太湖东北部沉积物生物可利用磷的季节性变化  

Seasonal Variation of Bioavailable Phosphorus in Sediments in Northeast Part of Taihu Lake

作　　者：徐玉慧[1] 姜霞[2] 金相灿[2] 王琦[2] 马小凡[1] 

机构地区：[1]吉林大学环境与资源学院,长春130026 [2]中国环境科学研究院湖泊生态环境创新基地,北京100012

出　　处：《环境科学》2006年第5期869-873,共5页Environmental Science

基　　金：国家重点基础研究发展规划(973)项目(2002CB412304);国家自然科学基金项目(20507017)

摘　　要：对太湖东北部营养水平不同的梅梁湾，贡湖湾和胥口湾3湖区表层（0～10cm）沉积物中总磷与4种生物可利用磷的季节性变化进行了研究．结果发现，各湖区沉积物中总磷及各形态生物可利用磷的含量与其水体营养水平相一致；不同点位沉积物中总磷与各生物可利用磷含量存在较大差异，同一点位不同季节沉积物中总磷与生物可利用磷的含量也显著不同．表层沉积物中各生物可利用磷始终与总磷有很好的相关性并且随季节变化．建议评估沉积物对藻类的供磷能力及潜在释放危险时。以不同季节的总磷含量为依据进行比较分析更为确切。The concentrations of total phosphorus（TP）, bioavailable phosphorus（BAP） and their seasonal changes in the surface sediments（0- 10 cm） from three different regions of northeast of Taihu Lake were investigated. The results show that the concentrations of TP and BAP in the sediment are coincided with the corresponding trophic level of the overlying water. The concentrations of TP and BAP in the sediments varied widely not only between sampling sites but also between seasons. There is a significant correlation between BAP and TP in surface sediments, and their regression analysis equation varies with seasons. It is suggested to evaluate potential phosphorus-release risk of the sediment based on the TP concentration of the corresponding seasons.

关 键 词：太湖 沉积物 生物呵利用磷 季节性变化 

分 类 号：X524[环境科学与工程—环境工程]