ESTUDO DO IMPACTO AMBIENTAL NA BACIA DO RIO DO BRAÇO ATRAVÉS DE ANÁLISES ECOTOXICOLÓGICAS.
DOI:
https://doi.org/10.18316/84Abstract
O município de Joinville (SC) vem sofrendo com a degradação ambiental provocada pelos despejos industriais, pelo lançamento de esgotos domésticos, pela utilização de agrotóxicos e fertilizantes. Uma vez que o rio do Braço é um importante contribuinte da bacia do rio Cubatão, devido a sua localização geográfica (zona industrial, rural e urbana), seu monitoramento se torna cada vez mais necessário, especialmente quanto à qualidade de suas águas. Para as análises ecotoxicológicas, dos quatro pontos selecionados na bacia, foram utilizados para água os organismos Daphnia similis (Claus, 1876) e para sedimento Hyalella azteca (Saussere, 1858). Os resultados obtidos nas amostras de água não demonstraram efeito tóxico agudo, entretanto nas amostras de sedimentos 3 pontos indicaram toxicidade aguda ao organismo, demonstrando, dessa forma, a necessidade de monitoramento contínuo e de estudos mais detalhados na região.
Palavras-chave: atividades antrópicas, corpos hídricos, ecotoxicologia
ABSTRACT
EVALUATION OF THE ENVIRONMENTAL IMPACT IN HYDROGRAPHIC BASIN OF THE ARM RIVER THROUGH ECOTOXICOLOGICAL ANALYSIS.
The city of Joinville (SC) has suffered from environmental degradation caused by industrial waste, release of sewage and the use of pesticides and fertilizers. Since the Arm River is na important contributor to the basin of Cubatão, due to its geographical location (industrial area, rural and urban), its monitoring becomes increasingly necessary, especially regarding the quality of its waters. For the ecotoxicological tests, the four selected points in the basin were used Daphnia similis for water and Hyalella azteca for sediments. The results obtained in the water samples showed no acute toxic effect, however, in samples of sediments colon indicated acute toxicity to the body, thus demonstrating the need for ongoing monitoring and more detailed studies in the region.
Key words: anthropogenic activities, water bodies, ecotoxicologyDownloads
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