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Environmental factors affecting physiognomic and floristic variation in an area of cerrado in central Brazil

Published online by Cambridge University Press:  10 July 2009

Ary Teixeira De Oliveira-Filho ,
George John Shepherd ,
Fernando Roberto Martins  and
William Henry Stubblebine
Ary Teixeira De Oliveira-Filho
Affiliation:
Departamento de Ciências Florestais, Escola Superior de Agricultura de Lavras, 37200 Lavras, MG, Brazil
George John Shepherd
Affiliation:
Departamento de Botânica, Universidade Estadual de Campinas, 13081 Campinas, SP, Brazil
Fernando Roberto Martins
Affiliation:
Departamento de Botânica, Universidade Estadual de Campinas, 13081 Campinas, SP, Brazil
William Henry Stubblebine
Affiliation:
Departamento de Botânica, Universidade Estadual de Campinas, 13081 Campinas, SP, Brazil
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Abstract

Cerrado is a species-rich savanna-like vegetation that covers a large area in central Brazil. Soil, and particularly soil fertility, is considered to be the major factor determining the wide and diverse physiognomic-floristic gradients encountered within cerrado vegetation. To describe the vegetational variations within a cerrado in southern Mato Grosso state (15° 21'S, 55° 49'W), a 1 ha transect was located to pass through an interfluvial cerrado and climb a steep talus slope. The vegetational and environmental variations are described by means of field classification, direct gradient analysis and reciprocal averaging ordination. The effects of differences in ground water regime in the interfluvial cerrado and differences in inclination with associated rockiness in the talus cerrado are related to the vegetational variations. As the soils are very similar in texture and in the majority of chemical properties, the role of the above environmental factors was more easily distinguished. In the interfluvial cerrado, the vegetation variations are probably related to the seasonal fluctuation in water table level.

Keywords

Brazilcerrado vegetationground waterNeotropicssavannasoiltopography
Type
Research Article
Information
Journal of Tropical Ecology , Volume 5 , Issue 4 , November 1989 , pp. 413 - 431
Copyright
Copyright © Cambridge University Press 1989

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