缢蛏组织Cu累积对海水中溶解性有机碳的响应机制研究

养殖水体中存在的溶解性有机碳（DOC）能够对重金属的生物累积产生重要影响，然而目前对相关过程和机理的认识仍非常缺乏，严重限制渔业养殖环境中重金属风险评价的准确性。本项目拟以我国重要的滩涂养殖贝类缢蛏作为研究对象，针对缢蛏开放型养殖水域（滩涂）和封闭型养殖水域（池塘）DOC浓度和组成差异大的特点，通过毒代动力学模型研究在不同DOC浓度和类型的海水环境下缢蛏对水相来源Cu的累积过程，构建符合实际情况的毒代动力学模型并通过现场采样测定的数据对模型的预测结果进行验证。研究结果可望揭示养殖水体中DOC影响缢蛏对Cu累积、代谢的机理，为保护水产养殖生态环境和保障水产品的质量安全提供科学依据。

Dissolved organic carbon (DOC) in aquaculture water have an important impact on the bioaccumulation of heavy metals. However, there is still a lack of understanding of the relevant processes and mechanisms, which limits the accuracy of heavy metal risk assessment in aquaculture environment. In this case, Sinonovacula constricta, an important economic bivalve in China, is taken as the research animal. According to the characteristics of DOC concentration and composition between the open culture water (mud flat) and the closed culture water (pond), the accumulation process of Cu from dissolved phase by S. constricta in different DOC concentration and type of seawater environment will be studied, and a toxicokinetic model will be built according to the actual situation. The prediction results of the model will be verified by the data of field sample measurement. The results of this study are expected to reveal how DOC in aquaculture water affects the processes of Cu accumulation and metabolism of S. constricta, and provide scientific basis for protect the ecological environment of aquaculture and ensuring the safety of aquatic products.