文峪河上游河岸林下灌木和草本植物α多样性研究

Research on Shrub and Herb α Diversity under Riparian Forest Upstream of Wenyuhe Watershed

为了解河岸林群落的结构特点,通过设置连续小样方样带调查法,对文峪河流域上游5个典型河岸林带进行了群落学调查,结果表明:该研究地区灌木Shannon-wiener指数在不同林型下的大小顺序依次为:阔叶混交林>针阔混交林>油松纯林>华北落叶松纯林>云杉纯林,Simpson丰富度指数和Pielou均匀度指数都是在阔叶混交林下最高,为0.809和0.909;草本植物Shannon-wiener指数在不同林型下的大小顺序依次为:阔叶混交林>华北落叶松纯林>针阔混交林>云杉纯林>油松纯林,Simpson丰富度指数在阔叶混交林下最高,为0.888,Pielou均匀度指数针阔混交林下最高,为0.923。从不同林型河岸林下灌木和草本植物的α多样性指数(Shannon-wiener指数、Simpson指数和Pielou指数)分布格局可以初步判定该河岸林的边界在距溪流30～50m处。

By setting five typical and continuous sample plots, community investigation was conducted on the riparian forest up- stream of Wenyuhe watershed to understand the structural characticristics of the community. The results showed that Shannon wiener index of shrubs in different forest types was： broadleaved mixed forest 〉 conifer-broadleaf forest 〉Chinese pine 〉 larch forest forest 〉 spruce forest. Simpson abundance index and Pielou evenness index in broad-leaved mixed forest was the highest with 0. 809 and 0. 909 respectively〉Shannon-wiener index of herb in different forest types was.. broadleaved mixed forest 〉 larch forest〉conifer-broadleaf forest 〉 spruce forest 〉 Chinese pine. Simpson abundance index in broad-leaved mixed forest was highest（0. 888）,and Pielou evenness index in conifer-broadleaf forest was 0. 923 . From different types of forests distribution pattern of the alpha diversity index （Shannon-wiener index, Simpson index and PMou index） of shrub and herb can determine the initial forest boundary is 30 to 50 meters away from the stream.