DISTRIBUTION OF AQUATIC MACROINVERTEBRATES AND SURFACE WATER QUALITY IN PEDRA BRANCA STATE PARK

Resumo

The presence of bioindicator organisms is directly associated with the preservation of aquatic environments, as they can be sensitive to organic and inorganic pollutants and changes in the limnological characteristics of the water. To carry out this work, field parameters of two rivers of the Pedra Branca State Park, in Rio de Janeiro, Brazil were analyzed during the dry season in June 2018, and sediments with aquatic macroinvertebrates were sampled for the identification of taxa. The collected data were evaluated through Non-Metric Multidimensional Scaling, to analyze the similarity between the composition of organisms in the sampled sites; Redundancy Analysis, to investigate the relationships between biotic and abiotic factors and through the quantitative results of the taxa found, the EPT (Ephemeroptera, Plecoptera and Trichoptera), BMWP (Monitoring Working Party) and IBF (Biotic Index of Families) indices were used to obtain qualitative results on the levels of quality, preservation and pollution of rivers . The results obtained are of great environmental and urban importance, as the rivers of the Pedra Branca State Park are indispensable for the supply of water to the surrounding neighborhoods and directly influence the climate of the municipality of Rio de Janeiro.