过伐林群落的种对关联分析

过伐林是原始阔叶红松林经不合理采伐后仍保持０．４以上郁闭度的林分，现有的过伐林大多是自原始林破坏后已经历了３０多年自然恢复过程的群落。以长白山林区典型的过伐林区─—白石山林区为例，分析了过伐林群落中不同树种间的联结情况．结果表明，过伐林中树种间的联结特性主要是与它们本身的生物学、生态学特性有关，但也多少受人为选择性采伐的影响．在白石山林区过伐林中，有显著相关的树种对占总树种对的１９．２３％，其中呈正相关的占７．６９％，呈负相关的占１１．５４％．

Analysis on Species Association in the Post Cutting Forest Communities

The post cuttiiig forest came from virgin broad-leaved korean pine forest whichexperienced irrational cutting,but had a crown density of 0.4 and plus. The present post cut-ting forest had a natural recovery succession history of more than 30 years since its forma-tion. The typical post cutting forest area was chosen as the study sites. In this paper.the as-sociation conditions of different tree species are analysed.The result shows that assocationsbetween different tree species mainly relate with their biological and ecological characteris-tics,but are more or less influenced by human selective cutting disturbances. In the studyarea,19. 23% pairs of trees correlate significantly,of which 7.69% are positively correlativeand 11.54% are negatively correlative.