苯并(a)芘、镉单一及复合污染对双齿围沙蚕3刚节疣足幼体发育的影响  

Single and joint toxic effects of benzo(a)pyrene and cadmium on development of three-setiger juvenile of polychaete Pernereis aibuhitensis Grube

作　　者：宋莹莹[1,2] 袁秀堂[1] 张升利[1,2] 杨大佐[2] 郭皓[1] 周一兵[2] 

机构地区：[1]国家海洋环境监测中心,辽宁大连116023 [2]大连海洋大学生命科学与技术学院,辽宁大连116023

出　　处：《海洋环境科学》2011年第3期333-336,共4页Marine Environmental Science

基　　金：国家海洋公益性行业科研专项(200805069);国家863项目(2006AA10Z410);国家自然科学基金(30571419)

摘　　要：为评估多环芳烃与重金属单一及复合污染对海洋底栖多毛类早期发育的影响,本文选取苯并(a)芘(BaP)和镉(Cd)作为目标污染物,进行了二者单一及复合污染对广泛分布于我国河口和海湾的双齿围沙蚕(Pernereis aibuhitensis)3刚节疣足幼体发育影响的72 h急性毒性实验。结果表明:(1)单一污染胁迫下,BaP对沙蚕幼体的毒性作用显著(P<0.05),致畸效应明显,而Cd对沙蚕幼体的毒性作用不显著(P>0.05),当Cd浓度最高为2000μg/L时幼体正常发育的比例仍高达82.3%;沙蚕3刚节疣足幼体非正常发育的BaP和Cd半数效应浓度(EC50)分别为125.03μg/L和13.3 g/L。(2)复合污染胁迫下,幼体发育受BaP+Cd低浓度配比组合(0.5+5,0.5+50,5+5,5+50μg/L)的影响较小,复合毒性以拮抗作用为主;但受BaP+Cd高浓度配比组合(50+500,50+2000,500+500,500+2000μg/L)的影响显著增大(P<0.05),复合毒性主要表现为协同作用。In order to demonstrate the toxic effects of single and/or combined pollution of polycyclic aromatic hydrocarbons（PAHs） and heavy metals on the early development of polychaete Pernereis aibuhitensis,the 72 h acute toxic experiments of benzo（a）pyrene（BaP） and cadmium（Cd） on the three-setiger juvenile of P.aibuhitensis,which is a common species in the bays and estuaries of China,was investigated.As a result,under single B／P pollution,a significant decrease of the percentage of normally hatched larvae and abnormality was observed,however,as to the increasing concentration of Cd solutions,even exposure to the highest concentration,2000 μg/L,the percentage of successful development of juveniles can also reached as high as 82.3%,and there＇s no obvious abnormality,therefore,the single toxic effects of Cd on larvae development is insignificant,and the abnormal development of medium concentration（EC50） is 125.03 μg/L for B／P,13.3 g/L for Cd respectively.On the other hand,joint toxic effects caused by the combined pollution appear more complicated.Different concentration of the mixture lead to distinct kind of joint toxic effect,the influence on the percentage of normality is significant.As in the former four combinations of low concentration,the joint toxic effects is antagonism,but it gives priority to synergism when expose to the latter four high concentration of mixture exposure.

关 键 词：复合污染 BAP Cd 双齿围沙蚕 3刚节疣足幼体 发育 

分 类 号：Q331[生物学—遗传学] Q178.53