福建武平米槠林恢复生态学研究 Ⅵ不同人为干扰尺度对各层次物种多样性指数、均匀度和优势度的影响  

Restoration Ecology Study of Castanopsis carlesii Forests in Wupin, Fujian:Ⅵ. Effects of artificial disturbance on different scales upon the diversity indices,evenness degree and domination degree in different layers

作　　者：王小明[1] 游水生[1] 

机构地区：[1]福建农林大学资源与环境系,中国福建南平353001

出　　处：《中南林学院学报》2002年第1期62-65,共4页Journal of Central South Forestry University

基　　金：福建省自然科学基金资助项目 ( C940 0 5 )

摘　　要：从物种多样性指数、均匀度和优势度角度分析了不同人为干扰尺度 (原始米槠林、择伐更新、天然更新、人促更新和种植杉木林 )对福建武平米槠林各层次恢复的影响 .结果表明 :随着不同人为干扰尺度加大 ,乔木层物种多样性指数和均匀度呈线性下降、而优势度呈线性上升 ,灌木层物种多样性指数和均匀度呈“下降—上升”交替变化趋势、而优势度延伸至 B级后上升 ,草本层和层外植物物种多样性指数和均匀度上升至 B级或 C级后下降、而优势度上升至 A级后下降 ;人工种植杉木后各方面指标与原始米槠林相距甚远 ,目前较难恢复到米槠顶极群落 ,而其余更新方式以顶极种米槠为第一优势种或第二优势种 ,各方面指标与原始米槠林相距较近 ,将能恢复到米槠顶极群落 .The effects of artificial disturbance on different scales (original forests, regeneration after selection cutting, natural regeneration, natural regeneration promoted by artificial measures and Chinese fir) upon the restoration of different layers of Castanopsis carlesii forests in Wupin,Fujian has been discussed with regard to the diversity indices of species (DI), evenness degree (ED) and domination degree (DD).The results show that with the enhancement of disturbance scales, DI and ED of tree layer decrease linearly with a linear increase of DD; DI and ED of shrubs show alternatively a 'down up' changing principle while DD stretches to natural regeneration and then increases; DI and ED of herb and vine layers increase to natural regeneration or artificial regeneration and then get down while DD increases to regeneration after selection cutting and then comes down. All indices in Chinese fir are much more different from those of original forests and Chinese fir is difficult to restore back to the climax. The indices in other regeneration forests with Castanopsis carlesii as the dominant species are much more closer to that of original forests and they will restore back to the climax.

关 键 词：米槠林 恢复生态学 人为干扰尺度 物种多样性指数 均匀度 优势度 

分 类 号：S792.17[农业科学—林木遗传育种] S718.5[农业科学—林学]