SHEN Zhiliang, YAO Yun, WU Yulin. Silica supply and diatom blooms in the Jiaozhou Bay, China[J]. Acta Oceanologica Sinica, 2016, 35(10): 20-27. doi: 10.1007/s13131-016-0917-7
Citation: SHEN Zhiliang, YAO Yun, WU Yulin. Silica supply and diatom blooms in the Jiaozhou Bay, China[J]. Acta Oceanologica Sinica, 2016, 35(10): 20-27. doi: 10.1007/s13131-016-0917-7

Silica supply and diatom blooms in the Jiaozhou Bay, China

doi: 10.1007/s13131-016-0917-7
  • Received Date: 2015-12-30
  • Rev Recd Date: 2016-07-07
  • The variations in nutrients (molar ratios) and chlorophyll a in the Jiaozhou Bay were examined before and after a diatom bloom in a period that lasted from November 2003 to March 2004. Negative relationships between nutrient concentrations, Si/P, Si/N ratios and chlorophyll a content were found during the bloom, which reflected the relationship between nutrient concentrations, phytoplankton biomass and growth. Large increase in nutrient concentrations, particularly SiO3-Si after the late autumn, is one of major reasons inducing the diatom bloom in winter, and the bloom was finally controlled due to SiO3-Si depletion by phytoplankton. The bloom was mainly controlled by SiO3-Si. Before 1998, relatively low level of SiO3-Si kept ecological balance of eutrophication waters in the Jiaozhou Bay. In recent years, however, human activities have increased SiO3-Si concentration, which is likely one of the primary cause for the increased diatom blooms in the Jiaozhou Bay. Therefore, it is necessary to control SiO3-Si concentration in the Jiaozhou Bay.
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