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题名: Associations between the morphology and biomechanical properties of submerged macrophytes: implications for its survival and distribution in Lake Erhai
作者: Zhu, Guorong1, 2; Zhang, Meng3; Cao, Te1; Ni, Leyi1
关键词: Hydraulic forces ; Spatial distribution ; Biomechanical properties ; Trade-off ; Vallisneria natans
刊名: ENVIRONMENTAL EARTH SCIENCES
发表日期: 2015-09-01
DOI: 10.1007/s12665-015-4267-0
卷: 74, 期:5, 页:3907-3916
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]: Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
研究领域[WOS]: Environmental Sciences & Ecology ; Geology ; Water Resources
英文摘要: Submerged macrophytes mainly distribute in the wind-protected littoral zones, rather than continuously distribute around the lake due to mechanical damage by strong wave. However, it is unknown how the biomechanical properties, the key targets against mechanical stress, contribute to its survival and distribution in natural aquatic ecosystem. In this study, the distribution, plant growth, and leaf biomechanical and morphological traits of different segments of Vallisneria natans were examined at 25 sites with three wind strength [sites exposed to strong ES wind (HW), sites exposed to moderate ES wind (MW) and sites sheltered by lakeshore with weak wind disturbance], in Lake Erhai, of Yunnan Province, China. Results showed that V. natans mainly distributed in the wind-protected eastern and northern littoral zones within 5 m water depth. The smallest plant growth, strongest and least flexible leaves were at MW, indicating that V. natans is prone to dominate the littoral zones exposed to strong but short wave. Additionally, the high plant growth and relatively stronger and less flexible leaves at HW suggested that the maximization of photosynthesis was at the cost of reduced biomechanical properties and increased drag forces from similar waves, which were unfavourable to complete their life cycles and ultimately reduce the survival and distribution of V. natans under strong wave disturbance. The significant associations between the biomechanical and morphological traits may trigger trade-offs between the mechanical resistance and other plant functions, such as photosynthesis, ultimately determining survival and distribution of submerged macrophytes in natural aquatic ecosystems.
关键词[WOS]: INCREASED WATER-LEVEL ; AQUATIC PLANTS ; PHENOTYPIC PLASTICITY ; MECHANICAL RESISTANCE ; HYDRAULIC FORCES ; SHALLOW LAKES ; SEDIMENT TYPE ; MOVING WATER ; VEGETATION ; DEPTH
语种: 英语
WOS记录号: WOS:000360401400022
ISSN号: 1866-6280
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27170
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
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