摘要
于2011年12月—2012年1月对我国东海、黄海表层及不同深度海水中c（DMSOd）（DMSOd为溶解态二甲亚砜）和c（DMSOp）（DMSOp为颗粒态二甲亚砜）的分布进行了研究,并探讨了其来源及影响因素.结果表明：表层海水中c（DMSOd）和c（DMSOp）分别为（10.10±7.54）和（8.72±7.80）nmolL,其水平分布明显受调查海域中浮游植物组成和丰度的影响;垂直分布上,c（DMSOd）和c（DMSOp）的最大值均出现在浅水层（3-20 m）.相关分析表明,c（DMSOd）与c（DMS）（DMS为二甲基硫）之间没有相关性,但与c（DMSOp）显著相关（R=0.442,n=41,P〈0.006）,说明冬季表层海水中DMSOd主要来源于浮游植物细胞内DMSO的释放,而不是DMS的氧化（光化学氧化和微生物氧化）.另外,c（DMSOp）ρ（Chla）与盐度呈正相关（R=0.532,n=46,P〈0.004）,说明盐度的改变会影响浮游植物组成的变化,进而影响c（DMSOp）.
Distributions of dissolved and particulate dimethylsulfoxide（ DMSOd and DMSOp） were studied in the surface waters at different depths in the East China Sea and the Yellow Sea from December 2011 to January 2012,to explore their sources and influencing factors. The concentrations of DMSOd and DMSOp in the surface waters were（ 10. 10 ± 7. 54） and（ 8. 72 ± 7. 80） nmolL,respectively,which were clearly affected by phytoplanktons and abundance in the area. The vertical profiles of DMSOd and DMSOp were characterized by high concentrations in the upper mixed layer（ 3-20 m）. No relationship was found between DMSOd and DMS,whereas a significant correlation was observed between DMSOd and DMSOp（ R = 0. 442,n = 41,P 〈0. 006）. The result suggested that DMSOd mainly originated from the diffusion of intracellular DMSOp,rather than from the oxidation of DMS（ photochemical and biological oxidation）. In addition,the positive linear correlation between DMSOpChla and salinity（ R = 0. 532,n = 46,P〈 0. 004） indicated that changes of salinity might influence the phytoplankton taxonomic composition and thus DMSOp concentration.
出处
《环境科学研究》
EI
CAS
CSSCI
CSCD
北大核心
2014年第10期1119-1125,共7页
Research of Environmental Sciences
基金
国家自然科学基金项目(41030858
41320104008
41306069)
关键词
二甲亚砜
分布
东海
黄海
dimethylsulfoxide
distribution
East China Sea
Yellow Sea
作者简介
王鑫（1984-）。女，河南周口人，wangxinjiangnan@163．com
责任作者，杨桂朋（1963-），男，山东诸城人，教授，博士，博导，主要从事海洋生源活性气体的生物地球化学、海洋界面化学研究，gpyang@mail．ouc．edu．cn
