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题名: Adaptation of submerged macrophytes to both water depth and flood intensity as revealed by their mechanical resistance
作者: Zhu, Guorong1, 2; Li, Wei1, 2; Zhang, Meng3; Ni, Leyi1; Wang, Shengrui4
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.
关键词: Flood ; Water depth ; Plant growth ; Root anchorage strength ; Stem tensile properties ; Submerged aquatic vegetation (SAV)
刊名: HYDROBIOLOGIA
发表日期: 2012-10-01
DOI: 10.1007/s10750-012-1185-y
卷: 696, 期:1, 页:77-93
收录类别: SCI
文章类型: Article
部门归属: [Zhu, Guorong; Li, Wei; Ni, Leyi] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China; [Zhu, Guorong; Li, Wei] Chinese Acad Sci, Grad Univ, Wuhan, Hubei, Peoples R China; [Zhang, Meng] Jiangxi Acad Environm Sci, Nanchang 330029, Peoples R China; [Wang, Shengrui] Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: project "Core Technology and Model Project for Environmental and Ecological Improvement of Erhai" (National High Technology Research and Development Program of China) [2012ZX07105004, 2008ZX07101-013]
类目[WOS]: Marine & Freshwater Biology
研究领域[WOS]: Marine & Freshwater Biology
摘要: Little is known about the mechanical resistance response of submerged macrophytes to floods. An experiment was conducted to investigate the plant growth, root anchorage strength, and stem tensile properties of five submerged macrophytes under three initial water levels (1.0, 2.5, and 4.0 m) with four water level fluctuation speeds (0, 5, 15, and 25 cm d(-1)). Our results demonstrate that the biomass, relative growth rate, root anchorage strength, and stem tensile properties of the five species decreased with increasing initial water level, suggesting that deep water can inhibit plant growth and decrease their mechanical resistance. Floods weakened the stem tensile properties and strengthened the root performances of Myriophyllum spicatum, Hydrilla verticillata, and Potamogeton malaianus in shallow water. However, floods induced opposite mechanical resistance responses from plants in deep water, indicating a possible trade-off between stem breakage and uprooting under flooding conditions. M. spicatum, Ceratophyllum demersum, and P. malaianus were more tolerant of deep water and flood intensity than Potamogeton maackianus and H. verticillata, as indicated by their larger biomass, plant heights, stem tensile properties, and root anchorage strength. This is the first article that mechanically explains the competitive capability and survival potential of submerged macrophytes to water depth and flood intensity.
英文摘要: Little is known about the mechanical resistance response of submerged macrophytes to floods. An experiment was conducted to investigate the plant growth, root anchorage strength, and stem tensile properties of five submerged macrophytes under three initial water levels (1.0, 2.5, and 4.0 m) with four water level fluctuation speeds (0, 5, 15, and 25 cm d(-1)). Our results demonstrate that the biomass, relative growth rate, root anchorage strength, and stem tensile properties of the five species decreased with increasing initial water level, suggesting that deep water can inhibit plant growth and decrease their mechanical resistance. Floods weakened the stem tensile properties and strengthened the root performances of Myriophyllum spicatum, Hydrilla verticillata, and Potamogeton malaianus in shallow water. However, floods induced opposite mechanical resistance responses from plants in deep water, indicating a possible trade-off between stem breakage and uprooting under flooding conditions. M. spicatum, Ceratophyllum demersum, and P. malaianus were more tolerant of deep water and flood intensity than Potamogeton maackianus and H. verticillata, as indicated by their larger biomass, plant heights, stem tensile properties, and root anchorage strength. This is the first article that mechanically explains the competitive capability and survival potential of submerged macrophytes to water depth and flood intensity.
关键词[WOS]: PLANT COMMUNITY STRUCTURE ; WHEAT TRITICUM-AESTIVUM ; AQUATIC MACROPHYTES ; MYRIOPHYLLUM-SPICATUM ; PLASTIC RESPONSES ; HYDRAULIC FORCES ; MAXIMUM DEPTH ; SHALLOW LAKES ; MOVING WATER ; LIGHT
语种: 英语
WOS记录号: WOS:000307533000005
ISSN号: 0018-8158
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/17220
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.Chinese Acad Sci, Grad Univ, Wuhan, Hubei, Peoples R China
3.Jiangxi Acad Environm Sci, Nanchang 330029, Peoples R China
4.Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China

Recommended Citation:
Zhu, Guorong; Li, Wei; Zhang, Meng; Ni, Leyi; Wang, Shengrui.Adaptation of submerged macrophytes to both water depth and flood intensity as revealed by their mechanical resistance,HYDROBIOLOGIA,2012,696(1):77-93
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