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http://dx.doi.org/10.7850/jkso.2011.16.1.027

Understanding of Phytoplankton Community Dynamics Through Algae Bioassay Experiment During Winter Season of Jinhae bay, Korea  

Hyun, Bong-Gil (Korea Ocean Research and Development Institute)
Shin, Kyoung-Soon (Korea Ocean Research and Development Institute)
Kim, Dong-Sun (Marine Environment Research Department, KORDI)
Kim, Young-Ok (Korea Ocean Research and Development Institute)
Joo, Hae-Mi (Korea Ocean Research and Development Institute)
Baek, Seung-Ho (Korea Ocean Research and Development Institute)
Publication Information
The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY / v.16, no.1, 2011 , pp. 27-38 More about this Journal
Abstract
The distributions of phytoplankton assemblages and environmental factors in Jinhae Bay and their relationships were investigated to estimate the potential limiting nutrient for phytoplankton growth and community structure. In situ algal bioassay experiments were also conducted to assess the species-specific characteristics in phytoplankton responses under different nutrient conditions (control, N(+) and P(+) treatment). During the study periods, bacillariophyceae and cryptophyceae occupied more than 90% of total phytoplankton assemblages. Phytoplankton standing crops in the inner part of Masan Bay were higher than that of Jinhae Bay. The DIN:DIP ratio, pH and transparency showed the significant positive correlation with phytoplankton biomass. According to cluster and multidimensiolnal scaling (MDS) analysis based on phytoplankton community data from each station, the bay was divided into three groups. The first group included stations from the south-western part of Jinhae bay where cryptophyta species were dominated. The second group was distinguished from inner stations in Masan Bay. These stations showed low transpancy and high DIN:DIP ratio. The other cluster included the stations from the eastern part and central part of Jinhae Bay, which was characterized by the high DSi:DIP ratio and dominant of diatom species. Phosphorous (P) was limited in Masan Bay due to significantly increases in the phytoplankton abundances. Based on stoichiometric limitation and algal bio-assay in Jinhae Bay, nitrogen (N) was a major limiting factor for phytoplankton production. However, silicate (Si) was not considered as limiting factor, since Si/DIN and Si/P ratio and absolute concentration of nutrient did not create any potential stoichiometric limitation in the bay. This implies that high Si availability in winter season contributes favorably to the maintenances of diatom species.
Keywords
phytoplankton community structure; algal bioassay experiments; potential limiting nutrient; multidimensional scaling (MDS); Jinhae Bay;
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Times Cited By KSCI : 7  (Citation Analysis)
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