Late Quaternary climatic vegetational shifts in an ecological transition zone of northern Madagascar: insights from genetic analyses of two endemic rodent species
Late Quaternary climatic vegetational shifts in an ecological transition zone of northern Madagascar: insights from genetic analyses of two endemic rodent species
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马达加斯加北部生态过渡区晚第四纪气候植被变化：两种特有啮齿动物遗传分析的见解
DOI：
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发表时间：
2013
影响因子：
2.1
通讯作者：
Steven M. Goodman
中科院分区：
文献类型：
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作者：
Jean;Jean;M. Raheriarisena;Steven M. Goodman
Loky‐Manambato地区位于马达加斯加北方，是不同森林生物群落之间生物丰富的接触区。当地目前的森林覆盖是由潮湿和干燥的地层，这表明海拔分层。最近对一种区域性干旱森林啮齿动物Eliurus carletoni（Nesomyinae亚科）的地理学研究发现了18750年至7500年BP之间森林收缩的遗传证据，该证据基于花粉亚化石记录的外推，被认为与当地潮湿森林的扩张有关。在此，我们对这一假设进行了遗传测试，并重点关注两个邻近地块上依赖森林的啮齿动物物种的种群，其中一个与低海拔干旱森林（E. carletoni）和其他较高海拔的潮湿森林（Eliurus tanala）。使用线粒体标记和传统的和基于联合的地理学，历史人口统计学和群体遗传学方法的组合，我们发现了E. tanala。相邻种群E. carletoni和E. tanala表现出相反的历史人口模式，对于两者来说，证据表明，历史人口事件发生在过去25000年BP。这些发现有力地支持了Loky-Manambato地区植物区系组成的晚第四纪变化。
The Loky‐Manambato region, located in northern Madagascar, is a biotically rich contact zone between different forest biomes. Local current forest cover is composed of both humid and dry formations, which show elevational stratification. A recent phylogeographical study of a regional dry forest rodent, Eliurus carletoni (subfamily Nesomyinae), found genetic evidence of forest contractions between 18 750 and 7500 years BP, which based on extrapolation of the pollen subfossil record, was thought to be associated with an expansion of local humid forests. Herein, we conduct a genetic test of this hypothesis and focused on populations on two neighbouring massifs of forest‐dependent rodent species, one associated with low‐elevation dry forests (E. carletoni) and the other with higher elevation humid forests (Eliurus tanala). Using mitochondrial markers and a combination of traditional and coalescent‐based phylogeographical, historical demographic and population genetic methods, we found evidence of historical connections between populations of E. tanala. Adjacent populations of E. carletoni and E. tanala exhibit opposite historical demographic patterns, and for both, evidence suggests that historical demographic events occurred within the last 25 000 years BP. These findings strongly support the proposed late Quaternary shifts in the floristic composition of the Loky‐Manambato region.
影响因子：
10.7
作者：
Strasburg, Jared L.;Rieseberg, Loren H.
通讯作者：
Rieseberg, Loren H.
影响因子：
3.3
作者：
Yunxin Fu
通讯作者：
Yunxin Fu
影响因子：
3.3
作者：
L. Excoffier;P. Smouse;J. Quattro
通讯作者：
L. Excoffier;P. Smouse;J. Quattro