Effect of enclosure and nutrient enrichment on Microcystis blooms in Donghu Lake

TANG Huijuan; XIE Ping; XIE Liqiang; CHEN Feizhou

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Effect of enclosure and nutrient enrichment on Microcystis blooms in Donghu Lake

机译：围封和养分富集对东湖微囊藻开花的影响

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A nutrient enrichment experiment was conducted in 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. Dense Microcystis 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 nuisance Microcystis bloom in the enclosures.

机译：从7月开始在中国湖北浅水富营养化湖东湖（30°33'N，114°23'E）进行了营养富集试验，该方法采用围封法（每个2.5×2.5m，深度2 m） 2000年9月15日至9月21日。将三个重复的组（包括两个处理和一个对照组）设计为未受精对照（C），氮富集（N）和磷富集（P），并与附近的湖水进行比较。在所有围栏中，密集的微囊藻大量开花，而在湖泊中未观察到开花。与围湖水相比，所有围堰的浮游生物量更高，pH值更高，透明度更高。由于湖水中养分浓度很高，因此氮和磷的添加对浮游植物的组成和生物量均无显着影响。适当的生物（无滤食性silver鱼和big鱼）和物理环境（高透明度，高稳定性和高pH）与饱和营养物浓度有关，会造成箱体内微囊藻的滋生。

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来源
《中国海洋湖沼学报（英文版）》 |2006年第3期|278-284|共7页
作者
TANG Huijuan; XIE Ping; XIE Liqiang; CHEN Feizhou;
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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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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 chi
中图分类地球物理学;
关键词
Microcystis bloom; nitrogen; phosphorus; enclosure;

机译：微囊藻开花;氮;磷;封闭;

Effect of enclosure and nutrient enrichment on Microcystis blooms in Donghu Lake

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