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Influence of Zooplankton and Environmental Factors on Clear-Water Phase in Lake Paldang, South Korea

Author

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  • Younbo Sim

    (Han River Environment Research Center, National Institute of Environmental Research, 42, Dumulmeori-gil 68beon-gil, Yangseo-myeon, Yangpyeong-gun 12585, Korea
    Department of Environmental Health Science, Konkuk University, Seoul 05029, Korea)

  • Myeong Seop Byeon

    (Han River Environment Research Center, National Institute of Environmental Research, 42, Dumulmeori-gil 68beon-gil, Yangseo-myeon, Yangpyeong-gun 12585, Korea)

  • Keonhee Kim

    (Human and Eco-Care Center, Department of Environmental Health Science, Konkuk University, Seoul 05029, Korea)

  • Soon Ju Yu

    (Han River Environment Research Center, National Institute of Environmental Research, 42, Dumulmeori-gil 68beon-gil, Yangseo-myeon, Yangpyeong-gun 12585, Korea)

  • Jong Kwon Im

    (Han River Environment Research Center, National Institute of Environmental Research, 42, Dumulmeori-gil 68beon-gil, Yangseo-myeon, Yangpyeong-gun 12585, Korea)

Abstract

Lake Paldang is a complex water system with both fluvial and lacustrine characteristics and the largest artificial dam lake in South Korea. In this study, the different occurrence patterns and causes of the clear-water phase (CWP) were investigated using water quality and hydrological factors at four sites in Lake Paldang. Among the environmental and other factors associated with CWP occurrence, secchi depth and turbidity exhibited significant correlations with precipitation, hydraulic retention time (HRT), and individual and relative abundance (RA) of zooplankton (Cladocera) ( p < 0.01). Hence, a change in the HRT because of precipitation could alter the CWP. The Cladocera individuals and RA showed significant correlations with the water temperature, indicating that the emergence of Cladocera in spring as the water temperature rises could cause the CWP. Sensitivity assessments conducted using Bayesian models demonstrated different CWP occurrence sensitivity relationships for the river-type, lake-type, and shallow and deep sites. Turbidity, secchi depth, and zooplankton factors also showed sensitive relationships with CWP occurrence for all sites. The sensitivity to precipitation and HRT was higher in the river-type sites. The lake-type sites, with common Cladocera emergence and long HRT, favored CWP occurrence. Thus, CWP occurrence was dependent on the site characteristics and climate conditions.

Suggested Citation

  • Younbo Sim & Myeong Seop Byeon & Keonhee Kim & Soon Ju Yu & Jong Kwon Im, 2021. "Influence of Zooplankton and Environmental Factors on Clear-Water Phase in Lake Paldang, South Korea," IJERPH, MDPI, vol. 18(13), pages 1-15, July.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:13:p:7205-:d:588958
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    1. Łukasz Sługocki & Robert Czerniawski & Monika Kowalska-Góralska & Magdalena Senze & Anabela Reis & João S. Carrola & Carlos A. Teixeira, 2018. "The Impact of Land Use Transformations on Zooplankton Communities in a Small Mountain River (The Corgo River, Northern Portugal)," IJERPH, MDPI, vol. 16(1), pages 1-17, December.
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