秦岭锐齿栎林种群生态位特征研究

摘要/Abstract

摘要： 基于秦岭林区锐齿栎群落31块400 m²的样地调查数据,以物种的重要值为生态位计算的资源状态指标,应用Levins、Hurlbert公式和Pianka公式对该林区锐齿栎群落24种主要乔木和29种灌木进行了生态位宽度和生态位重叠计算与分析.结果表明,该群落中主要优势种群的生态位宽度较大,乔木层的主要优势种群锐齿栎、华山松、漆树、山杨、油松等的Levins、Hurlbert生态位宽度值分别为3.695、1.695、1.325、0.840、0.702和0.036、0.299、0.568、1.721、2.701,灌木层的主要优势种群榛子、美丽胡枝子、鞘柄菝葜等的Levins、Hurlbert生态位宽度值分别为1.833、1.466、0.984和0.111、0.300、0.594.生态位宽度较大的物种对资源利用能力较强,与其它种群间的生态位重叠一般较大;对相似环境要求的物种间生态位重叠较大.

关键词: 秦岭, 锐齿栎, 生态位宽度, 生态位重叠

Abstract: Based on the data collected from³1 plots and using Levins,Hurlbert and Pianka formulas,this paper calculated and analyzed the niche breadths and overlaps of 24 tree and 29 shrub populations in Quercus aliena var. acuteserrata stands in Mt.Qinling,Shaanxi.The results showed that the Levins and Hurlbert's niche breadths of Quercus aliena var. acuteserrata,Pinus armandi,Toxicodendron vernicifluum,Populus davidiana and Pinus tabulaeformis in arbor layer were 3.695,1.695,1.325,0.840,0.702 and 0.036,0.299,0.568,1.721,2.701 respectively,and those of Corrylus heterophylla,Lespedeza formosa and Smilax vaginata in shrub layer were 1.833,1.466,0.984 and 0.111,0.300,0.594,respectively.In general,the niche overlaps between the species with bigger niche breadth and other species were higher,and those of the species having similar environmental requirements were also higher.

Key words: MtQinling, Quercus aliena var acuteserrata, Niche breadth, Niche overlap

中图分类号:

S718.5

赵永华, 雷瑞德, 何兴元, 贾夏. 秦岭锐齿栎林种群生态位特征研究[J]. 应用生态学报, 2004, (6): 913-918.

ZHAO Yonghua, LEI Ruide, HE Xingyuan, JIA Xia . Niche characteristics of plant populations in Quercus aliena var. acuteserrata stands in Qinling Mountains[J]. Chinese Journal of Applied Ecology, 2004, (6): 913-918.

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