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塔里木河流域胡杨种群自然更新状况的种群生态学分析
Authors
刘国军
吴俊侠
+3 more
张希明
李利
邓潮州
Publication date
20 October 2010
Publisher
Abstract
通过样地调查和数据统计,对塔里木河流域不同生境内胡杨种群的径级结构、年龄结构、生命表及存活曲线进行了比较分析。同时,使用种群动态量化方法定量的分析了胡杨种群数量的动态变化。结果表明,由于生境条件的不同,胡杨种群结构存在着差异性,尤其是下游胡杨种群与上、中游种群的差异性较大。上、中游胡杨种群的幼苗丰富,种群径级大小、年龄结构均呈金字塔型,存活曲线符合DeeveyC(凹)型,且其动态指数均大于0,为增长型种群;而下游胡杨种群的幼林株数(10 a以内)较少,长势较差,出现很多枯死幼树,种群结构属于中部大,两端小的偏正态分布,存活曲线呈现凸型,且其动态指数小于0,为衰退型种群
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Institutional Repository of Xinjiang Institute of Ecology and Geography, CAS
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Last time updated on 29/11/2016