Examination of Silicate Limitation o

Examination of Silicate Limitation of Primary Production in Jiaozhou Bay, North China Ⅲ.Judgment Method, Rules and Uniqu

Analysis and comparison of Jiaozhou Bay data collected from May 1991 to February 1994(12 seasonal investigations) provided bythe 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.icate, 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.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.

作 者： 杨东方 高振会 陈豫 张经 王培刚   作者单位： 杨东方(College of Fishery Science, Shanghai Fisheries University, Shanghai 200090, China; Beihai Monitoring Center of State Oceanic Administration, Qingdao 266033, China; Key Laboratory of Science and Engineering for Marine Ecological Environment, State Oceanic)

高振会,王培刚(Beihai Monitoring Center of State Oceanic Administration, Qingdao 266033, China)

陈豫(College of Computer Science, Shanghai Fisheries University, Shanghai 200090, China)

张经(College of Chemistry and Chemical Engineering, Ocean University of Qingdao, Qingdao 266003, China;State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China) 

刊 名： 中国海洋湖沼学报(英文版)  ISTIC SCI 英文刊名： CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY  年，卷(期)： 2003 21(2)  分类号： P7  关键词： phytoplankton   silicate   limiting factor   Jiaozhou Bay  

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