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We analyzed fish community dynamics in fishways in the Yeongsan, Nakdong, and Geum river watersheds in South Korea and evaluated fish passage efficiency using a multimetric fishway assessment model, along with analyses of water chemistry and flow regime, from April to October 2016. The dominant fish in the fishways was Erythroculter erythropterus, with a mean relative abundance of 28.5% in all three...
The objectives of this study were to determine the long-term changes in water chemistry, physical habitat, and fish fauna/composition before and after construction of the Sejong Weir in Geum River, South Korea, during 2007–2014, and to evaluate the integrated ecological health based on chemical water quality, physical habitat, and biotic integrity using a star plot integration approach. As an indicator...
Deteriorating water quality has become a global concern. Chungju Reservoir is the largest reservoir in South Korea. Here we describe the long-term spatiotemporal variabilities and prevailing trends in physicochemical and nutrient contributing factors using datasets of 1992-2016. Seasonal, annual, multivariate analytical techniques, and water pollution index (WPI) investigations revealed monsoon rainfall...
This study evaluates integrative lotic ecosystem health using neural network modeling and principal component analysis of physical, chemical, and biological parameters in 33 streams and rivers of a large watershed. Water chemistry parameters were measured to detect chemical health, and physical habitat health was determined by a model of qualitative habitat evaluation index (QHEI). Also, biological...
The principal aim of this study was to evaluate how nutrient regime and TN:TP ratios regulate algal chlorophyll in Korean agricultural reservoirs. We developed empirical models of log-transformed CHL-TN:TP ratio based on seasonality. Winter algal chlorophyll was highly influenced by the ratio of TN:TP (R² = 0.78, p<0.01) compared to chlorophyll-a in the spring (R² = 0.38, p<0.01), summer (R²...
Length‐weight relations (LWR) of six fish species from Geum, Nakdong and Yeongsan rivers in South Korea was estimated. A total of 5,152 specimens were measured and weighed. The linear relationship of total length and total weight were highly correlated for all species. No previous information on LWRs on Rhinogobius brunneus species were found in Fishbase.
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