帽儿山落叶松群落主要树木种群间联结关系的研究

Interspecific association of dominant tree species in Larix gmelini(Rupr.) Rupr. community of Maoer Mountain

采用2×2列联表,通过方差分析、χ2检验、Ochiai指数、Dice指数和Jaccard指数对帽儿山落叶松所在群落优势种的种间联结性进行了定量分析。结果表明:落叶松群落总体间的关联性表现为不显著正关联,在91对种对中46对表现为正关联,其中极显著正关联的种有8对,显著正关联的有4对,极显著负关联的种对有7对。在相对稳定的群落中优势种间可以共同利用群落中的非限制性资源,形成显著的正关联。这种关联性一方面与物种本身的生物学与生态学特性有关,另一方面与群落演替的时间与空间有关。

A series of techniques including the Jaccard coefficient were used based on a analy 2×2 sis of variance, chi-square test, Ochiai index, Dice index and contingency table to determine the overall association of all species and the coefficient of interspecific association of the dominant species in Larix gmelini （Rupr.） Rupr stands in Maoer Mountain of northeastern China＇ s Heilongjiang Province. The results show that the overall associations of all species were not significantly positive correlation. There were 46-paired positive correlation, 8-paired very significantly positive correlation, 4-paired significantly positive correlation and 7-paired significantly negative correlation in 91 species pairs. Dominant species of relative stable community shared the non-restrictive resources and formed the remarkable positive correlation. This kind of association, on the one hand is related with species characteristics of biology and ecology, on the other hand is concerned with the time and space of community succession.