生态学杂志2012，Vol.31Issue(9)：2170-2176,7.
外来树种华北落叶松引种对秦岭森林群落的影响
Effects of exotic tree species Larix principis-rupprechtii introduction on forest community in Qinling Mountains of Northwest China
摘要
Abstract
By the method of plot investigation, a comparative study was made on the differences in the community characteristics among the exotic tree species Larix principis-rupprechtii plantation, indigenous tree species Pinus armandii plantation, and P. armandii secondary forest in Huoditang forest area of Qinling Mountains. The similarity coefficient between L. principis-rupprechtii plantation and P. armandii secondary forest was only 0. 11, and the species number in the P. armandii secondary forest and P. armandii plantation was significantly greater than that in L. principis-rupprechtii plantation (P＜0. 01). The Margalef index, Simpson index, Shannon-Wiener index, and Pielou evenness index in the arbor, shrub, and herb layers of P. armandii secondary forest and P. armandii plantation were significantly higher than those in L. principis-rupprechtii plantation (P＜0.001) , but the four diversity indices in the shrub layer and herb layer in P. armandii secondary forest and P. armandii plantation had less difference (P＞0.05) . The compose index ( CI) was the lowest (0. 3) in L. principis-rupprechtii plantation, 3. 5 in P. armandii plantation, and the highest (5.2) in P. armandii secondary forest, showing a significant difference among the three forest types (P＜0. 001). This study indicated that exotic tree species introduction led to the decrease of species abundance, species diversity, and stand' s naturalized degree in the forest community in Qinling Mountains, while natural secondary forest succession or indigenous tree species plantation were more beneficial to the restoration of understory vegetation than exotic tree species plantation.关键词
外来树种/乡土树种/物种多样性指数/自然构成系数Key words
exotic tree species/ indigenous tree species/ species diversity index/ composeindex分类
农业科技引用本文复制引用
彭舜磊,王得祥,柴宗政..外来树种华北落叶松引种对秦岭森林群落的影响[J].生态学杂志,2012,31(9):2170-2176,7.基金项目
林业公益性行业科研专项(20100400206)和国家自然科学基金项目(31070570)资助. （20100400206）
