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题名: Fertile sediment and ammonium enrichment decrease the growth and biomechanical strength of submersed macrophyte Myriophyllum spicatum in an experiment
作者: Zhu, Guorong1, 2; Cao, Te1; Zhang, Meng3; Ni, Leyi1; Zhang, Xiaolin1
通讯作者: Cao, T (reprint author), 7 Donghu South Rd, Wuhan, Hubei, Peoples R China.
关键词: Ammonium enrichment ; Eutrophication ; Biomechanical properties ; Myriophyllum spicatum ; Nonstructure carbohydrate
刊名: HYDROBIOLOGIA
发表日期: 2014-04-01
DOI: 10.1007/s10750-013-1792-2
卷: 727, 期:1, 页:109-120
收录类别: SCI
文章类型: Article
部门归属: [Zhu, Guorong ; Cao, Te ; Ni, Leyi ; Zhang, Xiaolin] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China ; [Zhu, Guorong] Henan Normal Univ, Coll Fisheries, Xinxiang 453007, Peoples R China ; [Zhang, Meng] Jiangxi Acad Environm Sci, Nanchang 330029, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National High Technology Research and the Development Program of China [2012ZX07105-004]; National Natural Science Foundation of China [31270508, 41230853]
类目[WOS]: Marine & Freshwater Biology
研究领域[WOS]: Marine & Freshwater Biology
摘要: Decline of submersed macrophytes has occurred in eutrophic lakes worldwide. Little is known about effects of nutrient enrichment on biomechanical properties of submersed macrophytes. In a 30-day experiment, Myriophyllum spicatum was cultured in aquaria containing two types of sediment (mesotrophic clay vs. fertile loam) with contrasting water NH4 (+) concentrations (0 vs. 3.0 mg L-1 NH4-N). The plant growth, shoot and root morphology, stem biomechanical properties, and stem total nonstructure carbohydrates content (TNC) were examined. The NH4 (+)-enriched water, particularly combined with the fertile sediment, caused adverse effects on M. spicatum as indicated by reductions in the growth, stem biomechanical properties (tensile force, bending force and structural stiffness), and TNC content. These results indicate that increased sediment fertility and water NH4 (+)-enrichment made the plant more fragile and vulnerable to hydraulic damage, particularly for the upper stem, implying that M. spicatum was prone to uprooting and fracture by hydraulic force, and the broken fragment from parent shoot of M. spicatum might have low-survival potential due to its low-TNC content. This may be a mechanical aspect for the decline of submersed macrophytes and makes it more difficult to restore submersed vegetation in the eutrophic lakes.
英文摘要: Decline of submersed macrophytes has occurred in eutrophic lakes worldwide. Little is known about effects of nutrient enrichment on biomechanical properties of submersed macrophytes. In a 30-day experiment, Myriophyllum spicatum was cultured in aquaria containing two types of sediment (mesotrophic clay vs. fertile loam) with contrasting water NH4 (+) concentrations (0 vs. 3.0 mg L-1 NH4-N). The plant growth, shoot and root morphology, stem biomechanical properties, and stem total nonstructure carbohydrates content (TNC) were examined. The NH4 (+)-enriched water, particularly combined with the fertile sediment, caused adverse effects on M. spicatum as indicated by reductions in the growth, stem biomechanical properties (tensile force, bending force and structural stiffness), and TNC content. These results indicate that increased sediment fertility and water NH4 (+)-enrichment made the plant more fragile and vulnerable to hydraulic damage, particularly for the upper stem, implying that M. spicatum was prone to uprooting and fracture by hydraulic force, and the broken fragment from parent shoot of M. spicatum might have low-survival potential due to its low-TNC content. This may be a mechanical aspect for the decline of submersed macrophytes and makes it more difficult to restore submersed vegetation in the eutrophic lakes.
关键词[WOS]: LIGHT AVAILABILITY ; AQUATIC PLANTS ; MECHANICAL RESISTANCE ; VALLISNERIA-NATANS ; HYDRAULIC FORCES ; SHALLOW LAKES ; STRESS ; WATER ; MORPHOLOGY ; RESPONSES
语种: 英语
WOS记录号: WOS:000330967900008
ISSN号: 0018-8158
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/20018
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China
2.Henan Normal Univ, Coll Fisheries, Xinxiang 453007, Peoples R China
3.Jiangxi Acad Environm Sci, Nanchang 330029, Peoples R China

Recommended Citation:
Zhu, Guorong; Cao, Te; Zhang, Meng; Ni, Leyi; Zhang, Xiaolin.Fertile sediment and ammonium enrichment decrease the growth and biomechanical strength of submersed macrophyte Myriophyllum spicatum in an experiment,HYDROBIOLOGIA,2014,727(1):109-120
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