锦州湾沾污沉积物急性毒性的海洋端足类检验

１９９２年９月￣１９９３年１月对锦州湾沾污沉积物的海洋端足类急性毒性效应进行了研究。从锦州湾湾顶到湾口沿西南－－东北方向每２ｋｍ等距离采集２７个表层沉积我校 品，应用海洋端足类Ａ ｍｐｅｌｉｓｃａ ａｂｄｉｔａ对这些样品进行了１０ｄ直流式急性毒性检验，检验指标为死亡率。结果表明，五里河河口处受试生物死亡率最高，为１００％，从湾顶该河口处沿东北方向随着距离增加，死亡率逐渐递减，笔架山处最低，仅为２．

TESTING ACUTE TOXICITY OF CONTAMINATED SEDIMENT IN JINZHOU BAY WITH MARINE AMPHIPODS

Sediments in som areas of Jinzhou Bay are conednated seriouly by heavy metals and orghoc conednants. To assess the biological effects of these compouns in the sedimentseven surfase sampes of sediment were collected at an interval of about 2km between sampling stations in a transect cross the bay along SWNE and the sediment toxicity was measured by conducting 10-day flow-through sediment asute toxicity test with amphipod species Ampelisca abdita in which the end point was mortality from September 1992 to January 1993. The results of this study showed the highest asthe mortality, 100%, occurred at location 1, the mouth of Wuli River,and the mortality of the amphipods presented an exponent decrease in the tranechon from location 1 to location 7 where the mortality was the lowest 2.5%.The transection investigated in Jinzhou Bay may be divided into three section to assess the sediment quality depending on the results of Jinzhou Bay sediment asute toxicity tesL South-westem part of the top of the bay location 1 and 2, was an heavily polluted are with a 90%-100%amghipod mortality. Middle Pat of the bay, location 3 and 4, was polllted too, with more than 30% mortality. Northeastem Pall of the mouth of the bay, location 5-7, was a relatively natural area, without toxicity to the amphipods.The sediments in Jinzhou Bay contained a large number metals and orgboc compounds. Metal analysis indicated that all the highest concentrations of the 10 metals occured at the mouth of Wuli hiver and as the disthee increases from the area toward North-eastem, the metal concentration decrease dramaticaly, the lowest concenhaonss of the metals occurring at the mouth of the bay (location 5-7)- Organic compounds analysis demonshated tha the mouth of the Wuli River was polluted by toxic orgedc compounds too. The concentalons of the orgedc contaminants in the surface sediment at location 1 were 3-5 hmes higher than those at location 2.The vedance trend of the sediment toxicities to amghipods was coincident with the distribution thend of the contaminants in the sediments and in situ ecologicaJ distribution bend of the benthos in Jinzhou Bay and all of them basically reflected the pollution status of Jinzhou Bay.