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Genetic structure, diversity and distribution of a threatened lizard affected by widespread habitat fragmentation

Citation

Senior, AF and Clemann, N and Gardner, MG and Harrisson, KA and While, GM and Chapple, DG, Genetic structure, diversity and distribution of a threatened lizard affected by widespread habitat fragmentation, Conservation Genetics pp. 1-15. ISSN 1566-0621 (2021) [Refereed Article]

Copyright Statement

© The Author(s), under exclusive licence to Springer Nature B.V. 202

DOI: doi:10.1007/s10592-021-01408-4

Abstract

Understanding the demographic consequences of habitat loss on populations is essential for the conservation of threatened species. The threatened swamp skink (Lissolepis coventryi) is restricted to fragmented wetland habitats in Victoria and southeast South Australia. It has experienced significant habitat loss in the last 150 years, particularly around the Melbourne metropolitan area, where several small and isolated populations remain. Using mtDNA and nuDNA SNPs, we examined distribution patterns and population structure to infer evolutionary history and genetic distinctiveness of populations throughout the species’ range. For populations in the Melbourne metropolitan area, we examined genetic diversity. We found the species to be highly divergent, separating into two distinct lineages to the east and west of Melbourne, likely due to geological and climate influences causing isolation of populations. Species’ detectability was low, particularly in the far east despite relatively intact habitat and presumed higher abundance. Melbourne populations showed signs of limited genetic diversity. We suggest that translocations to promote gene diversity amongst these populations, together with habitat restoration and protection, present an important management strategy for L. coventryi.

Item Details

Item Type:Refereed Article
Keywords:Australia, habitat loss, Lissolepis coventryi, swamp skink, threatened species
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Population ecology
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Terrestrial biodiversity
UTAS Author:While, GM (Dr Geoff While)
ID Code:147577
Year Published:2021
Funding Support:Australian Research Council (DP150102900)
Deposited By:Zoology
Deposited On:2021-11-09
Last Modified:2021-12-01
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