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 specializ...
Published in: | Journal of Animal Ecology |
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Online Access: | https://hdl.handle.net/10067/1628040151162165141 https://repository.uantwerpen.be/docman/irua/ab325b/162804.pdf |
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ftunivantwerpen:c:irua:162804 2024-10-06T13:44:19+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, Loic N. Southwell, Colin Sumner, Michael D. Eens, Marcel Emmerson, Louise 2020 pdf https://hdl.handle.net/10067/1628040151162165141 https://repository.uantwerpen.be/docman/irua/ab325b/162804.pdf eng eng info:eu-repo/semantics/altIdentifier/doi/10.1111/1365-2656.13078 info:eu-repo/semantics/altIdentifier/isi/000485228000001 info:eu-repo/semantics/openAccess 0021-8790 The journal of animal ecology Chemistry Biology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2020 ftunivantwerpen https://doi.org/10.1111/1365-2656.13078 2024-09-10T04:06:39Z 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, no ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Cape Petrels Daption capense Prydz Bay Thalassoica antarctica IRUA - Institutional Repository van de Universiteit Antwerpen Antarctic Prydz Bay Journal of Animal Ecology 89 1 104 119 |
institution |
Open Polar |
collection |
IRUA - Institutional Repository van de Universiteit Antwerpen |
op_collection_id |
ftunivantwerpen |
language |
English |
topic |
Chemistry Biology |
spellingShingle |
Chemistry Biology Dehnhard, Nina Achurch, Helen Clarke, Judy Michel, Loic 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? |
topic_facet |
Chemistry Biology |
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, no ... |
format |
Article in Journal/Newspaper |
author |
Dehnhard, Nina Achurch, Helen Clarke, Judy Michel, Loic N. Southwell, Colin Sumner, Michael D. Eens, Marcel Emmerson, Louise |
author_facet |
Dehnhard, Nina Achurch, Helen Clarke, Judy Michel, Loic 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? |
publishDate |
2020 |
url |
https://hdl.handle.net/10067/1628040151162165141 https://repository.uantwerpen.be/docman/irua/ab325b/162804.pdf |
geographic |
Antarctic Prydz Bay |
geographic_facet |
Antarctic Prydz Bay |
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 |
0021-8790 The journal of animal ecology |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/1365-2656.13078 info:eu-repo/semantics/altIdentifier/isi/000485228000001 |
op_rights |
info:eu-repo/semantics/openAccess |
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_ |
1812182725514231808 |