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引用本文:符辉,钟家有,袁桂香,曹特,倪乐意.沉水植物功能性状变异的来源与结构以微齿眼子菜(Potamogetonmaackianus)为例.湖泊科学,2015,27(3):429-435. DOI:10.18307/2015.0309
FU Hui,ZHONG Jiayou,YUAN Guixiang,CAO Te,NI Leyi.Sources and structures of functional traits variations in submersed macrophytes:A case of Potamogeton maackianus. J. Lake Sci.2015,27(3):429-435. DOI:10.18307/2015.0309
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沉水植物功能性状变异的来源与结构以微齿眼子菜(Potamogetonmaackianus)为例
符辉1,2, 钟家有1, 袁桂香1, 曹特2, 倪乐意2
1.江西省水利科学研究院, 江西省鄱阳湖水资源与环境重点实验室, 南昌 330029;2.中国科学院水生生物研究所, 东湖湖泊生态系统试验站, 淡水生态与生物技术国家重点实验室, 武汉 430072
摘要:
植物功能性状的变异不仅受到物种个体发育的影响,还因环境而变化.以沉水植物微齿眼子菜(Potamogeton maackianus)为例,设计了5个生态尺度(依次为湖泊、样带、样点、样方、个体),测定了681株个体的11个功能性状,分析其变异的来源与结构.结果表明:1)微齿眼子菜功能性状的种内变异为0.40~1.21;2)5个生态尺度均对这些功能性状具有显著影响,但特定生态尺度的影响程度与功能性状的选择有关.个体尺度的变异构成了这些功能性状变异的主要来源,而湖泊、样带、样点尺度是茎重和节间数变异的主要组成部分;3)个体发育引起的变异约占总变异的5%~76%,且在各生态尺度均占一定比例,说明这部分变异同样是我们研究或者设计实验过程中不可忽视的因素.
关键词:  功能性状  变异  生态尺度  个体发育  沉水植物  微齿眼子菜
DOI:10.18307/2015.0309
分类号:
基金项目:国家自然科学基金青年基金项目(31300398,31400404)资助.
Sources and structures of functional traits variations in submersed macrophytes:A case of Potamogeton maackianus
FU Hui1,2, ZHONG Jiayou1, YUAN Guixiang1, CAO Te2, NI Leyi2
1.Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, P.R.China;2.State Key Laboratory of Freshwater Ecology and Biotechnology, Donghu Experimental Station of Lake Ecosystems, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P.R.China
Abstract:
Functional traits variations are not only constrained by ontogeny but also affected by specific environmental factors.In this paper, the sources and structures of 11 functional traits in a macrophyte species Potamogeton maackianus are studied.We measured these traits from 681 individuals across five ecological scales:lake, transect, sample depth, sample area and individual.The results showed that:1) A great high trait variation (0.40-1.21) was observed within species.2) The five ecological scales had a great influence on the structures of trait variations, depending on the selected specific trait.These measured traits were most responsive to individual scale, while stem mass and internode number were largely affected by environmental factors at scales of lake, transect and depth stratus.3) Ontogenetic variance of these traits ranged from 5% to 76%, and was non-negligible at each ecological scale.
Key words:  Functional traits  variance  ecological scale  ontogeny  submersed macrophytes  Potamogeton maackianus
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