摘要
用x2检验和Jaccard指数对山西白羊草群落19个优势种种间联结性进行了分析,检验了种间相关关系。结果表明,白羊草群落优势种整体上多呈现正关联,群落处在较稳定的演替阶段,各种间关系随群落类型和生境的变化而发生变化,并可反映一定的发展趋势。对生境要求相同或相似的种对在适合其生存的生境中表现出显著的正关联。关健词:白羊草群落;种间联结;x2检验;
Interspecific relationships of 19 dominant species in Bothriochloa ischaemum community were studied using x2 correction test and Jaccard index. The results showed that the overall associations among dominant species in Bothriochloa ischaemum community were positive, and the relationships among speciespairs were varied with environmental conditions in different types of community, reflecting a certain trend of community succession. Species with positive associations had similar biological characteristics and similar habitat demand.
出处
《草业学报》
CSCD
2003年第2期14-19,共6页
Acta Prataculturae Sinica
基金
国家自然科学基金(No.30070140)资助。
关键词
白羊草群落
种间联结性
优势种
生境
Bothriochloa ischaemum community
interspecific association
x^2 correction test
Jaccard index
