【摘要】 采用定量分析法，通过生态位宽度、生态位重叠度、生态位相似性等指标，对福建晋江灵源山森林群落林下灌草植物的生态位进行研究，为恢复植被生态提供依据。结果表明：(1)灌木和草本优势种重要值之和分别为70.50和78.34,其中鹅掌柴和毛秆野古草的重要值最大，分别为7.99和11.92,潺槁木姜子和五节芒的重要值变异系数最大，分别为230.17%和296.20%。(2)生态位宽度与重要值呈不显著正相关，与重要值变异系数呈显著负相关；灌木层石斑木和草本层假臭草的生态位宽度最大，其Shannon-Wiener和Levins生态位宽度分别为3.32和22.74、3.24和22.43,在群落中占据最大资源位，但重要值比部分生态位宽度小的物种小。(3)灌木和草本优势种生态位重叠度平均值分别为0.309和0.211，重叠度较小，表明共存物种种间竞争不激烈，对环境资源共享能力弱。(4)灌木和草本优势种生态位相似性分别为0.311和0.194，利用资源的相似程度较低;生态位相似性与生态位重叠趋势基本一致，但与生态位宽度无明显关联。综上所述，灵源山森林群落林下灌草物种竞争不激烈，生存环境脆弱，为修复破碎生境，应对灵源山森林群落全面进行抚育改造，注重不同层次树种间的配置，恢复植被生态。更多还原

【Abstract】 Using quantitative analysis methods, we evaluated the niche breadth, niche overlap, and niche similarity index to determine the niche of understory shrubs and herbs in a forest community of the Lingyuan Mountain in Jinjiang City, Fujian Province and provide a basis for restoring vegetation ecology. The results showed that:(1)the sum of the importance values of dominant shrubs and herbs were 70.50 and 78.34, respectively. Schefflera heptaphylla and Arundinella hirta had the largest importance values, 7.99 and 11.92, respectively. Litsea glutinosa and Miscanthus floridulus had the largest coefficient of variation, 230.17% and 296.20%, respectively.(2)Although not significantly positively correlated with the importance value, the niche breadth was significantly negatively correlated with the variance coefficient of the importance value. The niche breadths of Rhaphiolepis indica in the shrub layer and Praxelis clematidea in the herb layer were the largest with Shannon-Wiener and Levins′ niche breadths of 3.32 and 22.74, and 3.24 and 22.43, respectively. These two species occupied the largest resource position in the community, but their importance values were smaller than those of some species with a small niche breadth.(3)The average niche overlaps of the dominant shrub and herb species were 0.309 and 0.211, respectively, indicating that the competition among coexisting species was not fierce and the ability to share environmental resources was weak.(4)The niche similarities of the dominant shrub and herb species were 0.311 and 0.194, respectively, and the similarity of utilization resources was low. Niche similarity was consistent with the trend of niche overlap but showed no obvious correlation with niche breadth. In summary, the competition between the shrub and herb species in the Lingyuan Mountain forest community is not intense, and the survival environment is fragile. To repair the damaged habitat, the forest community in the Lingyuan Mountain should be comprehensively nurtured and rebuilt, and the allocation of tree species at different niche levels should be emphasized to restore vegetation ecology.更多还原