您好，欢迎访问安徽省农业科学院 机构知识库！

Historical population decline and habitat loss in a critically endangered species, the Chinese alligator (Alligator sinensis)

文献类型： 外文期刊

作者： Pan, Tao 1 ; Wang, Huan 1 ; Duan, Shulong 1 ; Ali, Izaz 1 ; Yan, Peng 1 ; Cai, Ruiqing 1 ; Wang, Mingsheng 1 ; Zhang, Jih 1 ;

作者机构： 1.Anhui Normal Univ, Coll Life Sci, Anhui Prov Key Lab Conservat & Exploitat Biol Res, Wuhu 241000, Anhui, Peoples R China

2.Anhui Univ, Sch Life Sci, Hefei 230601, Anhui, Peoples R China

3.Anhui Acad Agr Sci, Inst Fisheries Sci, Anhui Prov Key Lab Aquaculture & Stock Enhancemen, Hefei 230031, Anhui, Peoples R China

关键词： Alligator sinensis; Genetic diversity; Population demography; Niche reconstruction

期刊名称：GLOBAL ECOLOGY AND CONSERVATION （ 影响因子：3.38； 五年影响因子：4.167 ）

ISSN： 2351-9894

年卷期： 2019 年 20 卷

页码：

收录情况： SCI

摘要： Habitat loss and degradation are among the leading causes of local extinctions, so it is crucially important to preserve and restore the remaining critical habitat increasingly critical to conserve biodiversity. However, mechanisms driving species extinction often begin with habitat loss and seldom are well understood, which is greatly limits our ability to mitigate their impacts. The Chinese Alligator (Alligator sinensis) is a critically endangered crocodilian, which is narrowly distributed in very small six regions of Anhui province, China. In the present study, we used 9 nuclear microsatellite loci genotyped across the taxon's distribution area to investigate genetic variation and population demography in A. sinensis. The Chinese Alligator showed unusually low levels of genetic diversity (Na, 5.44; Ne, 1.97; He, 0.47) based on 793 individuals. Msvar analyses found recent signals of population decline reflecting a bottleneck (an approximately 9-fold decrease) about 25,000 years ago. Ecological niche modelling indicated that the habitat area has declined (about 8-15 fold) for A. sinensis when compared with that under different historical climatic conditions. Our results indicated that population decline and habitat loss in critically endangered Chinese Alligators may have acted as intrinsic and extrinsic factors that have impacted the current status of A. sinensis. In addition, these two unfavorable factors may have also directly contributed to a reduction in the genetic diversity of A. sinensis. (c) 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：安徽省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台