Efeitos da invasão biológica de Artocarpus heterophyllus Lam. sobre a riqueza de espécies da Mata Atlântica, na RPPN Guarirú, Município de Varzedo, Bahia

Abstract

Biological invasions represent threats to biodiversity on a global scale. The Jaqueira Artocarpus heterophyllus Lam., (Moraceae) is a tree species native to Asia and considered invasive in the Atlantic Forest biome. Currently, it makes up the plant community in a dense way of the Guarirú Private Natural Heritage Reserve, Varzedo, Bahia. This work aimed evaluate the loss of richness of native tree species, associated with the presence of exotic species in the interior of the forest fragment, as well as understanding the potential for invasiveness of the population of jackfruit trees, in order to seek subsidies for decision-making on the management of this species in the conservation unit. The study was developed with part of the data from a phytosociological survey carried out using the centered quadrant method, (CAP≥15 cm in inclusion). Species richness was assessed at points before and after densification; was done t test (α=5%); calculated absolute and relative parameters of density and dominance of species and distribution of diameters into size classes was carried out. The results demonstrated a significant loss of native species richness in the occurrence points of the Jaqueira, which presented the highest density and relative dominance, 16% and 40% respectively, with a population distributed mainly in the younger classes, representing a stock of individuals of the species in the community, which highlights the need for more accurate studies for the best way to manage the invasive species in the forest fragment.