摘要
吕梁山南段在中国植被区划上，属暖温带南部落叶阔叶林亚地带向暖温带北部落叶阔叶林亚地带的过渡地带。通过样方调查，采用丰富度指数、物种多样性指数和均匀度指数，并结合TWINSPAN分类、DCCA分析，对该地区群落多样性及其与环境因子之间关系进行了研究。结果表明：1．74个样方共记录了种子植物109种，分属41科91属；2．TWINSPAN等级分类法将74个样方划分为8组，分属于8个群系，2个植被型；3．植物群落的总体多样性变化趋势随海拔高度的升高而升高，从群落结构来看，灌木层多样性指数随海拔高度升高而升高，草本层多样性指数则有下降的趋势（Simpson指数例外）；4．物种多样性指数的DCCA排序图反映了海拔和人类活动干扰是影响该地区植物群落多样性的主要环境因子；5．该地区海拔1100～1300m的灌木状半常绿檀子栎（Quercus baronii）林和栓皮栎（Quercus variabilis）的零散分布，是该地区具有明显的暖温带南部落叶阔叶落叶林亚地带向暖温带北部落叶阔叶林亚地带的过渡特征主要标志。
South Luliang Mountains, Shanxi, is located in the ecotone between south warm-temperate deciduous broad-leaved forest subzone and north warm-temperate deciduous broad-leaved forest subzone according to the results of China vegetation regionalization. Through plot investigation, by using richness, diversity and evenness indices, we studied the relationships between plant communities and environment factors in the area combining with TWINSPAN, DCCA techniques. The results indicated that： 1 ） There were 109 species of seed plants belong to 41 families and 91 genera in the 74 quadrats; 2） By using TWINSPAN, seventy-four quadrates were classified into 8 groups, which were belong to 8 associations, 2 vegetation types; 3 ） The plant communities diversity indices increased as the altitude raised. It was showed that the diversity indices in shrub layer raised, but in herb layer reduced with the raising of altitude from the Community structure （ except Simpson index ） ; 4） Altitude and human disturbance were the main environment factors that influenced the diversity of plant community in DCCA ordination figure; 5） The study indicated, Quercus baronii semi-evergreen shrubs which is at the elevation of 1 100 - 1 300 m and Quercus variabilis is few distributed in this area. And they were the mainly significant of ecotone between south warm-temperate deciduous broad-leaved forest subzone and north warm-temperate deciduous broad-leaved forest subzone in this area.
出处
《山地学报》
CSCD
北大核心
2008年第5期612-619,共8页
Mountain Research
基金
山西省自然科学基金(No.2006011095)资助项目~~
