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Analysis of Various Ecological Parameters from Molecular to Community Levels for Ecological Health Assessments  

Lee, Jae-Hoon (Department of Bioscience and Biotechnology, College of Biological Science and Biotechnology, Chungnam National University)
An, Kwang-Guk (Department of Bioscience and Biotechnology, College of Biological Science and Biotechnology, Chungnam National University)
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Abstract
This study was carried out to analyze some influences on ecological health conditions, threaten by various stressors such as physical, chemical and biological parameters. We collected samples in 2008 from three zones of upstream, midstream and downstream, Gap Stream. We applied multi-metric fish assessment index (MFAI), based on biotic integrity model to the three zones along with habitat evaluations based on Qualitative Habitat Evaluation Index (QHEI). We also examined fish fauna and compositions, and analyzed relations with MFAI values, QHEI values, and various guild types. Chemical parameters such as oragnic matter (BOD, COD), nutrients (TP, $NH_3$-N), coli-form number (as MPN), and suspended solids (SS) were analyzed to identify the relationship among multiple stressor effects. Using the sentinel species of Zacco platypus, the population structures and condition factors were analyzed along with DNA damages related with genotoxicant effects by comet assay. This study using all these parameters showed that stream condition was degraded along the longitudinal gradient from upstream to downstream, and the downstream, especially, was impacted by nutrient enrichment and toxicant exposure from the point source, wastewater treatment plant. Overall results indicated that our approaches applying various parameters may be used as a cause-effect technique in the stream health assessments and also used as a pre-warning tool for diagnosis of ecological degradation.
Keywords
fish indicator; molecular level; community level; water quality; biological integrity;
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Times Cited By KSCI : 15  (Citation Analysis)
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