Data/hora: 12/06/2024 04:20:33

Provedor de dados: | 39
País: | Brazil
Título: | Effect of fire under the soils on the organization of communities of three remnants of Amazonian savannas
Autores: | Santos,Ronaldo Oliveira dos; Souza,Alan Pena de; Soares,Rubiene Neto; Rabelo,Fernando Galvão; Silva,Breno Marques da Silva e; Costa Neto,Salustiano Vilar da.
Data: | 2020-09-01
Ano: | 2020
Palavras-chave: | Amazon savannas; PCA; CCA; Soil properties; Phytosociological analysis.
Resumo: | ABSTRACT Areas of cerrado (Brazilian savanna) in the Amazon have been poorly studied from the perspective of fire impacts on environmental sustainability, especially with regard to disturbances to soil and vegetation structure. This study aimed to analyze the influence of edaphic variables and fire together on the composition and structure of tree and shrub vegetation of three cerrado remnants in the Amazon. Eight plots were systematically installed in burned and unburned environments in each remnant. Data were submitted to floristic diversity, similarity, and diametric and altimetric structural assessments. Phytosociological parameters were obtained and submitted to Principal Component Analysis (PCA) and Canonical Correspondence Analysis (CCA). A total of 808 individuals (34 species, 30 genera, and 21 families) were recorded. The CCA indicated that the distribution of species is influenced by edaphic factors, as confirmed by the strong direct correlation of tree and shrub species with the reduced nutrition and high acidity of the soils common in the analyzed remnants. Our results support the hypothesis that fire plays a relevant role in structuring vegetation since it contributed to good indicators of soil properties and caused changes in the composition of woody species.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000300505
Editor: | Sociedade Botânica do Brasil
Relação: | 10.1590/0102-33062019abb0399
Formato: | text/html
Fonte: | Acta Botanica Brasilica  v.34 n.3 2020
Fonte: | info:eu-repo/semantics/openAccess