Density-dependent increase in superpredation linked to food limitation in a recovering population of northern goshawks Accipiter gentilis
International audience A better understanding of the mechanisms driving superpredation, the killing of smaller mesopredators by larger apex predators, is important because of the crucial role superpredation can play in structuring communities and because it often involves species of conservation con...
Published in: | Journal of Avian Biology |
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Main Authors: | , , , , , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2017
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Online Access: | https://hal.archives-ouvertes.fr/hal-01768454 https://hal.archives-ouvertes.fr/hal-01768454/document https://hal.archives-ouvertes.fr/hal-01768454/file/Hoy%20et%20al.%202017%20JAB%20Final%20version%20for%20repository%20%281%29.pdf https://doi.org/10.1111/jav.01387 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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language |
English |
topic |
mesopredator predatory interactions falco tinnunculus mesopredator suppression intraguild predation food-stress hypothesis [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/Symbiosis [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
mesopredator predatory interactions falco tinnunculus mesopredator suppression intraguild predation food-stress hypothesis [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/Symbiosis [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Hoy, S., Petty, S., Millon, A. Whitfield, D., Marquiss, M. Anderson, D. I. K. Davison, M. Lambin, X. Density-dependent increase in superpredation linked to food limitation in a recovering population of northern goshawks Accipiter gentilis |
topic_facet |
mesopredator predatory interactions falco tinnunculus mesopredator suppression intraguild predation food-stress hypothesis [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/Symbiosis [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience A better understanding of the mechanisms driving superpredation, the killing of smaller mesopredators by larger apex predators, is important because of the crucial role superpredation can play in structuring communities and because it often involves species of conservation concern. Here we document how the extent of superpredation has changed over time, and assessed the impact of such temporal variation on local mesopredator populations using 40 yr of dietary data collected from a recovering population of northern goshawks Accipiter gentilis, an archetypical avian superpredator. We then assessed which mechanisms were driving variation in superpredation, e.g. was it opportunistic, a response to food becoming limited (due to declines in preferred prey) or to reduce competition. Raptors comprised 8% of goshawk diet on average in years when goshawk abundance was high, which is higher than reported elsewhere. Additionally, there was a per capita increase in superpredation as goshawks recovered, with the proportion of goshawk diet comprising raptors increasing from 2 to 8% as the number of goshawk home‐ranges increased from ≤ 14 to ≥ 25. This increase in superpredation coincided with a population decline in the most commonly killed mesopredator, the Eurasian kestrel Falco tinnunculus, which may represent the reversal of the ‘mesopredator release’ process (i.e. mesopredator suppression) which occurred after goshawks and other large raptors declined or were extirpated. Food limitation was the most likely driver of superpredation in this system given: 1) the substantial decline of two main prey groups in goshawk diet, the increase in diet diversity and decrease in goshawk reproductive success are all consistent with the goshawk population becoming food‐limited; 2) it's unlikely to be purely opportunistic as the increase in superpredation did not reflect changes in the availability of mesopredator species; and 3) the majority of mesopredators killed by goshawks do not compete with goshawks for ... |
author2 |
School of Biological Sciences Aberdeen University of Aberdeen Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE) Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement IRD : UMR237-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Hoy, S., Petty, S., Millon, A. Whitfield, D., Marquiss, M. Anderson, D. I. K. Davison, M. Lambin, X. |
author_facet |
Hoy, S., Petty, S., Millon, A. Whitfield, D., Marquiss, M. Anderson, D. I. K. Davison, M. Lambin, X. |
author_sort |
Hoy, S., |
title |
Density-dependent increase in superpredation linked to food limitation in a recovering population of northern goshawks Accipiter gentilis |
title_short |
Density-dependent increase in superpredation linked to food limitation in a recovering population of northern goshawks Accipiter gentilis |
title_full |
Density-dependent increase in superpredation linked to food limitation in a recovering population of northern goshawks Accipiter gentilis |
title_fullStr |
Density-dependent increase in superpredation linked to food limitation in a recovering population of northern goshawks Accipiter gentilis |
title_full_unstemmed |
Density-dependent increase in superpredation linked to food limitation in a recovering population of northern goshawks Accipiter gentilis |
title_sort |
density-dependent increase in superpredation linked to food limitation in a recovering population of northern goshawks accipiter gentilis |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.archives-ouvertes.fr/hal-01768454 https://hal.archives-ouvertes.fr/hal-01768454/document https://hal.archives-ouvertes.fr/hal-01768454/file/Hoy%20et%20al.%202017%20JAB%20Final%20version%20for%20repository%20%281%29.pdf https://doi.org/10.1111/jav.01387 |
genre |
Accipiter gentilis |
genre_facet |
Accipiter gentilis |
op_source |
ISSN: 0908-8857 EISSN: 1600-048X Journal of Avian Biology https://hal.archives-ouvertes.fr/hal-01768454 Journal of Avian Biology, Wiley, 2017, 48 (9), pp.1205-1215. ⟨10.1111/jav.01387⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/jav.01387 hal-01768454 https://hal.archives-ouvertes.fr/hal-01768454 https://hal.archives-ouvertes.fr/hal-01768454/document https://hal.archives-ouvertes.fr/hal-01768454/file/Hoy%20et%20al.%202017%20JAB%20Final%20version%20for%20repository%20%281%29.pdf doi:10.1111/jav.01387 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/jav.01387 |
container_title |
Journal of Avian Biology |
container_volume |
48 |
container_issue |
9 |
container_start_page |
1205 |
op_container_end_page |
1215 |
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1766254393323159552 |
spelling |
ftccsdartic:oai:HAL:hal-01768454v1 2023-05-15T13:00:34+02:00 Density-dependent increase in superpredation linked to food limitation in a recovering population of northern goshawks Accipiter gentilis Hoy, S., Petty, S., Millon, A. Whitfield, D., Marquiss, M. Anderson, D. I. K. Davison, M. Lambin, X. School of Biological Sciences Aberdeen University of Aberdeen Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE) Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement IRD : UMR237-Centre National de la Recherche Scientifique (CNRS) 2017 https://hal.archives-ouvertes.fr/hal-01768454 https://hal.archives-ouvertes.fr/hal-01768454/document https://hal.archives-ouvertes.fr/hal-01768454/file/Hoy%20et%20al.%202017%20JAB%20Final%20version%20for%20repository%20%281%29.pdf https://doi.org/10.1111/jav.01387 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/jav.01387 hal-01768454 https://hal.archives-ouvertes.fr/hal-01768454 https://hal.archives-ouvertes.fr/hal-01768454/document https://hal.archives-ouvertes.fr/hal-01768454/file/Hoy%20et%20al.%202017%20JAB%20Final%20version%20for%20repository%20%281%29.pdf doi:10.1111/jav.01387 info:eu-repo/semantics/OpenAccess ISSN: 0908-8857 EISSN: 1600-048X Journal of Avian Biology https://hal.archives-ouvertes.fr/hal-01768454 Journal of Avian Biology, Wiley, 2017, 48 (9), pp.1205-1215. ⟨10.1111/jav.01387⟩ mesopredator predatory interactions falco tinnunculus mesopredator suppression intraguild predation food-stress hypothesis [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology [SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/Symbiosis [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2017 ftccsdartic https://doi.org/10.1111/jav.01387 2021-11-07T03:03:12Z International audience A better understanding of the mechanisms driving superpredation, the killing of smaller mesopredators by larger apex predators, is important because of the crucial role superpredation can play in structuring communities and because it often involves species of conservation concern. Here we document how the extent of superpredation has changed over time, and assessed the impact of such temporal variation on local mesopredator populations using 40 yr of dietary data collected from a recovering population of northern goshawks Accipiter gentilis, an archetypical avian superpredator. We then assessed which mechanisms were driving variation in superpredation, e.g. was it opportunistic, a response to food becoming limited (due to declines in preferred prey) or to reduce competition. Raptors comprised 8% of goshawk diet on average in years when goshawk abundance was high, which is higher than reported elsewhere. Additionally, there was a per capita increase in superpredation as goshawks recovered, with the proportion of goshawk diet comprising raptors increasing from 2 to 8% as the number of goshawk home‐ranges increased from ≤ 14 to ≥ 25. This increase in superpredation coincided with a population decline in the most commonly killed mesopredator, the Eurasian kestrel Falco tinnunculus, which may represent the reversal of the ‘mesopredator release’ process (i.e. mesopredator suppression) which occurred after goshawks and other large raptors declined or were extirpated. Food limitation was the most likely driver of superpredation in this system given: 1) the substantial decline of two main prey groups in goshawk diet, the increase in diet diversity and decrease in goshawk reproductive success are all consistent with the goshawk population becoming food‐limited; 2) it's unlikely to be purely opportunistic as the increase in superpredation did not reflect changes in the availability of mesopredator species; and 3) the majority of mesopredators killed by goshawks do not compete with goshawks for ... Article in Journal/Newspaper Accipiter gentilis Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Journal of Avian Biology 48 9 1205 1215 |