Dinâmica de populações arbóreas em área de cerrado sujeito ao fogo

Detalhes bibliográficos
Ano de defesa: 2010
Autor(a) principal: Leite, Marcelo Boccia
Orientador(a): Matos, Dalva Maria da Silva lattes
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de São Carlos
Programa de Pós-Graduação: Programa de Pós-Graduação em Ecologia e Recursos Naturais - PPGERN
Departamento: Não Informado pela instituição
País: BR
Palavras-chave em Português:
Área do conhecimento CNPq:
Link de acesso: https://repositorio.ufscar.br/handle/20.500.14289/1985
Resumo: Fire is a common disturbance in the Brazilian savanna and their action can affect important parameters and, consequently, the rate of population growth. The matrix models are powerful tools for studies of population dynamics, this models provide a projection of the rate of population growth. The aim of this study was to investigate the influence of fire on the population growth rate through the use of matrix models. The study was carried out in the cerrado sensu stricto site in southeastern Brazil. The individuals Anadenanthera falcata, Dalbergia miscolobium and Xylopia aromatica were divided on class size and populations growth rates were found through the model matrix Lefkovitch. There was an increase in the number of seedlings and sprouts between intervals studied. The rates of population growth remained close to 1; the survival of adults was fundamental population growth of X. aromatica. We can conclude that the fire favored vegetative reproduction and sexual differently among species, and that sexual reproduction was more intense in D. miscolobium. The growth rates indicate that the three species are resilient to fire and the vegetative reproduction contributed little to the population growth of X. aromatica, indicating that adult survival is important for the establishment of this species.