双齿围沙蚕代谢对复合污染的响应:监测种/修复种辨析

为研究复合污染下双齿围沙蚕(Perinereis aibuhitensis)的代谢特征，判断其用于复合污染监测、修复的潜在性，将双齿围沙蚕暴露于重金属-石油烃复合污染20天，测定其耗氧率、氨氮排泄率和O:N比对复合污染的响应。结果表明：0~1.00 mg/L的Cd和0~0.20 mL/L的石油烃不影响双齿围沙蚕的代谢及其代谢底物，2种污染物也无交互效应。因此，双齿围沙蚕对重金属-石油烃复合污染不敏感，是一个耐污种类；将双齿围沙蚕直接暴露于污染水体的实验将低估其耐污性。利用双齿围沙蚕进行生物监测并不合适，它更适用于生物修复重金属-石油烃复合污染。

Reponses of Perinereis aibuhitensis Metabolism to Multiple-contamination: Its Utilization Analysis for Monitoring or Restoration

To study metabolism characteristics of Perinereis aibuhitensis under multiple-contamination and to judge its potential utilization for environment monitoring and bio-restoration, P. aibuhitensis was exposed to multiple-contamination of heavy metals and petroleum hydrocarbon for 20 days. Oxygen consumption rate, ammonia excretion rate and ratio of O:N were calculated. The results showed that Cd and petroleum hydrocarbon did not have significant effect on metabolism and metabolic substrate of P. aibuhitensis when the concentration of Cd and petroleum concentration was 0-1.00 mg/L and 0-0.20 mL/L, respectively. Moreover, there was no interaction effect of Cd and petroleum hydrocarbon. As a pollution resistant species, P. aibuhitensis was not sensitive to heavy metal and petroleum hydrocarbon. Its resistance to contamination would be underestimated if it was exposed to contaminations without sand. It was not suitable to monitor the environment only using P. aibuhitensis, and P. aibuhitensis could be used for bio-restoration of multiple-contamination of heavy metals and petroleum hydrocarbon.