Data/hora: 23/06/2024 21:07:09

Biblioteca(s): | Embrapa Cerrados.
Data corrente: | 13/10/1997
Data da última atualização: | 13/10/1997
Autoria: | SILVA, J. F.
Título: | Biodiversity and stability in Tropical Savannas.
Ano de publicação: | 1986
Fonte/Imprenta: | In; SOLBRIG, O.T.; MEDINA, E.; SILVA, J.F., ed. Biodiversity and savanna ecosystem processes; a global perspective. Heidelberg: Springer Verlag, 1996.
Páginas: | p.161-171.
Idioma: | Inglês
Conteúdo: | The stability of savanna plant communities depends on the kind, intensity, and extent of perturbation. This chapter will discuss some aspects of the nature of perturbations taking place in savanna communities, and will put forward the hypothesis that the relative stability of a community on the face of a perturbation depends on its floristic structure. The structure of a plant community, or floristic structure, is used here in a phytosociological sense, involving not only the species composition but also the relative importance of each species. This hypothesis implies that two savanna communities exhibiting the same values of diversity (namely the same diversity index H') may differ in stability if they differ in floristic structure. The hypothesis is based on the fact that individuals from different species react differently to changes in their environment. In turn, this dissimilarity in stability will also depend on the nature of the perturbation. Individual plant responses will affect survival and fertility at the population level. The magnitude of the connection from individual to population will depend on the species' life history traits. This is another reason why community responses to perturbations depend  heavily on the floristic structure. A perturbation can be defined as a sudden and relatively short change in the prevalent environmental conditions...
Palavras-Chave: | Biological differences; Comunidade vegetal; Diferencas biologicas; Savana.
Thesagro: | Biodiversidade; Cerrado; Fogo; Resposta da Planta.
Thesaurus Nal: | biodiversity; forest fires; plant communities; plant response.
Categoria do assunto: | --
Registro original: | Embrapa Cerrados (CPAC)
Exemplares: | CPAC - (10044-1) - ADD - PL - -- - CRI4407 -  - CRI4407 - DIS