Phylogenetic structure of liverwort assemblages along an elevational gradient in the tropical Andes: geographic patterns and climatic drivers

doi:10.1111/ecog.07434

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	Phylogenetic structure of liverwort assemblages along an elevational gradient in the tropical Andes: geographic patterns and climatic drivers
	Qian, Hong; Kessler, Michael
	2024
发表期刊	ECOGRAPHY
ISSN	0906-7590
卷号	2024 期号:12
摘要	Liverworts are an ancient plant lineage that occurs worldwide with the highest species richness in cool and humid habitats such as tropical montane and temperate rain forests. It has been proposed that liverworts originated under such temperate climatic conditions and have later expanded into more tropical conditions, but how this is reflected in their phylogenetic diversity along the strong climatic gradients associated with elevation remains unexplored. We studied the phylogenetic diversity of regional liverwort floras along the elevational gradient in the tropical Andes, comparing indices that emphasize deeper and shallower phylogenetic relationships, and relating these to temperature- and precipitation-related variables, as well as to climatic extremes and seasonality. We found that whereas liverwort species richness peaks at around 2000 m a.s.l., richness-corrected phylogenetic diversity increases with elevation, and the standardized effect of size of phylogenetic diversity is highest at 2500-4000 m a.s.l. This is in accordance with an origin of liverworts under cool conditions, followed by more recent diversification in warmer climates at lower elevations. We further found temperature-related climatic parameters to be stronger predictors of phylogenetic diversity of liverworts than precipitation-related variables, and climatic extremes to have a stronger influence than climatic seasonality. We interpret these patterns as reflecting the physiological challenges of adapting to low temperatures as well as rare occurrences of extreme climatic events. All this reveals a strong signal of the evolutionary dynamics of this ancient plant lineage linked with its physiological adaptations to climatic conditions. The age of this group and its poikilohydric nature, i.e. its inability to regulate water loss, lead to patterns that contrast with those of vascular plants, allowing for discerning evolutionary generalities that are independent of physiology and lineage age.
DOI	10.1111/ecog.07434
WOS记录号	WOS:001303075800001
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75929
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Qian, Hong,Kessler, Michael. Phylogenetic structure of liverwort assemblages along an elevational gradient in the tropical Andes: geographic patterns and climatic drivers[J]. ECOGRAPHY,2024,2024(12).
APA	Qian, Hong,&Kessler, Michael.(2024).Phylogenetic structure of liverwort assemblages along an elevational gradient in the tropical Andes: geographic patterns and climatic drivers.ECOGRAPHY,2024(12).
MLA	Qian, Hong,et al."Phylogenetic structure of liverwort assemblages along an elevational gradient in the tropical Andes: geographic patterns and climatic drivers".ECOGRAPHY 2024.12(2024).

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10.1111_ecog.07434.p（672KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载