摘要
【目的】明晰紫金山针阔混交林主要植物种群的生态位特征,可以了解物种对环境资源的利用能力和相似性,为森林经营管理提供一定参考价值。【方法】在样地调查基础上,以调查样方为资源轴,运用Levins和Shannon-Wiener生态位宽度以及Pianka生态位重叠度的计算方法,对针阔混交林群落中10种乔木、10种幼树、7种灌木、6种藤本、8种草本的种群生态位进行定量研究。【结果】1)群落各层次生态位宽度最大的物种分别为乔木层的马尾松Pinus massoniana、乔木更新层的白檀Symplocos paniculata与朴树Celtis sinensis、灌木层的山莓Photinia serrulata、藤本层的络石Trachelospermum jasminoides、草本层的苔草Carex chinensis。2)各层次生态位重叠度在0.00~0.85之间,最大生态位重叠度的物种对分别为乔木层的朴树与山胡椒Lindera glauca、乔木更新层的山胡椒和白檀、灌木层的六月雪Serissa japonica与黑果菝稧Smilax glaucochina、藤本层的络石与地锦Euphorbia humifusa、草本层的苔草与野青茅Deyeuxia arundinacea。3)各层次生态位宽度的标准差大小顺序为:藤本层>灌木层>草本层>乔木更新层>乔木层,生态位重叠度均值大小顺序以及各自的标准差分别为:乔木层(0.621,0.14)>藤本层(0.430,0.20)>乔木更新层(0.408,0.19)>灌木层(0.406,0.22)>草本层(0.364,0.16)。【结论】紫金山针阔混交林乔木层主要树种对生境资源的偏好和利用较为相似。
【Objective】Aimed to evaluate niche characteristic of main plant populations in a coniferous and broad-leaved mixed forest on Zijin Mountain. 【Method】On the basis of the data collected from forest sample survey, forest sample plot was defined as resource axis, and the niche breadth and overlap of the main populations that included ten tree species, ten saplings species, seven shrub species, six vine species and eight herbs species were calculated by using the formulas of Levins & Shannon-Wiener niche breadth and Pianka niche overlap.【Result】1) These species with the largest niche breadth were Pinus massoniana in the tree layer, Symplocos paniculata and Celtis sinensis in the sapling layer, Photinia serrulata in the shrub layer, Trachelospermum jasminoides in the vine layer and Carex breviculmis in the herb layer. 2) The niche overlap of all layers in communities varied from 0.00 to 0.85, and these species pairs with largest niche overlap were Celtis sinensis and Lindera glauca in the tree layer, Lindera glauca and Symplocos paniculate in the sapling layer, Serissa japonica and Smilax glaucochina in the shrub layer, Trachelospermum jasminoides and Euphorbia humifusa in the vine layer, Carex breviculmis and Deyeuxia arundinacea in the herb layer. 3) The standard deviation(SD) ranking of niche breadth in all layers was as follow: vine layer > shrub layer > herb layer > sapling layer > tree layer. The arithmetic mean ranking of niche overlap in all layers was as follow: tree layer(0.621) > vine layer(0.430) > sapling layer(0.408) > shrub layer(0.406) > herb layer(0.364), and their SD were 0.14, 0.20, 0.19, 0.22 and 0.16, respectively.【Conclusion】These indicated the preference and capability of using resource were more similar among the main tree species in the tree layer under the coniferous and broad-leaved mixed forest on Zijin Mountain.
作者
陈霞
袁在翔
金雪梅
关庆伟
朱军
戴康龙
赵宸
CHEN Xia;YUAN Zaixiang;JIN Xuemei;GUAN Qingwei;ZHU Jun;DAI Kanglong;ZHAO Chen(Dr.Sun Yatsen Mausoleum Administration,Nanjing 210014,Jiangsu,China;College of Biology&Environment,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;Co Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,Jiangsu,China)
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2020年第8期113-119,共7页
Journal of Central South University of Forestry & Technology
基金
南京市建设系统科研计划项目(Ks1501)
江苏省高校优势学科建设工程项目(PAPD)。
关键词
生态位宽度
生态位重叠
植物种群
针阔混交林
niche breadth
niche overlap
plant population
coniferous and broad-leaved mixed forest
