Geographic Pattern of Bryophyte Species Richness in China: The Influence of Environment and Evolutionary History

作者：Xiaotong Song, Wenzhuo Fang, Xiulian Chi, Xiaoming Shao, Qinggang Wang · 发表于：Frontiers in Ecology and Evolution · 年份：2021 · DOI：10.3389/fevo.2021.680318 · 被引用次数：15 · 研究领域：Bryophyte Studies and Records、Botany and Plant Ecology Studies、Peatlands and Wetlands Ecology

How contemporary environment interacts with macroevolutionary processes to generate the geographic pattern of bryophyte species is still unresolved. China is very rich in bryophytes, with more than 3,000 bryophytes covering 70% of the families in the world. In this study, we assessed the effects of the contemporary environment (average temperature of the coldest season TCQ, precipitation of the warmest season PWQ, and elevational range) and the recent diversification rates (estimated as mean species number per genus, MSG) on the geographical pattern of species richness for bryophytes and two groups (i.e., liverworts and mosses) in China. We compiled the provincial level distribution of bryophyte species and estimated the geographic pattern of the recent diversification rate by MSG for species in China. Univariate, multivariate regressions and path model analyses were used to assess the relationships between species richness, MSG, and their potential environmental drivers. Species richness of all bryophytes and liverworts significantly increased with the increase of MSG, either in regressions or path analyses, indicating that provinces with high bryophyte richness were mainly inhabited by species (especially liverworts) from lineages with particularly high MSG. In contrast, the species richness of mosses was insignificantly decreased with MSG in univariate regression or insignificantly increased with MSG in path analysis. Both species richness and MSG of all bryophytes and liv...