塞罕坝华北落叶松人工林下草本生态位研究  

Research on Larch Forest Herbs Niche in Saihanba

作　　者：赵上[1] 谷建才[1] 习新强[2,3] 杨玉梅[1] 陈平[1] 项广瑞[1] 

机构地区：[1]河北农业大学林学院,河北保定071000 [2]中国科学院植物研究所植被与环境变化国家重点实验室,北京100093 [3]中国科学院研究生院,北京100049

出　　处：《林业资源管理》2011年第1期86-90,共5页Forest Resources Management

基　　金："冀北山区典型森林生态系统健康经营技术研究与示范"项目(200804022F)

摘　　要：采用样方法进行不同资源位群落调查,计算了塞罕坝地区华北落叶松人工林下草本植物的生态位宽度以及生态位重叠,结果表明:细叶苔草和蒲公英具有较大的生态位宽度,其LNB值分别为1.185 1和1.004 8,HNB值分别为0.431 4和0.294 2;除了32.61%的草本生态位宽度(LNB)值为0以外,大部分生态位宽度(LNB)集中在[0.4,0.6),[0.6,0.8)和[0.8,1.0),分别占19.57%,19.57%和15.22%。草本物种间生态位重叠大于0.1的占67.64%,表明落叶松人工林下草本植物之间因利用相同的资源位而产生的种间竞争较为激烈。This study used plot method for surveying different resource niche community, and calculated herb niche breadth and niche overlap in Larix prinicipis -rapprechii plantation in Saihanba. The results showed that：Carex rigescens and Saussurea taraxacifolia had larger niche breadth, the LNB was 1. 1851 and 1. 0048,the HNB was 0. 4314 and 0. 2942 respectively. In addition 32.61% of herb niche breadth （LNB） was 0, most concentrated on [ 0.4, 0.6）, [ 0. 6,0. 8 ） and [ 0.8,1.0）, the LNB was 19.57 % 19.57% and 15.22% respectively. Herbaceous species niche overlap accounted for 67.64% larger than 0. 1 ,indicating that the herbaceous plants had intense interspecific competition for using same resource niche in Larch plantation.

关 键 词：生态位重叠 Levins生态位宽度 Hurlbert生态位宽度 群落稳定性 

分 类 号：S718.5[农业科学—林学]