Avaliação da distribuição de espécies arbóreas e arbustivas em trechos de área ciliar degradada no Cariri paraibano, Brasil.

Abstract

The research aimed to evaluate the floristic composition in degraded riparian area of Caatinga in Serra Branca, Paraiba Semiarid. The sample area centered on the ciliary ecosystem of the stream Lagoa da Serra (Area I) and also for understanding the evolution of successional processes thereof have been associate to survey the riparian forest of a stream contributor (Area II) and an ecosystem of Caatinga adjacent (Area III). The three areas were subdivided into nine sections. The floristic survey 24 species were recorded, which are distributed in 11 families and 23 genera. The predominant component was the tree where there were 19 species. All species were recorded in Area I, however, for the Area II were raised 15 species belonging to 14 families and seven genera and for the III area found 13 species defined in 12 families and six genera. Floristic comparison of environments studied in other surveys indicated a greater similarity with studies in riparian forests in Cariri, highlighting the geographical proximity and the ciliary system as responses to this given factors. Therefore, the riparian vegetation of the Serra da Lagoa stream showed a floristic composition with a reduced number of species compared with other works in most conserved riparian environments, demonstrating the high degree of human disturbance in the area and their susceptibility condition the resulting degradation man's action.