Consistent seasonal foraging niche segregation between critically endangered Whenua Hou Diving Petrels and abundant Common Diving Petrels
Investigations into niche dynamics and interspecific interactions are crucial to assess the vulnerability of threatened species to competition and environmental change. The Whenua Hou Diving Petrel Pelecanoides whenuahouensis is a critically endangered seabird, specializing in breeding in sand dunes...
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Online Access: | https://hal.science/hal-04191388 https://hal.science/hal-04191388/document https://hal.science/hal-04191388/file/Tocker%20et%20al%202023%20Ibis.pdf https://doi.org/10.1111/ibi.13170 |
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ftunivrochelle:oai:HAL:hal-04191388v1 2024-02-11T10:08:53+01:00 Consistent seasonal foraging niche segregation between critically endangered Whenua Hou Diving Petrels and abundant Common Diving Petrels Tocker, Grace, E Fischer, Johannes, H Bustamante, Paco Guillou, Gaël Debski, Igor Taylor, Graeme, A Ritchie, Peter, A Wittmer, Heiko, U School of Biological Sciences Wellington, New Zealand Victoria University of Wellington LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) 2023 https://hal.science/hal-04191388 https://hal.science/hal-04191388/document https://hal.science/hal-04191388/file/Tocker%20et%20al%202023%20Ibis.pdf https://doi.org/10.1111/ibi.13170 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/ibi.13170 hal-04191388 https://hal.science/hal-04191388 https://hal.science/hal-04191388/document https://hal.science/hal-04191388/file/Tocker%20et%20al%202023%20Ibis.pdf doi:10.1111/ibi.13170 info:eu-repo/semantics/OpenAccess ISSN: 0019-1019 EISSN: 1474-919X Ibis https://hal.science/hal-04191388 Ibis, 2023, 165 (3), pp.890-904. ⟨10.1111/ibi.13170⟩ diet foraging habitat interspecific interactions niche overlap Pelecanoides stable isotope analyses trophic ecology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/Symbiosis info:eu-repo/semantics/article Journal articles 2023 ftunivrochelle https://doi.org/10.1111/ibi.13170 2024-01-23T23:34:09Z Investigations into niche dynamics and interspecific interactions are crucial to assess the vulnerability of threatened species to competition and environmental change. The Whenua Hou Diving Petrel Pelecanoides whenuahouensis is a critically endangered seabird, specializing in breeding in sand dunes in Aotearoa (New Zealand). The species is at risk from competition for burrow sites with the abundant, habitat‐generalist Common Diving Petrel Pelecanoides urinatrix chathamensis , among other terrestrial and near‐shore threats (storm‐induced erosion and vessel‐based light pollution). However, Whenua Hou Diving Petrel foraging niches at sea and associated threats are poorly understood. We sampled blood and feathers from both species on Whenua Hou (Codfish Island) during 2017–19 and used stable isotope (δ 15 N and δ 13 C) analyses to quantify foraging niche dynamics and interspecific interactions. During incubation periods, when birds are restricted by central place foraging, diving petrels exhibited clear niche segregation. Whenua Hou Diving Petrels were more generalist feeders with wider isotopic niches than Common Diving Petrels, which exhibited restricted isotopic niches and fed in neritic waters. During non‐breeding periods, foraging niches expanded, and segregation was reduced, as both species dispersed into the Southern Ocean. These patterns were largely consistent among years, despite varying climatic conditions. However, Common Diving Petrel foraging niches appeared to shrink during El Niño conditions, suggesting environmental sensitivity. In contrast, the consistently stable, generalist foraging niches of Whenua Hou Diving Petrels suggested potential limited sensitivity to competition and impacts of environmental change at sea. Recovery efforts should, therefore, focus on addressing the previously identified terrestrial and near‐shore threats. Article in Journal/Newspaper Southern Ocean HAL - Université de La Rochelle New Zealand Southern Ocean Ibis 165 3 890 904 |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
diet foraging habitat interspecific interactions niche overlap Pelecanoides stable isotope analyses trophic ecology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/Symbiosis |
spellingShingle |
diet foraging habitat interspecific interactions niche overlap Pelecanoides stable isotope analyses trophic ecology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/Symbiosis Tocker, Grace, E Fischer, Johannes, H Bustamante, Paco Guillou, Gaël Debski, Igor Taylor, Graeme, A Ritchie, Peter, A Wittmer, Heiko, U Consistent seasonal foraging niche segregation between critically endangered Whenua Hou Diving Petrels and abundant Common Diving Petrels |
topic_facet |
diet foraging habitat interspecific interactions niche overlap Pelecanoides stable isotope analyses trophic ecology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/Symbiosis |
description |
Investigations into niche dynamics and interspecific interactions are crucial to assess the vulnerability of threatened species to competition and environmental change. The Whenua Hou Diving Petrel Pelecanoides whenuahouensis is a critically endangered seabird, specializing in breeding in sand dunes in Aotearoa (New Zealand). The species is at risk from competition for burrow sites with the abundant, habitat‐generalist Common Diving Petrel Pelecanoides urinatrix chathamensis , among other terrestrial and near‐shore threats (storm‐induced erosion and vessel‐based light pollution). However, Whenua Hou Diving Petrel foraging niches at sea and associated threats are poorly understood. We sampled blood and feathers from both species on Whenua Hou (Codfish Island) during 2017–19 and used stable isotope (δ 15 N and δ 13 C) analyses to quantify foraging niche dynamics and interspecific interactions. During incubation periods, when birds are restricted by central place foraging, diving petrels exhibited clear niche segregation. Whenua Hou Diving Petrels were more generalist feeders with wider isotopic niches than Common Diving Petrels, which exhibited restricted isotopic niches and fed in neritic waters. During non‐breeding periods, foraging niches expanded, and segregation was reduced, as both species dispersed into the Southern Ocean. These patterns were largely consistent among years, despite varying climatic conditions. However, Common Diving Petrel foraging niches appeared to shrink during El Niño conditions, suggesting environmental sensitivity. In contrast, the consistently stable, generalist foraging niches of Whenua Hou Diving Petrels suggested potential limited sensitivity to competition and impacts of environmental change at sea. Recovery efforts should, therefore, focus on addressing the previously identified terrestrial and near‐shore threats. |
author2 |
School of Biological Sciences Wellington, New Zealand Victoria University of Wellington LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Tocker, Grace, E Fischer, Johannes, H Bustamante, Paco Guillou, Gaël Debski, Igor Taylor, Graeme, A Ritchie, Peter, A Wittmer, Heiko, U |
author_facet |
Tocker, Grace, E Fischer, Johannes, H Bustamante, Paco Guillou, Gaël Debski, Igor Taylor, Graeme, A Ritchie, Peter, A Wittmer, Heiko, U |
author_sort |
Tocker, Grace, E |
title |
Consistent seasonal foraging niche segregation between critically endangered Whenua Hou Diving Petrels and abundant Common Diving Petrels |
title_short |
Consistent seasonal foraging niche segregation between critically endangered Whenua Hou Diving Petrels and abundant Common Diving Petrels |
title_full |
Consistent seasonal foraging niche segregation between critically endangered Whenua Hou Diving Petrels and abundant Common Diving Petrels |
title_fullStr |
Consistent seasonal foraging niche segregation between critically endangered Whenua Hou Diving Petrels and abundant Common Diving Petrels |
title_full_unstemmed |
Consistent seasonal foraging niche segregation between critically endangered Whenua Hou Diving Petrels and abundant Common Diving Petrels |
title_sort |
consistent seasonal foraging niche segregation between critically endangered whenua hou diving petrels and abundant common diving petrels |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04191388 https://hal.science/hal-04191388/document https://hal.science/hal-04191388/file/Tocker%20et%20al%202023%20Ibis.pdf https://doi.org/10.1111/ibi.13170 |
geographic |
New Zealand Southern Ocean |
geographic_facet |
New Zealand Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0019-1019 EISSN: 1474-919X Ibis https://hal.science/hal-04191388 Ibis, 2023, 165 (3), pp.890-904. ⟨10.1111/ibi.13170⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/ibi.13170 hal-04191388 https://hal.science/hal-04191388 https://hal.science/hal-04191388/document https://hal.science/hal-04191388/file/Tocker%20et%20al%202023%20Ibis.pdf doi:10.1111/ibi.13170 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/ibi.13170 |
container_title |
Ibis |
container_volume |
165 |
container_issue |
3 |
container_start_page |
890 |
op_container_end_page |
904 |
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1790608518879903744 |