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Population structure and gene flow in the endangered southern brown bandicoot (Isoodon obesulus obesulus) across a fragmented landscape

Li, You, Lancaster, Melanie L., Cooper, Steven J. B., Taylor, Andrea C. and Carthew, Susan M. (2015). Population structure and gene flow in the endangered southern brown bandicoot (Isoodon obesulus obesulus) across a fragmented landscape. Conservation Genetics,16(2):331-345.

Document type: Journal Article
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IRMA ID 75039815xPUB540
Title Population structure and gene flow in the endangered southern brown bandicoot (Isoodon obesulus obesulus) across a fragmented landscape
Author Li, You
Lancaster, Melanie L.
Cooper, Steven J. B.
Taylor, Andrea C.
Carthew, Susan M.
Journal Name Conservation Genetics
Publication Date 2015
Volume Number 16
Issue Number 2
ISSN 1566-0621   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-84925537875
Start Page 331
End Page 345
Total Pages 15
Place of Publication Netherlands
Publisher Springer Netherlands
Field of Research 0502 - Environmental Science and Management
HERDC Category C1 - Journal Article (DIISR)
Abstract Habitat destruction is one of the leading threats to biodiversity. It results in the contraction and fragmentation of species’ distributions, enhancing the potential for extinction through the isolation of species in small populations. For conservation of threatened species, it is important to assess how fragmentation influences genetic connectivity of populations. The latter is dependent on the biology of individual species and the nature of the intervening matrix. In this study, we investigated genetic connectivity for an endangered marsupial, the southern brown bandicoot (Isoodon obesulus obesulus) from a fragmented forest system in south-east South Australia. We genotyped 15 microsatellite loci from 147 samples collected from 14 native forest patches, each surrounded by a matrix of either Pinus radiata plantation or cleared agricultural land. Our results showed significant population genetic structuring at a fine spatial scale in the 520 km2 Mount Burr region, with samples grouping into three population clusters. Evidence for dispersal among habitat patches was limited and dispersal generally only occurred among neighbouring patches. Overall, the genetic structuring we have observed is likely to have resulted from fragmentation of the landscape. Our findings contribute crucial information for the physical positioning of habitat corridors in this area, and provide baseline data to enable the effectiveness of these corridors to be assessed in the future.
Keywords Dispersal
Genetic management
Habitat fragmentation
Population connectivity
Threatened species
DOI http://dx.doi.org/10.1007/s10592-014-0661-5   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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Created: Tue, 26 Jul 2016, 12:52:08 CST