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湖泊科学  2010 

太湖夏秋季大型枝角类(Daphnia)种群消失的初步分析

DOI: 10.18307/2010.0411

Keywords: ,种群消退,高温,磷浓度,太湖

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Abstract:

水体温度过高和磷浓度是影响枝角类Daphnia存活和繁殖的重要因子,因此本研究假设太湖夏秋季水体高温和磷浓度是引起Daphnia种群夏秋季消退的原因.通过夏秋季两次为期各15d的模拟实验,模拟高温和添加磷盐对太湖春季优势种同形溞Daphniasimilis种群的影响,结果表明在高温和不添加磷盐的条件下,同形溞均有较高的种群增长率,证实夏秋季太湖水体高温和磷浓度不是限制Daphnia种群的因素,同时推测,鱼类的捕食作用和微囊藻水华对Daphnia种群的消退可能起作用.

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