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Correlations and Seasonal Variations of Marine Viral Abundances, Bacterial Abundances and Concentration of Chlorophyll-$\alpha$ in Gwangyang Bay  

Choi, Eun-Seok (South Sea Institute, KORDI)
Kim, So-Jung (South Sea Institute, KORDI)
Oh, Ro-Ra (South Sea Institute, KORDI)
Yun, Hee-Young (South Sea Institute, KORDI)
Shin, Kyung-Soon (South Sea Institute, KORDI)
Chang, Man (South Sea Institute, KORDI)
Lee, Sukchan (Department of Genetic Engineering, Sungkyunkwan University)
Lee, Sang-Seob (Department of Biology, Kyonggi University)
Lee. Taek-Kyun (South Sea Institute, KORDI)
Publication Information
Korean Journal of Environmental Biology / v.22, no., 2004 , pp. 86-92 More about this Journal
Abstract
The marine viral density in the Gwangyang Bay was abundant about 2.0${\times}$10$^{8}$ particles ml$^{-1}$ . For each season, viral abundances were recorded from 9.0${\times}$10$^{8}$ particles ml$^{-1}$ in summer to 0.7${\times}$10$^{6}$ particles ml$^{-1}$ in winter. The spatial distributions of the viral, bacterial and phytoplankton biomass in the Gwangyang Bay were mostly highey in closed estuarine system (Station 2, 5, 10, 12, 16, 20) than open ocean system (Station 28, 38, 42, 46, 51), And the othey closed estuarine system (Station 22, 26, 32, 34) indicated higher viral abundances, lower bacterial and plankton biomass than open oceanic system. In depths of some stations, the bacterial abundances exceeded a hundred fold than viral abundances. Seasonal abundances of marine viruses and their host systems were dynamically changed, and their seasonal variations were closely correlated. In summer, viral and bacterial abundances were increased, and phytoplankton chlorophyll $\alpha$ concentrations were maintained in average values. In winter, viral and bacterial abundances were dramatically decreased, and chlorophyll a concentrations were decreased, but, immediately increased. The viral abundances were peaked in August 2001, and bacteyial abundance, in August 2001 and June 2002, while chlorophyll a concentrations were peaked in April. 2002. In total host and viral abundances, it was seemed that their pools were maintained to steady-states by viral mortality, and viral abundance maintained steady-states. In our assessments, this report is a unique research about marine viral ecology of the Gwangyang Bay in Korea.
Keywords
viruses; bacteria; chlorophyll a; epifiuorescence microscopy; SYBR Gold; Gwangyang Bay;
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