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１９８９～１９９３年对广东沿岸海域１４个观察站的牡蛎Ｃｄ含量进行了监测。结果表明，广东沿海牡蛎Ｃｄ含量存在着明显的地理差异，牡蛎Ｃｄ含量的地理分布基本上如实地反映了广东沿岸海域环境中Ｃｄ的地理分布状况；牡蛎Ｃｄ含量的季节变化明显，高值出现在秋季，低值出现在春季，牡蛎Ｃｄ含量的季节变化在很大程度上受控于牡蛎自身的生物条件；个别观察站牡蛎Ｃｄ含量的年际变化较大，但就整个广东沿海来说牡蛎Ｃｄ含量的年限变化幅度较小．且１９８９～１９９３年间广东沿海牡蛎Ｃｄ含量的空间分布格局基本上没有发生明显的变化，这反映了１９８９～１９９３年间广东沿海环境中Ｃｄ含量水平和地理分布无明显的变化
From 1989 to 1993, the content of Cd in oysters of 14 observation stations in Guangdong coastal waters was monitored. The results showed that there was a clear geographical difference in the Cd content of coastal oysters in Guangdong. The geographical distribution of Cd in the oyster basically reflected the geographical distribution of Cd in coastal areas of Guangdong. The seasonal variation of Cd content in oysters was obvious, In autumn, the low value appeared in spring, and the seasonal variation of Cd content in oysters was largely controlled by the oyster’s own biological conditions. The annual variation of Cd content in individual oysters was larger. However, for the whole coastal area of Guangdong, oyster Cd Changes in the content of the smaller duration. The spatial distribution pattern of Cd in coastal oysters of Guangdong Province during 1989-1993 basically did not change significantly, which shows that there was no obvious change of Cd content and geographical distribution in Guangdong coastal environment from 1989 to 1993