Climatic niche evolution in Smilacaceae (Liliales) drives patterns of species diversification and richness between the Old and New World

作者：Zhe‐Chen Qi, Pan Li, Jun‐Jie Wu, Alexander Gamisch, Tuo Yang, Yunpeng Zhao, Wu‐Qing Xu, Shichao Chen, Kenneth M. Cameron, Yingxiong Qiu, Chengxin Fu · 发表于：Journal of Systematics and Evolution · 年份：2023 · DOI：10.1111/jse.12998 · 被引用次数：15 · 研究领域：Plant and Fungal Species Descriptions、Plant Diversity and Evolution、Mediterranean and Iberian flora and fauna

Abstract Geographical variation in species richness in plant groups is determined by the interplay between historical, evolutionary, and ecological processes. However, the processes underlying the striking disparity in species richness between Asia and the Americas remain poorly understood. Here, we synthesize global phylogenetic and macroecological data on the diversification of Smilacaceae, deciphering potential drivers underlying the species diversity pattern biased toward Asia. We compiled global distributions of all Smilacaceae species, and reconstructed the biogeographic history and niche evolution using a new time‐calibrated phylogeny (eight genes, 135 species). Integrating these data sets, we estimated evolutionary histories and diversification rates for each region, and tested correlations among species diversification, niche evolution, and niche divergence. Smilacaceae probably originated during the Late Cretaceous/Early Palaeocene and began to diversify in middle to low latitudes in Central America and Eurasia during the Late Eocene. Both the Old and New World clades exhibited a steady, albeit slight, increase of species diversification from the Late Eocene to Early Miocene. However, the Old World clade experienced an abrupt increase in net diversification during the Late Miocene. Our findings also revealed that species diversification rates were positively correlated with ecological niche evolution and niche divergence. Niche shifts and climatic niche evolution si...