Abstract
Anthropogenic interference in urban lotic systems is a factor affecting the biota of waterbodies. Aquatic macro invertebrates are an important food source for fish and are valuable indicators of water quality. The objective of this work was to study Chironomus larvae (Chironomidae: Diptera) distribution along an environmental gradient in Barbado Stream, Cuiaba, MT, Brazil. No individual Chironomus was found in the springs of Barbado Stream, which may indicate preservation of the area. During the study period, we found 40.3 and 94.4 individuals/m 2 at points 3 and 4 (low course), respectively. There is eutrophication in these sites due to domestic sewage discharges, indicating low quality water. The Barbado Stream needs restoration projects that include an awareness of the residents of their neighborhood’s environmental importance, and investments in the sanitation sector to prioritize the collection and treatment of wastewater and solid waste collection.
Highlights
Population growth causes an increase in consumption, space, and housing
Aquatic ecosystems have been altered to different degrees as a negative consequence of anthropogenic activities
Study area The basin of Barbado Stream is located in an urban area in the central-eastern portion of Cuiabá, Mato Grosso State (Brazil), and it flows to Cuiabá River (Figure 1)
Summary
Population growth causes an increase in consumption, space, and housing. Urban centers, which grow very quickly, are a great example, not taking into account the environmental pollution they cause. Aquatic ecosystems are one of the most affected by these changes (Braga et al, 2001). Aquatic ecosystems have been altered to different degrees as a negative consequence of anthropogenic activities (e.g., mining, plumbing, dam construction, eutrophication, etc.). Rivers are impacted by everything that happens in the surrounding areas, to include land use and human occupation. The environmental characteristics of rivers, especially of their resident biological communities, provide information about the consequences of human action (Callisto et al, 2001)
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