High inter‐ and intraspecific niche overlap among three sympatrically breeding, closely related seabird species: Generalist foraging as an adaptation to a highly variable environment?
Abstract Ecological niche theory predicts sympatric species to show segregation in their spatio‐temporal habitat utilization or diet as a strategy to avoid competition. Similarly, within species individuals may specialize on specific dietary resources or foraging habitats. Such individual specializa...
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Online Access: | http://dx.doi.org/10.1111/1365-2656.13078 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13078 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2656.13078 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13078 |
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crwiley:10.1111/1365-2656.13078 2024-09-15T17:46:59+00:00 High inter‐ and intraspecific niche overlap among three sympatrically breeding, closely related seabird species: Generalist foraging as an adaptation to a highly variable environment? Dehnhard, Nina Achurch, Helen Clarke, Judy Michel, Loïc N. Southwell, Colin Sumner, Michael D. Eens, Marcel Emmerson, Louise Fayet, Annette Bijzonder Onderzoeksfonds Fonds Wetenschappelijk Onderzoek 2019 http://dx.doi.org/10.1111/1365-2656.13078 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13078 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2656.13078 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13078 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Journal of Animal Ecology volume 89, issue 1, page 104-119 ISSN 0021-8790 1365-2656 journal-article 2019 crwiley https://doi.org/10.1111/1365-2656.13078 2024-08-13T04:19:03Z Abstract Ecological niche theory predicts sympatric species to show segregation in their spatio‐temporal habitat utilization or diet as a strategy to avoid competition. Similarly, within species individuals may specialize on specific dietary resources or foraging habitats. Such individual specialization seems to occur particularly in environments with predictable resource distribution and limited environmental variability. Still, little is known about how seasonal environmental variability affects segregation of resources within species and between closely related sympatric species. The aim of the study was to investigate the foraging behaviour of three closely related and sympatrically breeding fulmarine petrels (Antarctic petrels Thalassoica antarctica , cape petrels Daption capense and southern fulmars Fulmarus glacialoides ) in a seasonally highly variable environment (Prydz Bay, Antarctica) with the aim of assessing inter‐ and intraspecific overlap in utilized habitat, timing of foraging and diet and to identify foraging habitat preferences. We used GPS loggers with wet/dry sensors to assess spatial habitat utilization over the entire breeding season. Trophic overlap was investigated using stable isotope analysis based on blood, feathers and egg membranes. Foraging locations were identified using wet/dry data recorded by the GPS loggers and expectation‐maximization binary clustering. Foraging habitat preferences were modelled using generalized additive models and model cross‐validation. During incubation and chick‐rearing, the utilization distribution of all three species overlapped significantly and species also overlapped in the timing of foraging during the day—partly during incubation and completely during chick‐rearing. Isotopic centroids showed no significant segregation between at least two species for feathers and egg membranes, and among all species during incubation (reflected by blood). Within species, there was no individual specialization in foraging sites or environmental space. Furthermore, ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Cape Petrels Daption capense Prydz Bay Thalassoica antarctica Wiley Online Library Journal of Animal Ecology 89 1 104 119 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Ecological niche theory predicts sympatric species to show segregation in their spatio‐temporal habitat utilization or diet as a strategy to avoid competition. Similarly, within species individuals may specialize on specific dietary resources or foraging habitats. Such individual specialization seems to occur particularly in environments with predictable resource distribution and limited environmental variability. Still, little is known about how seasonal environmental variability affects segregation of resources within species and between closely related sympatric species. The aim of the study was to investigate the foraging behaviour of three closely related and sympatrically breeding fulmarine petrels (Antarctic petrels Thalassoica antarctica , cape petrels Daption capense and southern fulmars Fulmarus glacialoides ) in a seasonally highly variable environment (Prydz Bay, Antarctica) with the aim of assessing inter‐ and intraspecific overlap in utilized habitat, timing of foraging and diet and to identify foraging habitat preferences. We used GPS loggers with wet/dry sensors to assess spatial habitat utilization over the entire breeding season. Trophic overlap was investigated using stable isotope analysis based on blood, feathers and egg membranes. Foraging locations were identified using wet/dry data recorded by the GPS loggers and expectation‐maximization binary clustering. Foraging habitat preferences were modelled using generalized additive models and model cross‐validation. During incubation and chick‐rearing, the utilization distribution of all three species overlapped significantly and species also overlapped in the timing of foraging during the day—partly during incubation and completely during chick‐rearing. Isotopic centroids showed no significant segregation between at least two species for feathers and egg membranes, and among all species during incubation (reflected by blood). Within species, there was no individual specialization in foraging sites or environmental space. Furthermore, ... |
author2 |
Fayet, Annette Bijzonder Onderzoeksfonds Fonds Wetenschappelijk Onderzoek |
format |
Article in Journal/Newspaper |
author |
Dehnhard, Nina Achurch, Helen Clarke, Judy Michel, Loïc N. Southwell, Colin Sumner, Michael D. Eens, Marcel Emmerson, Louise |
spellingShingle |
Dehnhard, Nina Achurch, Helen Clarke, Judy Michel, Loïc N. Southwell, Colin Sumner, Michael D. Eens, Marcel Emmerson, Louise High inter‐ and intraspecific niche overlap among three sympatrically breeding, closely related seabird species: Generalist foraging as an adaptation to a highly variable environment? |
author_facet |
Dehnhard, Nina Achurch, Helen Clarke, Judy Michel, Loïc N. Southwell, Colin Sumner, Michael D. Eens, Marcel Emmerson, Louise |
author_sort |
Dehnhard, Nina |
title |
High inter‐ and intraspecific niche overlap among three sympatrically breeding, closely related seabird species: Generalist foraging as an adaptation to a highly variable environment? |
title_short |
High inter‐ and intraspecific niche overlap among three sympatrically breeding, closely related seabird species: Generalist foraging as an adaptation to a highly variable environment? |
title_full |
High inter‐ and intraspecific niche overlap among three sympatrically breeding, closely related seabird species: Generalist foraging as an adaptation to a highly variable environment? |
title_fullStr |
High inter‐ and intraspecific niche overlap among three sympatrically breeding, closely related seabird species: Generalist foraging as an adaptation to a highly variable environment? |
title_full_unstemmed |
High inter‐ and intraspecific niche overlap among three sympatrically breeding, closely related seabird species: Generalist foraging as an adaptation to a highly variable environment? |
title_sort |
high inter‐ and intraspecific niche overlap among three sympatrically breeding, closely related seabird species: generalist foraging as an adaptation to a highly variable environment? |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1111/1365-2656.13078 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13078 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2656.13078 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13078 |
genre |
Antarc* Antarctic Antarctica Cape Petrels Daption capense Prydz Bay Thalassoica antarctica |
genre_facet |
Antarc* Antarctic Antarctica Cape Petrels Daption capense Prydz Bay Thalassoica antarctica |
op_source |
Journal of Animal Ecology volume 89, issue 1, page 104-119 ISSN 0021-8790 1365-2656 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/1365-2656.13078 |
container_title |
Journal of Animal Ecology |
container_volume |
89 |
container_issue |
1 |
container_start_page |
104 |
op_container_end_page |
119 |
_version_ |
1810495452840198144 |