摘要
根据 198 9～ 1997年广东沿岸 12个采样点近江牡蛎 (CrassostrearivularisGould)体Cd的测定数据和有关历史资料 ,分析了广东沿岸牡蛎体Cd含量与时空分布特点。所有牡蛎体样品均检出Cd ,含量为( 0 .0 8～ 7.81)× 10 - 6,总平均值为 1.92× 10 - 6。粤东与粤西沿岸除个别样品外 ,绝大部分Cd含量均远低于评价标准 ,而珠江口沿岸样品的超标率则达到 2 5%。牡蛎体Cd含量的空间分布呈珠江口 >粤西 >粤东。1989～ 1997年 ,牡蛎体Cd含量的年际变化呈双峰分布 ,次高值和最高值分别出现在 1992年和 1995年 ,其余年份虽有波动 ,但无显著差异。
The monitoring and experiment were conducted from 1989 to 1997. There were 12 sampling stations set along Guangdong coastal waters.The results show that the Cd content in all oyster samples was detectable,ranging from 0.08×10 -6 to 7.81×10 -6 with an overall average of 1.92×10 -6 . The content of Cd in most of the oyster samples collected from east Guangdong coastal waters and west Guangdong coastal waters was well below the level of Marine Biology Pollution Evaluation Standard (MBPES), while Cd content in 25% of the samples collected from Pearl River estuary exceeded the MBPES level. The spatial distribution of Cd content in the oysters was in the following order: the Pearl River estuary>west Guangdong coastal waters>east Guangdong coastal waters. The temporal variation of Cd content in the oysters showed a double peak pattern from 1989 to 1997 with the maximum value in 1995 and second highest value in 1992, respectively, while Cd content showed no significant difference in the other monitoring years.
出处
《中国水产科学》
CAS
CSCD
2000年第4期82-86,共5页
Journal of Fishery Sciences of China
基金
中国水产科学研究院"八五"资助项目! (91 7 1)
农业部渔业局重大渔业环境专题资助项目! (95 97 1)
关键词
广东沿岸
近江牡蛎
污染评价
时空分布
镉含量
Guangdong coastal waters
Crassostrea rivularis
Cd
pollution assessment
temporal spatial distribution
