【摘要】 在文献综述的基础上,说明了锡林河流域草原中小叶锦鸡儿分布增加的趋势,认为在过度放牧引起草原退化、甚至荒漠化(沙化)发生的情况下,小叶锦鸡儿分布的增加首先与其生物-生态学特性和生活史特征有密切关系,同时也与放牧引起的系统物理环境的改变有关,最终可能形成以小叶锦鸡儿为优势种的灌丛化牧场或沙丘灌丛地。更多还原

【Abstract】 Based on reviewing the related literature, increased distribution of Caragana microphylla in rangelands in Xilin River Basin is explicated. It is concluded that this situation is related firmly to the bioecology and life history characteristics of Caragana microphylla, and also to the modification of physical environment of ecosystems under overgrazing that results in the rangeland degradation or even in desertification. The consequence of this change is the formation of thicketizationrangeland or thicketduneland.更多还原