摘要
1989～1997年于广东沿海设12个牡砺采样点，研究广东沿海牡蛎体总铬的含量水平、地理分布特点和变化趋势。全部牡蛎样品的总铬含量均远低于海洋生物污染评价标准值，属正常本底水平或轻微污染水平。牡蛎体总铬含量的地理分布特点是珠江口海区≥粤西海区＞粤东海区。1989～1991年间，牡蛎体总铬的平均含量呈下降趋势；1991～1994年间，牡蛎体总铬的平均含量年际间虽有波动，但没有显著变化；1994年以后，牡蛎体总铬的平均含量呈上升趋势。
According to the determined data and certain documents the levels and temporalspatial distribution characteristics of total Cr in the oysters collected from 12 sampling sites along Guangdong coasal waters from 1989 to 1997 has stated in this paper. The result showed that the contents of total Cr in all samples are far less than the level of Marine Biology Pollution Evaluation Standard with the normal base line levels or the slight pollution levels. The total Cr contents in the oysters were found to decline in the following order: the Pearl River estuary ≥west Guangdong coasal waters > east Guangdong coasal waters. The average concentrations of total Cr in the oysters showed a decreasing trend from 1989 to 1991 following a relatively stable period from 1991 to 1994, and after 1994, it showed an increasing trend.
出处
《湛江海洋大学学报》
1998年第4期26-30,共5页
Journal of Zhanjiang Ocean University
关键词
总铬
牡蛎
广东沿海
Total chromium Oyster Guangdong coastal waters
