摘要
基于对贵州省岩生红豆(Ormosia saxatilis)天然林群落样地调查,采用定量分析方法对群落不同层次主要树种生态位宽度、生态位相似比例、生态位重叠等进行研究。结果表明:1)采用Levins和Shannon-Wiener两指数测定的生态位宽度值存在较大差异,但前几位顺序基本一致;2)在乔木层中,岩生红豆、云贵鹅耳枥(Carpinus pubescens)、朴树(Celtis sinensis)、青冈栎(Cyclobalanopsis glauca)等具有较大生态位宽度值,其B(SW)i和B(H)i值分别为0.6559、0.5113、0.3635、0.3369和0.9086、0.4545、0.4071、0.3298;3)在灌木层中,岩生红豆、圆果化香(Platycarya longipes)等也具有较大生态位宽度值;4)物种生态位宽度大小体现其对环境的适应范围,宽度越大,适应能力就越强;5)物种生态位宽度大小与生态位重叠值之间有密切关系,生态位宽度大的物种对间一般具有较大的重叠值,生态位宽度较大物种与其它物种间往往具有较大的生态位相似比例和重叠值,重叠值越大,其利用资源的相似程度就越大,竞争就会越激烈。
We made an investigation on the Ormosia saxatilis in the Ormosia saxatilis community in the natural forest of Guizhou,studying the niche breadth values,niche proportional similarity values and niche overlapping values of the major tree species at different levels through the method of quantitative analysis. The results are as follows. 1） There is a large difference in the niche breadth of the tree layers of Ormosia saxatilis,Carpinus pubescens,Celtis sinensis,Cyclobalanopsis glauca etc,measured with Levins and Shannon-Wiener indexes,but the sequences of the first ones are basically the same. 2） In the arborous layers,the trees have a large niche breadth. Their B（SW）i and B（H）i are as following： 0.6559,0.5113,0.3635,0.3369 and 0.9086,0.4545,0.4071,0.3298. 3） In the shrub layers,O. saxatilis,Platycarya longipes and other species have large niche breadth as well. 4） The niche breadth can reflect the species＇ adaptive norm,that is to say,the larger the niche breadth is,the stronger the species is. 5） The niche breadth and the niche overlap are closely linked. Generally speaking,species with a larger niche breadth own larger overlap values. Besides,the species and other species have more similarities and larger overlap values. In a word,the larger overlap values they have,the more similarities they have in utilizing resources,and the more intense the competiveness will become.
出处
《生态科学》
CSCD
北大核心
2013年第4期487-493,528,共8页
Ecological Science
基金
贵州省林业科学技术研究项目(2009-6)
贵州省科技支撑项目(黔科合NY字[2010]3058号)
贵州大学自然科学青年科研基金项目(贵大自青基合字2009-004)
关键词
岩生红豆
种群
生态位宽度
生态位相似比例
生态位重叠
Ormosia saxatilis
population
Niche breadth
Niche proportional similarity
Niche overlapping
