砒砂岩地区中国沙棘群落种间联结性分析

Analysis of the Interspecific Association with Hippophae rhamniodes Community in Pisha Rock Area

以砒砂岩地区林龄为8 a的沙棘群落为研究对象,采用χ2检验和Jaccard指数对沙棘群落18个优势种种间联结性进行了分析。结果表明:沙棘群落优势种在整体上呈现正关联,且呈显著相关的种对数占总对数的60.8%,说明该群落演替处于相对稳定的阶段;由于生态习性和生境的不同,沙棘群落分为2个不同的生态种组,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。

Eight years old plantation of the Hippophae rhamniodes community in Pisha rock area were used as material,interspecific relationships among eighteen dominant species in within the community were studied by Х^2 correction test and Jaccard index methods. The results showed that the overall associations among dominant species were positive, The number of species-pairs with positively related community amounted for 60.8% of the total, which indicates that the communities is in process of a relative stable growth stage, as the ecological character and the environment are different, the community could be divided into two groups. Species with positive associations had similar biological characteristics and similar habitat demand.