辽河源自然保护区不同年龄天然油松林林下草本层植物物种多样性及其环境解释  

Environmental factors affecting plant species diversity of understory herbaceous communities in a chronosequence of Pinus tabuliformis forest in Liaoheyuan Nature Reserve

作　　者：矢佳昱 韩海荣[1] 程小琴[1] 董玲玲[1] 田慧霞[1] 蔡锰柯 SHI Jia-yu,HAN Hai-rong,CHENG Xiao-qin,DONG Ling-ling,TIAN Hui-xia,CAI Meng-ke(Key Laboratory of Forest Cultivation and Conservation of the Province and the Ministry of Education, Beijing Forestry University, Beijing 100083, China)

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《生态学杂志》2018年第5期1326-1333,共8页Chinese Journal of Ecology

基　　金：林业公益性行业科研专项(201204101)资助

摘　　要：林下草本层植物在森林群落结构稳定性的调节和生态功能的发挥上具有非常重要的作用,是森林生态系统不可或缺的组成部分。本文从揭示天然林林下物种组成的主导因子出发,以不同年龄天然油松林林下草本层植物为研究对象,探讨了辽河源自然保护区林下草本层物种组成与环境因子间的相关关系。结果表明,林龄是影响林分土壤化学性质的空间变化的重要因子,但林龄与林下草本植物的物种丰富度和多样性指数间不存在线性关系。CCA排序及Monte Carlo检验结果表明,林龄、林分密度、平均胸径、郁闭度、坡度为显著影响天然油松林林下物种分布的因子,说明该地区林分的冠层结构特征主导了林下草本层植物群落的分布格局。As an indispensable component of forest ecosystems,species of herbaceous layer play a crucial role in regulating the community stability and ecological function of forests. We examined the relationships between the composition of understory community and the environmental factors in Pinus tabuliformis forests with different stand ages in Liaoheyuan Natural Reserve,aiming to reveal the main factors driving understory species composition. The results showed that stand age was an important factor driving the spatial variation of soil chemical properties in the forests. However,there was no linear relationship between forest age and the species diversity and richness index within the herb layer. The results from CCA ordination and Monte Carlo test showed that stand age,stand density,mean diameter at breast height,canopy density,and slope were main factors determining the composition of the herb layer,indicating that forest canopy structure determined the distribution pattern of herb layer plant communities in this region.

关 键 词：物种多样性 植被-环境关系 林下群落 暖温带 典范对应分析(CCA) 

分 类 号：S718.5[农业科学—林学]