西北林学院学报2024，Vol.39Issue(2)：173-181,9.DOI:10.3969/j.issn.1001-7461.2024.02.22
陕西秦岭西段典型森林群落数量分类与排序及多样性特征
Quantitative Classification,Sorting and Diversity Characteristics of Typical Forest Communities in Western Section of the Qinling Mountains,Shaanxi Province
摘要
Abstract
In order to investigate the spatial distribution patterns of typical forest communities in the west-ern part of the Qinling Mountains in Shaanxi and their relationships with environmental factors,and to pro-vide a theoretical basis for studying the conservation of species diversity in regional forest communities,a comprehensive survey was carried out in the Motianling Nature Reserve and Zibaishan Nature Reserve.Twenty communities with typical vegetation characteristics were selected as sample plots,which were quantitatively classified by multivariate regression trees(MRT),ranked by canonical correspondence anal-ysis(CCA),and the overall diversity of forest communities obtained by classification was analyzed.The re-sults showed that 1)MRT classification of 20 plots showed that the typical forest communities of the western section of the Qinling Mountains could be divided into three categories,namely Pinus tabulifor-mis-Sophora davidii-Anemone vitifolia community,Quercus mongolica-Rubus idaeus-Duchesnea indica community and P.armandii-Arundinaria fargesii-Deyeuxia pyramidalis community.2)CCA ranking revealed the relationship between typical forest community distribution and environmental factors,and the results showed that elevation was the most important environmental factor affecting the distribution of for-est communities in the study area,followed by slope aspect and slope gradient.3)The species richness and Shannon-Wiener diversity indices of all levels of the forest communities in the study area and the Pielou evenness index of the tree layer generally showed an increasing trend along the elevation gradient,while the Pielou evenness index of the shrub and herb layers did not fluctuate much with the elevation gradient.In summary,elevation is the main environmental factor affecting the distribution and composition of forest communities in the western part of the Qinling Mountains in Shaanxi,and the results of the study provide a theoretical basis for an in-depth investigation of the spatial distribution patterns of forest communities and the conservation of their species diversity in the western part of the Qinling Mountains in Shaanxi.关键词
多元回归树/典范对应分析/物种多样性/群落分类/秦岭西段Key words
multiple regression tree/canonical correspondence analysis/species diversity/community clas-sification/western section of the Qinling Mountains分类
农业科技引用本文复制引用
崔雨昕,胡宁宁,王丹,孙萌,康冰..陕西秦岭西段典型森林群落数量分类与排序及多样性特征[J].西北林学院学报,2024,39(2):173-181,9.基金项目
2019年医疗服务与保障能力提升补助资金项目(中医药事业传承与发展部分第四次全国中药资源普查项目)(财社[2019]39号). （中医药事业传承与发展部分第四次全国中药资源普查项目）
