黄土梁大熊猫走廊带典型群落恢复初期植物多样性研究

为了探究黄土梁典型植被(康定柳灌丛、紫果云杉人工林)改造1年后植物多样性恢复的初期规律,采用样方法对改造前后的柳灌丛、云杉林进行了群落学调查,对比分析了二者的物种组成与多样性的差异。有以下结果:(1)康定柳灌丛、云杉人工林改造1年后,主要增加了速生、喜阳的草本物种,栽植的乔木幼苗和大熊猫主食竹生长缓慢,二者盖度、多度较低;(2)与改造前相比较,灌丛皆伐带、疏伐云杉林、云杉林窗样地的灌草总丰富度分别提升77.27%、13.89%、22.23%;(3)柳灌丛、云杉人工林灌木和草本的ShannonWiner指数、Simpson指数均呈上升的趋势。黄土梁大熊猫走廊带的两种典型植被(康定柳灌丛、紫果云杉人工林)改造后还需要更长时间的恢复,以充分提升物种多样性,恢复大熊猫主食竹和栖息地生态功能。

Study on Species Diversity of Typical Communities in the Early Restoration Stage in Huangtuliang Giant Panda Corridor

In order to explore the initial law of plant species diversity restoration after one year’s transformation of typical vegetation,Salix paraplesia shrubbery and Picea asperata forest,in Huangtuliang corridor of giant panda,the community survey of S.paraplesia shrubbery and P.asperata forest before and after transformation was carried out by sampling method,and the differences of species composition and diversity between them were compared and analyzed.The results are as follows:(1)After one year’s transformation,fast-growing and shade-tolerant herbs increased obviously,and planted broad-leaved tree seedlings and F.denudata grew slowly,maintaining lower coverage and abundance;(2)The total richness of shrubs and herbs in the community increased by 77.27%,13.89%,and 22.23%,respectively in the clear-cutting shrub zone,the thinning spruce forest and the spruce forest gap plot;(3)After one year’s transformation,the species richness index,Shannon-Winer index,and Simpson index of shrubs and herbs in the S.paraplesia shrubbery and P.asperata forest were on the rise.It will take a longer time for S.paraplesia shrubbery and P.asperata forest to restore,so as to fully improve the species diversity and restore the ecological functions of giant panda staple bamboo and the habitat.