Análise da dinâmica sucessional em uma área da caatinga no Cariri Ocidental Paraibano, Brasil.

Abstract

The aim of this study was to evaluate the variability of the vegetation component considering the ecological succession process in a Caatinga area in the Semiarid Paraiba. The work was executed in the Reserved Experimental Area for Studies of Ecology and Dynamics of the Caatinga of the Laboratory of Ecology and Botany - LAEB/CDSA/UFCG (7°39'38.8 '' S and 36°53'42.4 '' W; 538 m of altitude). In this space, have been deployed to monitor the evolution of ecological succession, 17 parcels of 1x1 m. The selected area have been recorded in 404 monitoring (period from 01/01/2013 to 07/31/2015) 7,657 individuals in 32 species (29 herbaceous species and three the tree and shrub component). The germination peaks for species and seedlings were variable with respect to time and precipitation. Particularly in analysis the succession dynamics of the shrub and tree component, germinated on the monitored system: Jatropha mollissima (Pohl) Baill, Poincianella pyramidalis (Tul.) L. P. Queiroz and Croton blanchetianus Baill. The species were represented by three, one and 35 individuals respectively. Considering the individuals registered the shrub and tree component, registered is that they all died in the monitored parcels. Therefore, the data generated are shown of great importance for the understanding of the elements that define the succession dynamics of the vegetation component, offering subsidies for the restoration of degraded ecosystems.