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湖泊科学  2010 

-座新建水库—广东剑潭水库浮游植物动态特征

DOI: 10.18307/2010.0212

Keywords: 剑潭水库,水力滞留时间,浮游植物

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Abstract:

剑潭水库是珠江水系东江下游新建水库,2006年10月开始蓄水,2007年6月蓄水完毕.该水库属直流型水库,2008年水力滞留时间为0.46-3.62d.2006-2008年调查了该水库浮游植物的动态特征.结果表明,调查期间浮游植物丰度为182-6267cells/ml,从空间变化看,在调查期间,浮游植物丰度由上游向下游呈上升趋势.从年间变化看,蓄水后第-年坝区浮游植物丰度不仅明显高于蓄水前和蓄水期间,并且浮游植物最高丰度出现在蓄水后第-年的枯水期(12月).与此同时,在蓄水过程中,浮游植物群落结构也逐渐发生了变化,蓝藻相对丰度明显上升,绿藻相对丰度呈下降趋势.水力滞留时间、透明度和总磷是影响剑潭水库浮游植物时空变化的重要因素.高的平流损失率和低的透明度使得浮游植物现存量与水库氮、磷水平并不相符.相对较长的水力滞留时间、较高的透明度和总磷导致了浮游植物在蓄水后第-年(2008年)的枯水期出现-个峰值.

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