Genetic structure of island populations of the endangered bat Hipposideros turpis turpis: implications for conservation
Genetic structure of island populations of the endangered bat Hipposideros turpis turpis: implications for conservation
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DOI：
10.1007/s10144-008-0111-7
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发表时间：
2008
影响因子：
1.7
通讯作者：
L. M. Echenique-Díaz;J. Yokoyama;O. Takahashi;M. Kawata
中科院分区：
文献类型：
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作者：
L. M. Echenique-Díaz;J. Yokoyama;O. Takahashi;M. Kawata
由于缺乏对其生物学和自然历史的了解以及人类活动日益增加的影响，保护日本南部濒临灭绝的蝙蝠物种的努力受到了阻碍。为了解决该物种面临的一些保护挑战，我们使用6个物种特异性微卫星标记研究了岛屿内和岛屿间种群的遗传结构和分布。我们特别设法建立岛屿人口之间的关系，并确定有效的养护管理单位。FST分析、分子变异分析和贝叶斯聚类分析表明，岛屿间存在显著的遗传分化，但岛屿内部分化不大。与那国岛的小种群似乎不仅在地理上是孤立的，而且在遗传上也是孤立的。考虑到这个种群的规模和低遗传变异，它面临着最大的灭绝风险。伊里奥莫特岛和石垣岛的大种群在遗传上相互关联的程度更大，并且比Yonaguni岛的种群表现出更高的遗传变异。这表明这两个岛屿种群应该被纳入一个单一的管理单元，而Yonaguni岛的蝙蝠应该独立管理，并给予更高的保护优先权。诸如在蚁群之间划定植被走廊，以及在已知最大蚁群的入口处建造大门等行动，都应该列入对这种仍然知之甚少的物种的保护议程。
Efforts for the conservation of the endangered bat speciesHipposideros turpis turpisin southern Japan are hampered by a lack of information about its biology and natural history and by the increasing effect of human activities. In an attempt to address some of the conservation challenges faced by this species, we studied the genetic structure and dispersal of intra- and interisland populations using six species-specific microsatellite markers. In particular, we sought to establish the relationship between island populations and to define effective management units for conservation. Pairwise co-ancestry index (FST) analysis, analysis of molecular variance, and Bayesian clustering suggested the presence of significant genetic differentiation between islands but little differentiation within them. The small Yonaguni Island population appeared to be not only geographically isolated, but also genetically isolated. This population is at the greatest risk of extinction, considering its size and low genetic variation. The larger populations on Iriomote and Ishigaki Islands are genetically related to each other to a greater degree and exhibit higher genetic variation than the Yonaguni Island population. This suggests that these two island populations should be included in a single management unit, while bats from Yonaguni Island should be managed independently and given higher priority for conservation. Actions such as defining vegetation corridors between colonies, as well as building gates at the entrance of the largest known colony, should be included in the conservation agenda of this still poorly known species.