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重污染河道中浮游植物初级生产力特征
引用本文:万蕾,朱伟.重污染河道中浮游植物初级生产力特征[J].生态环境学报,2010,19(1).
作者姓名:万蕾  朱伟
作者单位:1. 徐州工程学院,江苏,徐州,221008
2. 河海大学环境科学与工程学院,江苏,南京,210098
基金项目:国家高技术研究发展计划(863)项目 
摘    要:通过对苏州城市河道的调查研究发现,城市河道的浮游植物初级生产力与其它水体有明显不同。从2004年6月至2005年5月通过取样分析苏州苗家河水体浮游植物种类、数量和叶绿素a含量变化及采用黑白瓶法测定浮游植物产氧能力,结果表明:该河道氮、磷含量较高,浮游植物群落为绿藻-硅藻型,种类少,季节变化明显,水体中表层叶绿素a的含量低于底层。分析表层水体和底层水体叶绿素a的产氧能力发现,河道中浮游植物的光合产氧能力普遍较低。本文揭示了重污染河道中大量悬浮颗粒附着在浮游植物的体表,影响了浮游植物的光合产氧能力,是整个水体和底泥中的溶氧普遍较低的重要原因之一。探讨了重污染河道溶氧偏低产生黑臭的原因,为重污染河道的综合治理提供了参考。

关 键 词:重污染  城市河道  初级生产力  悬浮污物

The primary productivity in severe polluted urban river
WAN Lei,ZHU Wei.The primary productivity in severe polluted urban river[J].Ecology and Environment,2010,19(1).
Authors:WAN Lei  ZHU Wei
Abstract:According to the investigation of Suzhou urban rivers, the characteristics of primary productivity in this rivers was evi-dently different from other waterbodies. Through analysing community structure and quantity and oxygen production of phytoplank-ton in Suzhou Miaojia river from June 2004 to May 2005, Research of indicated that: this fiver had high content of nitrogen and phosphorus; community structure of phytoplankton was Chlorophyta-Diatom and category was less; seasonal change evident; chl.a in surface layer was lower than bottom layer. Comparing the diurnal change of DO in spring and summer discovered that though Chl.a of summer was more than of spring, DO of summer was less than of spring. Analysing Chl.a and the photosynthesis aerogenic ability of water of surface and bottom layer discovered that phytoplankton primary productivity in both surface and bottom layer was low. This paper also opened out that suspended granule clung to the surface of phytoplankton, which affected the ability of phytoplank-ton's photosynthesis, and made the dissolved oxygen low in the water and silt. Some feasible advice was bring forwarded to control pollution in polluted river.
Keywords:severe pollution  urban river  primary productivity  suspended contamination
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