Correlation of colonizing species with substrate in abandoned areas of gold mining

Abstract

The mining activity, important for promoting economic growth and social welfare, has been responsible for the modification of large tracts of landscape nationwide. Thus, this work aimed to relate the colonizing species of the area of gold mining with the substrate, in Diamantina, Minas Gerais state. An area under study was stratified into three locations, with ten contiguous plots measuring 10 x 10 m each in each location, where all individuals with shrubs with (DAS30≥ 3 cm) were sampled and recorded. Soil composite samples were collected at a depth of 0 cm to 20 cm in each of the thirty plots and analyzed the levels of sand, silt, clay, organic matter, pH, P, K, Ca, Mg, S, Al, (H + Al), (V%) (SB), CTC at pH 7, (T), CTC (t) (m%). The influence of environmental variables on the density of the sampled species was analyzed by using the canonical correspondence analysis, verifying the significant correlation between them (P> 0.01) by the Monte-Carlo test. Nine-hundred and nine (909) individuals were found, belonging to 30 botanical families, 64 genera and 86 species. The variables most strongly related to vegetation were silt, pH and V. The species Trembleya parviflora, Myrcine guianensi, Trembleya laniflora, Baccharis brachylaenoides, Tibouchina candoleana, Tibouchina mutabilis e Pseudobrickellia angustissima,occurred were more abundant in soils with high pH, base saturation and high proportions of sand may eventually be shown as potential in the recuperation of mined areas with similar conditions to the area.

Keywords:
Ecological succession; Natural regeneration; Species-environment relation; Passive restoration