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大鹏澳海水鱼类网箱养殖对沉积环境的影响

Keywords: 网箱养鱼,沉积环境污染,大鹏澳

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Abstract:

为了评估大亚湾大鹏澳海水鱼类网箱养殖对养殖区及其邻近海域(对照区)沉积环境的影响,于2001年6月—2004年10月按季度对该养殖海域进行了8个航次的调查。对所获沉积物样品的理化因子按《海洋监测规范》和《海洋调查规范海洋地质地球物理调查》规定的方法进行了分析。结果表明,养殖区和对照区沉积物类型均是黏土质粉砂,没有明显差异;养殖区沉积物含水率、有机碳和硫化物含量平均值分别为60.5%、2.82%和562mg·kg-1,均显著高于对照区的55.8%、2.42%和238mg·kg-(1P秋季>冬季,而对照区的季节变化均较为稳定,差异不大;养殖区与对照区底层海水DO的季节变化特征基本相似,为冬季>春季>秋季>夏季。海水鱼类网箱养殖已对养殖区沉积环境造成了严重污染,其污染程度的季节变化与养殖生产的季节周期有密切关系。

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