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引用本文:潘继征,李文朝,陈开宁.滇池东北岸生态修复区的环境效应——Ⅰ.抑藻效应.湖泊科学,2004,16(2):142-149. DOI:10.18307/2004.0207
PAN Jizheng,LI Wenchao,CHEN Kaining.A Study on the Environmental Effect in the Zone of Restoration of Aquatic Plants Covered at the Northeast of Dianchi Lake: I. The Effect on the Controlling of Alga Blooming. J. Lake Sci.2004,16(2):142-149. DOI:10.18307/2004.0207
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滇池东北岸生态修复区的环境效应——Ⅰ.抑藻效应
潘继征, 李文朝, 陈开宁
中国科学院南京地理与湖泊研究所, 南京 210008
摘要:
研究了滇池东北沿岸带生态修复区抑制蓝藻水华的功能,对比监测了修复区内外水体中chl.a浓度,通过原位围隔试验研究了修复区内聚集藻类的降解过程,测定了水生植被的遮光率及其对藻类光合作用的影响。结果显示,修复区具有捕获富集和分解消除漂浮性蓝藻的作用,同时能通过水生植物的遮荫作用抑制藻类光合作用。在蓝藻水华暴发期(7-10月)修复区内蓝藻大量聚集,chl.a最高浓度达到修复区外的29倍;聚集在修复区内的藻类在微生物作用下迅速降解,chl.a降解过程符合一级反应动力学方程,反应系数为k=0.2173(时间单位为天);修复区内挺水植被的遮光率可以达到90%以上,能降低植被区内水体中藻类光合作用强度60%左右。
关键词:  滇池  沿岸带  生态修复  抑藻效应
DOI:10.18307/2004.0207
分类号:
基金项目:科技部重大项目"滇池污染治理技术研究"(K99-05-35-01)资助
A Study on the Environmental Effect in the Zone of Restoration of Aquatic Plants Covered at the Northeast of Dianchi Lake: I. The Effect on the Controlling of Alga Blooming
PAN Jizheng, LI Wenchao, CHEN Kaining
Nanjng Institute of Geogrephy and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
Abstract:
This paper mainly deals with the effect of the alga blooming controlled in the restoration zone covered by aquatic plants in the northeast of Dianchi Lake.The restoration mainly combined with the communities of Typha orientalis Presl., Typha angustifolia L.Zizania latifolia Turcz,, Phragmitis communis Trin,, P.malaianus Miq., and Myriophyllum spicatum L.Comparing the concentration of Chi.a of the restoration zone with the control's,the process of the changing of the alga with the enclosing test was analyzed.The result showed that the restoration zone had a high efficiency of algae enriching.The concentration of Chi.a in the side of the zone was about as 29 times as the control during the alga blooming.In certain time (from Jul.to Oct., 2003), the efficiency of the treatment for the concentration of Chi.a can be more than 90%.From the research, we found that the decomposing process of the alga during the alga blooming accord with the kinetic equation of the first grade with the coefficient k=0.2173, and the ability of the treatment for the alga can get 3.7kg/m3 in the restoration zone.At the same time, the efficiency of shading light of the emergent plant in the restoration zone can be more than 90%, and the photosynthesis rate of the alga also decreased about 60%.
Key words:  Dianchi Lake  aquatic plants  ecological restoration  effect of controlling algal
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