Phylogeny of Weinmannia (Cunoniaceae) reveals the contribution of the southern extratropics to tropical Andean biodiversity

IF 3.6 1区 生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY
Ricardo A. Segovia , Eduardo Aguirre-Mazzi , Christine E. Edwards , Alexander G. Linan , Alfredo Fuentes , Andrea Chaspuengal , Kyle G. Dexter , Francisco Fajardo-Gutiérrez , William Farfan-Rios , Nora H. Oleas , Juan C. Penagos Zuluaga , J. Sebastián Tello
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Abstract

The Andes are a relatively young mountain range with impressive biodiversity, but the biogeographic processes underlying its hyperdiversity are still being unraveled. Novel mid- to high-elevation climates may have served as a biological corridor for the immigration of temperate-adapted lineages to more equatorial latitudes, contributing unknown levels of diversity to this region. We tested the hypothesis that Weinmannia is a lineage of extratropical origin that recently reached and then diversified extensively in the tropical Andes. Using a 2bRAD seq approach to generate a time-calibrated phylogeny for the genus, we found that extratropical species were placed as sister to the rest of Weinmannia and that younger clades were distributed towards more equatorial latitudes. Although Weinmannia exhibited low niche conservatism in elevation and latitude, trait reconstructions of climatic variables showed that the common ancestor of Weinmannia occupied cool climates, with high conservatism of thermal and water availability niche across the phylogeny. Thus, Andean uplift likely created habitats with suitable environmental conditions, providing a dispersal route for extant Weinmannia to colonize the tropical Andes from the southern extratropics. These southern lineages likely converged with those originating in other tropical and extratropical centers of diversification, providing multiple origins for the hyperdiversity in the modern montane forests of the tropical Andes.

Abstract Image

木桐科植物的系统发育揭示了南温带地区对热带安第斯地区生物多样性的贡献
安第斯山脉是一个相对年轻的山脉,拥有令人印象深刻的生物多样性,但其高度多样性背后的生物地理过程仍在解开。新的中高海拔气候可能是适应温度的谱系向赤道纬度迁移的生物走廊,为该地区贡献了未知水平的多样性。我们检验了Weinmannia是温带起源谱系的假设,该谱系最近到达热带安第斯山脉,然后广泛多样化。使用2bRAD seq方法生成该属的时间校准系统发育,我们发现温带物种被放置为Weinmannia其他物种的姐妹,而年轻的分支分布在更接近赤道纬度的地方。尽管温曼属在海拔和纬度上表现出较低的生态位保守性,但气候变量的特征重建表明温曼属的共同祖先居住在凉爽的气候中,在整个系统发育过程中,温曼属的热可用性和水可用性生态位具有较高的保守性。因此,安第斯山脉的隆起很可能创造了适宜环境条件的栖息地,为现存的温曼原虫从南温带向热带安第斯山脉的殖民提供了一条传播途径。这些南方谱系可能与起源于其他热带和温带多样化中心的谱系汇合,为热带安第斯山脉现代山地森林的高度多样性提供了多个起源。
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来源期刊
Molecular Phylogenetics and Evolution
Molecular Phylogenetics and Evolution 生物-进化生物学
CiteScore
7.50
自引率
7.30%
发文量
249
审稿时长
7.5 months
期刊介绍: Molecular Phylogenetics and Evolution is dedicated to bringing Darwin''s dream within grasp - to "have fairly true genealogical trees of each great kingdom of Nature." The journal provides a forum for molecular studies that advance our understanding of phylogeny and evolution, further the development of phylogenetically more accurate taxonomic classifications, and ultimately bring a unified classification for all the ramifying lines of life. Phylogeographic studies will be considered for publication if they offer EXCEPTIONAL theoretical or empirical advances.
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