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Dimethylsulfoniopropionate, dimethylsulfide, and acrylic acid of a typical semi-enclosed bay in the western Yellow Sea: Spatiotemporal variations and influencing factors
Marine Chemistry ( IF 3 ) Pub Date : 2022-08-13 , DOI: 10.1016/j.marchem.2022.104159
Chun-Ying Liu , Lu Han , Li-Li Wang , Pei-Feng Li , Gui-Peng Yang

As the degradation products of dimethylsulfoniopropionate (DMSP), dimethylsulfide (DMS) and acrylic acid (AA) are crucial to the sulfur cycle in the ocean. However, the biogeochemical processes of DMSP, DMS, and AA remain unclear. A monthly investigation was conducted to determine the DMSP, DMS, and AA concentrations and related parameters in the surface water of Jiaozhou Bay, a semi-enclosed bay in the western Yellow Sea, from December 2010 to November 2011. The monthly mean concentrations of DMSP, DMS, and AA were in the ranges of 5.02–27.25 nmol L−1, 0.41–3.14 nmol L−1, and below the detection limit–301.75 nmol L−1, respectively, showing significant seasonal variations with higher concentrations in summer than in autumn. The results were attributed to a combination of biogenic factors, including phytoplankton, zooplankton, and bacteria, as well as environmental factors, such as temperature and nutrients. The DMSP, DMS, and AA concentrations were not significantly correlated with chlorophyll a and bacterial abundance because of the influence of the community structure and anthropogenic activities. DMS was mainly produced by the enzymatic cleavage of DMSP, whereas AA was affected primarily by terrigenous input. The monthly mean sea-to-air fluxes of DMS ranged from 0.74 (in Apr) to 6.55 (in Jan) μmol m−2 d−1 with an average of 2.80 μmol m−2 d−1.



中文翻译:

黄海西部典型半封闭海湾的二甲磺丙酸、二甲硫和丙烯酸:时空变化及影响因素

作为二甲基磺基丙酸酯(DMSP)的降解产物,二甲基硫醚(DMS)和丙烯酸(AA)对海洋中的硫循环至关重要。然而,DMSP、DMS和AA的生物地球化学过程仍不清楚。2010 年 12 月至 2011 年 11 月,对黄海西部半封闭海湾胶州湾地表水中 DMSP、DMS 和 AA 浓度及相关参数进行了月度调查。DMSP 月平均浓度、DMS 和 AA 在 5.02–27.25 nmol L-1、0.41–3.14 nmol L-1,低于检测限–301.75 nmol L-1,分别显示出显着的季节性变化,夏季浓度高于秋季。结果归因于生物因素的组合,包括浮游植物、浮游动物和细菌,以及环境因素,如温度和营养物质。由于群落结构和人为活动的影响,DMSP、DMS和AA浓度与叶绿素a和细菌丰度无显着相关性。DMS 主要由 DMSP 的酶解产生,而 AA 主要受陆源输入的影响。DMS 月平均海气通量为 0.74(4 月)至 6.55(1 月)μmol m -2 d -1,平均为 2.80 μmol m -2 d-1

更新日期:2022-08-13
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