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Temporal refuges of a subordinate carnivore vary across rural–urban gradient

Animals exhibit variation in their space and time use across an urban–rural gradient. As the top‐down influences of apex predators wane due to human‐driven declines, landscape‐level anthropogenic pressures are rising. Human impacts can be analogous to apex predators in that humans can drive increase...

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Autores principales: Malhotra, Rumaan, Lima, Samantha, Harris, Nyeema C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9492470/
https://www.ncbi.nlm.nih.gov/pubmed/36188497
http://dx.doi.org/10.1002/ece3.9310
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author Malhotra, Rumaan
Lima, Samantha
Harris, Nyeema C.
author_facet Malhotra, Rumaan
Lima, Samantha
Harris, Nyeema C.
author_sort Malhotra, Rumaan
collection PubMed
description Animals exhibit variation in their space and time use across an urban–rural gradient. As the top‐down influences of apex predators wane due to human‐driven declines, landscape‐level anthropogenic pressures are rising. Human impacts can be analogous to apex predators in that humans can drive increased mortality in both prey species and carnivores, and impact communities through indirect fear effects and food subsidies. Here, we evaluate the time use of a common mesocarnivore across an urban–rural gradient and test whether it is influenced by the intensity of the use of a larger carnivore. Using multiple camera‐trap surveys, we compared the temporal response of a small carnivore, the raccoon (Procyon lotor), to the larger coyote (Canis latrans) in four study areas across Michigan that represented a gradient of pressure from humans. We found that raccoon time use varied by study area and was most unique at the rural extreme. Raccoons consistently did not shift their activity pattern in response to coyotes in the study area with the highest anthropogenic pressures despite the considerable interannual variation, and instead showed stronger responses to coyotes in more rural study areas. Temporal shifts were characterized by raccoons being more diurnal in areas of high coyote activity. We conclude that raccoons may shift time use in the presence of coyotes, dependent on the level of anthropogenic pressure. Our results highlight that the variation in raccoon time use across the entirety of the urban–rural gradient needed to be considered, as anthropogenic pressures may dominate and obscure the dynamics of this interaction.
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spelling pubmed-94924702022-09-30 Temporal refuges of a subordinate carnivore vary across rural–urban gradient Malhotra, Rumaan Lima, Samantha Harris, Nyeema C. Ecol Evol Research Articles Animals exhibit variation in their space and time use across an urban–rural gradient. As the top‐down influences of apex predators wane due to human‐driven declines, landscape‐level anthropogenic pressures are rising. Human impacts can be analogous to apex predators in that humans can drive increased mortality in both prey species and carnivores, and impact communities through indirect fear effects and food subsidies. Here, we evaluate the time use of a common mesocarnivore across an urban–rural gradient and test whether it is influenced by the intensity of the use of a larger carnivore. Using multiple camera‐trap surveys, we compared the temporal response of a small carnivore, the raccoon (Procyon lotor), to the larger coyote (Canis latrans) in four study areas across Michigan that represented a gradient of pressure from humans. We found that raccoon time use varied by study area and was most unique at the rural extreme. Raccoons consistently did not shift their activity pattern in response to coyotes in the study area with the highest anthropogenic pressures despite the considerable interannual variation, and instead showed stronger responses to coyotes in more rural study areas. Temporal shifts were characterized by raccoons being more diurnal in areas of high coyote activity. We conclude that raccoons may shift time use in the presence of coyotes, dependent on the level of anthropogenic pressure. Our results highlight that the variation in raccoon time use across the entirety of the urban–rural gradient needed to be considered, as anthropogenic pressures may dominate and obscure the dynamics of this interaction. John Wiley and Sons Inc. 2022-09-21 /pmc/articles/PMC9492470/ /pubmed/36188497 http://dx.doi.org/10.1002/ece3.9310 Text en © 2022 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Malhotra, Rumaan
Lima, Samantha
Harris, Nyeema C.
Temporal refuges of a subordinate carnivore vary across rural–urban gradient
title Temporal refuges of a subordinate carnivore vary across rural–urban gradient
title_full Temporal refuges of a subordinate carnivore vary across rural–urban gradient
title_fullStr Temporal refuges of a subordinate carnivore vary across rural–urban gradient
title_full_unstemmed Temporal refuges of a subordinate carnivore vary across rural–urban gradient
title_short Temporal refuges of a subordinate carnivore vary across rural–urban gradient
title_sort temporal refuges of a subordinate carnivore vary across rural–urban gradient
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9492470/
https://www.ncbi.nlm.nih.gov/pubmed/36188497
http://dx.doi.org/10.1002/ece3.9310
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