摘要：

富营养化水体流经北运河下游天然湿地后,水质由重度富营养向中度富营养状态转变。水质检测结合荧光原位杂交(FISH)菌种识别技术结果表明,天然湿地对氮的去除除了生物吸收外,硝化-反硝化也是重要途径。对磷主要由生物吸收及底泥吸附截留去除。对叶绿素a的去除归因于挺水植物遮蔽阳光,并与藻类竞争营养物质而限制了藻类生长。最后建议夏、秋季采取曝气等人工强化措施,以提高天然湿地的水质稳定效果。

关键词: 天然湿地, 富营养化, 叶绿素a, 荧光原位杂交

Abstract:

When the eutrophic water flows over natural wetland via the North Canal downstream,the water quality is changed from severe eutrophication state toward moderate eutrophication state.After water quality detection has been combined with fluorescence in situ hybridization(FISH),the results indicates that the nitrogen removal is mainly due to the uptake of biology and the nitrification-denitrification reaction of microorganisms is another important pathway,too.The phosphorus removal is mainly due to the absorption of biology and the interception and adsorption of the sediment.The chloropyll-a removal is due to the sunlight sheltered by the emergent aquatic plant,and meanwhile the emergent aquatic plant contends for nutrients.Therefore,the growth of algae is restrained.At the end,it is suggested that reinforced artificial aeration should be used in natural wetland in spring and autumn,in order to improve the efficacy of the stability of water quality in natural wetland.

Key words: natural wetland, eutrophication, chlorophyll-a, fluorescence in situ hybridization

中图分类号: 

• X832