The influence of abiotic and biotic factors on the concentration of dimethylsulfoniopropionate (DMSP) and dimethylsulfoxide (DMSO) was investigated and compared during two annual cycles in 2016 and 2018 in the Belgian coastal zone (BCZ) in the southern North Sea at five fixed stations. These stations covered a near-offshore gradient from stations close to the mouth of the Scheldt estuary to most offshore stations. Significant differences of Chlorophyll-a (Chl-a) concentrations were observed between the two years with higher values in early spring 2018 (due to better light and nutrient conditions coupled to colder temperatures) and in summer 2018 (due to warmer conditions) compared to 2016. Nevertheless, the seasonal and spatial DMSP and DMSO (DMS(P,O)) patterns, as well as the yearly average were nearly identical in 2016 and 2018. This can be explained by the fact that the phytoplankton groups responsible for the large differences in Chl-a in 2018 and 2016 were low DMSP-producers characterized by several diatom and dinoflagellate species, occurring in early spring and summer. Further, the Prymnesiophyceae Phaeocystis globosa, occurring in late spring and responsible of most of DMS(P,O) measured in the area, reached similar biomass both years. The DMSP:Chl-a ratio obtained from the field measurements were similar to those previously published for the main observed phytoplankton groups, but more differences were observed for the DMSO:Chl-a ratio. DMS(P,O) estimations based on Chl-a linear regressions for the whole dataset need to account on two relationships discriminating the low and high-DMSP producing species.

在2016年和2018年的两个年度周期内，在北海南部五个固定站的比利时沿海地区（BCZ），研究和比较了非生物和生物因素对二甲基磺丙酸二甲酯（DMSP）和二甲基亚砜（DMSO）浓度的影响。这些站点涵盖了从近海尔德河口入海口到大多数近海站点的近海梯度。叶绿素a（Chl- a）在两年之间观察到浓度，与2016年相比，在2018春季初（由于更好的光照和营养条件以及较低的温度）和2018年夏季（由于较温暖的条件）更高的浓度。然而，季节性和空间DMSP和DMSO（DMS（P，O））的图案，以及年平均为在2016年和2018年这几乎相同可以通过以下事实负责Chl-差异大的浮游植物基团进行说明一个在2018年和2016年分别为低DMSP生产者，特征是在春季和夏季初出现几种硅藻和鞭毛藻。此外，小球藻科的Phaeocystis globosa发生在春末，并对该地区测得的大部分DMS（P，O）造成了影响，两年均达到了相似的生物量。从田间测量中获得的DMSP：Chl- a比值与先前公布的主要观察到的浮游植物群体的比例相似，但在DMSO：Chl- a比值上观察到更多差异。DMS（P，O）的基础上估计Chl-一个用于整个数据集需要帐户线性回归上两个关系辨别低和高DMSP产生物质。