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Freshwater Fish Fauna and Ecological Health Assessment of the Agricultural Reservoirs in Jecheon City, Korea

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2018, 27(3), pp.307-321
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering

JEONGHO HAN 1 KimJaeHwan 1 LeeSangBo 1 Paek Woon Kee ORD ID 1

1국립중앙과학관

Accredited

ABSTRACT

Fish fauna and lentic ecosystem health assessment in freshwater were analyzed in the two reservoirs (Uirim Reservoir (Ur) and Solbangjuk Reservoir (Sr)) of the Jecheon City during May- September 2017. Total numbers of the species and genus (7 family) sampled were 21 and 16, respectively. Cyprinidae was most dominant taxa, which accounted for 11 species (52.4%) of the total species, and the relative abundance, based on the number of individuals, was 318 individuals (46.2%). Subdominant families were taxa of Centrachidae (2 species; 264 ind. (38.4%). The dominant species, based on the relative abundance, were Squalidus chankaensis tsuchigae (22.7%). Subdominant species were Lepomis macrochirus (19.5%, 134 ind.) and Micropterus salmoides (18.9%, 134 ind.). Trophic state index of Korea (TSIKO), based on chemical oxygen demand (COD), total phosphorus (TP) and chlorophyll-a (CHL), ranged mesotrophic state. The purpose of this study was to apply a multi-metric model of Lentic Ecosystem Health Assessments (LEHA) for environmental impact assessments of two reservoirs and assessed the ecological health model values. Trophic composition’s metrics showed that tolerant species (56.8%, 98.3%) and omnivore species (43.9%, 65.6%) dominated the fish fauna in the two reservoirs (Ur and Sr) of Jecheon City, indicating a biological degradation in the aquatic ecosystem. The relative proportions of Micropterus salmoides, also showed greater than 16.3% (Ur), 31.1% (Sr) of the total, indicating a ecological disturbance. The average value of LEHA model was 22 (Ur) and 12 (Sr) in the reservoirs, indicating a “poor condition (Ur)” and “very poor condition (Sr)” by the criteria of MOE (2014).

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