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Comparative Analysis of Ecological Health Conditions Before and After Ecological Restoration in Changwon Stream and Nam Stream  

Kim, Hyun-Jeong (Department of Bioscience of Biotechnology, College of Biological Science and Biotechnology, Chungnam National University)
Lee, Sang-Jae (Department of Bioscience of Biotechnology, College of Biological Science and Biotechnology, Chungnam National University)
An, Kwang-Guk (Department of Bioscience of Biotechnology, College of Biological Science and Biotechnology, Chungnam National University)
Publication Information
Korean Journal of Ecology and Environment / v.43, no.2, 2010 , pp. 307-318 More about this Journal
Abstract
This study was to analyze the ecological conditions, based on physical habitat, chemical, and biological conditions before (2006, 2007) and after ecological restoration (2009) in five sites of Changwon Stream (CS) and six sites of Nam Stream (NS), respectively, and then to compare ecological health between the two period. The analysis of ecological health was based on the multimetric models of Index of Biological Integrity (IBI) and Qualitative Habitat Evaluation Index (QHEI) along with water chemistry in the streams. For the study, the models of IBI and QHEI were modified as 8 and 11 metric attributes, respectively. For the evaluations, the survey was conducted in the period of 2006~2007 before the restoration and in 2009 after the restoration by the city. Chemical conditions, based on conductivity, in both streams showed a typical longitudinal declines along the axis of the upstream-to-downstream. There were no significant differences (p>0.05) in water quality between the two periods. Values of IBI in the CS and NS averaged 21.6 and 19.7, respectively, indicating a C grade in the criteria of Ministry of Environment, Korea, and there was no significant differences in the IBI between the two periods. Values of QHEI after the restoration averaged 29.2 and 63.2 in the CS and NS, respectively and the values decreased markedly especially, in the NS (35.3) after the restoration. The habitat disturbance was mainly attributed to destructions (i.e., the narrower width of riparian vegetation and higher substrate exposure by the air) of artificial materials by massive flood in 2009. Overall, our results suggest that the restoration was not effective in the two streams between the two periods, even if the budget was used a lot and that such ecological restoration, not considered the natural disaster, may not effect for the stream restoration.
Keywords
Ecological restoration; habitat health; QHEI; IBI; fish;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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