东阿拉善沙冬青及周边群落种间关联性研究
Interspecific Associations Between Ammopiptanthus mongolicus and Surrounding Communities in Eastern Alxa
基于野外调查的基本数据,应用方差比率法、χ²检验、Pearson相关检验和Spearman秩相关检验等方法,对沙冬青群落33个主要物种间的关联性进行分析,研究东阿拉善荒漠区沙冬青与其他植物的种间关系。结果表明:沙冬青群落总体上呈显著正联结的关系,群落处于相对稳定状态;χ2检验、Pearson相关系数检验和Spearman秩相关系数检验的显著率分别为23.48%、7.01%和22.35%,显著正关联的种对大于显著负关联的种对,但大部分种对间联结性较为松散。建群种沙冬青与灌木层常见种霸王呈显著正关联,与草本植物砂蓝刺头和猪毛蒿呈显著负关联。
Based on the basic data from field investigations, methods including the variance ratio (VR) method, χ² test, Pearson correlation test, and Spearman's rank correlation test are applied to analyze the interspecific associations among 33 main species in the Ammopiptanthus mongolicus community to study the interspecific relationship between A. mongolicus and other plants in the desert area of eastern Alxa. The results show that the A. mongolicus community generally exhibits a significant positive association, indicating that the community is in a relatively stable state. The significance rates of the χ² test, Pearson correlation coefficient test, and Spearman's rank correlation coefficient test are 23.48%, 7.01%, and 22.35% respectively. The number of species pairs with significant positive associations is greater than that with significant negative associations, but the associations between most species pairs are relatively loose. The constructive species A. mongolicus shows a significant positive association with Zygophyllum xanthoxylon (a common species in the shrub layers), while it exhibits significant negative associations with herbaceous plants Echinops gmelinii and Artemisia scoparia.
eastern Alxa / Ammopiptanthus mongolicus community / interspecific association
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