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Emigration is costly, but immigration has benefits in human-altered landscapes


Brook, BW and Buettel, JC, Emigration is costly, but immigration has benefits in human-altered landscapes, Functional Ecology, 30, (9) pp. 1478-1479. ISSN 0269-8463 (2016) [Contribution to Refereed Journal]

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DOI: doi:10.1111/1365-2435.12639


Fragmented habitats are a signature of anthropogenically disturbed landscapes. When human activities act to disaggregate once-contiguous forest or other terrestrial ecosystems, and convert intervening spaces into a ‘matrix’ of agriculture, roads and urban areas, it can be difficult for resident species to sustain connected populations (Saunders, Hobbs & Margules 1991). Dispersal ability and inter-patch migration rates are therefore important determinants of a species’ ability to persist and navigate throughout these human-altered environments. But mobility can also be a double-edged sword (Fahrig 2007). Movement involves certain risk to individuals, resulting in costs to energy expenditure that amplifies with time spent moving, and increased mortality risk that has the potential to deplete source populations of potential future breeders. The trade-off between the benefits and costs of mobility in fragmented landscapes and its implications for extinction risk have consequently been a central problem for conservation.

Item Details

Item Type:Contribution to Refereed Journal
Keywords:emigration, immigration, human-altered landscapes, habitats, dispersal
Research Division:Environmental Sciences
Research Group:Environmental management
Research Field:Conservation and biodiversity
Objective Division:Environmental Management
Objective Group:Management of Antarctic and Southern Ocean environments
Objective Field:Assessment and management of Antarctic and Southern Ocean ecosystems
UTAS Author:Brook, BW (Professor Barry Brook)
UTAS Author:Buettel, JC (Dr Jessie Buettel)
ID Code:117209
Year Published:2016
Web of Science® Times Cited:2
Deposited By:Biological Sciences
Deposited On:2017-06-02
Last Modified:2017-06-02

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