Anthropogenic Matrices Favor Homogenization of Tree Reproductive Functions in a Highly Fragmented Landscape.

Autor: Carneiro MS; Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP-SP), Cidade Universitária Zeferino Vaz, Barão Geraldo, Campinas, SP CEP 13083-970, Brazil., Campos CC; Instituto de Ciências da Natureza, Universidade Federal de Alfenas (UNIFAL-MG), Rua Gabriel Monteiro da Silva, n.700, Alfenas, MG CEP 37130-000, Brazil., Beijo LA; Instituto de Ciências Exatas, Universidade Federal de Alfenas(UNIFAL-MG), Rua Gabriel Monteiro da Silva, n.700, Alfenas, MG CEP 37130-000, Brazil., Ramos FN; Instituto de Ciências da Natureza, Universidade Federal de Alfenas (UNIFAL-MG), Rua Gabriel Monteiro da Silva, n.700, Alfenas, MG CEP 37130-000, Brazil.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2016 Oct 19; Vol. 11 (10), pp. e0164814. Date of Electronic Publication: 2016 Oct 19 (Print Publication: 2016).
DOI: 10.1371/journal.pone.0164814
Abstrakt: Species homogenization or floristic differentiation are two possible consequences of the fragmentation process in plant communities. Despite the few studies, it seems clear that fragments with low forest cover inserted in anthropogenic matrices are more likely to experience floristic homogenization. However, the homogenization process has two other components, genetic and functional, which have not been investigated. The purpose of this study was to verify whether there was homogenization of tree reproductive functions in a fragmented landscape and, if found, to determine how the process was influenced by landscape composition. The study was conducted in eight fragments in southwest Brazil. The study was conducted in eight fragments in southwestern Brazil. In each fragment, all individual trees were sampled that had a diameter at breast height ≥3 cm, in ten plots (0.2 ha) and, classified within 26 reproductive functional types (RFTs). The process of functional homogenization was evaluated using additive partitioning of diversity. Additionally, the effect of landscape composition on functional diversity and on the number of individuals within each RFT was evaluated using a generalized linear mixed model. appeared to be in a process of functional homogenization (dominance of RFTs, alpha diversity lower than expected by chance and and low beta diversity). More than 50% of the RFTs and the functional diversity were affected by the landscape parameters. In general, the percentage of forest cover has a positive effect on RFTs while the percentage of coffee matrix has a negative one. The process of functional homogenization has serious consequences for biodiversity conservation because some functions may disappear that, in the long term, would threaten the fragments. This study contributes to a better understanding of how landscape changes affect the functional diversity, abundance of individuals in RFTs and the process of functional homogenization, as well as how to manage fragmented landscapes.
Competing Interests: We confirm that funding received from Vale SA does not alter our adherence to PLOS ONE policies on sharing data and material.
Databáze: MEDLINE
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