原始林内紫果云杉种群的数量动态

THE QUANTITATIVE DYNAMICS OF PICEA PURPUREA POPULATION IN VIRGIN FOREST

本文将紫果云杉种群看作是由不同径级林木所组成的群体,借以 Leslie矩阵描述其数量动态情况,由此得种群 Leslie 矩阵的特征根λ=1.028,对应特征向量亦即种群稳定的径级组成为:(9941,783,556,393,280,116,32,8)。结果表明:在原始林内,紫果云杉种群结构较为稳定,呈增长稳定型;经预测,种群未来的结构组成与现在的相似。

By taking Picea purpurea population as a group of trees in various classes of D.B.H.,its quantitative dynamics is described with Leslie matrix.The eigenvalue of this matrix for Picea purpurea is 1.028 or λ=1.028,and the eigenvector which reprents its stable structure is(9941,783,556,393,280, 116,32,8).The result demonstrates that the population structure of Picea purpurea is stable and shows its growing stability.The future structure of the population will be similar to the present one according to the prediction.