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湖泊科学  2015 

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

DOI: 10.18307/2015.0309

Keywords: 功能性状,变异,生态尺度,个体发育,沉水植物,微齿眼子菜

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Abstract:

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(Potamogetonmaackianus)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.

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