Background:We aimed to characterise the geographical distribution of S?rensen-based multi-site dissimilarity(βsor)and its underlying true turnover(βsim)and nestedness(βsne)components for Chinese Lauraceae and to analyse their relationships to current climate and past climate change.Methods:We used ensembles of small models(ESMs)to map the current distributions of 353 Lauraceae species in China and calculatedβsor and itsβsim andβsne components.We tested the relationship between βsor,βsne andβsim with current climate and past climate change related predictors using a series of simultaneous autoregressive(SARerr)models.Results:Spatial distribution of βsor of Lauraceae is positively correlated with latitude,showing an inverse rela-tionship to the latitudinal α-diversity(species richness)gradient.High βsor occurs at the boundaries of the warm temperate and subtropical zones and at the Qinghai-Tibet Plateau due to high βsne.The optimized SARerr model explains βsor and βsne well,but not βsim.Current mean annual temperature determines βsor and βsne of Lauraceae more than anomalies and velocities of temperature or precipitation since the Last Glacial Maximum.Conclusions:Current low temperatures and high climatic heterogeneity are the main factors explaining the high multi-site β-diversity of Lauraceae.In contrast to analyses of the β-diversity of entire species assemblages,studies of single plant families can provide complementary insights into the drivers of β-diversity of evolutionarily more narrowly defined entities.

Ziyan Liao;Youhua Chen;Kaiwen Pan;Mohammed A.Dakhil;Kexin Lin;Xianglin Tian;Fengying Zhang;Xiaogang Wu;Bikram Pandey;Bin Wang;Niklaus E.Zimmermann;Lin Zhang;Michael P.Nobis

CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization&Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province,Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu,610041,China;University of Chinese Academy of Sciences,Beijing,100039,China;Swiss Federal Institute for Forest,Snow and Landscape Research WSL,Zürcherstrasse 111,CH-8903,Birmensdorf Switzerland;Botany and Microbiology Department,Faculty of Science,Helwan University,Cairo,11790,Egypt;Department of Forest Sciences,University of Helsinki,P.O.Box 27,Helsinki,FI-00014,Finland;Academy of Agriculture and Forestry,Qinghai University,Xining,810016,China

森林生态系统（英文版）

[1]Ziyan Liao;Youhua Chen;Kaiwen Pan;Mohammed A.Dakhil;Kexin Lin;Xianglin Tian;Fengying Zhang;Xiaogang Wu;Bikram Pandey;Bin Wang;Niklaus E.Zimmermann;Lin Zhang;Michael P.Nobis-.Current climate overrides past climate change in explaining multi-site beta diversity of Lauraceae species in China)[J].森林生态系统（英文版）,2022(02):186-199

overrides,sne,SARerr

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