干旱区生态环境知识资源中心(Arid): Evidence for multiple refugia and hotspots of genetic diversity for Westralunio carteri, a threatened freshwater mussel in south-western Australia

Arid

DOI	10.1002/aqc.3780
	Evidence for multiple refugia and hotspots of genetic diversity for Westralunio carteri, a threatened freshwater mussel in south-western Australia
	Benson, Justin; Stewart, Barbara; Close, Paul; Lymbery, Alan
通讯作者	Benson, J (corresponding author)，Univ Western Australia, UWA Sch Agr & Environm, 35 Stirling Terrace, Albany, WA 6330, Australia. ; Benson, J (corresponding author)，Univ Western Australia, Ctr Nat Resource Management, 35 Stirling Terrace, Albany, WA 6330, Australia.
来源期刊	AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
ISSN	1052-7613
EISSN	1099-0755
出版年	2022-02
英文摘要	Intraspecific genetic diversity provides the evolutionary potential to adapt to changing environments and 'hotspots' of high intraspecific diversity are recognized as key targets for conservation. In south-western Australia, intraspecific genetic diversity for mesic taxa is not uniformly distributed. Many species comprise highly divergent lineages with unique haplotypes resulting from contraction to refugia during historical arid cycles. Sampling strategies in studies of the region's unique and ancient freshwater fauna have often focused on broad distributional range, making it difficult to determine boundaries between lineages and the location of genetic hotspots. This study explored the spatial distribution of intraspecific genetic diversity in the threatened freshwater mussel, Westralunio carteri. Mitochondrial DNA sequences for 164 specimens, sampled from all basins within the distribution of the species, were used to describe lineage boundaries and the location of hotspots, and to reconstruct historical demographics. There was strong evidence for three subregions of genetic diversity based on the largely non-overlapping distributions of three evolutionarily significant units. Spatial and demographic analyses suggest that these evolutionarily significant units persisted through past arid cycles in separate refugia. The majority of haplotypes were unique to a single location, indicating limited connectivity among populations in recent times. Hotspots were identified throughout the region. Most notably, a significant hotspot in the south-western corner probably arose through the overlap of lineages in historical refugia. Conservation assessments often focus on the species as a whole, even though sublineages, hotspots and the threats faced are not evenly distributed across the species range. This paper highlights that effective conservation of spatially structured taxa requires targeted management of multiple genetic units. Given the importance of formal taxonomic description for conservation listings, further investigation of the potential for species delimitation within W. carteri is required.
英文关键词	biogeography climate change distribution intraspecific invertebrates lake refugia river Unionida
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000750134500001
WOS关键词	PHYLOGEOGRAPHIC STRUCTURE ; PHYLOGENETIC ANALYSIS ; POPULATION-GENETICS ; MOLLUSCA-BIVALVIA ; CLIMATE-CHANGE ; BIODIVERSITY ; EVOLUTION ; CONSERVATION ; EXTINCTION ; DECAPODA
WOS类目	Environmental Sciences ; Marine & Freshwater Biology ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377349
作者单位	[Benson, Justin; Stewart, Barbara; Close, Paul] Univ Western Australia, UWA Sch Agr & Environm, 35 Stirling Terrace, Albany, WA 6330, Australia; [Benson, Justin; Stewart, Barbara; Close, Paul] Univ Western Australia, Ctr Nat Resource Management, 35 Stirling Terrace, Albany, WA 6330, Australia; [Lymbery, Alan] Murdoch Univ, Ctr Sustainable Aquat Ecosyst, Harry Butler Inst, Perth, WA, Australia
推荐引用方式 GB/T 7714	Benson, Justin,Stewart, Barbara,Close, Paul,et al. Evidence for multiple refugia and hotspots of genetic diversity for Westralunio carteri, a threatened freshwater mussel in south-western Australia[J],2022.
APA	Benson, Justin,Stewart, Barbara,Close, Paul,&Lymbery, Alan.(2022).Evidence for multiple refugia and hotspots of genetic diversity for Westralunio carteri, a threatened freshwater mussel in south-western Australia.AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS.
MLA	Benson, Justin,et al."Evidence for multiple refugia and hotspots of genetic diversity for Westralunio carteri, a threatened freshwater mussel in south-western Australia".AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS (2022).