Estudo da diversidade da macrofauna edáfica em um fragmento de floresta estacional semidecidual montana em Corumbataí do Sul - PR

Abstract

The soil macrofauna's main role to direct participation in ecosystem dynamics, as in nutrient cycling processes and soil structuration which occupy several trophic levels in the food chain interfering with the primary production. This study aimed to characterize the soil macrofauna in a fragment of tropical semideciduous forest montana Corumbataí located in the municipality of South PR. The study period covered the winter and spring, covering the months of August to December. Monthly collections of litter and soil were carried out totaling five collections with subsequent screening for quantification of fauna. It is also captured in the same periods, except in August, invertebrates by trapping "pitfall-traps". The most common orders were Hymenoptera and Coleoptera, which are within the social functional groups and predators, respectively. From statistical analysis, it was found that in November there was a higher number of individuals collected, but showed maximum diversity equal to the month of September, which obtained a smaller number of individuals. It was found that the obtained August smaller number of individuals in respect of each month collection, but was more homogeneous, so that the most diverse November. The Hymenoptera order was dominant in every month getting a much larger number of individuals than the other groups, but presented a lower diversity. The strata of collection points proved similar to each other, regardless of the point. In the case of traps analysis showed that the point 1 and 2 are similar around 75%. Between the months of collection, analysis showed that in the months of September and October, individuals were more similar. Thus, soil and vegetation interactions with the functional role of these invertebrates has an important role in maintaining this forest system, and these animals can be used as soil quality bioindicators, as they influence the cycle of organic matter and release nutrients assimilable by plants.