尕海-则岔国家级自然保护区不同海拔紫果云杉群落物种多样性特征  

Species Diversity of Picea purpurea Community at Different Altitudes in Gahai-Zecha National Nature Reserve

作　　者：高晨雁 Gao Chenyan(Institute of Forestry Science of Bailongjiang in Gansu Province,Lanzhou 730070,China)

机构地区：[1]甘肃省白龙江林业科学研究所,甘肃兰州730070

出　　处：《四川林业科技》2023年第3期141-145,共5页Journal of Sichuan Forestry Science and Technology

摘　　要：以尕海-则岔国家级自然保护区的紫果云杉群落为研究对象,应用群落调查法,调查分析了群落中各层的物种组成及物种多样性。结果表明:(1)尕海-则岔国家级自然保护区紫果云杉群落内共有植物82种,隶属于41科60属,以菊科(Asteraceae)、蔷薇科(Rosaceae)、忍冬科(Caprifoliaceae)植物为主;(2)群落内各层丰富度指数(S)、Shannon-Wiener多样性指数(H)、Simpson优势度指数(D)以及Pielou均匀度指数(E)总体为灌木层>草本层>乔木层,随海拔的升高,乔木层、草本层的各项多样性指数随海拔升高呈先升后降的单峰曲线规律,灌木层物种多样性指数随海拔升高呈单调下降曲线变化规律;(3)海拔与乔木层、灌木层的各项多样性指数间呈现负相关关系,与草本层的物种丰富度指数(S)呈负相关关系,与草本层的其它指数间呈正相关关系。综合研究得出:尕海-则岔自然保护区紫果云杉群落物种多样性受海拔影响较大。In this study,the Picea purpurea community in Gahai-Zecha National Nature Reserve was taken as the research object,and the species composition and species diversity of each layer in the community were investigated and analyzed by community survey method.The results showed that:(1)There were 82 species of P.purpurea community in Gahai-Zecha National Nature Reserve,belonging to 41 families and 60 genera,which were dominated by Asteraceae,Rosaceae and Caprifoliaceae.(2)The richness index(S),Shannon-Wiener diversity index(H),Simpson dominance index(D)and Pielou evenness index(E)of each layer in the community were in the order of shrub layer>herb layer>tree layer.With the increase of altitude,the diversity indexes of tree layer and herb layer increased first and then decreased with the increase of altitude,and the diversity index of shrub layer decreased monotonically with the increase of altitude.(3)There was a negative correlation between altitude and diversity indexes of tree layer and shrub layer,a negative correlation between altitude and species richness index(S)of herb layer,and a positive correlation between altitude and other indexes of herb layer.The results showed that the species diversity of P.purpurea community in Gahai-Zecha Nature Reserve was greatly affected by altitude.

关 键 词：尕海-则岔国家级自然保护区 紫果云杉 物种多样性 

分 类 号：S791.18[农业科学—林木遗传育种]