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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).
From December 2011 to January 2012, c (DMSOd) (DMSOd is dissolved dimethylsulfoxide) and c (DMSOp) (DMSOp is granular dimethylsulfoxide (DMSOd)) in the surface waters and seawater of different depths in the East China Sea, (DMSO) and c (DMSOp) in surface seawater were (10.10 ± 7.54) and (8.72 ± 7.80) nmolL, respectively, and their distributions were also studied (DMSOd) and c (DMSOp) all appeared in the shallow water layer (3 ~ 20 m). Correlation analysis showed that c (DMSOd) There was no correlation with c (DMS) (dimethylsulfide), but significant correlation with c (DMSOp) (R = 0.442, n = 41, P <0.006) In addition, DMSO (photochemical oxidation and microbial oxidation) of DMS was not found in the phytoplankton cells. In addition, there was a positive correlation between c (DMSOp) ρ and salinity (R = 0.532, n = 46, P <0.004) , Indicating that changes in salinity will affect changes in phytoplankton composition, and thus affect c (DMSOp).