Tree structure and diversity of lowland Atlantic forest fragments：comparison of disturbed and undisturbed remnants

作     者：Fabricio Alvim Carvalho Joao Marcelo Alvarenga Braga Marcelo Trindade Nascimento 

作者机构：Departamento de Botanica Universidade Federal de Juiz de Fora. Campus Universitario s/n Sao PedroJuiz de Fora-MG 36036-900 Brazil Instituto de Pesquisas do Jardim Botanico do Rio de Janeiro. Rio de Janeiro-RJ Brazil Laboratorio de Ciencias Ambientais CBB Universidade Estadual do Norte Fluminense Campos dos Goytacazes-RJ 28013-602 Brazil 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2016年第27卷第3期

页      面：605-609页

核心收录：

学科分类：09[农学] 0904[农学-植物保护] 0901[农学-作物学] 

基　　金：supported financially by the Brazilian Ministry of Environment(MMA/FNMA) 

主　　题：Phytosociology Tree community Forestfragmentation . Hotspot Brazil 

摘      要：This study describes the tree community structure of three moist lowland Atlantic Forest fragments in Rio de Janeiro State, southeastern Brazil. Two fragments were disturbed and an undisturbed one was used as reference. Our hypothesis was that disturbed fragments show distinct structural patterns in comparison with undisturbed stands due to past disturbance practices and forest fragmentation. Four 100 ×5 m sampling plots were demarcated in each fragment and all live and dead trees with DBH C 5 cm were located, measured and identified. The results supported our hypothesis, due to the high values found for standing dead trees, an increase of dominance of a few pioneer species, lower values of large trees and species richness in disturbed fragments in comparison with the undisturbed one. The advanced fragmentation process in the Southern Brazilian lowland areas and the high species richness in undisturbed areas highlight these forest fragments as priority areas for conservation and management.