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冰川冻土  2012 

天山乌鲁木齐河源1号冰川退缩地植物群落演替规律及机理研究

, PP. 1134-1141

Keywords: 1号冰川,冰川退缩地,植物群落,演替

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Abstract:

以空间代时间的方法,研究了天山乌鲁木齐河源1号冰川退缩地植物群落的演替.结果表明,1号冰川退缩地现代冰期冰碛物上共出现被子植物15科50种,以菊科、禾本科、石竹科和莎草科为主.植物群落演替可明显分为4个阶段,并且表现出菊科→石竹科→禾本科→莎草科的基本演替规律.在时间序列上,物种数、物种丰富度、物种个体数、多样性指数和群落盖度等重要值都与演替时间呈显著正相关.该区域内植物种的分布主要受风力种子传播驱动,种子小而多、易于通过风力传播、且株型低矮抗逆性强的植物种类优先出现,而土壤发育程度则是植物群落演替的直接决定因素.

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