Comparative phylogeography of the avifauna in the northern Atlantic Forest

The Pernambuco Center of Endemism (PCE) is the northernmost strip of the Atlantic Forest (AF). The biogeographic affinities among avifaunas in the PCE, the southern-central Atlantic Forest (SCAF), and Amazonia (AM) have not been studied comprehensively, and current patterns of genetic diversity in the PCE remain unclear. The interplay between species ecological attributes and historical processes, such as Pleistocene climate fluctuations or the appearance of rivers, may have affected population genetic structures in the PCE. Moreover, the role of past connections between the PCE and AM and the elevational distribution of species in assembling the PCE avifauna remain untested. Here, we investigated the biogeographic history of seven taxa endemic to the PCE within a comparative phylogeographic framework based on 3,618 independent single nucleotide polymorphisms (SNPs) extracted from flanking regions of ultraconserved elements (UCEs) and one mitochondrial gene.

伯南布哥特有种中心（Pernambuco Center of Endemism, PCE）为大西洋森林（Atlantic Forest, AF）最北端的狭长片区。当前学界尚未全面解析PCE、中南部大西洋森林（southern-central Atlantic Forest, SCAF）与亚马孙（Amazonia, AM）三地鸟类区系间的生物地理亲缘关系，且PCE现存的遗传多样性格局仍不明朗。物种生态特征与更新世气候波动、河流形成等历史过程之间的相互作用，或对PCE内的种群遗传结构产生了影响。此外，PCE与亚马孙过往的种群联系，以及物种海拔分布在PCE鸟类区系组建过程中所发挥的作用，均未得到实证检验。本研究基于从超保守元件（ultraconserved elements, UCEs）侧翼区域提取的3618个独立单核苷酸多态性（single nucleotide polymorphisms, SNPs）以及1个线粒体基因，在比较系统生物地理学框架内，对7种PCE特有类群的生物地理历史展开了探究。