Fertile sediment and ammonium enrichment decrease the growth and biomechanical strength of submersed macrophyte Myriophyllum spicatum in an experiment

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	Fertile sediment and ammonium enrichment decrease the growth and biomechanical strength of submersed macrophyte Myriophyllum spicatum in an experiment
	Zhu, Guorong 1,2; Cao, Te 1; Zhang, Meng 3; Ni, Leyi 1; Zhang, Xiaolin 1
刊名	HYDROBIOLOGIA
	2014-04-01
卷号	727 期号:1 页码:109-120
关键词	Ammonium enrichment Eutrophication Biomechanical properties Myriophyllum spicatum Nonstructure carbohydrate
ISSN号	0018-8158
通讯作者	Cao, T (reprint author), 7 Donghu South Rd, Wuhan, Hubei, Peoples R China.
中文摘要	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.
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.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Marine & Freshwater Biology
研究领域[WOS]	Marine & Freshwater Biology
关键词[WOS]	LIGHT AVAILABILITY ; AQUATIC PLANTS ; MECHANICAL RESISTANCE ; VALLISNERIA-NATANS ; HYDRAULIC FORCES ; SHALLOW LAKES ; STRESS ; WATER ; MORPHOLOGY ; RESPONSES
收录类别	SCI
资助信息	National High Technology Research and the Development Program of China [2012ZX07105-004]; National Natural Science Foundation of China [31270508, 41230853]
语种	英语
WOS记录号	WOS:000330967900008
公开日期	2014-08-07
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/20018]
专题	水生生物研究所_淡水生态学研究中心_期刊论文
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
推荐引用方式 GB/T 7714	Zhu, Guorong,Cao, Te,Zhang, Meng,et al. Fertile sediment and ammonium enrichment decrease the growth and biomechanical strength of submersed macrophyte Myriophyllum spicatum in an experiment[J]. HYDROBIOLOGIA,2014,727(1):109-120.
APA	Zhu, Guorong,Cao, Te,Zhang, Meng,Ni, Leyi,&Zhang, Xiaolin.(2014).Fertile sediment and ammonium enrichment decrease the growth and biomechanical strength of submersed macrophyte Myriophyllum spicatum in an experiment.HYDROBIOLOGIA,727(1),109-120.
MLA	Zhu, Guorong,et al."Fertile sediment and ammonium enrichment decrease the growth and biomechanical strength of submersed macrophyte Myriophyllum spicatum in an experiment".HYDROBIOLOGIA 727.1(2014):109-120.