文献类型：期刊文献

英文题名：Identifying the patterns of changes in alpha- and beta-diversity across Dacrydium pectinatum communities in Hainan Island, China

作者：Liu, Haodong[1,2] Liu, Hua[1,2] Chen, Yongfu[1,2] Xu, Zhiyang[2,3] Dai, Yunchuan[4] Chen, Qiao[1,2] Ma, Yongkang[1,2]

第一作者：Liu, Haodong

通信作者：Chen, Q[1]|[a0005e604c56678d970cd]陈巧;

机构：[1]Chinese Acad Forestry, Res Inst Forest Resource Informat Tech, Beijing, Peoples R China;[2]NFGA, Key Lab Forest Management & Growth Modelling, Beijing, Peoples R China;[3]Natl Forestry & Grassland Adm, East China Inventory & Planning Inst, Hangzhou, Peoples R China;[4]Chinese Acad Forestry, Res Inst Forest Ecol Environm & Protect, Beijing, Peoples R China

年份：2021

卷号：11

期号：9

起止页码：4616-4630

外文期刊名：ECOLOGY AND EVOLUTION

收录：;Scopus(收录号：2-s2.0-85102435927);WOS:【SCI-EXPANDED(收录号:WOS:000628326900001)】；

基金：This work was supported by the Fundamental Research Funds for the Central Nonprofit Research Institution of CAF (CAFBB2017ZB004).

语种：英文

外文关键词：biodiversity hotspots; coexistence; community assembly; habitat filtering; phylogenetic diversity

摘要：Exploring vegetation distribution spatial patterns facilitates understanding how biodiversity addresses the potential threat of future climate variability, especially for highly diverse and threatened tropical plant communities, but few empirical studies have been performed. Dacrydium pectinatum is a constructive and endangered species in the tropical mountain forests of Hainan Island, China. In this study, sixty-eight 30 m x 30 m permanent plots of D. pectinatum were investigated, and species-based and phylogenetic-based methods were used to analyze the alpha- and beta-diversity pattern variation and its key drivers. Our study showed that species and phylogenetic alpha-diversity patterns are different on a local scale. However, on a regional scale, the variations in the two alpha-diversity patterns tend to converge, and they decrease with increasing elevation. The phylogenetic structure changes from overdispersion to convergence with increasing elevation. Soil (SOM, TP, AP), topography (EL, SL), and stand (CD) factors and alpha-diversity showed close correlations. Species and phylogenetic beta-diversity have significant positive correlations with changing environmental distance and geographical distance; however, as a representative form of habitat heterogeneity, elevation distance has a greater impact on beta-diversity changes than geographical distance. In conclusion, the alpha- and beta-diversity patterns of the D. pectinatum community are mainly related to habitat filtering, especially in high-elevation areas, and the colonization history of various regions also affects the formation of diversity patterns. Species-based and phylogenetic-based methods robustly demonstrated the key role of the habitat filtering hypothesis in community assembly. We believe that more plant diversity patterns need to be explored to understand the biodiversity formation mechanisms in tropical forests. We also recommend strengthening the construction and management of nature reserves to help address the biodiversity loss crisis in endangered tropical plant communities.