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Acta Botanica Sinica
Botanical Society of China and Institute of Botany, the Chinese Academy of Sciences
ISSN: 0577-7496
Vol. 45, No. 7, 2003, pp. 774-786
Bioline Code: as03005
Full paper language: English
Document type: Research Article
Document available free of charge

Acta Botanica Sinica, Vol. 45, No. 7, 2003, pp. 774-786

 en Dynamics of Dimethylsulfide and Dimethylsulfoniopropionate Produced by Phytoplankton in the Chinese Seas - Distribution Patterns and Affecting Factors
JIAO Nian-Zhi1, LIU Cheng-Zheng, HONG Hua-Sheng, Shigeki HARADA, Horoshi KOSHIKAWA, Masataka WATANABE

Abstract

Distribution of dimethylsulfide (DMS) and/or particulate dimethylsulfoniopropionate (DMSPp) concentrations in the Jiaozhou Bay, Zhifu Bay and East China Sea wereinvestigated during the period of 1994 - 1998. Both DMS and DMSPp levels showed remarkable temporal and spatial variations. High values occurred in the coastal or shelf waters and low values in the offshore waters. The highest levels were observed in spring or summer and lowest in autumn. DMS or DMSPp distribution patterns were associated with water mass on a large geographical scale, while biological and chemical factors were more likely influential on smaller-scale variations. Diatoms could play an important role in total DMS or DMSPp abundance in coastal waters. Nitrate was found to have a two-phase relationship with DMSPp concentrations: positive when nitrate concentration was lower than 1 μmol/L, and negative when it was above. Anthropogenic factors such as sewage input and aquaculture also showed influences on DMS or DMSPp concentration.

Keywords
dimethylsulfide (DMS); particulate dimethylsulfoniopropionate (DMSPp); nitrogen; diatoms; Chinese seas

 
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