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1. College of Fishery Science Shanghai Fisheries University
2. Beihai Monitoring Center of State Oceanic Administration
3. Key Laboratory of Science and Engineering for Marine Ecological Environment State Oceanic Administration
4. College of Computer Science Shanghai Fisheries University
5. College of Chemistry and Chemical Engineering Ocean University of Qingdao
6. State Key Laboratory of Estuarine and Coastal Research East Chine Normal University
Published:2003
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Dongfang, Y., Zhenhui, G., Yu, C. et al. Examination of silicate limitation of primary production in Jiaozhou Bay, North China., Chin. J. Ocean. Limnol. 21, 114–133 (2003). https://doi.org/10.1007/BF02843142
Analysis and comparison of Jiaozhou Bay data collected from May 1991 to February 1994 (12 seasonal investigations) provided by the Ecological Station of Jiaozhou Bay revealed the characteristic spatiotemporal variation of the ambient concentration Si∶DIN and Si∶16P ratios and the seasonal variation of Jiaozhou Bay Si∶DIN and Si∶16P ratios showing that the Si∶DIN ratios were <1 throughout the year in Jiaozhou Bay; and that the Si∶16P ratios were <1 throughout Jiaozhou Bay in spring
autumn and winter. The results proved that silicate limited phytoplankton growth in spring
autumn and winter in Jiaozhou Bay. Analysis of the Si∶DIN and Si∶P ratios showed that the nutrient Si has been limiting the growth of phytoplankton throughout the year in some Jiaozhou Bay waters; and that the silicate deficiency changed the phytoplankton assemblage structure. Analysis of discontinuous 1962 to 1998 nutrient data showed that there was no N or P limitation of phytoplankton growth in that period. The authors consider that the annual cyclic change of silicate limits phytoplankton growth in spring
autumn and winter every year in Jiaozhou Bay; and that in many Jiaozhou Bay waters where the phytoplankton as the predominant species need a great amount of silicate
analysis of the nutrients N or P limitation of phytoplankton growth relying only on the N and P nutrients and DIN∶P ratio could yield inaccurate conclusions. The results obtained by applying the rules of absolute and relative limitation fully support this view. The authors consider that the main function of nutrient silicon is to regulate and control the mechanism of the phytoplankton growth process in the ecological system in estuaries
bays and the sea. The authors consider that according to the evolution theory of Darwin
continuous environmental pressure gradually changes the phytoplankton assemblage's structure and the physiology of diatoms. Diatoms requiring a great deal of silicon either constantly decrease or reduce their requirement for silicon. This will cause a series of huge changes in the ecosystem so that the whole ecosystem requires continuous renewal
change and balancing. Human beings have to reduce marine pollution and enhance the capacity of continental sources to transport silicon to sustain the continuity and stability in the marine ecosystem.
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