Atributos taxonômicos de macroinvertebrados e grupos funcionais de alimentação de Chironomidae comO ferramenta para avaliação de lagos de inundação na Amazônia Brasileira

Abstract

Floodplain lakes are important environments for many aquatic organisms. Despite all their ecological importance, these environments have suffered from the advance of anthropic activities. One of the affected groups is the macroinvertebrates. These organisms inhabit the various types of environments and participate in important ecosystem services, and are considered bioindicator organisms. With this, we analyzed the effects of environmental factors, as well as land use and land cover on the structure of the macroinvertebrate community. For this, we used nine lakes in the municipalities of Santarém (five) and Oriximiná (four). During the samplings we measured the pH, Dissolved Oxygen, Temperature, electrical conductivity and turbidity and evaluated the land use and cover through the Qgis software and classified them into forest areas, non-forest natural formations, agriculture, urban areas and temporary crops. The macroinvertebrates collected through tracks on the banks of the. We use multivariate analyses to analyse our data. Our results suggest that areas with larger forest cover areas and low temperatures supported a greater diversity of macroinvertebrates, while urbanized areas with high temperature and lower vegetation cover had a less diverse community dominated by tolerant species. There are few studies on the composition, richness and distribution of macroinvertebrates and evaluations of their environmental impacts in Amazonian clearwater lakes, making comparisons between the results difficult. This study provides information on the composition, richness, and abundance of macroinvertebrates, the effects of environmental variables, land use, and land cover on these organisms in flood lakes in Central Amazonia.