Avaliação ambiental da integridade de riachos em parques verdes urbanos

Abstract

Green areas in urban spaces are highly relevant environments in promoting the quality of life of the population, as they provide leisure, recreation, thermal comfort and con tact with nature. Our objective was to evaluate the degree of anthropogenic changes in streams in urban green parks by means of physical, chemical and visual parameters. For that, the environmental parks Antenor Martins, RegoD'água and ArnulphoFioravantewere meas ured in the city of Dourados, MS. A Rapid Habitat Diversity Assessment Protocol (RAP) was applied to assess visual parameters. The physical and chemical parameters of the water were also measured. Our RAP results have characterized the streams of the three parks as "altered". The minimum and maximum dissolved oxygen values in the water were below acceptable levels for the aquatic biota, with averages of 3.2 to 5.4 mg.L-¹. The averages of light inci dence varied from 51 to 64%, indicating absence or reduction of ciliary vegetation. The val ues of pH, temperature, total dissolved solids and electrical conductivity did not indicate envi ronmental degradation. With these results, it was possible to evaluate the integrity of the streams in the parks, which presented changes due to the anthropic actions. Thus, the function of conservation and preservation of biodiversityis not being fully achieved.