Urbanization drives biotic homogenization of the avian community in China  

作　　者：Jiewen DENG Younan ZHU Yuelong LUO Yongjing ZHONG Jiahao TU Jiehua YU Jiekun HE 

机构地区：[1]Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring,School of Life Sciences,South China Normal University,Guangzhou,China

出　　处：《Integrative Zoology》2025年第1期60-72,共13页整合动物学(英文版)

基　　金：supported by grants from the National Natural Science Foundation of China(grant no.32271733);the Guangdong Basic and Applied Basic Research Foundation(grant no.2023A1515011045);the Science and Technology Projects in Guangzhou(grant no.2023A04J0121);the National College Student Innovation and Entrepreneurship Training Program(grant no.202310574047).

摘　　要：Urbanization-driven biotic homogenization has been recorded in various ecosystems on local and global scales;however,it is largely unexplored in developing countries.Empirical studies on different taxa and bioregions show conflicting results(i.e.biotic homogenization vs.biotic differentiation);the extent to which the community compo-sition changes in response to anthropogenic disturbances and the factors governing this process,therefore,require elucidation.Here,we used a compiled database of 760 bird species in China to quantify the multiple-siteβ-diversity andfitted distance decay in pairwiseβ-diversities between natural and urban assemblages to assess whether urban-ization had driven biotic homogenization.We used generalized dissimilarity models(GDM)to elucidate the roles of spatial and environmental factors in avian community dissimilarities before and after urbanization.The multiple-siteβ-diversities among urban assemblages were markedly lower than those among natural assemblages,and the distance decays in pairwise similarities in natural assemblages were more rapid.These results were consistent among taxonomic,phylogenetic,and functional aspects,supporting a general biotic homogenization driven by ur-banization.The GDM results indicated that geographical distance and temperature were the dominant predictors of avian community dissimilarity.However,the contribution of geographical distance and climatic factors decreased in explaining compositional dissimilarities in urban assemblages.Geographical and environmental distances ac-counted for much lower variations in compositional dissimilarities in urban than in natural assemblages,implying a potential risk of uncertainty in model predictions under further climate change and anthropogenic disturbances.Our study concludes that taxonomic,phylogenetic,and functional dimensions elucidate urbanization-driven biotic homogenization in China.

关 键 词：β-diversity compositional dissimilarity distance decay generalized dissimilarity modeling 

分 类 号：R71[医药卫生—妇产科学]