灵空山辽东栎林种群生态位特征  

Niche characteristics of a Quercus liaotungensis forest in the Lingkong Mountains

作　　者：伊力塔[1] 豪树奇[2] 韩海荣[3] 凡小华[1] 康峰峰[3] 

机构地区：[1]浙江农林大学林业与生物技术学院亚热带森林培育国家重点实验室培育基地,浙江临安311300 [2]中国计量学院艺术与传播学院,浙江杭州310018 [3]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《浙江农林大学学报》2012年第1期46-51,共6页Journal of Zhejiang A&F University

基　　金：国家林业局引进国际先进农业科学技术计划(948计划)项目(2010-4-15);华北区(北京;河南;山西)主要森林类型净生产力多尺度长期观测与评价项目(20080406/rhh-02)

摘　　要：利用样地调查数据,以物种重要值作为资源状态指标,应用Levins,Hurlbert生态位宽度公式和Levins生态位重叠公式对山西灵空山林区辽东栎Quercus liaotungensis群落6种乔木、8种灌木和11种草本进行了生态位宽度和生态位重叠计算。结果表明:灵空山林区乔木树种以辽东栎(Levins生态位宽度Bi=1.159 0,Hurlbert生态位宽度Ba=0.796 0),油松Pinus tabulaeformis(Bi=0.990 7,Ba=0.536 1)的生态位宽度值较大;灌木树种以三裂绣线菊Spireae trilo-bata(Bi=1.095 0,Ba=0.509 0)的生态位宽度值较大;而草本层中,披针薹草Carex lanceolata的生态位宽度值最大(Bi=1.309 7,Ba=0.948 5)。乔木、灌木、草本层各种群之间均有不同程度的重叠,重叠指数依乔木、灌木、草本层逐渐减少,总的表现为生态位宽度较大的物种对资源利用能力较强,与其他种群间的生态位重叠一般较大。To determine important indicators of resource status,such as species,niche breadth（Bi and Ba）,and niche overlap）,a survey of datum plots for populations of trees（6 species）,shrubs（8 species）,and herbs（11 species） within a Quercus liaotungensis forest in the Lingkong Mountains of Shaanxi Province were studied using the niche breadth formulae of Levins and Hurlbert and the niche overlap formula of Levins.Results indicated that in the overstory,niche breadth for Quercus liaotungensis（Bi = 1.159 0 and Ba = 0.796 0） and Pinus tabuliformis（Bi = 0.990 7 and Ba = 0.536 1） was greatest.In the shrub layer,niche breadth of Spiraea trilobata（Bi = 1.095 0 and Ba = 0.509 0） was largest.In the herb layer,niche breadth of Carex lanceolata（Bi = 1.309 7 and Ba = 0.948 5） was the most prevalent.Degrees of overlap existed among the various layers with the overlap indexes gradually decreasing from the overstory to the understory.Thus,species with a larger niche breadth had stronger resource utilization capabilities,and their niche overlap was greater than other populations.

关 键 词：森林生态学 生态位宽度 生态位重叠 辽东栎 灵空山 

分 类 号：S718.5[农业科学—林学]