首页|A phylogenetic approach identifies patterns of beta diversity and floristic subregions of the Qinghai-Tibet Plateau

A phylogenetic approach identifies patterns of beta diversity and floristic subregions of the Qinghai-Tibet Plateau

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Patterns of taxonomic and phylogenetic beta diversity and their relationships with environmental cor-relates can help reveal the origin and evolutionary history of regional biota.The Qinghai-Tibet Plateau(QTP)harbors an exceptionally diverse flora,however,a phylogenetic perspective has rarely been used to investigate its beta diversity and floristic regions.In this study,we used a phylogenetic approach to identify patterns of beta diversity and quantitatively delimit floristic regions on the Qinghai-Tibet Plateau.We also examined the relationships between multifaceted beta diversity,geographical dis-tance,and climatic difference,and evaluated the relative importance of various factors(i.e.,climate,topography and history)in shaping patterns of beta diversity.Sørensen dissimilarity indices indicated that patterns of species turnover among sites dominated the QTP.We also found that patterns of both taxonomic and phylogenetic beta diversity were significantly related to geographical distance and cli-matic difference.The environmental factors that contributed most to these patterns of beta diversity include annual precipitation,mean annual temperature,climatic gradients and climatic instability.Hi-erarchical dendrograms of dissimilarity and non-metric multidimensional scaling ordination based on phylogenetic beta diversity data identified ten floristic subregions in the QTP.Our results suggest that the contemporary environment and historical climate changes have filtered species composition among sites and eventually determined beta diversity patterns of plants in the QTP.

Biogeographical regionalizationPhylogenetic beta diversitySeed plantsSørensen dissimilarityQinghai-Tibet Plateau

Haibin Yu、Man Yang、Zixin Lu、Weitao Wang、Fangyuan Yu、Yonghua Zhang、Xue Yin、Hongjun Yu、Junjie Hu、David C.Deane

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Key Laboratory of Conservation and Application in Biodiversity of South China,School of Life Sciences,Guangzhou University,Guangzhou 510006,China

School of Ecology,Sun Yat-Sen University,Shenzhen 510275,China

School of Geography and Remote Sensing,Guangzhou University,Guangzhou 510006,China

College of Life and Environmental Science,Wenzhou University,Wenzhou 325035,China

Centre for Future Landscapes and Department of Environment and Genetics,La Trobe University,Bundoora,VIC 3083,Australia

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国家自然科学基金Talent Startup Foundation of Guangzhou University

31901212RP2020079

2024

10.1016/j.pld.2023.07.006

植物多样性(英文)
中国科学院昆明植物研究所，中国植物学会

植物多样性(英文)

CSTPCD
影响因子：0.617
ISSN：2096-2703
年,卷(期)：2024.46(1)
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