Internal wave impacts on the diel patterns of picophytoplankton in the South China Sea
Date Issued
2014
Date
2014
Author(s)
Fu, Wei-Kun
Abstract
The South China Sea (SCS) is famous for its internal waves (IWs). To explore its impacts on the diel distribution patterns of picophytoplankton, including Synechococcus , Prochlorococcus and Picoeukaryotes, a total of seven anchored studies were conducted during the period of 2012~2013 in the SCS areas with different physical conditions. These are areas subjected to elevation IWs (4 sites), depression IWs (1 site) and weak or no IWs (2 sites). The latter two areas serve as the control sites. Results indicated that Synechococcus and Picoeukaryotes showed higher abundance in elevation IWs sites (19.92 ×103 and 3.76 ×103 cells ml-1, respectively) than in depression and no IWs sites (4.05 ×103 and 1.53 ×103 cells ml-1, respectively). The depth-integrated averaged abundance values of Synechococcus and Picoeukaryotes increased 5- and 2.5-fold higher than control sites, respectively. Prochlorococcus showed a contrast pattern with much lower abundance in the elevation IWs sites. Our moored buoy data indicated that the IWs occurred mostly during the flood-tide period. Synechococcus and Picoeukaryotes abundance showed similar pattern with the tide cycle, suggesting that the limiting inorganic nutrients brought up to the upper-water column by the elevation IWs might have stimulated the growth of Synechococcus and Picoeukaryotes.
Subjects
南海內波
超微浮游生物
東沙環礁
營養鹽
南中國海時間序列站
Type
thesis
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