Examination of silicate limitation of primary production in Jiaozhou Bay, China

Yang Dongfang; Zhang Jing; Gao Zhenhui; Chen Yu; Sun Peiyan

doi:10.1007/BF02842761

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Examination of silicate limitation of primary production in Jiaozhou Bay, China

OriginalPaper | Updated：2023-05-16

- Examination of silicate limitation of primary production in Jiaozhou Bay, China
- Examination of silicate limitation of primary production in Jiaozhou Bay, China
- 海洋湖沼学报（英文） 2003年21卷第1期页码：46-63
- Affiliations：
  
  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. State Key Laboratory of Estuarine and Coastal Research East China Normal University
  5. College of Chemistry and Chemical Engineering Ocean University of Qingdao
  6. College of Computer Science Shanghai Fisheries University
- Author bio：
- Funds：
  
  This study was funded by NSFC (No. 40036010) and subsidized by Special Funds from National Key Basic Research Program of P. R. China (G19990437), 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.
- DOI：10.1007/BF02842761
  中图分类号：
- 纸质出版：2003
- Accepted：
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Examination of silicate limitation of primary production in Jiaozhou Bay, China[J]. 海洋湖沼学报（英文）, 2003,21(1):46-63.

Dongfang, Y., Jing, Z., Zhenhui, G. et al. Examination of silicate limitation of primary production in Jiaozhou Bay, China., Chin. J. Ocean. Limnol. 21, 46–63 (2003). https://doi.org/10.1007/BF02842761
Examination of silicate limitation of primary production in Jiaozhou Bay, China[J]. 海洋湖沼学报（英文）, 2003,21(1):46-63. DOI： 10.1007/BF02842761.

Dongfang, Y., Jing, Z., Zhenhui, G. et al. Examination of silicate limitation of primary production in Jiaozhou Bay, China., Chin. J. Ocean. Limnol. 21, 46–63 (2003). https://doi.org/10.1007/BF02842761 DOI：

摘要

Abstract

Analysis and comparison of Jiaozhou Bay data collected from May 1991 to February 1994 revealed the spatiotemporal variations of the ambient Si(OH)4:NO3 (Si:N) concentration rations and the seasonal variations of (Si:N) ratios in Jiaozhou Bay and showed that the Si:N ratios were <1 throughout Jiaozhou Bay in spring

autumn

and winter. These results provide further evidence that silicate limits the growth of phytoplankton (i.e. diatoms) in spring

autumn and winter. Moreover

comparison of the spatiotemporal variations of the Si:N ratio and primary production in Jiaozhou Bay suggested their close relationship. The spatiotemporal pattern of dissolved silicate matched well that of primary production in Jiaozhou Bay. Along with the environmental change of Jiaozhou Bay in the last thirty years

the N and P concentrations tended to rise

whereas Si concentration showed cyclic seasonal variations. With the variation of nutrient Si limiting the primary production in mind

the authors found that the range of values of primary production is divided into three parts: the basic value of Si limited primary production

the extent of Si limited primary production and the critical value of Si limited primary production

which can be calculated for Jiaozhou Bay by Equations (1)

(2) and (3)

showing that the time of the critical value of Si limitation of phytoplankton growth in Jiaozhou Bay is around November 3 to November 13 in autumn; and that the time of the critical value of Si satisfaction of phytoplankton growth in Jiaozhou Bay is around May 22 to June 7 in spring. Moreover

the calculated critical value of Si satisfactory for phytoplankton growth is 2.15–0.76 μmol/L and the critical value of Si limitation of phytoplankton growth is 1.42–0.36 μmol/L; so that the time period of Si limitation of phytoplankton growth is around November 13 to May 22 in the next year; the time period of Si satisfactory for phytoplankton growth is around June 7 to November 3. This result also explains why critical values of nutrient silicon affect phytoplankton growth in spring and autumn are different in different waters of Jiaozhou Bay and also indicates how the silicate concentration affects the phytoplankton assemblage structure. The dilution of silicate concentration by seawater exchange affects the growth of phytoplankton so that the primary production of phytoplankton declines outside Jiaozhou Bay earlier than inside Jiaozhou Bay by one and half months. This study showed that Jiaozhou Bay phytoplankton badly need silicon and respond very sensitively and rapidly to the variation of silicon.

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references

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