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湖泊科学  2012 

南京秦淮河叶绿素a空间分布及其与环境因子的关系

DOI: 10.18307/2012.0215

Keywords: 秦淮河,叶绿素a,环境因子,相关分析

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Abstract:

近年来,流动的河流开始陆续暴发藻类水华,河流的水华现象是继湖泊水华现象之后又一倍受关注的科学问题.秦淮河水体污染严重并于2010年8月和9月间暴发水华.采用2010年8月15日和9月8日的秦淮河野外调查数据,对秦淮河水体叶绿素a的空间分布特征及其与环境因子的相关关系进行研究.结果表明,从上游到下游,秦淮河水体叶绿素a含量的分布表现出一定的空间差异性,平均值为73.7μg/L,其中马木桥样点的叶绿素a含量最高(184.52μg/L);秦淮河水体氮磷比为26.86,水体叶绿素a浓度的对数与TP的对数呈正相关,与氮磷比的对数呈负相关,表明磷可能是秦淮河蓝藻生长的主要影响因子;河流水体叶绿素a浓度与pH和DO呈极显著正相关,与NO2--N呈显著相关,而与NH4+-N、NO3--N和TN无显著相关.

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