Relationship Between Edaphic Factors and Vegetation in Savannas of the Brazilian Midwest Region

Revista Brasileira de Ciência do Solo

Michellia Pereira Soares¹  Paula Reys¹  Daniel Salgado Pifano¹  Janaílson Leônidas De Sá¹  Patrícia Oliveira Da Silva¹  Thailliny Moraes Santos¹  Fabiano Guimarães Silva¹ 

关键词: canonical correspondence analysis;    soil;    cerrado;    análise de correspondência canônica;    solo;    cerrado;   

DOI  :  10.1590/01000683rbcs20130726

来源: SciELO

【 摘 要 】

The Brazilian savanna is a mosaic of phytophysiognomies influenced by edaphic and topographic factors that range from the occurrence of fires to anthropic disturbance. The goal of this study was a comparative analysis between two cerrado areas in southeastern Goiás, relating the floristic composition and structure of the vegetation to soil properties to better understand the physiognomic characteristics of the region. Twenty-five 20 × 20 m plots were used. All plants with circumference at breast height of more than 15 cm were measured. Soil samples collected at a depth of 0-20 cm were subjected to physical and chemical analyses. Canonical correspondence analysis (CCA) was used to detect possible correlations between the soil properties and species abundance and distribution. The density and total basal area were 1,647 ind/ha and 15.57 m2/ha, respectively, in Ouroana. At this site, 107 species were sampled. In Montes Claros de Goiás, the density and total basal area were 781 ind/ha and 17.62 m2/ha, and 120 species were sampled. The soil texture of Ouroana was sandy and significantly different from the medium to clayey texture of Montes Claros. The soils of both areas are dystrophic, however, more fertile in Montes Claros and aluminum-toxic in Ouroana. The species of vegetation were distributed according to soil fertility levels. The CCAs grouped species according to soil properties that defined location and abundance as well as the phytophysiognomies of the studied areas.

【 授权许可】

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