Soil properties and bamboo cover drive the structure of the woody plant community along a forest–savanna gradient

3 de janeiro de 2021

jan 3, 2021

Lorrayne Aparecida Gonçalves, Ana Clara Abadia, Cesar Crispim Vilar, Divino Vicente Silvério, Guarino Rinaldi Colli, Jhany Martins, Leonardo Maracahipes-Santos, Silvio Yoshiharu Ushiwata, Eddie Lenza

Understanding the role of environmental conditions and geographic space on species distributions is a major goal of ecological studies. Here, we investigate the effects of soil properties, a native bamboo (Actinocladum verticillatum (Nees) McClure ex Soderstr) ground cover and geographic distance on species richness and turnover in the Brazilian Cerrado. We established three transects along a forest–savanna gradient (14°41′S and 52°20′W), from the lowland next to a stream to the top of a hill, where we sampled the woody plant community (DBH ≥ 3 cm), soil properties and ground cover of A. verticillatum. We evaluated changes in species composition with a principal coordinates analysis, and the effects of the environmental predictors on species richness using generalised linear models and on species turnover using generalised dissimilarity modelling. We found that species richness increases with K concentration in the soil and decreases with Zn concentration in the soil and bamboo cover. The predictors explained 62% of species turnover, with environmental parameters (soil properties, bamboo cover and altitude) having the most significant contribution (80%), followed by the spatially structured environmental variation (20%). The most important environmental predictors of woody species turnover were soil concentration of Zn, P and K, altitude, and bamboo cover. Changes in species richness and composition in the studied gradient were strongly associated with plot height, bamboo cover and soil content of K, Zn and P. Our findings indicate that nutrient availability and competition with bamboo explain vegetation structure and composition in this region.

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Este projeto está alinhado aos Objetivos de Desenvolvimento Sustentável (ODS).

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Manifesto Cerrado

Manifesto Cerrado

Organizações da sociedade civil pedem uma medida imediata em defesa do Cerrado a ser tomada pelas empresas que compram soja e carne desse bioma, assim como os investidores que atuam nesses setores, no sentido de adotarem políticas e compromissos eficazes para eliminar o desmatamento e desvincular suas cadeias produtivas de áreas naturais recentemente convertidas.