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Landscape management of fire and grazing regimes alters the fine-scale habitat utilisation by feral cats

Citation

McGregor, HW and Legge, S and Jones, ME and Johnson, CN, Landscape management of fire and grazing regimes alters the fine-scale habitat utilisation by feral cats, PLoS One, 9, (10) Article e109097. ISSN 1932-6203 (2014) [Refereed Article]


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Licensed under Creative Commons Attribution 3.0 Unported (CC BY 3.0) http://creativecommons.org/licenses/by/3.0/

DOI: doi:10.1371/journal.pone.0109097

Abstract

Intensification of fires and grazing by large herbivores has caused population declines in small vertebrates in many ecosystems worldwide. Impacts are rarely direct, and usually appear driven via indirect pathways, such as changes to predator-prey dynamics. Fire events and grazing may improve habitat and/or hunting success for the predators of small mammals, however, such impacts have not been documented. To test for such an interaction, we investigated fine-scale habitat selection by feral cats in relation to fire, grazing and small-mammal abundance. Our study was conducted in northwestern Australia, where small mammal populations are sensitive to changes in fire and grazing management. We deployed GPS collars on 32 cats in landscapes with contrasting fire and grazing treatments. Fine-scale habitat selection was determined using discrete choice modelling of cat movements. We found that cats selected areas with open grass cover, including heavily-grazed areas. They strongly selected for areas recently burnt by intense fires, but only in habitats that typically support high abundance of small mammals. Intense fires and grazing by introduced herbivores created conditions that are favoured by cats, probably because their hunting success is improved. This mechanism could explain why, in northern Australia, impacts of feral cats on small mammals might have increased. Our results suggest the impact of feral cats could be reduced in most ecosystems by maximising grass cover, minimising the incidence of intense fires, and reducing grazing by large herbivores.

Item Details

Item Type:Refereed Article
Keywords:feral cat, fire ecology, threatened species, mammal declines
Research Division:Environmental Sciences
Research Group:Ecological Applications
Research Field:Invasive Species Ecology
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Flora, Fauna and Biodiversity at Regional or Larger Scales
Author:McGregor, HW (Dr Hugh McGregor)
Author:Jones, ME (Associate Professor Menna Jones)
Author:Johnson, CN (Professor Christopher Johnson)
ID Code:97207
Year Published:2014
Funding Support:Australian Research Council (LP100100033)
Web of Science® Times Cited:65
Deposited By:Zoology
Deposited On:2014-12-05
Last Modified:2017-10-31
Downloads:148 View Download Statistics

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