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Rural and Urban Streams: Anthropogenic Influences and Impacts on Water and Sediment Quality

✍ Scribed by Adelina Maria Kühl; Carmen Lúcia Mello Sartori Cardoso da Rocha; Evaldo Luiz Gaeta Espíndola; Fábio Amodêo Lansac-Tôha

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
187 KB
Volume
95
Category
Article
ISSN
1434-2944

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✦ Synopsis

Abstract

The Pirapó river watershed (Paraná State, Brazil) compounds a relatively industrialized and urbanized region, undergoing great pressure from the discharge of industrial, agricultural and domestic wastes. We evaluated the environmental quality of ten streams belonging to this watershed in April and June 2008 by performing acute and chronic toxicity tests with Daphnia similis and Ceriodaphnia silvestrii from water and sediment samples. We tested the hypothesis that the streams located in urban areas are more exposed to the influence of pollutants, than those outside the city limits. In addition, we obtained the measures of physical and chemical parameters, and identified the main polluted sources. Contrary to what was expected, the rural streams were more toxic than those located in urban area. These results demonstrate that the water bodies located in rural areas are being affected by the pollution of aquatic ecosystems as far as those found in urban areas, requiring the same attention of environmental managers in relation to its monitoring. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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