Abstract
ABSTRACT This study aimed to analyze relations between the distribution of tree species and variations in soil texture, fertility and organic matter levels in a rupestrian cerrado area located in Diamantina-MG. Individual trees with circumference at soil level (PC) ≥ 3 cm were sampled in 10 plots of 20x50m. Samples of surface soil (0.00-0.20 m of depth) were collected from each plot and analyzed for their chemical and physical properties. Through canonical correspondence analysis, Eremanthus incanus, Kielmeyera lathrophyton, Terminalia sp and Vochysia discolor show a stronger relation to higher potassium and remaining phosphorus levels; the species Xylopia sericea, Protium spruceanum and Protium heptaphyllum show a stronger relation to higher levels of organic matter and total cation exchange capacity; the species Roupala montana, Qualea grandiflora, and Erythroxylum suberosum grew uniformly in all plots. There is relation between species distribution and chemical and physical soil variables in the area.
Highlights
The Cerrado has one of the greatest biological diversities on the planet
This study aimed to analyze relations between the distribution of tree species and variations in soil texture, fertility and organic matter levels in a rupestrian cerrado area located in Diamantina-MG
Eremanthus incanus, Kielmeyera lathrophyton, Terminalia sp and Vochysia discolor show a stronger relation to higher potassium and remaining phosphorus levels; the species Xylopia sericea, Protium spruceanum and Protium heptaphyllum show a stronger relation to higher levels of organic matter and total cation exchange capacity; the species Roupala montana, Qualea grandiflora, and Erythroxylum suberosum grew uniformly in all plots
Summary
According to Deus (2011), this biome has an endemic flora of 40%, meaning this percentage of species is unique to Brazilian savannas. With a tropical savanna type formation, the Cerrado covers about 2 million km in Central Brazil, approximately 24% of the national territory (MMA, 2015). There are, several other physiognomies, ranging from clean fields to tree formations. In the Espinhaço Chain, formations of rupestrian cerrado are the dominant vegetation cover, growing on boulders or rocks, in shallow or stony soils of recent origin, or in sandy deposits (Kamino et al, 2008). It is expected that the edaphic and climatic characteristics in these areas of the Cerrado biome influence tree distribution and the floristic pattern
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