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阳澄湖和滆湖微囊藻毒素分布及其与富营养化因子的关系

Keywords: 微囊藻毒素,滆湖,阳澄湖,富营养化因子

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Abstract:

2013年6—10月进行了阳澄湖和滆湖的水样采集及分析,对水体中胞内和胞外3种微囊藻毒素(MC-LR,MC-RR,MC-YR)和TN、TP、Chl-a等富营养化指标在两湖的分布情况及关系进行了研究。结果表明,阳澄湖的微囊藻毒素及富营养化因子浓度在不同点位的差异小,而滆湖从北部到南部呈下降趋势,两湖相比,滆湖的浓度远远高于阳澄湖;富营养化因子影响微囊藻毒素的浓度分布和变化;相关性分析表明MC-LR、MC-RR和MC-YR与CODMn、TN、TP、PO43--P、Chl-a分别呈极显著正相关性(P<0.01),MC-LR、MC-YR与NH4+-N呈显著负相关(P<0.05);逐步回归性分析显示Chl-a是影响3种微囊藻毒素浓度的关键因子,可以通过Chl-a对水体中MCs的浓度进行预测,为微囊藻水华和微囊藻毒素污染的预警提供重要的科学参考。

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