目前，北黄海是我国沿岸海域麻痹性贝毒污染最为严重，腹泻性贝毒污染仅次于南海；虾夷扇贝毒素、扇贝毒素和软骨藻酸毒素等新记录毒素也在北黄海发现。北黄海是我国贝类重要产区，弄清北黄海严重污染的藻毒素来源及其在食物网中的传递，对我国沿岸海域藻毒素监测，保障公众健康，具有切实指导价值；发现新记录的毒素等，有较高的学术意义。. 沿岸海域藻毒素有着明显的区域、季节及年际变化特征，为了弄清藻毒素的准确来源，在北黄海赤潮易发典型海域河口区、浮筏贝类养殖区、鱼类网箱养殖区、底播养殖区、市政排污区等，布设9个站位，逐月连续3周年调查，进行水体和沉积物中有毒藻类、甲藻孢囊、蓝细菌的种类及密度/丰度，以及相对应的藻毒素种类及含量的检测，并通过分离纯化有毒藻种、萌发甲藻孢囊等实验，确定北黄海藻毒素的来源。通过检测藻毒素在滤食性双壳贝类和鱼类及浮游动物等体中种类及含量，来解释藻毒素在食物网主要营养层次的转化。

The algal toxins compostion and level have changed with ecolgical coditions at diferent area,months and years.To well and truly find the origins of algal toxins,.9 investigated stations has been designed at the estuarine, bivavle raft-culture，bivalve bottom-culture, fish cage-culture ,cantonal pollution limber sea area along the northern Yellow sea. The toxic algae, cyst and cyanobacterea species and density in the sea water and sediment will be invetigated every month keeping on 3 years. Meanwhile,toxisn composition and level in the sea water,sedment,toxic algae, cyst,cyanobactreia,bivalve and fish ect will be monitored. By the algae individual culture and bourgeon experiment at laboratory, will find new recoding toxic species.By the field investigation and laboratory experiment, will be ascertain the toxins origin and translation on the food web on the northern Yellow Sea.