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http://dx.doi.org/10.5762/KAIS.2020.21.7.1

Distributional characteristics of mesozooplankton community in Nakdong river estuary  

Kang, Jung-Hoon (Risk Assessment Research Center, Korea Institute of Science and Technology)
Kim, Minju (Risk Assessment Research Center, Korea Institute of Science and Technology)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.7, 2020 , pp. 1-11 More about this Journal
Abstract
This study investigated the mesozooplankton community and the related environmental factors in the Nakdong River Estuary in May and early October shortly after passage of the typhoon "DUJUAN" in 2015. The mesozooplankton community was dominated by barnacle nauplii, foraminiferans, and Noctiluca scintillans, and the environmental characteristics were characterized by freshwater inflow through the Nakdong River barrage, the intrusion of warm currents, and the effect of typhoon passage in October. In May, cladocerans, such as Evadne nordmanni and Podon polyphemoides, as indicator species of brackish water, prevailed throughout the study area. The surface salinity was lowest on the inner side of the barrier-islands and increased gradually to the outer side during the study. The average concentration of total suspended solids in October was higher than that in May, while the averaged concentration of nitrate and chlorophyll-a in May was higher than those in October. On the other hand, there was no temporal difference in the total averaged abundance of mesozooplankton. In contrast, the distributional pattern of the mesozooplankton community was associated with the salinity gradient in both seasons. These results suggest that the temporal difference of the mesozooplankton community depended on the extent of freshwater inflow by barrage opening, the intrusion intensity of warm currents, and typhoon passage in the Nakdong River estuary in 2015.
Keywords
Nakdong River Estuary; Barrage; Barrier-Islands; Typhoon; Mesozooplankton; Salinity;
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Times Cited By KSCI : 9  (Citation Analysis)
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