Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/114981
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Type: Journal article
Title: Consequences of impediments to animal movements at different scales: A conceptual framework and review
Author: Cosgrove, A.
Mcwhorter, T.
Maron, M.
Citation: Diversity and Distributions, 2018; 24(4):448-459
Publisher: Wiley
Issue Date: 2018
ISSN: 1366-9516
1472-4642
Statement of
Responsibility: 
Anita J. Cosgrove, Todd J. McWhorter, Martine Maron
Abstract: Aim: The persistence of animal populations depends on individuals moving successfully around a landscape, but habitat fragmentation can hinder this by reducing functional connectivity. The proximate cause of population declines in fragmented habitat is dependent on the spatial and temporal scales of movement restrictions. Location: Global. Methods: We present a conceptual framework highlighting the relationship between spatial and temporal scales, and three mechanisms through which detrimental impacts can occur when movement is disrupted in fragmented landscapes: limited resource access, restricted demographic exchange and impeded gene flow. We then review the literature to identify the proportion of studies conducted on each mechanism and whether biases existed in how often each was studied among different geographic zones or taxa. A random selection of 250 articles was classified by the mechanism, geographic region and taxon studied in each article. Results: Our conceptual framework highlighted that each of the three mechanisms tends to be characterized by movement restriction at progressively larger spatial and temporal scales. In our literature review, we found that the overwhelming majority (77%) of articles investigated impeded gene flow, and only 17% and 10% explored restricted demographic exchange and limited resource access, respectively. Work on limited resource access was disproportionately low for particular taxonomic groups, such as reptiles and amphibians. Main conclusions: Distinguishing which mechanisms are disrupted in a particular system is crucial because addressing each is likely to require a distinct conservation management response. We encourage greater focus on the less-studied mechanisms of restricted demographic exchange and limited resource access.
Rights: © 2017 John Wiley & Sons Ltd
RMID: 0030079874
DOI: 10.1111/ddi.12699
Grant ID: http://purl.org/au-research/grants/arc/FT140100516
Appears in Collections:Animal and Veterinary Sciences publications

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