| 基于多生物标志物污染指数法的北部湾潮间带污染程度评价 |
| 摘要点击 2960 全文点击 1965 投稿时间：2011-12-08 修订日期：2012-03-11 |
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| 中文关键词 北部湾 波纹巴非蛤(Paphia undulata) 生物标志物 多生物标志物污染指数法(MPI) 污染评价 |
| 英文关键词 Beibu Gulf Paphia undulata biomarkers multi-biomarker pollution index (MPI) pollution assessment |
| DOI 10.13227/j.hjkx.20121006 |
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| 中文摘要 |
| 采用多生物标志物污染指数法(multi-biomarker pollution index,MPI)评价北部湾潮间带的污染状况. 2011年4月在北部湾沿海潮间带设置9个站位采集波纹巴非蛤(Paphia undulata)和沉积物样品,分析波纹巴非蛤鳃和内脏中9种生物标志物活性(含量)以及沉积物中12种化学污染物的含量. 根据每种生物标志物与沉积物中化学污染物之间的皮尔逊相关性,筛选波纹巴非蛤鳃中的氧化型谷胱甘肽(GSSG)、还原型谷胱甘肽(GSH)和谷胱甘肽硫转移酶(GST),以及内脏中的硫代巴比妥酸反应物(TBARS)和谷胱甘肽过氧化物酶(GPx)作为评价指标,将某站位上述5种生物标志物响应值赋予相应的污染指数,叠加后即得到该站位的MPI值. 结果表明,不同站位污染水平有所差别,所有站位的MPI值范围在18~39之间,涵盖"清洁"、"质量良好"、"轻微污染"三个等级,未出现"污染"或"严重污染"站位. 湛江市北港码头(S1)、钦州湾老人沙浅滩(S3)、防城港西湾(S4)和北海市西场(S7)呈轻微污染,其他站位环境清洁或质量良好,说明北部湾潮间带整体环境质量良好,但已开始受到人为活动的轻微干扰. |
| 英文摘要 |
| This paper assessed the coastal environmental quality along the Beibu Gulf using a statistical approach, multi-biomarker pollution index (MPI). Samples of clam (Paphia undulata) and sediment were collected at nine sites from the intertidal zone of Beibu Gulf in April 2011.Nine biomarkers of response were measured both in gill and digestive gland in Paphia undulata, and twelve kinds of contaminants were measured in different sediment samples. According to the Pearson’s correlation coefficients between biomarker responses in Paphia undulata and contaminant levels in sediments, five biomarkers either in gill for oxidized glutathione (GSSG), reduced glutathione (GSH), glutathione S-transferase (GST) or in digestive gland for thiobarbituric acid reactive substances (TBARS) and glutathione peroxidase (GPx) were selected for MPI calculation. For each biomarker at each site, a response index was allocated, and the MPI value of this site was calculated as the sum of the response index of the five biomarkers. The results of the calculation (MPI values from 18 to 39) showed significant differences among sampling sites. The environmental quality of all sites ranged from class 1 (clean) to class 3 (lightly contaminated), and no site fell into class 4 (contaminated) or class 5 (heavily contaminated), indicating a good environmental quality in the intertidal zone of Beibu Gulf. However, the environmental quality at some sites (S1, S3, S4 and S7) fell into class 3 (lightly contaminated), indicating mild interference from human activities has occurred. |
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