33. Invloed van pesticiden op boerenlandvogels. Is de bewijsvoering rond?

Author

Foppen, R., Hallmann, C., Turnhout, C. van, Hofland, N., Kroon, H. de, Jongejans, E., Foppen, R., Hallmann, C., Turnhout, C. van, Hofland, N., Kroon, H. de, and Jongejans, E.

Abstract

De stand van de boerenlandvogels is de laatste decennia in razend tempo afgenomen. De belangrijkste reden hiervoor is de toenemende intensivering van het agrarisch gebruik. Die intensivering gaat gepaard met onder meer het veelvuldig gebruik van bestrijdingsmiddelen (pesticiden). Een artikel dat we publiceerden in het wetenschappelijk tijdschrift Nature plaatst de zogenaamde neonicotinoïden in het verdachtenbankje (Hallmann et al. 2014). In dit verhaal wordt deze studie in het perspectief geplaatst van de kennis over de manier waarop deze middelen tot achteruitgang kunnen leiden en welke kennis nog ontbreekt om de bewijsvoering rond te krijgen.

Published
2021

34. Risicobeoordeling van uitheemse landplatwormen

Author

Thunnissen, N.W., Collas, F.P.L., Jongejans, E., Velde, G. van der, Waart, S. de, and Leuven, R.S.E.W.

Subjects
Animal Ecology and Physiology, Environmental Sciences
Abstract

Contains fulltext : 228608.pdf (Publisher’s version ) (Open Access)

Published
2020

35. The population dynamics of the Caribbean flamingo on Bonaire

Author

Amorij, T., Denneman, B., Foppen, R.P., and Jongejans, E.

Subjects
Animal Ecology and Physiology, Report Department Animal Ecology and Physiology
Abstract

Contains fulltext : 235563.pdf (Publisher’s version ) (Open Access) . 12 p.

Published
2020

43. Comments to “Persistent problems in the construction of matrix population models”

Author

Che-Castaldo, Judy, Jones, Owen R., Kendall, Bruce E., Burns, Jean H., Childs, Dylan Z., Ezard, Thomas H.G., Hernandez-Yanez, Haydee, Hodgson, David J., Jongejans, E., Knight, Tiffany, Merow, Cory, Ramula, Satu, Stott, Iain, Vindenes, Yngvild, Yokomizo, Hiroyuki, Salguero-Gómez, Roberto, Che-Castaldo, Judy, Jones, Owen R., Kendall, Bruce E., Burns, Jean H., Childs, Dylan Z., Ezard, Thomas H.G., Hernandez-Yanez, Haydee, Hodgson, David J., Jongejans, E., Knight, Tiffany, Merow, Cory, Ramula, Satu, Stott, Iain, Vindenes, Yngvild, Yokomizo, Hiroyuki, and Salguero-Gómez, Roberto

Abstract

Contains fulltext : 216824.pdf (Publisher’s version ) (Open Access)

Published
2020

44. Is the insect apocalypse upon us? How to find out

Author

Montgomery, Graham A., Dunn, Robert R., Fox, Richard, Jongejans, E., Leather, Simon R., Saunders, Manu E., Shortall, Chris R., Tingley, Morgan W., Wagner, David L., Montgomery, Graham A., Dunn, Robert R., Fox, Richard, Jongejans, E., Leather, Simon R., Saunders, Manu E., Shortall, Chris R., Tingley, Morgan W., and Wagner, David L.

Abstract

Contains fulltext : 216784pos.pdf (Author’s version postprint ) (Open Access) Contains fulltext : 216784.pdf (Publisher’s version ) (Open Access)

Published
2020

46. Seasonal survival and migratory connectivity of a partially migratory wading bird revealed by citizen science

Author

Allen, Andrew, Ens, B.J., Van de Pol, M., van der Jeugd, H.P., Frauendorf, M., Oosterbeek, K.H., Jongejans, E., Animal Ecology (AnE), and Dutch Centre for Avian Migration & Demography

Subjects
national
Abstract

Migratory connectivity describes linkages between breeding and non-breeding areas. An ongoing challenge is tracking avian species between breeding and non-breeding areas and hence estimating migratory connectivity and seasonal survival. Collaborative color-ringing projects between researchers and citizen scientists provide opportunities for tracking the annual movements of avian species. Our study describes seasonal survival and migratory connectivity using data from more than 4,600 individuals with over 51,000 observations, predominantly collected by citizen scientists. Our study focuses on the Eurasian Oystercatcher (Haematopus ostralegus), a species that has experienced a substantial and ongoing decline in recent decades. Multiple threats have been described, and given that these threats vary in space and time, there is an urgent need to estimate demographic rates at the appropriate spatio-temporal scale. We performed a seasonal multi-state (5 geographical areas within The Netherlands) live- and dead-recoveries analysis under varying model structures to account for biological and data complexity. Coastal breeding populations were largely sedentary, while inland breeding populations were migratory and the direction of migration varied among areas, which has not been described previously. Our results indicated that survival was lower during winter than summer and that survival was lower in inland areas compared with coastal areas. A concerning result was that seasonal survival of individuals over-wintering in the Wadden Sea, an internationally important site for over-wintering shorebirds, appeared to decline during the study period. We discuss the outcomes of our study, and how citizen science was integral for conducting this study. Our findings identify how the demographic rates of the oystercatcher vary in space and time, knowledge that is vital for generating hypotheses and prioritizing future research into the causes of decline.

Published
2019

47. Demografische analyses van Strandplevier en Bontbekplevier

Author

Roodbergen, M., Irsel, C.J.A.J. van, Jongejans, E., Foppen, R.P.B., Nienhuis, J., Jeugd, H. van der, Vries, L. de, and Stahl, J.

Subjects
Animal Ecology and Physiology, Sovon-rapport
Abstract

Contains fulltext : 228601.pdf (Publisher’s version ) (Open Access) 74 p.

Published
2019

Catalog

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