| Effect of enclosure and nutrient enrichment on Microcystis blooms in Donghu Lake |
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| 作者姓名： | 唐汇娟 谢平 谢丽强 陈非洲 |
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| 作者单位： | School of Animal Science South China Agricultural University Guangzhou 510640 China，Donghu Experimental Station of Lake Ecosystems Institute of Hydrobiology The Chinese Academy of Sciences Wuhan 430072 China，Donghu Experimental Station of Lake Ecosystems Institute of Hydrobiology The Chinese Academy of Sciences Wuhan 430072 China，Donghu Experimental Station of Lake Ecosystems Institute of Hydrobiology The Chinese Academy of Sciences Wuhan 430072 China |
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| 基金项目： | Supported by a key project of the Chinese Academy of Sciences (No. KZCX1-SW-12) and by Foundation of South China Agricultural Univer-sity for Doctors (No. 4300-K05108). |
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| 摘 要： | 1 INTRODUCTION Surface blooms of nuisance cyanobacteria are often a signal of eutrophication (Jacoby et al., 2000). They are generally favored by conditions of low nitrogen to phosphorus ratios, high total phosphorus content, high water temperature, high …
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| 关 键 词： | 氮 磷 东湖 营养富集 |
| 收稿时间： | 2005-06-07 |
| 修稿时间： | 2006-04-25 |
Effect of enclosure and nutrient enrichment onMicrocystis blooms in Donghu Lake |
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| Tang Huijuan,Xie Ping,Xie Liqiang,Chen Feizhou.Effect of enclosure and nutrient enrichment on Microcystis blooms in Donghu Lake[J].Chinese Journal of Oceanology and Limnology,2006,24(3):278-284. |
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| Authors: | Tang Huijuan Xie Ping Xie Liqiang Chen Feizhou |
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| Institution: | (1) School of Animal Science, South China Agricultural University, 510640 Guangzhou, China;(2) Donghu Experimental Station of Lake Ecosystems, Institute of Hydrobiology, The Chinese Academy of Sciences, 430072 Wuhan, China |
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| Abstract: | A nutrient enrichment experiment was conductedin situ in Donghu Lake (30°33'N, 114°23'E), a shallow hypereutrophic lake in Hubei, China through an enclosure(each 2.5×2.5m by 2
m depth) method from July 15 to September 21, 2000. Three duplicated groups, including two treatments and one control, were
designed as unfertilized control (C), nitrogen enrichment (N) and phosphorus enrichment (P), and were also compared with neighboring
lake water. DenseMicrocystis bloom exclusively dominated in all the enclosures, while no bloom was observed in the lake. All the enclosures had much higher
phytoplankton biomass, higher pH values, and higher transparency than the surrounding lake water. Neither nitrogen nor phosphorus
addition had significant effect on phytoplankton composition and biomass due to very high nutrient concentration in the lake
water. Suitable biological (absence of filter-feeding silver carp and bighead carp) and physical environment (high transparency,
high stability and high pH) associate with saturated nutrient concentration contribute to the nuisanceMicrocystis bloom in the enclosures.
Supported by a key project of the Chinese Academy of Sciences (No. KZCXI-SW-12) and by Foundation of South China Agricultural
University for Doctors (No. 4300-K05108). |
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| Keywords: | Microcystis bloom nitrogen phosphorus enclosure |
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