Taxonomic, phylogenetic, and trait Beta diversity in South American hummingbirds

ABSTRACT: Comparison of the taxonomic, phylogenetic, and traitdimensions of beta diversity may uncover the mechanisms that gen-erate and maintain biodiversity, such as geographic isolation, envi-ronmental filtering, and convergent adaptation. We developed anapproach to predict the relationship between environmental and geo-graphic distance and the dimensions of beta diversity. We tested thesepredictions using hummingbird assemblages in the northern Andes.We expected taxonomic beta diversity to result from recent geo-graphic barriers limiting dispersal, and we found that cost distance,which includes barriers, was a better predictor than Euclidean dis-tance. We expected phylogenetic beta diversity to result from his-torical connectivity and found that differences in elevation were thebest predictors of phylogenetic beta diversity. We expected high traitbeta diversity to result from local adaptation to differing environ-ments and found that differences in elevation were correlated withtrait beta diversity. When combining beta diversity dimensions, weobserve that high beta diversity in all dimensions results from adap-tion to different environments between isolated assemblages. Com-parisons with high taxonomic, low phylogenetic, and low trait betadiversity occurred among lowland assemblages separated by the An-des, suggesting that geographic barriers have recently isolated lineagesin similar environments. We provide insight into mechanisms gov-erning hummingbird biodiversity patterns and provide a frameworkthat is broadly applicable to other taxonomic groups.

• Autores: Weinstein, Ben; Tinoco, Boris; Parra Vergara, Juan Luis; Brown, Leone; McGuire, Jimmy; Stiles, Gary; Graham, Catherine
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2014
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/26769
• Acceso en línea: http://hdl.handle.net/10495/26769
• Palabra clave: Isolation; Aislamiento; Aves - clasificación; Birds - classification; Colombia; Ecuador; Filogenia; Phylogeny; Environment; Medio ambiente; http://aims.fao.org/aos/agrovoc/c_37744; http://aims.fao.org/aos/agrovoc/c_2593
• Rights: openAccess
• License: https://creativecommons.org/licenses/by-nc/4.0/