Contrasting demographic histories of the neighboring bonobo and chimpanzee
Contrasting demographic histories of the neighboring bonobo and chimpanzee
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DOI：
10.1007/s10329-013-0373-3
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发表时间：
2014-01-01
期刊：
影响因子：
1.7
通讯作者：
Siegismund, Hans R.
中科院分区：
文献类型：
--
作者：
Hvilsom, Christina;Carlsen, Frands;Siegismund, Hans R.
更新世是一个剧烈的气候变化时期，对许多动物物种的种群规模产生了深远的影响。这些物种是如何被过去的事件塑造的往往是不清楚的，阻碍了我们对导致当今人口的人口动态的理解。我们分析了代表所有四个公认的黑猩猩亚种和倭黑猩猩的完整线粒体基因组，以推断最近的人口统计学历史，并使用模拟来排除人口结构的混杂效应。我们的全属贝叶斯聚结为基础的分析揭示了令人惊讶的不同的黑猩猩亚种和倭黑猩猩的人口历史，尽管他们重叠的栖息地要求。据推测，从大约5万到8万年前到今天，中部和东部的黑猩猩亚种的数量增加了10倍，而邻近的倭黑猩猩的数量却保持不变。种群规模的变化可能与晚更新世气候振荡导致的栖息地面积变化有关。此外，适应雨林的黑猩猩的人口扩张时间与适应热带草原的人类的扩张时间是一致的，这可能表明大约5万至8万年前气候条件变化的共同反应。
The Pleistocene epoch was a period of dramatic climate change that had profound impacts on the population sizes of many animal species. How these species were shaped by past events is often unclear, hindering our understanding of the population dynamics resulting in present day populations. We analyzed complete mitochondrial genomes representing all four recognized chimpanzee subspecies and the bonobo to infer the recent demographic history and used simulations to exclude a confounding effect of population structure. Our genus-wide Bayesian coalescent-based analysis revealed surprisingly dissimilar demographic histories of the chimpanzee subspecies and the bonobo, despite their overlapping habitat requirements. Whereas the central and eastern chimpanzee subspecies were inferred to have expanded tenfold between around 50,000 and 80,000 years ago and today, the population size of the neighboring bonobo remained constant. The changes in population size are likely linked to changes in habitat area due to climate oscillations during the late Pleistocene. Furthermore, the timing of population expansion for the rainforest-adapted chimpanzee is concurrent with the expansion of the savanna-adapted human, which could suggest a common response to changed climate conditions around 50,000-80,000 years ago.