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遗传分析揭示了濒危的社会性食肉动物——亚洲野犬的种群衰退和分化。

Genetic analyses reveal demographic decline and population differentiation in an endangered social carnivore, Asiatic wild dog.

机构信息

Wildlife Institute of India, Chandrabani, Dehradun, 248001, India.

出版信息

Sci Rep. 2021 Aug 12;11(1):16371. doi: 10.1038/s41598-021-95918-3.

Abstract

Deforestation and agricultural intensification have resulted in an alarming change in the global land cover over the past 300 years, posing a threat to species conservation. Dhole is a monophyletic, social canid and, being an endangered and highly forest-dependent species, is more prone to the loss of favorable habitat in the Anthropocene. We determined the genetic differentiation and demographic history of dhole across the tiger reserves of Maharashtra using the microsatellite data of 305 individuals. Simulation-based analyses revealed a 77-85% decline in the major dhole sub-populations. Protected areas have provided refuge to the historically declining dhole population resulting in clustering with strong genetic structure in the remnant dhole population. The historical population decline coincides with the extreme events in the landscape over the past 300 years. The study highlights the pattern of genetic differentiation and diversity of a highly forest-dependent species which can be associated with the loss of forest cover outside tiger reserves. It also warrants attention to develop conservation plans for the remnant surviving population of dholes in India.

摘要

在过去的 300 年里,森林砍伐和农业集约化导致了全球土地覆盖的惊人变化,对物种保护构成了威胁。豺是一个单系的社会性犬科动物,作为一个濒危的高度依赖森林的物种,更容易在人类世失去有利的栖息地。我们使用 305 只个体的微卫星数据,确定了马哈拉施特拉邦老虎保护区内豺的遗传分化和种群历史。基于模拟的分析显示,主要豺亚种群的数量下降了 77-85%。保护区为历史上不断减少的豺种群提供了避难所,导致在剩余的豺种群中出现聚类和强烈的遗传结构。历史上的种群减少与过去 300 年里景观中的极端事件相一致。这项研究强调了高度依赖森林的物种的遗传分化和多样性模式,这可能与老虎保护区外森林覆盖的丧失有关。它还需要注意制定印度剩余豺幸存种群的保护计划。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/61bf/8361113/7f23d8cdb386/41598_2021_95918_Fig1_HTML.jpg

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