富营养化湖泊刚毛藻建群特征及其影响因素

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Abstract In order to study the Cladophora community characteristics and the factors influenced the process in eutrophic lakes, the marble plates were placed in the depth of 5, 25, 45, 65, 85cm in coastal of Caohai Lake used for the measurement of the biomass of Cladophora community, the length of Cladophora and the density and composition of attached diatom. After two weeks, the biggest biomass of Cladophora community was 9.0mg/cm² at underwater 25cm. Four weeks later, the biggest biomass of the Cladophora community was 14.0mg/cm² at underwater 5cm, which was 1.62 times that of the Cladophora community underwater 25cm. During the experiment, the Cladophora community biomass at 65cm and 85cm were 2.86mg/cm² and 1.39mg/cm², respectively, which are less than those of other depth of water. The longest length of the Cladophora filaments was 11.8cm at the depth of 5cm. At the 6^th week, the biggest density of attached diatoms community was 7.8×10⁶ cells/cm² at the depth of 5cm. Statistical analysis indicated that the characteristics of Cladophora community were significantly affected by NH₄⁺-N concentration, underwater light intensity and SRP concentration, and species composition of attached diatom were significantly affected by NH₄⁺-N concentration and pH value.

Key words： eutrophication Cladophora community water depth

Received: 12 May 2017

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	GUO Liang-liang
	LI Lu
	LI Li-jie
	LI Dun-hai
	LI Gen-bao

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GUO Liang-liang,LI Lu,LI Li-jie等. The characteristics of Cladophora community and its influencing factors in a eutrophic lake[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(12): 4667-4674.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I12/4667

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