Macrozoobenthic community structure and dynamics in Cerna River (western Romania)
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2011, Vol 4, Issue 1
Abstract
In order to determine water quality in Cerna River, researchers carried out analyses into the structure and dynamics of benthic macroinvertebrates communities as well as into the physical-chemical factors. 12 Groups of macroinvertebrates were identified. Density, abundance and frequency values recorded for benthic communities varied according to the physical-chemical conditions specific to each sample collecting station. Researchers noticed a direct influence of Băile Herculane town and dam upon the community submitted to study, the maximum density and percentage numerical abundance being established for Oligochaeta and Diptera, benthic groups tolerant to changes in aquatic ecosystems qualitative parameters. The community of organisms including Ephemeroptera, Trichoptera, Plecoptera, Odonata and Coleoptera was characterized by a decrease in density and abundance values upstream -downstream as water quality is more and more degraded. This deterioration is also emphasized by the biotic index EPT/Ch values.
Authors and Affiliations
Cosmina-Simona Răescu, Mălina Dumbravă-Dodoacă, Milca Petrovici
Keywords
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