Wei Yuqiu, Li Zhixiang, Ding Dongsheng, Zhang Xuzhi, Yang Qian, Sui Qi, Sun Jun, Cui Zhengguo
State Key Laboratory of Mariculture Biobreeding and Sustainable Goods, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China; College of Fisheries and Life Science, Dalian Ocean University, Dalian, China.
State Key Laboratory of Mariculture Biobreeding and Sustainable Goods, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.
Mar Pollut Bull. 2025 Oct;219:118256. doi: 10.1016/j.marpolbul.2025.118256. Epub 2025 Jun 6.
Jinghai Bay is plagued by heavy metal (HM) pollution that is likely to increase in the coming decades along with social and demographic trends. However, relatively little is known about the pollution levels and ecological risks associated with HMs in seawater and sediments of the bay, limiting our ability to assess their impacts on local aquatic environment and to develop effective management strategies. We investigated the concentrations and spatial distribution of HMs (i.e., Cu, Zn, Pb, Cd, Hg, and As) in both seawater and sediments of Jinghai Bay, focusing on their pollution levels and associated ecological risks. The HM concentrations in seawater of Jinghai Bay during the study period were ranked as follows: Zn > Cu > Pb > As > Cd > Hg, while in the sediments, the ranking was: Zn > Pb > Cu > As > Cd > Hg. The spatial distributions of Cu, Zn, Pb, Cd, Hg, and As in seawater and sediments of the bay varied largely between the spring and summer, probably owing to local environmental conditions, sediment resuspension, and anthropogenic influences. In terms of pollution levels and associated ecological risks, Cd and Hg in seawater were the primary pollutants in the bay. HMs in sediments were also present at elevated concentrations, with Cu, Pb, and Hg emerging as the most concerning pollutants, leading to potential ecological risks. The correlation analyses indicated that salinity and DO were the key factors driving the dynamics of HMs in seawater. In addition, the distinct seasonal groupings of HMs in both seawater and sediments suggested that similar anthropogenic sources and/or geochemical processes governed the levels of these metals. Collectively, assessing the concentrations, spatial distribution, and ecological risks of HMs in aquatic ecosystems is vital for understanding the impacts of human activities and natural processes and for enacting management strategies to reduce HM pollution in Jinghai Bay.
静海湾饱受重金属污染之苦，随着社会和人口趋势发展，未来几十年这种污染可能会加剧。然而，对于该海湾海水和沉积物中重金属的污染水平及相关生态风险，我们了解得相对较少，这限制了我们评估其对当地水生环境影响以及制定有效管理策略的能力。我们调查了静海湾海水和沉积物中重金属（即铜、锌、铅、镉、汞和砷）的浓度及空间分布，重点关注其污染水平和相关生态风险。研究期间，静海湾海水中重金属浓度排序如下：锌＞铜＞铅＞砷＞镉＞汞，而沉积物中的排序为：锌＞铅＞铜＞砷＞镉＞汞。该海湾海水和沉积物中铜、锌、铅、镉、汞和砷的空间分布在春季和夏季差异很大，这可能是由于当地环境条件、沉积物再悬浮以及人为影响。就污染水平和相关生态风险而言，海水中的镉和汞是该海湾的主要污染物。沉积物中的重金属浓度也较高，铜、铅和汞成为最令人担忧的污染物，导致潜在生态风险。相关性分析表明，盐度和溶解氧是驱动海水中重金属动态变化的关键因素。此外，海水和沉积物中重金属明显的季节性分组表明，类似的人为来源和/或地球化学过程决定了这些金属的含量。总体而言，评估水生生态系统中重金属的浓度、空间分布和生态风险，对于理解人类活动和自然过程的影响以及制定减少静海湾重金属污染的管理策略至关重要。
