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2025 , Vol. 47 >Issue 05: 833 - 838

DOI: https://doi.org/10.1016/j.pld.2025.07.002

Diversification rates in large-scale moss assemblages along latitudinal and climatic gradients across the world

  • Hong Qian
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  • Research and Collections Center, Illinois State Museum, 1011 East Ash Street, Springfield, IL 62703, USA

收稿日期: 2025-05-25

  修回日期: 2025-07-10

  网络出版日期: 2025-09-29

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Diversification rates in large-scale moss assemblages along latitudinal and climatic gradients across the world

  • Hong Qian
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  • Research and Collections Center, Illinois State Museum, 1011 East Ash Street, Springfield, IL 62703, USA

Received date: 2025-05-25

  Revised date: 2025-07-10

  Online published: 2025-09-29

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摘要

Species richness in any area results from the interplay of the processes of speciation, extinction, and dispersal. The relationships between species richness and climate should be considered as an outcome of the effects of climate on speciation, extinction, and dispersal. Diversification rate represents the balance of speciation and extinction rates over time. Here, I explore diversification rates in mosses across geographic and climatic gradients worldwide. Specifically, I investigate latitudinal patterns and climatic associations of the mean diversification rate of mosses at global, hemispheric, and smaller scales. I find that the mean diversification rate of mosses is positively correlated with species richness of mosses, increases with decreasing latitude and increasing mean annual temperature and annual precipitation, and is more strongly associated with mean annual temperature than with annual precipitation. These findings shed light on variation of species richness in mosses across the world. The negative relationship between species richness and latitude and the positive relationship between species richness and mean diversification rate in mosses suggest that higher moss species richness at lower latitudes might have resulted, at least to some degree, from higher moss diversification rates at lower latitudes.

关键词： Bryophyte; Climatic gradient; Latitudinal diversity gradient; Speciation; Species richness; Tip diversification

本文引用格式

Hong Qian . Diversification rates in large-scale moss assemblages along latitudinal and climatic gradients across the world[J]. Plant Diversity, 2025 , 47(05) : 833 -838 . DOI: 10.1016/j.pld.2025.07.002

Abstract

Species richness in any area results from the interplay of the processes of speciation, extinction, and dispersal. The relationships between species richness and climate should be considered as an outcome of the effects of climate on speciation, extinction, and dispersal. Diversification rate represents the balance of speciation and extinction rates over time. Here, I explore diversification rates in mosses across geographic and climatic gradients worldwide. Specifically, I investigate latitudinal patterns and climatic associations of the mean diversification rate of mosses at global, hemispheric, and smaller scales. I find that the mean diversification rate of mosses is positively correlated with species richness of mosses, increases with decreasing latitude and increasing mean annual temperature and annual precipitation, and is more strongly associated with mean annual temperature than with annual precipitation. These findings shed light on variation of species richness in mosses across the world. The negative relationship between species richness and latitude and the positive relationship between species richness and mean diversification rate in mosses suggest that higher moss species richness at lower latitudes might have resulted, at least to some degree, from higher moss diversification rates at lower latitudes.

Key words： Bryophyte; Climatic gradient; Latitudinal diversity gradient; Speciation; Species richness; Tip diversification

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