Distribution pattern of zooplankton in the han river estuary with respect to tidal cycle |
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| Authors: | Seok-Hyun Youn Joong-Ki Choi |
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| Institution: | (1) Environment Research Division, East Sea Fisheries Research Institute, NFRDI, 210-861 Gangneung, Korea;(2) Department of Oceanography, Inha University, 402-751 Incheon, Korea |
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| Abstract: | The monthly distribution of zooplankton communities in Han River estuary was investigated at two stations from July 1998 to
June 1999. Monthly mean abundance of total zooplankton varied remarkably, with the range from 20 indiv.·m-3 to 19,600 indiv.·m-3. During the study period, dominant species of zooplankton community were dinoflagellateNoctiluca scintillans, copepodsParacalanus indicus, Paracaanus crassirostris, Acartia hongi, Acartia ohtsukai, and meroplanton cirriped larvae. According to tidal states, relative high abundance occurred at high tide without regard
to season. The temporal distribution of abundance implied that the reduced salinity probably limited the zooplankton populations
and the fluctuations of salinity were an important factor in the variation of abundance. However, the results of salinity
tolerance test shows that the variations in salinity do not directly influence the decrease of abundance. This study shows
that the relatively high abundance of zooplankton near high tide seems to be related with the expansion of abundant zooplankton
inhabiting Incheon coastal waters through tidal currents. |
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| Keywords: | zooplankton Han River estuary tidal cycle salinity |
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