亲脂性贝类毒素(LSTs)在全球海洋环境中广泛分布,潜在威胁海洋生态系统健康和水产养殖安全。在这项研究中,在渤海和黄海进行了两次大规模巡航,中国,在2023年春季和夏季澄清组成,浓度,以及水柱和沉积物中LSTs的空间分布。结果表明,冈田酸(OA),在春季和夏季收集的249个海水样品中检测到dinphyestoxin-1(DTX1)和/或果胶毒素-2(PTX2)。春季海水中∑LSTs的浓度范围为ND(未检测到)〜13.86,1.60〜17.03,2.73〜17.39和1.26〜30.21pmolL-1,中间,底部水柱和夏季地表水层,分别。春季和夏季海水样品中LSTs的检出率分别为97%和100%,分别。∑LSTs的浓度较高,春季主要分布在黄海北部和渤海东北部,在黄海东北部,夏季莱州湾和荣成湾周围水域。同样,只有OA,在表层沉积物中检测到DTX1和PTX2。总的来说,黄海北部表层沉积物中∑LSTs的浓度高于其他地区。在沉积物岩心中,主要在上层沉积物样品中检测到PTX2,而OA和DTX1在更深的沉积物中检测到,LST可以在沉积物中长时间存在。总的来说,OA,DTX1和PTX2广泛分布于渤海和黄海的水柱和表层沉积物中,中国。本研究结果有助于了解LST在海水和沉积物环境介质中的空间分布,并为植物毒素的健康风险评估提供基础信息。
Lipophilic shellfish toxins (LSTs) are widely distributed in marine environments worldwide, potentially threatening marine ecosystem health and aquaculture safety. In this study, two large-scale cruises were conducted in the Bohai Sea and the Yellow Sea, China, in spring and summer 2023 to clarify the composition, concentration, and spatial distribution of LSTs in the water columns and sediments. Results showed that okadaic acid (OA), dinophysistoxin-1 (DTX1) and/or pectenotoxin-2 (PTX2) were detected in 249 seawater samples collected in spring and summer. The concentrations of ∑LSTs in seawater were ranging of ND (not detected) -13.86, 1.60-17.03, 2.73-17.39, and 1.26-30.21 pmol L-1 in the spring surface, intermediate, bottom water columns and summer surface water layers, respectively. The detection rates of LSTs in spring and summer seawater samples were 97% and 100%, respectively. The high concentrations of ∑LSTs were mainly distributed in the north Yellow Sea and the northeast Bohai Sea in spring, and in the northeast Yellow Sea, the waters around Laizhou Bay and Rongcheng Bay in summer. Similarly, only OA, DTX1 and PTX2 were detected in the surface sediments. Overall, the concentration of ∑LSTs in the surface sediments of the northern Yellow Sea was higher than that in other regions. In sediment cores, PTX2 was mainly detected in the upper sediment samples, whereas OA and DTX1 were detected in deeper sediments, and LSTs can persist in the sediments for a long time. Overall, OA, DTX1 and PTX2 were widely distributed in the water column and surface sediments in the Bohai Sea and the Yellow Sea, China. The results of this study contribute to the understanding of spatial distribution of LSTs in seawater and sediment environmental media and provide basic information for health risk assessment of phycotoxins.