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草业学报  2015 

牧压梯度上呼伦贝尔典型草原植物群落学特征

DOI: 10.11686/cyxb20150121, PP. 176-182

Keywords: 法瑞学派,功能群,植被社会学,克氏针茅草原

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Abstract:

植物群落学分析以演绎式的生态解释转向归纳式的实验研究。本文运用法瑞学派(Braun-Blanquet)调查分析和群落功能群分类方法,通过比较内蒙古呼伦贝尔克氏针茅草原不同放牧梯度上群落组成结构、特征种及群丛单位的变化,阐明群落物种组合规律。结果显示:根据Braun-Blanquet存在度/盖度等级的划分,得到两个主要群丛及下属两个亚群丛;随着放牧强度的增强,葱属植物等耐牧、耐旱物种出现频度显著增加,适口性好、耐牧能力弱的物种出现频度降低甚至消失;群落科构成和功能群类型在牧压梯度上呈现不同的变化特征,群落物种数和多样性指数具有显著差异。

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