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Circulation, biogeochemistry and carbon cycling in ocean margins
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Temporal and spatial patterns of phytoplankton: comparison between the East China Sea and the South China Sea
P-M1-11
Xin Liu* , State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
Wupeng Xiao, State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
Bangqin Huang, State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
Presenter Email: liuxin1983@xmu.edu.cn |
| Phytoplankton are the primary producers of marine ecosystems and respond to global changes. Compared with open oceans, the temporal and spatial patterns of phytoplankton in marginal seas are complex and changeable, which leads to a series of complex biogeochemical processes in marginal seas. The East China Sea and the South China Sea are one of the most important marginal seas in the Northwest Pacific Ocean. They are both affected by the Kuroshio and the river plume water from the mainland China. However, they are also found to have distinct seasonal variations in phytoplankton. Under the control of the East Asian monsoon system, the concentration of chlorophyll a in the East China Sea is higher in spring/summer and lower in winter, but these are opposite to the South China Sea. In this study, the spatial and temporal variations of chlorophyll a, primary productivity, growth rate and community structure of phytoplankton in the East China Sea and the South China Sea were studied by using field observation and satellites remote sensing data. The results showed that there were significant differences in the seasonal variation of phytoplankton biomass, growth rate, ingested mortality and other parameters between the two systems, indicating the differences in the mechanisms of bottom-up and top-down controls, which eventually led to the differences in temporal and spatial patterns of phytoplankton between the two ecosystems. |
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