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Aspectos da variação ambiental em uma floresta de galeria em Itutinga, MG, Brasil.

Authors: van den Berg, Eduardo; Santos, Flavio Antonio Maës dos;

Aspectos da variação ambiental em uma floresta de galeria em Itutinga, MG, Brasil.

Abstract

Foi caracterizada a heterogeneidade ambiental em uma área de floresta de galeria (7,55 ha), em Itutinga, MG, Brasil, pelas variações das propriedades químicas e físicas do solo, da topografia e da abertura de dossel. As propriedades do solo e a topografia foram estudadas em 28 parcelas de 10 x 30 m utilizadas em um levantamento da comunidade arbóreo-arbustiva da área. Para a abertura do dossel utilizaram-se duas transecções de 50 m de largura, compostas por parcelas contíguas de 10 x 10 m, cruzando a floresta de lado a lado, perpendicularmente ao curso d'água. Fotos hemisféricas foram tomadas sobre estacas alternadas das extremidades das parcelas. Os dados de solo e topografia foram analisados por meio de uma PCA (Análise dos Componentes Principais) e a abertura do dossel mediante gráficos de tendência e regressão linear. A variação mais importante em termos de solos e abertura do dossel se deu no sentido do distanciamento da borda da floresta e aproximação do curso d'água. Nesse sentido, a abertura do dossel diminuiu (b = -0,096; R2 = 0,34) e a umidade e acidez do solo aumentaram (Eixo 1 do PCA, autovalor = 9,713). Os maiores valores da abertura do dossel próximo à borda foram explicados pela entrada de luz lateral através da borda da floresta com o campo limpo circundante.

Keywords

gradiente ambiental, umidade do solo, S, soil humidity, Agriculture, Forestry, environment gradient, floresta de galeria, SD1-669.5, luz, light, gallery forest

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
10
Average
Average
Average
Green
gold