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Research on the water quality of the Sasar River (NW Romania) using the normalized global biologic index (NGBI)

Author(s): Oana-Elena MARE-ROSCA | Lucia MIHALESCU | Monica MARIAN | Cristian-Felix BLIDAR

Journal: Analele Universitatii din Oradea, Fascicula Biologie
ISSN 1224-5119

Volume: TOM XVI;
Issue: 1;
Start page: 108;
Date: 2009;
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Keywords: Normalized Global Biologic Index | taxonomic abundance | anthropic pressure | Romania

In order to elaborate the ecologic diagnosis of the Sasar river basin, the Normalized Global Biologic Index (NGBI) was used. This index is standardized in the French normatives of determining the quality of flowing waters.The NGBI method allows the assessment of the general quality of a stream by analyzing the benthic macrofauna, the synthetic expression of the general biologic quality.The investigated area is mostly included within the industrial perimeter of Baia Mare, where the most significant the most significant is the mining industry.The maximum amount of the species belonging to the zoobenthic communities were recorded for upstream of Blidari station followed by the Valea Mariutii station. Severe alterations of the macroinvertebrate communities, in decreasing order of the impact intensity, were recorded in the following stations: Valea Firizei, downstream of Baia Sprie, upstream of Baia Mare and downstream of Baia Mare, the main cause being the anthropic perturbations.
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