Silica supply and diatom blooms in the Jiaozhou Bay, China

SHEN Zhiliang; YAO Yun; WU Yulin

doi:10.1007/s13131-016-0917-7

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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

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

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Silica supply and diatom blooms in the Jiaozhou Bay, China

doi: 10.1007/s13131-016-0917-7

1.
Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2.
Research Center for the Computer and Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

Received Date: 2015-12-30
Rev Recd Date: 2016-07-07

Abstract

Abstract

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.
- nutrient,
- phytoplankton,
- chlorophyll a,
- blooms,
- Si supply,
- Jiaozhou Bay

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References(42)

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