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Distribution of phytoplankton in the East China Sea and the southern Yellow Sea in spring in relation to environmental variables and dimethylsulfide compounds

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Acta Oceanologica Sinica 2022年第6期41卷 41-53页

作者： Jiawei Zhang Yanghang Chen Xueyan Ren Vishal Patil Lin Sun Xuesong Li Junrong Liang Jun Zhang Yahui Gao Changping Chen School of Life Sciences Xiamen UniversityXiamen 361102China Key Laboratory of the Coastal and Wetland Ecosystems of Ministry of Education Xiamen UniversityXiamen 361102China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361102China Laboratory of Marine Biology and Ecology Third Institute of OceanographyState Oceanic AdministrationXiamen 361005China Eco-Environmental Monitoring and Research Center Pearl River Valley and South China Sea Ecology and Environment AdministrationMinistry of Ecology and EnvironmentGuangzhou 510610China

The coastal ecosystems are highly sensitive to climate change and are usually influenced by variations in phytoplankton communities and water physiochemical factors.In the present study,the phytoplankton community,chlorophyll a(Chl a)and their relationships with environmental variables and dimethylsulfide(DMS)and dimethylsulfoniopropionate(DMSP)were investigated in spring 2017(March 24 to April 16)in the East China Sea(26.0°-33.0°N,120.0°-128.0°E)and southern Yellow Sea(31.0°-36.0°N,120.0°-125.0°E).The spatial distributions of phytoplankton species composition and cell density were investigated by qualitative and quantitative methods and were compared with historical data to study phytoplankton species succession in the survey area.The results showed that there were 275 phytoplankton species belonging to 90 genera and 6 phyla in the survey area,of which 208 species belonged to 62 genera of Bacillariophyta and 56 species belonged to 20 genera of Pyrrophyta.The dominant phytoplankton species were Skeletonema dohrnii,Chaetoceros vanheurckii and Prorocentrum donghaiense.The phytoplankton cell densities ranged from 0.06×10^(4)cells/L to 418.73×10^(4)cells/L,with an average value of 21.46×10^(4)cells/L.In spring,the average ratio of Bacillariophyta/Pyrrophyta was41.13 for the entire study area.The areas with high phytoplankton cell density were mainly distributed in the northern South Yellow Sea and offshore waters of the East China Sea.According to a canonical correspondence analysis among phytoplankton and environmental parameters,the water Chl a concentrations were notably consistent with phytoplankton cell density(P<0.001),and both showed significant negative correlations with salinity and nitrite(P<0.05)and significant positive correlations with dissolved oxygen and pH(P<0.001).There was a significant positive correlation between diatom(both in cell density and in dominant species)and DMS(P<0.05),which indicated that diatoms play a greater role in DMS production in this investigated area.

关键词： phytoplankton distribution East China Sea southern Yellow Sea dimethylsulfoniopropionate

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Biogenic production of DMSP and its degradation to DMS—their roles in the global sulfur cycle

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Science China(Life Sciences) 2019年第10期62卷 1296-1319页

作者： Xiao-Hua Zhang Ji Liu Jingli Liu Guipeng Yang Chun-Xu Xue Andrew R. J. Curson Jonathan D. Todd MOE Key Laboratory of Marine Genetics and Breeding College of Marine Life SciencesOcean University of ChinaQingdao 266003China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266071China School of Biological Sciences University of East AngliaNorwich NR4 7TJUK

Dimethyl sulfide(DMS) is the most abundant form of volatile sulfur in Earth’s oceans, and is mainly produced by the enzymatic clevage of dimethylsulfoniopropionate(DMSP). DMS and DMSP play important roles in driving the global sulfur cycle and may affect climate. DMSP is proposed to serve as an osmolyte, a grazing deterrent, a signaling molecule, an antioxidant, a cryoprotectant and/or as a sink for excess sulfur. It was long believed that only marine eukaryotes such as phytoplankton produce DMSP. However, we recently discovered that marine heterotrophic bacteria can also produce DMSP, making them a potentially important source of DMSP. At present, one prokaryotic and two eukaryotic DMSP synthesis enzymes have been identified.Marine heterotrophic bacteria are likely the major degraders of DMSP, using two known pathways: demethylation and cleavage.Many phytoplankton and some fungi can also cleave DMSP. So far seven different prokaryotic and one eukaryotic DMSP lyases have been identified. This review describes the global distribution pattern of DMSP and DMS, the known genes for biosynthesis and cleavage of DMSP, and the physiological and ecological functions of these important organosulfur molecules, which will improve understanding of the mechanisms of DMSP and DMS production and their roles in the environment.

关键词： marine microorganism dimethylsulfoniopropionate (DMSP) dimethyl sulfide (DMS) DMSP biosynthesis DMSP cleavage

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STUDY ON THE DIMETHYLSULFIDE AND DIMETHYLSULFONI-OPROPIONATE IN ALGAE BY LABORATORY BATCH CULTURES

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Chinese Journal of Oceanology and Limnology 1999年第4期17卷 366-370,359页

作者：张曼平崔贞崔伟王芳张慧珍盛平

The effects of selected environmental variables on the production of dimethylsulfide (DMS) and dimethylsulfoniopropionate (DMSP) by laboratory batch cultures of microalgae were studied. The variations of DMS and DMSP ... 详细信息

关键词： dimethylsulfide dimethylsulfoniopropionate microalgae batch cultures

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