efeitos de solos e topografia sobre a distribuição de espécies arbóreas em um fragmento de floresta estacional semidecidual, em luminárias,mg effects of soils and topography on the distribution of tree species in a fragment of tropical seasonal forest in luminárias, se brazil
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ID: 185878
2007
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Abstract
O objetivo deste trabalho foi analisar correlações da distribuição de espécies arbóreas com variáveis ambientais em um fragmento de floresta estacional semidecidual conhecido como "Mata do Galego", o qual possui cerca de 77 ha e está localizado a 21°29'S e 44°55'W, às margens do rio Ingaí. O levantamento da comunidade arbórea, dos solos e da topografia foi realizado por meio de amostragem sistemática, em 32 parcelas de 20 x 20 m, distribuídas em três transeções, da margem do rio até a borda da mata. Foram registrados todos os indivíduos arbóreos, vivos, com circunferência à altura do peito (CAP) > 15,5 cm. As variáveis químicas e físicas do solo foram obtidas das análises de amostras superficiais de solo (0-20 cm) de cada parcela. As variáveis topográficas foram obtidas por meio de um levantamento topográfico dentro e entre parcelas. Foram inventariados 2.343 indivíduos de 159 espécies, 50 famílias e 109 gêneros. As análises de gradientes, realizadas por meio de análise de componentes principais, análise de correspondência canônica e análise de correspondência retificada, indicaram que as parcelas localizadas em áreas de transição com campo de altitude foram as que mais se diferenciaram das demais. As variáveis relacionadas com a acidez e textura do solo apresentaram maior correlação com a distribuição das espécies.
The objective of the present study was to analyze the correlations between tree species distribution and environmental variables in a fragment of tropical seasonal forest in Luminárias, SE Brazil. The fragment, locally known as "Mata do Galego", has an area of c. 77ha, and is located on the margin of the Ingaí River at the coordinates 21°29'S and 44°55'WG. The survey of the tree community, soils and topography was carried out through systematic sampling with 32 sample plots with 20 x 20m distributed on three transects which extended from the river margin to the forest edge. In these plots, all living individual trees with circumference at breast height (cbh) > 15.5cm were recorded. Soil chemical and physical variables were obtained from the analysis of topsoil samples (0-20cm) taken from the center of each plot. Topographic variables were obtained from a topographic survey of the plots and adjacent areas. The survey recorded 2343 individuals belonging to 159 species, 109 genera, and 50 families. The gradient analysis; performed through principal components analysis (PCA), canonical correspondence analysis (CCA), and detrended correspondence analysis (DCA); indicated that the plots located near the forest edge and transitional to the montane grasslands are the most differentiated. Variables related to soil pH and texture produced the strongest correlations with the distribution of tree species.
The objective of the present study was to analyze the correlations between tree species distribution and environmental variables in a fragment of tropical seasonal forest in Luminárias, SE Brazil. The fragment, locally known as "Mata do Galego", has an area of c. 77ha, and is located on the margin of the Ingaí River at the coordinates 21°29'S and 44°55'WG. The survey of the tree community, soils and topography was carried out through systematic sampling with 32 sample plots with 20 x 20m distributed on three transects which extended from the river margin to the forest edge. In these plots, all living individual trees with circumference at breast height (cbh) > 15.5cm were recorded. Soil chemical and physical variables were obtained from the analysis of topsoil samples (0-20cm) taken from the center of each plot. Topographic variables were obtained from a topographic survey of the plots and adjacent areas. The survey recorded 2343 individuals belonging to 159 species, 109 genera, and 50 families. The gradient analysis; performed through principal components analysis (PCA), canonical correspondence analysis (CCA), and detrended correspondence analysis (DCA); indicated that the plots located near the forest edge and transitional to the montane grasslands are the most differentiated. Variables related to soil pH and texture produced the strongest correlations with the distribution of tree species.
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| Authors | ;Luciene Alves Rodrigues;Douglas Antônio de Carvalho;Ary Teixeira de Oliveira Filho;Nilton Curi |
| Journal | journal of veterinary medical research |
| Year | 2007 |
| DOI |
10.1590/S0100-67622007000100004
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| URL | |
| Keywords | Keywords not found |
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