Department of Biology, University of the Balearic Islands, Ctra. Valldemossa km 7'5, 07122, Palma de Mallorca, Balearic Islands, Spain.
IMEDEA (CSIC-UIB), Mediterranean Institute for Advanced Studies, C/ Miquel Marquès 21, 07190, Esporles, Balearic Islands, Spain.
Sci Rep. 2021 Jan 11;11(1):366. doi: 10.1038/s41598-020-79620-4.
Species diversification in ancient lakes has enabled essential insights into evolutionary theory as they embody an evolutionary microcosm compared to continental terrestrial habitats. We have studied the high-altitude amphipods of the Andes Altiplano using mitogenomic, nuclear ribosomal and single-copy nuclear gene sequences obtained from 36 Hyalella genomic libraries, focusing on species of the Lake Titicaca and other water bodies of the Altiplano northern plateau. Results show that early Miocene South American lineages have recently (late Pliocene or early Pleistocene) diversified in the Andes with a striking morphological convergence among lineages. This pattern is consistent with the ecological opportunities (access to unoccupied resources, initial relaxed selection on ecologically-significant traits and low competition) offered by the lacustrine habitats established after the Andean uplift.
与大陆陆地生境相比，古代湖泊中的物种多样化使人们能够深入了解进化理论，因为它们是进化的缩影。我们使用从 36 个 Hyalella 基因组文库中获得的线粒体基因组、核核糖体和单拷贝核基因序列研究了安第斯高原的高海拔端足类动物，重点是的的喀喀湖和高原北部高原其他水体的物种。结果表明，早中新世的南美谱系最近（上新世晚期或更新世早期）在安第斯山脉中多样化，谱系之间存在显著的形态趋同。这种模式与安第斯隆起后形成的湖泊生境所提供的生态机会（获得未占据的资源、对生态重要特征的初始放松选择以及低竞争）一致。
