Integrating phylogeography and species distribution models: cryptic distributional responses to past climate change in an endemic rodent from the central Chile hotspot.
Integrating phylogeography and species distribution models: cryptic distributional responses to past climate change in an endemic rodent from the central Chile hotspot.
复制标题
整合系统发育地理学和物种分布模型：智利中部热点地区的特有啮齿动物对过去气候变化的神秘分布响应。
DOI：
10.1111/ddi.12433
复制
发表时间：
2016
影响因子：
4.6
通讯作者：
Palma,REduardo
中科院分区：
文献类型：
--
作者：
Gutiérrez-Tapia,Pablo;Palma,REduardo
目的在未来全球气候变化情景下，物种水平下的生物多样性损失可能被严重低估。因此，在这一水平上描述多样性单元的特征以及了解它们对气候强迫的生态响应是很重要的。我们选择了一种来自高度濒危生态地理区域的特有啮齿动物作为模型来寻找物种水平以下的分布响应：达尔文Phyllotis darwin。地理位置智利中部生物多样性热点：该地区拥有大量的特有物种，并且在末次盛冰期期间和之后经历了两个山地系统之间的植被移位。方法对其内部的隐谱系进行了表征。达尔文是一个经典的系统地理学方法；将这些种内谱系作为末次盛冰期和当前边界气候条件的相关单元来构建分布模型。各谱系边界条件之间的分布差异被解释为对冰川后气候变化的分布响应。结果本种由两大类群组成，其中一个类群不仅在山谷中广泛分布，而且在山脉中也广泛分布，而另一个类群则在两个山脉中都不相交分布，而且总是在1500 m以上。LGM气候条件下的谱系分布模式表明，两个谱系在南缘共分布。达尔文目前的地理范围，主要在山谷和海岸。主要结论：家谱分布现状。达尔文认为LGM后对气候变化的隐式分布响应的结果是：冰川期后的北定殖，两个种群在高度上有严格的分离。
AimBiodiversity losses under the species level may have been severely underestimated in future global climate change scenarios. Therefore, it is important to characterize the diversity units at this level, as well as to understand their ecological responses to climatic forcings. We have chosen an endemic rodent from a highly endangered ecogeographic area as a model to look for distributional responses below the species level:Phyllotis darwini.LocationThe central Chile biodiversity hotspot: This area harbours a high number of endemic species, and it is known to have experienced vegetational displacements between two mountain systems during and after the Last Glacial Maximum.MethodsWe have characterized cryptic lineages insideP. darwiniin a classic phylogeographic approach; those intraspecific lineages were considered as relevant units to construct distribution models at Last Glacial Maximum and at present, as border climatic conditions. Differences in distribution between border conditions for each lineage were interpreted as distributional responses to post‐glacial climate change.ResultsThe species is composed of two major phylogroups: one of them has a broad distribution not only across the valley but also in mountain ranges, whereas the other displays a disjunct distribution across both mountain ranges and always above 1500 m. The lineage distribution model under LGM climatic conditions suggests that both lineages were codistributed in the southern portion ofP. darwini'scurrent geographic range, mainly at the valley and at the coast.Main conclusionsPresent distribution of lineages inP. darwiniis the consequence of a cryptic distributional response to climate change after LGM: post‐glacial northward colonization, with strict altitudinal segregation of both phylogroups.