Comunidade meiofaunística de um lago formado por atividades mineradoras.

Abstract

The meiofauna is characterized by small animals that live in interstices and particles of sediments, associated with the bottom and in transition to a marine or freshwater environment. In that Study, aimed to characterize meiofaunistic organisms in an open pit mine and lagoon adjacent, with suspended activities and accumulation of water. It is a survey with qualitative approach, carried out in an open pit mine and an adjacent lake, located in a municipality in the microregion of Curimataú Paraibano. For data collection, the scraping method and core for biosedimentary collection. The samples were washed and used as a method of analysis the counting of individuals. A comparison was also made of the results of this research with other studies already carried out. The results point out that the although the mine is not considered a favorable environment for the faunal community, it had presence of individuals in the environment, in addition the mine showed superiority in terms of number of individuals, with Nematoda being the taxon that stood out in relation to the others, followed by from Cladocera. The taxon that obtained the least result was Oligochaeta with only one representative. As for the results of the lake, Rotifera was the only one that was superior in the lake when compared to with mine. It is worth noting that Oligochaeta and Turbellaria were found not only in the lake, which suggests that the lake environment is more conducive to these phyla, as well as Cladocera in the environment of the mine, by the resistance of the organisms themselves. It is clear that more studies in environments with potential contaminants are carried out to better understand how these organisms react and how to facilitate the survival of meiofauna in the region.