EXAMINATION OF SILICATE LIMITATION O

EXAMINATION OF SILICATE LIMITATION OF PRIMARY PRODUCTION IN JIAOZHOU BAY, CHINA Ⅰ. SILICATE BEING A LIMITING FACTOR OF P

Jiaozhou Bay data collected from May 1991 to February 1994, in 12 seasonal investigations, and provided the authors by the Ecological Station of Jiaozhou B ay, were analyzed to determine the spatiotemporal variations in temperature, light, nutrients (NO-3-N, NO-2-N, NH+4-N, SiO2-3-Si, PO3-4-P), phytoplankton, and primary production in Jiaozhou Bay. The results indicated that only silicate correlated well in time and space with, and had important effects on, the characteristics, dynamic cycles and trends of, primary production in Jiaozhou Bay. The authors developed a corresponding dynamic model of primary production and silicate and water temperature. Eq.(1) of the model shows that the primary production variation is controlled by the nutrient Si and affected by water temp erature; that the main factor controlling the primary production is Si; that water temper ature affects the composition of the structure of phytoplankton assemblage; that the different populations of the phytoplankton assemblage occupy different ecologica l niches for C, the apparent ratio of conversion of silicate in seawater into phytoplankton biomas and D, the coefficient of water temperature's effect on phytoplankton biomass. The authors researched the silicon source of Jiaozhou Bay , the biogeochemical sediment process of the silicon, the phytoplankton predominan t species and the phytoplankton structure. The authors considered silicate a limit ing factor of primary production in Jiaozhou Bay, whose decreasing concentration of silicate from terrestrial source is supposedly due to dilution by current and up take by phytoplankton; quantified the silicate assimilated by phytoplankton, the intrins ic ratio of conversion of silicon into phytoplankton biomass, the proportion of silicate uptaken by phytoplankton and diluted by current; and found that the primary production of the phytoplankton is determined by the quantity of the silicate assimilated by them. The phenomenon of apparently high plant-nutrient concentrations but low phytoplankton biomass in some waters is reasonably explained in this paper.

作 者： 杨东方 张经 吕吉斌 高振会 陈豫   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 Ad)

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)

吕吉斌(Key Laboratory of Science and Engineering for Marine Ecological Environment,State Oceanic Administration, Qingdao 266061, China)

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

陈豫(College of Computer Science, Shanghai Fisheries University, Shanghai 200090, 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)： 2002 20(3)  分类号： P7  关键词： phytoplankton   silicon   limiting factor   Jiaozhou Bay  

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