Anthropogenic food subsidies hinder the ecological role of wolves: Insights for conservation of apex predators in human-modified landscapes
In ecologically pristine ecosystems, top-down effects of apex predators play a fundamental role in shaping trophic cascades and structuring ecosystems, but in human-modified landscapes anthropogenic effects may markedly alter the ecological role of predators. In particular, human-provisioned food su...
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ftdoajarticles:oai:doaj.org/article:ac4c0766d95748a5b90d5c397430ad9b 2023-05-15T15:51:11+02:00 Anthropogenic food subsidies hinder the ecological role of wolves: Insights for conservation of apex predators in human-modified landscapes Paolo Ciucci Sara Mancinelli Luigi Boitani Orlando Gallo Lorenza Grottoli 2020-03-01T00:00:00Z https://doi.org/10.1016/j.gecco.2019.e00841 https://doaj.org/article/ac4c0766d95748a5b90d5c397430ad9b EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2351989419305840 https://doaj.org/toc/2351-9894 2351-9894 doi:10.1016/j.gecco.2019.e00841 https://doaj.org/article/ac4c0766d95748a5b90d5c397430ad9b Global Ecology and Conservation, Vol 21, Iss , Pp - (2020) Ecology QH540-549.5 article 2020 ftdoajarticles https://doi.org/10.1016/j.gecco.2019.e00841 2022-12-31T08:52:58Z In ecologically pristine ecosystems, top-down effects of apex predators play a fundamental role in shaping trophic cascades and structuring ecosystems, but in human-modified landscapes anthropogenic effects may markedly alter the ecological role of predators. In particular, human-provisioned food subsidies represent a serious concern for the conservation of apex predators, even though little empirical attention has been given to this aspect in assessing conservation outcomes. To assess the extent to which anthropogenic food subsidies affected feeding ecology of a protected wolf (Canis lupus) population in a human-modified landscape, we integrated scat-analysis (n = 1141 from 4 packs; Jan 2005–Mar 2009) and winter field inspections of Global Positioning System telemetry re-locations (n = 595 clusters and 96 single locations from 5 wolves in 5 packs and 3 floaters; 2008–2011) of wolves living in a historical national park of central Italy hosting both wild prey and livestock at high densities. We revealed that livestock dominated the wolf diet (mean biomass = 63.3 ± 14.2% SD), secondarily supplemented by wild prey (36.7 ± 5.3%, mostly wild boar [Sus scrofa], roe deer [Capreolus capreolus], and red deer [Cervus elaphus]). During winter, we revealed a higher propensity of wolves to scavenge (72.5%; n = 91 feeding events) rather than killing prey, and feeding behavior was affected by prey type (i.e., domestic vs wild ungulates) as the large majority of scavenged carrions (75.8%) were livestock carcasses abandoned on the ground that died for causes different from predation. Feeding behavior of wolves was not affected by social affiliation (i.e., pack members vs solitary wolves), indicating that pack members, even if aided by cooperative hunting, were equally likely than solitary wolves to scavenge rather than killing prey; yet, 27.5% of winter feeding events involved predation, exclusively targeted to wild prey. Our findings indicate that large livestock carrion subsidies may strongly depress predatory behavior in ... Article in Journal/Newspaper Canis lupus Directory of Open Access Journals: DOAJ Articles Global Ecology and Conservation 21 e00841 |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Ecology QH540-549.5 |
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Ecology QH540-549.5 Paolo Ciucci Sara Mancinelli Luigi Boitani Orlando Gallo Lorenza Grottoli Anthropogenic food subsidies hinder the ecological role of wolves: Insights for conservation of apex predators in human-modified landscapes |
topic_facet |
Ecology QH540-549.5 |
description |
In ecologically pristine ecosystems, top-down effects of apex predators play a fundamental role in shaping trophic cascades and structuring ecosystems, but in human-modified landscapes anthropogenic effects may markedly alter the ecological role of predators. In particular, human-provisioned food subsidies represent a serious concern for the conservation of apex predators, even though little empirical attention has been given to this aspect in assessing conservation outcomes. To assess the extent to which anthropogenic food subsidies affected feeding ecology of a protected wolf (Canis lupus) population in a human-modified landscape, we integrated scat-analysis (n = 1141 from 4 packs; Jan 2005–Mar 2009) and winter field inspections of Global Positioning System telemetry re-locations (n = 595 clusters and 96 single locations from 5 wolves in 5 packs and 3 floaters; 2008–2011) of wolves living in a historical national park of central Italy hosting both wild prey and livestock at high densities. We revealed that livestock dominated the wolf diet (mean biomass = 63.3 ± 14.2% SD), secondarily supplemented by wild prey (36.7 ± 5.3%, mostly wild boar [Sus scrofa], roe deer [Capreolus capreolus], and red deer [Cervus elaphus]). During winter, we revealed a higher propensity of wolves to scavenge (72.5%; n = 91 feeding events) rather than killing prey, and feeding behavior was affected by prey type (i.e., domestic vs wild ungulates) as the large majority of scavenged carrions (75.8%) were livestock carcasses abandoned on the ground that died for causes different from predation. Feeding behavior of wolves was not affected by social affiliation (i.e., pack members vs solitary wolves), indicating that pack members, even if aided by cooperative hunting, were equally likely than solitary wolves to scavenge rather than killing prey; yet, 27.5% of winter feeding events involved predation, exclusively targeted to wild prey. Our findings indicate that large livestock carrion subsidies may strongly depress predatory behavior in ... |
format |
Article in Journal/Newspaper |
author |
Paolo Ciucci Sara Mancinelli Luigi Boitani Orlando Gallo Lorenza Grottoli |
author_facet |
Paolo Ciucci Sara Mancinelli Luigi Boitani Orlando Gallo Lorenza Grottoli |
author_sort |
Paolo Ciucci |
title |
Anthropogenic food subsidies hinder the ecological role of wolves: Insights for conservation of apex predators in human-modified landscapes |
title_short |
Anthropogenic food subsidies hinder the ecological role of wolves: Insights for conservation of apex predators in human-modified landscapes |
title_full |
Anthropogenic food subsidies hinder the ecological role of wolves: Insights for conservation of apex predators in human-modified landscapes |
title_fullStr |
Anthropogenic food subsidies hinder the ecological role of wolves: Insights for conservation of apex predators in human-modified landscapes |
title_full_unstemmed |
Anthropogenic food subsidies hinder the ecological role of wolves: Insights for conservation of apex predators in human-modified landscapes |
title_sort |
anthropogenic food subsidies hinder the ecological role of wolves: insights for conservation of apex predators in human-modified landscapes |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://doi.org/10.1016/j.gecco.2019.e00841 https://doaj.org/article/ac4c0766d95748a5b90d5c397430ad9b |
genre |
Canis lupus |
genre_facet |
Canis lupus |
op_source |
Global Ecology and Conservation, Vol 21, Iss , Pp - (2020) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2351989419305840 https://doaj.org/toc/2351-9894 2351-9894 doi:10.1016/j.gecco.2019.e00841 https://doaj.org/article/ac4c0766d95748a5b90d5c397430ad9b |
op_doi |
https://doi.org/10.1016/j.gecco.2019.e00841 |
container_title |
Global Ecology and Conservation |
container_volume |
21 |
container_start_page |
e00841 |
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1766386253952974848 |