黄土高原沟壑区油松人工林林下主要种群生态位研究  

THE STUDY OF THE NICHE OF THE MAIN PLANT POPULATION UNDER THE Pinus tabuliformis PLANTATION IN GULLY REGION OF LOESS PLATELAU

作　　者：黄耀[1] 王乃江[1] 党鹏[1] 裴乔 

机构地区：[1]西北农林科技大学林学院西部环境与生态教育部重点实验室,陕西杨凌712100

出　　处：《内蒙古农业大学学报（自然科学版）》2016年第4期46-51,共6页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：科技部国家"十二五"科技支撑计划项目(2012BAD22B03-03)

摘　　要：目的:研究黄土高原沟壑区油松人工林林下主要种群的生态位,为该地区油松人工林合理经营提供科学依据。方法:采用样地调查法,应用Shannon-Weinner多样性指标及Levins生态位宽度公式、Pianka生态位重叠公式等对陕西淳化县油松人工林林下主要植物种群的生态位特征进行了分析。结果:1油松人工林林下主要种群中,披针苔草的生态位宽度最宽为0.962 3,水栒子的生态位宽度最窄为0.158 1;2在草本层中,优势种披针苔草和其他种之间的生态位重叠值并没有非常高的,一些亚优势种之间的重叠值比较高,如龙牙草和多花木兰,它们的生态位重叠值为0.962 7;3在灌木层中,各物种间的生态位重叠值普遍小于草本层,物种间的竞争压力更小。结论:该地区油松人工林拥有一个较为稳定的森林环境。Objective ：This study investigated the niche of the main plant population under the Pinus tabuliformis plantation in gully region of Loess Platelau to provide scientific basis for the sustainable management of this area. Method：By using the method of field investigation, the niche characteristics of the main plant population under the Pinus tabuliformis plantation were analyzed by using Shannon - Weinner biodiversity indicator, Levins formulae of niche breadth and Pianka formula of niche overlap. Result ：The results show that： ①The niche breadth of Carex dahurica was biggest, 0.962 3, and Cotoneaster multiflorus had the smallest niche breadth in the main plant population under the Pinus tabuliformis plantation;②In herb layer, Carex dahurica , the dominant specie, which did not have very high niche overlap between the others, the highest niche overlap was appeared between the subdominant species, like the niche overlap between Agrimonia pilosa and Magnolia multiflora is 0.962 7; ③In shrub layer, the niche overlap is generally less than the niche overlap in herb layer, there was Less competitive pressure among those species. Conclusion：The surroundings of the Pinus tabuliformis plantation is stable in this area.

关 键 词：油松人工林 生态位宽度 生态位重叠 仲山森林公园 

分 类 号：Q145[生物学—生态学]