Florística e estrutura da regeneração natural de Caatinga Arbórea na Floresta Nacional Contendas do Sincorá, Bahia

Abstract

The aim of this study was to analyze the floristic and structure of natural regenera-tion in an area of Caatinga, in the Contendas do Sincorá National Forest, Bahia. The sampling consisted of 48 plots of 5 x 5 m. The phytosociological parameters used were density, fre-quency, size class and relative natural regeneration. The influence of environmental variables on species density was investigated using Canonical Correspondence Analysis. A total of 771 individuals were sampled, distributed in 22 families, 37 genera and 44 species and nine mor-phospecies. Croton floribundus and Combretum monetaria had the highest indexes of vegeta-tion descriptors. The floristic similarity had the formation of a group with areas of the Sertaneja Setentrional Depression. Mimosa ophthalmocentra had a strong positive relationship with al-titude. Combretum monetaria, Libidibia ferrea and Piptadenia stipulacea were influenced by higher rainfall. The greater precipitation in Flona was decisive for dissimilarity with the other areas.