| SHEN Zhiliang,YAO Yun,WU Yulin. 2016. Silica supply and diatom blooms in the Jiaozhou Bay, China. Acta Oceanologica Sinica, 35(10):20－27 |
| Silica supply and diatom blooms in the Jiaozhou Bay, China |
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| Received:December 30, 2015 Revised:July 07, 2016 |
| DOI：10.1007/s13131-016-0917-7 |
| Key words:nutrient phytoplankton chlorophyll a blooms Si supply Jiaozhou Bay |
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| Author Name | Affiliation | E-mail | | SHEN Zhiliang | Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China | zhlshen@qdio.ac.cn | | YAO Yun | Research Center for the Computer and Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China | | | WU Yulin | Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China | |
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| 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. |
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