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中文摘要：
基于国际冻原计划（ITEX）模拟增温效应对植物影响的研究方法,设置温度梯度从物种个体水平研究各功能群主要植物种生长特征与地温的相关性,旨在探讨全球变暖背景下,矮嵩草草甸各功能群植物种生长特征对地温升高的响应。结果表明：莎草科功能群植物黑褐苔草（Carex alrofusca）的高度与地温呈线性关系（P〈0.01）,而分蘖数、叶片数与地温呈二次函数关系,但不显著;矮嵩草（Kobresia humilis）的分蘖数、叶片数及高度与地温均呈二次函数形式变化（P〈0.05）。禾本科功能群植物垂穗披碱草（Elymus nutans）和草地早熟禾（Poa pratensis）的分蘖数、叶片数、高度均与地温呈线性正相关关系（P〈0.01）。杂类草功能群植物短穗兔耳草（Lagotis brachystachya）的匍匐茎数与地温呈二次函数关系,但不显著,而其叶片数、高度均与地温呈线性相关关系（P〈0.01）;鸟足毛茛（Ranunculus brotherusii）的花蕾数、叶片数、高度均与地温均呈线性相关关系（P〈0.01）。综上表明,不同功能群植物种对地温升高的响应是不一致的,如果地温持续升高对禾本科功能群植物种的生长有利,而对莎草科和杂类草功能群植物种均不利。
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