江苏宜兴市龙池山银缕梅种群的生态位研究

以江苏省无锡市宜兴林场龙池山的银缕梅种群为研究对象,通过5块调查样地,采用7个计算公式,对生态位开展了研究,结果表明:江苏宜兴市龙池山群落中银缕梅的生态位宽度小于青冈和其它阔叶树种;银缕梅与青冈、银缕梅与其它阔叶树、青冈与其它阔叶树的生态位相似性比例均小于0.5;银缕梅、青冈及其它阔叶树种间生态位重叠值的大小反映了各树种在不同层次上利用资源的相似程度;按Shannon-Wiener公式计算的生态位宽度比按Levins公式计算的生态位宽度更能体现树种间生态位的差别;青冈在群落中是优势种群,而银缕梅居于次要和从属的地位.

The Niche Study of Shaniodendron subaequale Population of Longchi Mountain

In this paper we take Shaniodendron subaequale population at forestry farm in Jiangsu province for example and study the niche based on the information by investigating 5 spots and adoping 7 measuring formulas.The niche breadth of Shaniodendron subaequale(Chang) Deng,Wei et Wang is smaller than that of Cyclobalanopsis glauca and other broad-leaved species in this population.The ratio of the niche similarity of SS(Shaniodendron subaequale) and CG(Cyclobalanopsis glauca),SS and other broad-leaved species,CG and other broad-leaved species is lower than 0.5.The niche overlap values among SS,CG and other broad-leaved species embody the similarity degree of resources used in different layers of various trees.The niche difference of trees based on the niche breadth equation of the Levins is more significant than that based on the niche breadth equation of the Shannon-Wiener.The population of CG is predominant in the community while the population of SS is subordinate and appurtenant.