Journalartikel

Jahr der Veröffentlichung: 1987

Seiten: 55-5+

Zeitschrift: Phyton: Annales rei Botanicae

Bandnummer: 27

Heftnummer: 1

ISSN: 0079-2047

Verlag: Institut für Biologie, Universität Graz, Austria) und Verlag Ferdinand Berger

Abstract: 
An analysis is presented of a square hectare of cerrado in the middle of Sao Paulo State, Brazil. When examined it was in a rather dense tree and scrub woodland phase, slowly returning to its original taller and less dense tree woodland form. Its 1180 trees 3-8 m tall, and 3017 shrubs and treelets (shrub), with trunk circumferences of 10 cm or more at 30 cm vertical height, fell into 54 species, of which 42 occurred in both growth forms. Styrax ferruginea was the most abundant tree in density, basal area, frequency, and cylindrical volume. Erythroxylum suberosum was the most abundant scrub element. A quadrat size of 400 m2 gave the most satisfactory size for frequency measurements. Long thin rectangles gave slightly greater frequencies than more equidimensional ones of the same area. Importance curves based on different measures of species quantity of the same complete census had forms varying between the random niche boundary model and the log normal. The trees alone, the scrub elements alone, and the two combined, considering all species together, are slightly clumped on a 10 .times. 10 m scale. The individual species are also almostly clumped, both on a small and large scale. All measures of species quantity, are strongly correlated with each other. Heights of individuals of different species are correlated with their trunk circumferences on either a linear, logarithmic, or power function regression. Ten percent area samples of density for the hectare, of trees and scrub combined, and for the individual species, are not accurate compared to the complete census, nor is a point-quarter sample using 20 points. Cylindrical volume growth over a 3-year period was an average 1985 cm3 per year per surviving individual, or 5.22 m3 per year for the hectare. The average foliage cover above eye level is 41%. A heavy frost decreased the cover but the effect was temporary.

Harvard-Zitierstil: SILBERBAUERGOTTSBERGER, I. and EITEN, G. (1987) A HECTARE OF CERRADO .1. GENERAL-ASPECTS OF THE TREES AND THICK-STEMMED SHRUBS, Phyton: Annales rei Botanicae , 27(1), pp. 55-5+

APA-Zitierstil: SILBERBAUERGOTTSBERGER, I., & EITEN, G. (1987). A HECTARE OF CERRADO .1. GENERAL-ASPECTS OF THE TREES AND THICK-STEMMED SHRUBS. Phyton: Annales rei Botanicae . 27(1), 55-5+.