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Phylogeographic patterns and conservation implications of the endangered Chinese giant salamander

文献类型： 外文期刊

作者： Liang, Zhi-Qiang 1 ; Chen, Wei-Tao 5 ; Wang, Deng-Qiang 1 ; Zhang, Shu-Huan 1 ; Wang, Chong-Rui 2 ; He, Shun-Ping 5 ;

作者机构： 1.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Minist Agr China, Key Lab Freshwater Biodivers Conservat, Wuhan, Hubei, Peoples R China

2.Hunan Fisheries Sci Inst, Changsha, Hunan, Peoples R China

3.Collaborat Innovat Ctr Efficient & Hlth Prod Fish, Changde, Peoples R China

4.Southwest Univ, Coll Life Sci, Chongqing, Peoples R China

5.Chinese Acad Sci, Inst Hydrobiol, Key Lab Aquat Biodivers & Conservat, Wuhan, Hubei, Peoples R China

6.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Guangzhou, Guangdong, Peoples R China

7.Adm Off Natl Giant Salamander Nat Reserve Zhangji, Zhangjiajie, Hunan, Peoples R China

8.Univ Helsinki, Fac Biol & Environm Sci, Res Programme Organismal & Evolutionary Biol, Ecol Genet Res Unit,Dept Biosci, Helsinki, Finland

关键词： Andrias davidianus; conservation; genetic diversity; geographic partition; phylogeography

期刊名称：ECOLOGY AND EVOLUTION （ 影响因子：2.912； 五年影响因子：3.271 ）

ISSN： 2045-7758

年卷期： 2019 年 9 卷 7 期

页码：

收录情况： SCI

摘要： Understanding genetic diversity patterns of endangered species is an important premise for biodiversity conservation. The critically endangered salamander Andrias davidianus, endemic to central and southern mainland in China, has suffered from sharp range and population size declines over the past three decades. However, the levels and patterns of genetic diversity of A. davidianus populations in wild remain poorly understood. Herein, we explore the levels and phylogeographic patterns of genetic diversity of wild-caught A. davidianus using larvae and adult collection with the aid of sequence variation in (a) the mitochondrial DNA (mtDNA) fragments (n = 320 individuals; 33 localities), (b) 19 whole mtDNA genomes, and (c) nuclear recombinase activating gene 2 (RAG2; n = 88 individuals; 19 localities). Phylogenetic analyses based on mtDNA datasets uncovered seven divergent mitochondrial clades (A-G), which likely originated in association with the uplifting of mountains during the Late Miocene, specific habitat requirements, barriers including mountains and drainages and lower dispersal ability. The distributions of clades were geographic partitioned and confined in neighboring regions. Furthermore, we discovered some mountains, rivers, and provinces harbored more than one clades. RAG2 analyses revealed no obvious geographic patterns among the five alleles detected. Our study depicts a relatively intact distribution map of A. davidianus clades in natural species range and provides important knowledge that can be used to improve monitoring programs and develop a conservation strategy for this critically endangered organism.

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