Biogeochemistry of dimethylsulfide (DMS) and dimethylsulfoniopropionate (DMSP) in the surface microlayer and subsurface water of the western North Atlantic during spring
Biogeochemistry of dimethylsulfide (DMS) and dimethylsulfoniopropionate (DMSP) in the surface microlayer and subsurface water of the western North Atlantic during spring
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DOI：
10.1016/j.marchem.2005.03.003
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发表时间：
2005-09
期刊：
影响因子：
3
通讯作者：
Guipeng Yang;M. Levasseur;S. Michaud;M. Scarratt
中科院分区：
文献类型：
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作者：
Guipeng Yang;M. Levasseur;S. Michaud;M. Scarratt
2003年4 - 5月在北大西洋西部采集了16个表层微层样品和相应的次表层水样，研究了二甲基硫（DMS）和二甲基磺基丙酸盐（DMSP）的分布和循环及其影响因素。在表层微层中，高浓度的DMS主要出现在叶绿素a含量高的样品中，DMS与叶绿素a含量之间存在显著的相关性。此外，微层DMS浓度与微层DMSPd（溶解）浓度相关。DMSPd被认为是丰富的微层中的平均富集因子（EF）为5.19。然而，没有发现微层富集的DMS收集的大多数样品。有趣的是，微层中的DMS产生速率远高于地下水中的DMS产生速率。微层中DMS产量的增加可能是由于微层中DMSPd浓度较高所致。在这项研究中观察到一个一致的模式，其中DMS，DMSPd，DMSPp（颗粒）和叶绿素a在微层中的浓度密切相关，其相应的地下水浓度，这表明这些成分在微层直接依赖于从散装液体下面的运输。微层中DMS产量的增加进一步强化了表面微层相对于底层水具有更大生物活性的结论。
Sixteen surface microlayer samples and corresponding subsurface water samples were collected in the western North Atlantic during April–May 2003 to study the distribution and cycling of dimethylsulfide (DMS) and dimethylsulfoniopropionate (DMSP) and the factors influencing them. In the surface microlayer, high concentrations of DMS appeared mostly in the samples containing high levels of chlorophyll a, and a significant correlation was found between DMS and chlorophyll a concentrations. In addition, microlayer DMS concentrations were correlated with microlayer DMSPd (dissolved) concentrations. DMSPd was found to be enriched in the microlayer with an average enrichment factor (EF) of 5.19. However, no microlayer enrichment of DMS was found for most samples collected. Interestingly, the DMS production rates in the microlayer were much higher than those in the subsurface water. Enhanced DMS production in the microlayer was likely due to the higher concentrations of DMSPd in the microlayer. A consistent pattern was observed in this study in which the concentrations of DMS, DMSPd, DMSPp (particulate) and chlorophyll a in the microlayer were closely related to their corresponding subsurface water concentrations, suggesting that these constituents in the microlayer were directly dependent on the transport from the bulk liquid below. Enhanced DMS production in the microlayer further reinforces the conclusion that the surface microlayer has greater biological activity relative to the underlying water.