Avaliação da abundância e biomassa da biodiversidade do solo, com ênfase a insetos saprófagos, na comunidade Itupiranga, Marabá-Pa.

Abstract

This work is part of the project "Biodiversity and Soil Functioning in the Context of Family Farming in the Amazon" and aimed to analyze the diversity of soil fauna and the composition and abundance of populations of organisms present in the soil, with emphasis on saprophytic insects in the community Itupiranga-Marabá -PA. The capture of soil fauna was carried out from manual collections and with Winckler's extractors. The insects were preserved in 70% alcohol for later identification. The collections were made in two different environments: secondary vegetation and pasture. In the preliminary analyses a total of 11 orders of arthropods were obtained. The most abundant order in the secondary vegetation area was Isoptera (termites), followed by Hymenoptera and Acari was the third most abundant order. For the pasture environment the most abundant orders were Hymenoptera (predominantly ants), followed by Coleoptera. In the first collection, there was no occurrence of the order Isoptera in the pasture. The secondary vegetation environment presented higher abundance in relation to the pasture environment. These results indicate that the removal of trees can change the microclimate of the forest, decisively influencing the environmental conditions important for the survival of soil fauna, because the forest environment presents vegetation cover with greater species richness and consequently greater diversity of fauna and flora elements than the pasture area.