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

Abstract

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 m 2 /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 m 2 /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.

Soil characteristics influence species composition and forest structure differentially among tree size classes in a Bornean heath forest

“…It is noteworthy that available Al covaries with soil depth and elevation and is directly linked to a decrease in the H:Al ratio. In Brazilian cerrado ecosystems, a similar pattern of increasing Al with elevation was observed to underpin species composition (Guidão et al 2002, Abreu et al 2012, Soares et al 2015, Silva et al 2016. Aluminium is abundant in clay-rich acidic soils and, together with H + , is toxic for plants.…”

Distribuição Da Biomassa No Cerrado E a Sua Importância Na Armazenagem Do Carbono

“…O estudo da produção primária possui importância principalmente para o entendimento das transferências de energia entre os diferentes níveis tróficos de um ecossistema (MEIRELLES;HENRIQUES, 1992). Entretanto, em virtude do panorama atual de mudanças climáticas, estudos referentes à produção de biomassa em diferentes ecossistemas vêm sendo desenvolvidos visando ao conhecimento do potencial para redução dos gases causadores do efeito estufa, particularmente o dióxido de carbono (SCHROEDER, 1992;HIGUCHI et al, 1998;SANQUETTA, 2002;SOARES;OLIVEIRA, 2002;SOARES;LEITE;GÖRGENS, 2005;PAIXÃO et al, 2006;REZENDE et al, 2006;CORTE;SANQUETTA, 2007;SILVA et al, 2008).…”

Chemical of Soils With Histic Horizon of Lakes and Riparian of the Savanna, Northern Amazonia, Brazil

“…M. Carvalho, C. M. Carvalho, & Morais, 2016). Savana is an ecosystem that is fragile and susceptible to the impact of human occupation and the use of fire (Furley, 2010;Soares et al, 2015;Zinck, 2011). (Morais & Carvalho, 2015).…”