Quaternary climatic fluctuations influence the demographic history of two species of sky-island endemic amphibians in the Neotropics
Quaternary climatic fluctuations influence the demographic history of two species of sky-island endemic amphibians in the Neotropics
复制标题
DOI：
10.1016/j.ympev.2021.107113
复制
发表时间：
2021-03-19
影响因子：
4.1
通讯作者：
Burbrink, Frank T.
中科院分区：
文献类型：
--
作者：
de Oliveira, Francisco Fonseca Ribeiro;Gehara, Marcelo;Burbrink, Frank T.
我们评估的作用，第四纪气候波动的人口历史和人口结构的两栖动物物种特有的？campo rupestre？在新热带，评估其分布的变化，人口变化，和谱系形成从更新世结束到现在。我们选择了两种高海拔地区特有的无尾两栖动物？campo rupestre？在埃斯皮尼亚o巴西东北部和东南部的山脉（ER）（Bokermannohyla alvarengai和Bokermannohyla oxente），作为模型来测试第四纪气候波动在该地区分布范围内的作用。我们收集了整个分布范围内的组织样本，并使用统计地理学方法来研究分歧和人口统计学的过程。我们创造了空间？时间重建使用贝叶斯推理结合后投预测的物种分布模型（SDM）的合并框架。我们还使用了结果和文献信息，通过近似贝叶斯计算（ABC）来测试替代多元化方案。我们的研究结果表明，第四纪气候波动的影响，这两个物种的地理范围显示人口扩张在末次冰期最大（LGM）和范围收缩在间冰期，推断从选定的ABC模型和过去的预测SDMs。我们恢复了更新世的多样化，这两个物种发生在明显独特的时期，为每个tax.A旧的和范围限制的血统，恢复在地理上孤立的地质构造，值得保护和进一步的分类研究。新热带区特有的两栖动物物种的多样性和分布？campo rupestre？受到第四纪气候波动的影响。适应寒冷的物种的扩张局限于更高的海拔地区在冰期和间冰期的相应收缩可能是至关重要的物种丰富度和特有性的模式，沿着海拔梯度在热带和亚热带地区。这些过程可能影响分布在具有不同地形的异质景观中的生物群的演变。
We evaluated the role of Quaternary climatic fluctuations on the demographic history and population structure of amphibian species endemic to the ?campo rupestre? in the Neotropics, evaluating their distributional shifts, demographic changes, and lineage formation from the end of Pleistocene to present. We chose two anurans endemic to the high-elevation ?campo rupestre? in the Espinha?o Range (ER) in northeastern and southeastern Brazil (Bokermannohyla alvarengai and Bokermannohyla oxente), as models to test the role of Quaternary climatic fluctuations over their distribution range in this region. We collected tissue samples throughout their distribution range and used statistical phylogeography to examine processes of divergence and population demography. We generated spatial?temporal reconstructions using Bayesian inference in a coalescent framework in combination with hind-cast projections of species distribution models (SDMs). We also used the results and literature information to test alternative diversification scenarios via approximate Bayesian computation (ABC). Our results show that Quaternary climatic fluctuations influenced the geographic ranges of both species showing population expansion during the last glacial maximum (LGM) and range contraction during interglacial periods, as inferred from selected ABC models and from past projections of SDMs. We recovered Pleistocene diversification for both species occuring in distinctly unique periods for each taxon. An older and range-restricted lineage was recovered in a geographically isolated geological massif, deserving conservation and further taxonomic study. The diversification and distribution of these amphibian species endemic to the Neotropical ?campo rupestre? were influenced by Quaternary climatic fluctuations. The expansion of cold adapted species restricted to higher elevations during glacial periods and their concomitant retraction during interglacial periods may have been crucial for producing patterns of species richness and endemism along elevation gradients in tropical and subtropical domains. Such processes may influence the evolution of the biota distributed in heterogeneous landscapes with varied topography.