Population genetics of the East African White-eye species complex
Population genetics of the East African White-eye species complex
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DOI：
10.1007/s10592-013-0492-9
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发表时间：
2013-10-01
影响因子：
2.2
通讯作者：
Lens, Luc
中科院分区：
文献类型：
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作者：
Habel, Jan Christian;Cox, Siobhan;Lens, Luc
东非山地生物多样性热点由嵌入东非干燥的低地稀树草原中的孤立的山地森林组成，其山峰和山脊被云雾森林残余物覆盖。这些云雾森林是山地绣眼鸟（Zosterops poliogaster）的家园，而三个同类物种（阿比西尼亚绣眼鸟，Zosterops abyssinicus;黄色绣眼鸟，Zosterops senegalensis;奔巴绣眼鸟，Zosterops vaughani）居住在邻近的低地稀树草原。我们在肯尼亚采集了所有四个物种的个体，以分析种间遗传关系以及Z山区种群的种内分化。脊髓灰质炎4种植物间的遗传分化程度较低，但Z.即使在地理上相邻的人群之间，poliogaster也非常高。总体而言，所有四个物种的遗传变异水平差异很大，在三个低地物种中检测到更高的多样性。高原物种的特点是许多私人等位基因，在地理上限制在人口从单一的山区，其中一些显示出最近的人口瓶颈的证据。我们的结论是Z.由于高比例的地方性等位基因以及小而孤立的种群所特有的高遗传漂变和低基因流动的遗传特征，poliogaster种群具有很高的保护价值和保护关注。
The Eastern Afromontane biodiversity hotspot consists of isolated mountain massifs embedded within the dry lowland savannas of East Africa and of which the peaks and ridges are covered by cloud forest remnants. These cloud forests are home to the Mountain White-eye (Zosterops poliogaster), while three congeneric species (Abyssinian White-eye, Zosterops abyssinicus; Yellow White-eye, Zosterops senegalensis; Pemba White-eye, Zosterops vaughani) inhabit the adjacent lowland savannas. We sampled individuals of all four species across Kenya to analyse interspecific genetic relationships as well as intraspecific differentiation among mountain populations of Z. poliogaster. While the level of genetic differentiation among the four species was rather low, genetic differentiation within Z. poliogaster was very high, even between geographically neighbouring populations. Overall, levels of genetic variation varied strongly across all four species, with much higher diversity detected within the three lowland ones. The highland species was characterised by numerous private alleles that were geographically restricted at populations from single mountains, some of which showed evidence of recent population bottlenecks. We conclude that Z. poliogaster populations are both of high conservation value and conservation concern, given the high proportion of endemic alleles and the genetic signatures of high genetic drift and low gene flow that are typical for small and isolated populations.