| Examination of Silicate Limitation of Primary Production in Jiaozhou Bay,North China：Ⅲ.Judgment Method ,Rules and Uniqueness of Nutrient Limitation Among N,P,and Si |
| |
| 摘 要： |
|
| 关 键 词： | 硅酸盐 胶州湾 浮游植物 硅藻 氮 磷 生态系统 时空分布 硅 初级生产力 |
| 收稿时间： | 25 December 2001 |
| 修稿时间： | 10 October 2002 |
Examination of silicate limitation of primary production in Jiaozhou Bay,North China |
| |
| Authors: | Yang Dongfang Gao Zhenhui Chen Yu Zhang Jing Wang Peigang |
| |
| Institution: | (1) College of Fishery Science, Shanghai Fisheries University, 200090 Shanghai, China;(2) Beihai Monitoring Center of State Oceanic Administration, 266033 Qingdao, China;(3) Key Laboratory of Science and Engineering for Marine Ecological Environment, State Oceanic Administration, 266061 Qingdao, China;(4) College of Chemistry and Chemical Engineering, Ocean University of Qingdao, 266003 Qingdao, China;(5) State Key Laboratory of Estuarine and Coastal Research, East Chine Normal University, 200062 Shanghai, China;(6) College of Computer Science, Shanghai Fisheries University, 200090 Shanghai, China |
| |
| Abstract: | 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.
This study was funded by the NSFC (No. 40036010) and subsidized by Special Funds from the National Key Basic Research Program
of P. R. China (G199990437), the Postdoctoral Foundation of Ocean University of Qingdao, the Director's Foundation of the
Beihai Monitoring Center of the State Oceanic Administration and the Foundation of Shanghai Fisheries University. |
| |
| Keywords: | phytoplankton silicate limiting factor Jiaozhou Bay |
| 本文献已被 SpringerLink 等数据库收录！ |
|
