Effects of moderate ammonium enrichment on three submersed macrophytes under contrasting light availability

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	Effects of moderate ammonium enrichment on three submersed macrophytes under contrasting light availability
	Cao, Te; Ni, Leyi; Xie, Ping; Xu, Jun; Zhang, Meng; Ni, LY (reprint author), Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China; Nily@ihb.ac.cn
刊名	FRESHWATER BIOLOGY
	2011
卷号	56 期号:8 页码:1620-1629
关键词	Carbohydrate Eutrophication Low Light Stress Nitrogen Metabolism Submersed Macrophyte
ISSN号	0046-5070
英文摘要	1. Increased ammonium concentrations and decreased light availability in a water column have been reported to adversely affect submersed vegetation in eutrophic waters worldwide. 2. We studied the chronic effects of moderate NH(4)(+) enrichment (NH(4)-N: 0.16-0.25 mg L(-1)) on the growth and carbon and nitrogen metabolism of three macrophytes (Ceratophyllum demersum, Myriophyllum spicatum and Vallisneria natans) under contrasting light availability in a 2-month experiment. 3. The NH(4)(+) enrichment greatly increased the contents of free amino acids and nitrogen in the shoot/leaf of the macrophytes. This indicates that NH(4)(+) was the dominant N source for the macrophytes. 4. Soluble carbohydrate contents remained relatively stable in the shoot/leaf of the macrophytes irrespective of the treatments. Under ambient light, the starch contents in the shoot/leaf of C. demersum and M. spicatum increased with NH(4)(+) enrichment, whereas V. natans did not exhibit any change. The starch contents decreased in C. demersum, increased in M. spicatum and remained unchanged in V. natans after the combined treatment of NH(4)(+) enrichment and reduced light. 5. The NH(4)(+) enrichment did not affect the growth of the three macrophytes under the ambient light. However, it did suppress the growth of C. demersum and M. spicatum under the reduced light. The results indicate that a moderate NH(4)(+) enrichment was not directly toxic to the macrophytes although it might change their viability in eutrophic lakes in terms of the carbon and nitrogen metabolism.
学科主题	Marine & Freshwater Biology
语种	英语
WOS记录号	WOS:000292446700013
资助机构	Study on Aquatic Ecology, Nutrient Loading and Prevention of Ecological Degradation in Lake Erhai (National High Technology Research and Development Program of China)[2008ZX07105-005]; Rapid Restoration of Submersed Vegetation in a Short-Term Phase of Clear Water in Eutrophic Lake (National Basic Research Program of China)[2008CB418105] ; Study on Aquatic Ecology, Nutrient Loading and Prevention of Ecological Degradation in Lake Erhai (National High Technology Research and Development Program of China)[2008ZX07105-005]; Rapid Restoration of Submersed Vegetation in a Short-Term Phase of Clear Water in Eutrophic Lake (National Basic Research Program of China)[2008CB418105] ; Study on Aquatic Ecology, Nutrient Loading and Prevention of Ecological Degradation in Lake Erhai (National High Technology Research and Development Program of China)[2008ZX07105-005]; Rapid Restoration of Submersed Vegetation in a Short-Term Phase of Clear Water in Eutrophic Lake (National Basic Research Program of China)[2008CB418105] ; Study on Aquatic Ecology, Nutrient Loading and Prevention of Ecological Degradation in Lake Erhai (National High Technology Research and Development Program of China)[2008ZX07105-005]; Rapid Restoration of Submersed Vegetation in a Short-Term Phase of Clear Water in Eutrophic Lake (National Basic Research Program of China)[2008CB418105]
公开日期	2011-11-09
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/16287]
专题	水生生物研究所_淡水生态学研究中心_期刊论文
通讯作者	Ni, LY (reprint author), Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China; Nily@ihb.ac.cn
推荐引用方式 GB/T 7714	Cao, Te,Ni, Leyi,Xie, Ping,et al. Effects of moderate ammonium enrichment on three submersed macrophytes under contrasting light availability[J]. FRESHWATER BIOLOGY,2011,56(8):1620-1629.
APA	Cao, Te.,Ni, Leyi.,Xie, Ping.,Xu, Jun.,Zhang, Meng.,...&Nily@ihb.ac.cn.(2011).Effects of moderate ammonium enrichment on three submersed macrophytes under contrasting light availability.FRESHWATER BIOLOGY,56(8),1620-1629.
MLA	Cao, Te,et al."Effects of moderate ammonium enrichment on three submersed macrophytes under contrasting light availability".FRESHWATER BIOLOGY 56.8(2011):1620-1629.