Estudo da estrutura do componente arbóreo-arbustivo em área ciliar de caatinga: subsídios para a recuperação de áreas degradadas e suporte para a implantação de sistemas agroflorestais no Semiárido Paraibano.

Abstract

It was aimed at in this work to evaluate structural aspects of the adult stratum and regenerating of a ciliary ecosystem conserved as subsidies for proposition of strategies of ecological recovery of the fitodiversidade in area of Caatinga in the Cariri paraibano. The survey was carried along the stream of Umburana (7°45’15.3’’ S e 36°58’01.6’’ W; altitude 571 m). For the analysis of the structure 51 contiguous parcels of 20 X 10 m have been established. In the bank of seedlings were implanted 51 parcels of 1 X 1 m. Based on VI adult community was raised the first 14 species of greatest ecological importance to relate them to the socioeconomic potential. In the phytosociological survey have been observed, 4,022 of them alive specimens and 151 dead but still standing. the three species of larger VI were: Croton blanchetianus, Croton echioides e Poincianella pyramidalis. The values of diversity and equability have been respectively: 2,67 nats.ind.-1 and 0,70. The seedlings density in the natural regeneration was of 46,666 individuals/ha and related the distribution of the number of individuals for size class the tendency of decrease of the number of plants is had with the increase of the classes. For the stratum regenerante the diversity values and equability were respectively: 2,87 nats.ind.-1 and 0,84. Based on VI species of adult community studied, the most important for recovery were: C. blanchetianus, C. Picris, P. pyramidalis, M. ophthalmocentra, S. macrocarpa, A. pyrifolium A. columbrina, B. cheilantha, S. brasiliensis, C. pisonioides Z. joazeiro, M. catingae, S. obtusifolium, G. laxa, M. urundeuva Not found in the literature information related to the economic potential of C. Picris, S. macrocarpa, C. pisonioides, G. laxa. The other species were related to economic aspects and presented and shown multiplicity of uses.