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三峡水库春季营养盐和浮游植物空间分布及其影响机制

张 磊 夏志强 周 伟 HAMILTON Paul B HAFFNER Douglas

张 磊, 夏志强, 周 伟, HAMILTON Paul B, HAFFNER Douglas. 三峡水库春季营养盐和浮游植物空间分布及其影响机制[J]. 环境科学研究, 2015, 28(7): 1069-1077.
引用本文: 张 磊, 夏志强, 周 伟, HAMILTON Paul B, HAFFNER Douglas. 三峡水库春季营养盐和浮游植物空间分布及其影响机制[J]. 环境科学研究, 2015, 28(7): 1069-1077.
ZHANG Lei, XIA Zhiqiang, ZHOU Wei, Paul B. HAMILTON, Douglas HAFFNER. Spatial Distribution of Nutrients and Phytoplankton and Causes for Their Differences in Three Gorges Reservoir in Spring[J]. Research of Environmental Sciences, 2015, 28(7): 1069-1077.
Citation: ZHANG Lei, XIA Zhiqiang, ZHOU Wei, Paul B. HAMILTON, Douglas HAFFNER. Spatial Distribution of Nutrients and Phytoplankton and Causes for Their Differences in Three Gorges Reservoir in Spring[J]. Research of Environmental Sciences, 2015, 28(7): 1069-1077.

三峡水库春季营养盐和浮游植物空间分布及其影响机制

基金项目: 科技部国际科技合作专项项目(2013DFG92520)

Spatial Distribution of Nutrients and Phytoplankton and Causes for Their Differences in Three Gorges Reservoir in Spring

  • 摘要: 为研究三峡水库春季水体营养盐与浮游植物的空间分布状况,于2013年3月对三峡水库22条支流及干流的6个断面进行采样监测. 结果表明:来水、回水、河口和干流4类断面ρ(TN)平均值分别为1.69、1.84、2.01、1.51 mg/L;ρ(TP)平均值分别为0.115、0.191、0.179和0.181 mg/L;不同类型断面间ρ(TN)、ρ(TP)差异不显著;水体中N、P的主要形态分别为NO3--N和PO43--P;N/P〔n(N)/n(P)〕从来水(110.8)至干流(18.9)逐渐降低. 三峡水库总体上为中营养状态,回水和河口区富营养化程度较高,富营养断面比例分别为45.4%和36.4%. 研究期间共检出浮游植物8门98属,其中以绿藻门、硅藻门和蓝藻门为主,分别检出42、26和17属;从组成上看,来水和干流断面以硅藻-绿藻为主,回水、河口断面以绿藻-硅藻为主. 浮游植物丰度由高到低依次为回水、河口、来水和干流断面. 调查期间,22条支流中有15条支流在不同位置发生水华,但主要集中在回水区;拟多甲藻水华为主要类型且集中在库区的下游支流,而库区中上游支流则以隐藻、衣藻、小球藻、小环藻等水华为主. 环境因子排序分析表明,在水华集中的回水-河口区域,影响浮游植物丰度分布的主要环境因子数明显少于其他区域,温度和ρ(DO)为该区域浮游植物丰度分布的主要影响因子,而ρ(TN)、ρ(TP)的影响不明显.

     

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  • 刊出日期:  2015-07-25

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