贡嘎山东坡植被原生演替的种间协变

INTERSPECIFIC COVARIATION DURING PRIMARY SUCCESSION ON THE EAST SLOPE OF GONGGA MOUNTAIN

泥石流迹地形成植被原生演替系列．通过对演替不同阶段群落优势种群多度的调查，主要采用Ｓｐｅａｒｍａｎ系数来测度种对的多度数据协变的相对强度．结果表明，ｒ对策和Ｋ对策的种对有负协交关系；先锋树种的种对有正协变关系．

The primary succession has taken place at the debris flow fan in the Huangbenliu Gully on the east slope of Gongga Mountain. Interspecific covariation and dynamics of dominant population for primary succession seral communities are identified on the basis of tree abundance using Pearson product-moment and Spearman rank correlation coefficients, as well as are related to successional seral community characteristics. Climax species will substitue for pioneer species during primary successional process. Spearman rank correlation coefficient between pioneer species and climax species is negative value. Spearman rank correlation coefficient between dominant population for pioneer communities is positive value.