Assembly structures of coastal woody species of eastern South America:Patterns and drivers  

作　　者：Eduardo Vinícius da Silva Oliveira Myrna Friederichs Landim Sidney F.Gouveia 

机构地区：[1]Graduate Program in Ecology and Conservation,Federal University of Sergipe,São Cristovão,Sergipe,Brazil [2]National Institute of Science and Technology Ecology,Evolution and Conservation of Biodiversity(INCT-EECBio),Goiânia,Goias,Brazil [3]Department of Biology,Federal University of Sergipe,São Cristóvão,Sergipe,Brazil [4]Department of Ecology,Federal University of Sergipe,São Cristóvão,Sergipe,Brazil

出　　处：《Plant Diversity》2024年第5期611-620,共10页植物多样性（英文版）

基　　金：supported by scholarships provided by Fundação de ApoioàPesquisa eàInovação Tecnológica do Estado de Sergipe(FAPITEC)and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior(CAPES,PDPG-postdoc,nº88887.691645/2022-00);SFG was supported by a FAPITEC PRONEM grant(Prof.432/2023);a Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq)Universal grant(Proc.405967/2023-3);supported by CNPq productivity grants(Proc.302552/2022-7).

摘　　要：Tropical regions have provided new insights into how ecological communities are assembled.In dry coastal communities,water stress has been hypothesized to determine plant assembly structure by favoring preadapted lineages from neighboring ecosystems,consistent with functional clustering.However,it is unclear whether this hypothesis is sufficient to explain how coastal communities in tropical ecosystems are assembled.Here,we test whether water stress or other factors drive community assembly in woody plant communities across the coastal zone of Brazil,a tropical ecosystem.We characterized functional and phylogenetic structures of these communities and determined the underlying environmental factors(e.g.,water stress,historical climate stability,edaphic constraints,and habitat heterogeneity)that drive their community assembly.Assemblages of coastal woody species show geographically varied patterns,including stochastic arrangements,clustering,and overdispersion of species relative to their traits and phylogenetic relatedness.Topographic complexity,water vapor pressure,and soil nutrient availability best explained the gradient in the functional structure.Water deficit,water vapor pressure,and soil organic carbon were the best predictors of variation in phylogenetic structure.Our results support the water-stress conservatism hypothesis on functional and phylogenetic structure,as well as the effect of habitat heterogeneity on functional structure and edaphic constraints on functional and phylogenetic structure.These effects are associated with increased phenotypic and phylogenetic divergence of woody plant assemblages,which is likely mediated by abiotic filtering and niche opportunities,suggesting a complex pattern of ecological assembly.

关 键 词：Brazil COMPLETENESS Clustering Restinga vegetation Water constraints 

分 类 号：Q948[生物学—植物学]