MACROINVERTEBRADOS BENTÔNICOS COMO INDICADORES DE RIACHOS DE CAMPINARANA DA MICRORREGIÃO DO VALE DO JURUÁ
Keywords:
Aquatic insects, Amazon, BMWP, Water qualityAbstract
This study aims to evaluate the effects of sand extraction on water quality and the composition of the benthic macroinvertebrate community. Aquatic invertebrates are diverse and their abundance and distribution are influenced by biotic and abiotic factors, making them a great tool in studies of biomonitoring and bioindication in aquatic environments. The samples was carried out in four streams of a campinarana vegetation complex in the State of Acre, Brazil, at impacted and less impacted points affected by sand extraction. A total of 198 macroinvertebrates were collected, belonging to 11 orders and 24 families. There was a significant difference between streams with respect to their community compositions (Pseudo-F = 4.79; P = 0.001). This study identified that the predominance and greater density of families in impacted and non-impacted areas belong to the order Diptera (52.6 ± 30.3), probably due to their opportunistic habits. In addition, impacted streams had less abundance and richness of ETP and were characterized by the BMWP index with “dubious” quality
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