Impacto de construções rurais na comunidade arbórea de mata ciliar no arco do desmatamento da amazônia

Abstract

During the last few decades, it has been noticed that anthropogenic activities causing irreversible damage on natural ecosystems, exerting changes the function and structure of them, resulting in reduction of species and a several ecosystem services. Based on this, the objective of this project was analyse and describe the impact of rural constructions over the structure and compositions of an arboreal community found in a riparian forest. The study was made in a riparian forest of the rivers Caiabi and it's tributary, both placed in Sinop (Mato Grosso, Brasil) belonging to the arc of deforestation in the southern Amazon. Permanent parcels were made for the sampling of it's structure of the arboreal community, and the distance of the rural constructions (reservoirs and not official roads) related to the parcels were measured. The analysis of the impact was made through Models of linear regression to those constructions, considering the distances as explanatory variables of the structure and composition of the parcels. The most representative species were Licania apetala, Licania micranta, Qualea paraensis, Erythroxylum cf. amazonicum. As the models says , the proximity of the reservoirs to each other negatively relates with richness, abundance, basal area and biomass of the arboreal community. The proximity of the unofficial roads had a negatively influence over the wealth and basal area. Rural constructions tend to affect negative the composition of the arboreal community, showing that the forest is going through changes mainly characterised by the retraction of the species diversity.