Trophic resource partitioning within a shorebird community feeding on intertidal mudflat habitats
International audience In ecological systems, it is necessary to describe the trophic niches of species and their segregation or overlap to understand the distribution of species in the community. In oceanic systems, the community structure of top predators such as seabird communities has been well...
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Online Access: | https://hal.science/hal-01072993 https://hal.science/hal-01072993/document https://hal.science/hal-01072993/file/Bocher_et_al_2014_JSR.pdf https://doi.org/10.1016/j.seares.2014.02.011 |
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ftunivnantes:oai:HAL:hal-01072993v1 2023-05-15T18:06:12+02:00 Trophic resource partitioning within a shorebird community feeding on intertidal mudflat habitats Bocher, Pierrick Robin, Frédéric Kojadinovic, Jessica Delaporte, Philippe Rousseau, Pierre Dupuy, Christine Bustamante, Paco LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Réserve Naturelle Nationale de Moёze-Oléron LPO 2014-09-15 https://hal.science/hal-01072993 https://hal.science/hal-01072993/document https://hal.science/hal-01072993/file/Bocher_et_al_2014_JSR.pdf https://doi.org/10.1016/j.seares.2014.02.011 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.seares.2014.02.011 hal-01072993 https://hal.science/hal-01072993 https://hal.science/hal-01072993/document https://hal.science/hal-01072993/file/Bocher_et_al_2014_JSR.pdf doi:10.1016/j.seares.2014.02.011 info:eu-repo/semantics/OpenAccess ISSN: 1385-1101 EISSN: 1873-1414 Journal of Sea Research (JSR) https://hal.science/hal-01072993 Journal of Sea Research (JSR), 2014, 92, pp.115-124. ⟨10.1016/j.seares.2014.02.011⟩ trophic level δ15N δ13C isotopic niches mudflat ecosystem Scolopacidae Charadriidae [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology info:eu-repo/semantics/article Journal articles 2014 ftunivnantes https://doi.org/10.1016/j.seares.2014.02.011 2023-03-08T07:38:48Z International audience In ecological systems, it is necessary to describe the trophic niches of species and their segregation or overlap to understand the distribution of species in the community. In oceanic systems, the community structure of top predators such as seabird communities has been well documented with many studies in several biogeographical areas. But for coastal habitats, very few investigations on the trophic structure have been carried out in avian communities. In this study, the trophic resource partitioning was investigated on eight of the most abundant species of a shorebird community on the central Atlantic coast of France. Our work comprised a comprehensive sample of birds with different ecomorphogical patterns and data on their main prey to encompass potential sources of overlap and segregation in this community. We examined the stable carbon (δ13C) and nitrogen (δ15N) isotopic composition of blood to investigate the trophic structure (1) on a temporal scale by comparing migration and wintering periods; (2) on a spatial scale through inter-site comparisons; and (3) on the community level within groups of phylogenetically related species. Diets appeared different in several cases between periods, between sites and between juveniles and adults for the same sites. A clear trophic partitioning was established with four functional groups of predators in winter inside the community. The Grey Plover, the Bar-tailed Godwit, the Curlew and a majority of the dunlins were worms-eater mainly feeding on Nereis diversicolor or Nephtys hombergii Two species were predominantly deposit-suspensivorous mollusc-eaters, including the Red Knot and the Black-tailed Godwit feeding mainly on Macoma balthica. The Oystercatcher fed mainly on suspensivorous molluscs like Cerastodrema edule and two species including the Redshank and some dunlins adopted opportunistic behaviours feeding on mudflat and/or in marshes. Article in Journal/Newspaper Red Knot black-tailed godwit Université de Nantes: HAL-UNIV-NANTES Journal of Sea Research 92 115 124 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
trophic level δ15N δ13C isotopic niches mudflat ecosystem Scolopacidae Charadriidae [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
spellingShingle |
trophic level δ15N δ13C isotopic niches mudflat ecosystem Scolopacidae Charadriidae [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology Bocher, Pierrick Robin, Frédéric Kojadinovic, Jessica Delaporte, Philippe Rousseau, Pierre Dupuy, Christine Bustamante, Paco Trophic resource partitioning within a shorebird community feeding on intertidal mudflat habitats |
topic_facet |
trophic level δ15N δ13C isotopic niches mudflat ecosystem Scolopacidae Charadriidae [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
description |
International audience In ecological systems, it is necessary to describe the trophic niches of species and their segregation or overlap to understand the distribution of species in the community. In oceanic systems, the community structure of top predators such as seabird communities has been well documented with many studies in several biogeographical areas. But for coastal habitats, very few investigations on the trophic structure have been carried out in avian communities. In this study, the trophic resource partitioning was investigated on eight of the most abundant species of a shorebird community on the central Atlantic coast of France. Our work comprised a comprehensive sample of birds with different ecomorphogical patterns and data on their main prey to encompass potential sources of overlap and segregation in this community. We examined the stable carbon (δ13C) and nitrogen (δ15N) isotopic composition of blood to investigate the trophic structure (1) on a temporal scale by comparing migration and wintering periods; (2) on a spatial scale through inter-site comparisons; and (3) on the community level within groups of phylogenetically related species. Diets appeared different in several cases between periods, between sites and between juveniles and adults for the same sites. A clear trophic partitioning was established with four functional groups of predators in winter inside the community. The Grey Plover, the Bar-tailed Godwit, the Curlew and a majority of the dunlins were worms-eater mainly feeding on Nereis diversicolor or Nephtys hombergii Two species were predominantly deposit-suspensivorous mollusc-eaters, including the Red Knot and the Black-tailed Godwit feeding mainly on Macoma balthica. The Oystercatcher fed mainly on suspensivorous molluscs like Cerastodrema edule and two species including the Redshank and some dunlins adopted opportunistic behaviours feeding on mudflat and/or in marshes. |
author2 |
LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Réserve Naturelle Nationale de Moёze-Oléron LPO |
format |
Article in Journal/Newspaper |
author |
Bocher, Pierrick Robin, Frédéric Kojadinovic, Jessica Delaporte, Philippe Rousseau, Pierre Dupuy, Christine Bustamante, Paco |
author_facet |
Bocher, Pierrick Robin, Frédéric Kojadinovic, Jessica Delaporte, Philippe Rousseau, Pierre Dupuy, Christine Bustamante, Paco |
author_sort |
Bocher, Pierrick |
title |
Trophic resource partitioning within a shorebird community feeding on intertidal mudflat habitats |
title_short |
Trophic resource partitioning within a shorebird community feeding on intertidal mudflat habitats |
title_full |
Trophic resource partitioning within a shorebird community feeding on intertidal mudflat habitats |
title_fullStr |
Trophic resource partitioning within a shorebird community feeding on intertidal mudflat habitats |
title_full_unstemmed |
Trophic resource partitioning within a shorebird community feeding on intertidal mudflat habitats |
title_sort |
trophic resource partitioning within a shorebird community feeding on intertidal mudflat habitats |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-01072993 https://hal.science/hal-01072993/document https://hal.science/hal-01072993/file/Bocher_et_al_2014_JSR.pdf https://doi.org/10.1016/j.seares.2014.02.011 |
genre |
Red Knot black-tailed godwit |
genre_facet |
Red Knot black-tailed godwit |
op_source |
ISSN: 1385-1101 EISSN: 1873-1414 Journal of Sea Research (JSR) https://hal.science/hal-01072993 Journal of Sea Research (JSR), 2014, 92, pp.115-124. ⟨10.1016/j.seares.2014.02.011⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.seares.2014.02.011 hal-01072993 https://hal.science/hal-01072993 https://hal.science/hal-01072993/document https://hal.science/hal-01072993/file/Bocher_et_al_2014_JSR.pdf doi:10.1016/j.seares.2014.02.011 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.seares.2014.02.011 |
container_title |
Journal of Sea Research |
container_volume |
92 |
container_start_page |
115 |
op_container_end_page |
124 |
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1766177789719871488 |