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学科主题: Marine & Freshwater Biology
题名: Effects of moderate ammonium enrichment on three submersed macrophytes under contrasting light availability
作者: Cao, Te ; Ni, Leyi ; Xie, Ping ; Xu, Jun ; Zhang, Meng
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
关键词: carbohydrate ; eutrophication ; low light stress ; nitrogen metabolism ; submersed macrophyte
刊名: FRESHWATER BIOLOGY
发表日期: 2011
卷: 56, 期:8, 页:1620-1629
收录类别: SCI
部门归属: [Cao, T; Ni, LY; Xie, P; Xu, J] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China; [Zhang, M] Jiangxi Acad Environm Sci, Nanchang, Peoples R China
资助者: 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]
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.
语种: 英语
WOS记录号: WOS:000292446700013
ISSN号: 0046-5070
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/16287
Appears in Collections:淡水生态学研究中心_期刊论文

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Recommended Citation:
Cao, Te; Ni, Leyi; Xie, Ping; Xu, Jun; Zhang, Meng.Effects of moderate ammonium enrichment on three submersed macrophytes under contrasting light availability,FRESHWATER BIOLOGY,2011,56(8):1620-1629
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