Bamboo thickets alter the demographic structure of Euterpe edulis population: A keystone, threatened palm species of the Atlantic forest

Autor(es)

Rother, Debora Cristina ^{[1, 2]} ; Rodrigues, Ricardo Ribeiro ^[1] ; Pizo, Marco Aurelio ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, ESALQ, Dept Ciencias Biol, Lab Ecol & Restauracao Florestal, Av Padua Dias, 11, Caixa Postal 9, BR-13418900 Sao Paulo - Brazil

^[2] UNESP Univ Estadual Paulista, Programa Posgrad Biol Vegetal, Av 24 A, 1515, BR-13506900 Rio Claro, SP - Brazil

^[3] UNESP Univ Estadual Paulista, Dept Zool, Av 24 A, 1515, BR-13506900 Rio Claro, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY; v. 70, p. 96-102, JAN 2016.
• Citações Web of Science: 4

Resumo

The rapid spread of bamboos can strongly affect forest structure by interfering plant regeneration and reducing local biodiversity. Considering that bamboos exert a negative influence on the plant community, our main goal was to investigate how this influence manifests at the population level. We compared the demographic structure of the threatened palm Euterpe edulis between bamboo and non-bamboo dominated patches within the Atlantic forest. In the study site, the native bamboo Guadua tagoara has created a marked patchiness and heterogeneity in the vegetation. Plots were set up randomly in bamboo and non-bamboo patches and the heights of all E. edulis individuals were measured. Data from canopy openness and litter depth were collected for both patches. Greater number of E. edulis was recorded in bamboo patches. However, frequency distribution of the height classes differed between patches revealing a predominance of seedling and sapling I classes in bamboo patches, in comparison to a more evenly distribution of height classes in non -bamboo patches. The canopy in bamboo patches was more open and the litter depth was thicker. Our analyses evidenced G. tagoara is functioning as a demographic bottleneck of natural population of E. edulis by arresting its later stages of regeneration and in high densities that bamboos may limit recruitment of this palm species. (C) 2015 Elsevier Masson SAS. All rights reserved. (AU)

• Processo FAPESP: 99/09635-0 - Diversidade, dinâmica e conservação de árvores em florestas do estado de São Paulo: estudos em parcelas permanentes
• Beneficiário: Ricardo Ribeiro Rodrigues
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 03/11073-7 - Influencia dos bambus na chuva de sementes e estabelecimento de plan tulas na mata atlantica.
• Beneficiário: Debora Cristina Rother
• Modalidade de apoio: Bolsas no Brasil - Mestrado