Data/hora: 06/06/2024 05:38:29

Provedor de dados: | 88
País: | Brazil
Título: | Woody community dynamics in two fragments of "cerrado" stricto sensu over a seven-year period (1995-2002), MA, Brazil
Autores: | Aquino,Fabiana de Gois; Walter,Bruno Machado Teles; Ribeiro,José Felipe.
Data: | 2007-03-01
Ano: | 2007
Palavras-chave: | Fragmentation; Permanent plots; Plant mortality; Recruitment; Savanna.
Resumo: | This study was conducted in two fragments of "cerrado" stricto sensu in the Gerais de Balsas Colonization Project, located in southern Maranhão, Brazil. The objective was to evaluate the dynamics of the woody plant community, over seven years (1995-2002). Four transects of 160 × 20 m were monitored. All woody plants with a stem diameter &gt; 3 cm, at 0.30 m above ground level, were recorded. In 1995, 983 and 1,177 stems were sampled in fragments 1 and 2, respectively; in 2002, 1057 and 1406 stems were sampled in the same fragments. In 1995, the Shannon diversity indices (H') were 3.07 and 3.33, in fragments 1 and 2, respectively, reaching their maximum value in 2002 of 3.11 and 3.35. The community of fragment 1 showed an increase of 7.5% in density and 4.4% in basal area between 1995 and 2002, while in fragment 2 there was an increment of 19.4% in density and 23.5% in basal area, over the same period. The annual increment in diameter was 0.13 cm year-1 and 0.17 cm year-1 in fragments 1 and 2, respectively. The mortality rate was 2.73% per year in fragment 1 and 4.88% per year in fragment 2, while the recruitment rate was 3.25% per year and 5.86% per year, respectively. The community presented high recruitment and mortality rates compared to the studies conducted in other sites, indicating a community that was highly dynamic in the period studied.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000100011
Editor: | Sociedade Botânica de São Paulo
Relação: | 10.1590/S0100-84042007000100011
Formato: | text/html
Fonte: | Brazilian Journal of Botany  v.30 n.1 2007
Fonte: | info:eu-repo/semantics/openAccess