Unforeseen effects of supplementary feeding: ungulate baiting sites as hotspots for ground-nest predation.

Despite the ubiquity and magnitude of food provision to wildlife, our understanding of its ecological effects and conservation implications is very limited. Supplementary feeding of ungulates, still one of the main paradigms of game management in Europe, occurs in natural areas on an enormous scale....

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Autores principales:	Nuria Selva, Teresa Berezowska-Cnota, Isabel Elguero-Claramunt
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d4018b0332254fe5a2c0fdf47a2bd847
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spelling	oai:doaj.org-article:d4018b0332254fe5a2c0fdf47a2bd8472021-11-18T08:29:36ZUnforeseen effects of supplementary feeding: ungulate baiting sites as hotspots for ground-nest predation.1932-620310.1371/journal.pone.0090740https://doaj.org/article/d4018b0332254fe5a2c0fdf47a2bd8472014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24599216/?tool=EBIhttps://doaj.org/toc/1932-6203Despite the ubiquity and magnitude of food provision to wildlife, our understanding of its ecological effects and conservation implications is very limited. Supplementary feeding of ungulates, still one of the main paradigms of game management in Europe, occurs in natural areas on an enormous scale. We investigated the indirect effects of this practice on nest predation risk in the Polish Eastern Carpathians (Bieszczady Mountains). We hypothesized that the predators attracted to ungulate baiting sites would also forage for alternative prey nearby, increasing the nest predation risk for ground-nesting birds in the vicinity. We conducted a paired experiment by placing artificial nests (N=120) in feeding and control sites (N=12) at different distances from the ungulate feeding site. We also documented the use of three ungulate feeding sites by potential nest predators with automatic cameras. The proportion of depredated nests was 30% higher in the vicinity of feeding sites than at control sites (65%± 31.5 vs 35%± 32.1). The probability of a nest being depredated significantly increased with time and at shorter distances from the feeding site. We predicted that the area within 1-km distance from the feeding site would have a high risk (>0.5) of nest predation. We recorded 13 species of potential ground-nest predators at ungulate baiting sites. Most frequent were Eurasian jays Garrulus glandarius, mice and voles Muroidea, ravens Corvus corax, brown bears Ursus arctos, and wild boar Sus scrofa. Nest predators made most use of supplementary feeding sites (82% pictures with predators vs 8% with ungulates, the target group). Our study alerts of the impacts of ungulate feeding on alternative prey; this is of special concern when affecting protected species. We urge for a sensible management of ungulate feeding, which considers potential indirect effects on other species and the spatial and temporal components of food provision.Nuria SelvaTeresa Berezowska-CnotaIsabel Elguero-ClaramuntPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 3, p e90740 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Nuria Selva Teresa Berezowska-Cnota Isabel Elguero-Claramunt Unforeseen effects of supplementary feeding: ungulate baiting sites as hotspots for ground-nest predation.
description	Despite the ubiquity and magnitude of food provision to wildlife, our understanding of its ecological effects and conservation implications is very limited. Supplementary feeding of ungulates, still one of the main paradigms of game management in Europe, occurs in natural areas on an enormous scale. We investigated the indirect effects of this practice on nest predation risk in the Polish Eastern Carpathians (Bieszczady Mountains). We hypothesized that the predators attracted to ungulate baiting sites would also forage for alternative prey nearby, increasing the nest predation risk for ground-nesting birds in the vicinity. We conducted a paired experiment by placing artificial nests (N=120) in feeding and control sites (N=12) at different distances from the ungulate feeding site. We also documented the use of three ungulate feeding sites by potential nest predators with automatic cameras. The proportion of depredated nests was 30% higher in the vicinity of feeding sites than at control sites (65%± 31.5 vs 35%± 32.1). The probability of a nest being depredated significantly increased with time and at shorter distances from the feeding site. We predicted that the area within 1-km distance from the feeding site would have a high risk (>0.5) of nest predation. We recorded 13 species of potential ground-nest predators at ungulate baiting sites. Most frequent were Eurasian jays Garrulus glandarius, mice and voles Muroidea, ravens Corvus corax, brown bears Ursus arctos, and wild boar Sus scrofa. Nest predators made most use of supplementary feeding sites (82% pictures with predators vs 8% with ungulates, the target group). Our study alerts of the impacts of ungulate feeding on alternative prey; this is of special concern when affecting protected species. We urge for a sensible management of ungulate feeding, which considers potential indirect effects on other species and the spatial and temporal components of food provision.
format	article
author	Nuria Selva Teresa Berezowska-Cnota Isabel Elguero-Claramunt
author_facet	Nuria Selva Teresa Berezowska-Cnota Isabel Elguero-Claramunt
author_sort	Nuria Selva
title	Unforeseen effects of supplementary feeding: ungulate baiting sites as hotspots for ground-nest predation.
title_short	Unforeseen effects of supplementary feeding: ungulate baiting sites as hotspots for ground-nest predation.
title_full	Unforeseen effects of supplementary feeding: ungulate baiting sites as hotspots for ground-nest predation.
title_fullStr	Unforeseen effects of supplementary feeding: ungulate baiting sites as hotspots for ground-nest predation.
title_full_unstemmed	Unforeseen effects of supplementary feeding: ungulate baiting sites as hotspots for ground-nest predation.
title_sort	unforeseen effects of supplementary feeding: ungulate baiting sites as hotspots for ground-nest predation.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/d4018b0332254fe5a2c0fdf47a2bd847
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Unforeseen effects of supplementary feeding: ungulate baiting sites as hotspots for ground-nest predation.

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