Eldridge Ryan A, Achmadi Anang S, Giarla Thomas C, Rowe Kevin C, Esselstyn Jacob A
Museum of Natural Science, Louisiana State University, 119 Foster Hall, Baton Rouge, LA 70803, USA; Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA.
Museum Zoologicum Bogoriense, Research Center for Biology, Cibinong, Bogor 16911, Indonesia.
Mol Phylogenet Evol. 2018 Jan;118:306-317. doi: 10.1016/j.ympev.2017.09.018. Epub 2017 Sep 27.
Phylogeographic research on endemic primates and amphibians inhabiting the Indonesian island of Sulawesi revealed the existence of seven areas of endemism (AoEs). Here, we use phylogenetic and population genetic analyses of one mitochondrial gene and 15 nuclear loci to assess geographic patterns of genetic partitioning in a shrew (Crocidura elongata) that is endemic to Sulawesi, but occurs across the island. We uncover substantial genetic diversity in this species both between and within AoEs, but we also identify close relationships between populations residing in different AoEs. One of the earliest divergences within C. elongata distinguishes a high-elevation clade from low-elevation clades. In addition, on one mountain, we observe three distinct genetic groups from low, middle, and high elevations, suggesting divergence along a single elevational gradient. In general, our results show that C. elongata, like several other Sulawesi endemic taxa, harbors extensive genetic diversity. This diversity is structured in part by known AoE boundaries, but also by elevational gradients and geographic isolation within AoEs.
对栖息在印度尼西亚苏拉威西岛的特有灵长类动物和两栖动物的系统地理学研究揭示了七个特有区域（AoE）的存在。在此，我们对一个线粒体基因和15个核基因座进行系统发育和群体遗传分析，以评估一种仅在苏拉威西岛有分布且全岛都有出现的鼩鼱（长吻麝鼩）的遗传分化地理模式。我们发现该物种在特有区域之间和内部都存在大量遗传多样性，但也确定了不同特有区域内种群之间的密切关系。长吻麝鼩最早的分化之一是将一个高海拔分支与低海拔分支区分开来。此外，在一座山上，我们观察到来自低、中、高海拔的三个不同遗传群体，这表明沿着单一海拔梯度发生了分化。总体而言，我们的结果表明，长吻麝鼩与其他几种苏拉威西岛特有类群一样，拥有广泛的遗传多样性。这种多样性部分由已知的特有区域边界构成，但也受海拔梯度和特有区域内的地理隔离影响。
