基于养分资源轴的锐齿栎林主要种群生态位研究  

Study on niche of main population of Quercus aliena var.acuteserata forest based on the nutrient resource axis on Mt.Xiaolongshan in Gansu

作　　者：王勤花[1] 巨天珍[1] 索安宁[2] 张俊华[3] 

机构地区：[1]西北师范大学地理与环境科学学院,甘肃兰州730070 [2]北京师范大学生命科学学院,北京100875 [3]兰州大学资源环境学院,甘肃兰州730000

出　　处：《西北师范大学学报（自然科学版）》2005年第6期61-65,共5页Journal of Northwest Normal University(Natural Science)

基　　金：西北师范大学科技创新工程资助项目(NWNU-KJCX-02-20);甘肃省教委研究项目(031-28)

摘　　要：以Levins和Shannon-Wiener生态位宽度及Pianka重叠指数为依据,将土壤有机质、土壤pH值、土壤全N分别作为反映各主要种群生长环境的资源轴,对小陇山锐齿栎林的10个主要种群生态位宽度和生态位重叠进行了研究.结果表明,各主要种群在3个资源轴上的生态位宽度均较大,生态位宽度平均最大值出现在有机质资源维上,平均最小值出现在全N资源维上;各主要种群在3个资源维上的重叠都较大,说明了各主要树种间利用资源的方式较为相似,表明种群间利用资源的竞争排斥作用较为强烈,彼此之间容易造成在各资源维上的竞争;在3组资源轴中,锐齿栎的生态位宽度均为最大,说明锐齿栎种群对各资源的利用充分,适应性强.The niche breadth, and niche overlaps of 10 main trees species in the Mountain Xiaolong in Gansu were measured using the formula proposed by Levins, Shannon-Wiener and Pianka. Organic matter, pH and total nitrogen were used as the resource axis to reflect the growing environment of Quercus aliena var. acuteserata forest. The results showed as the follow： the niche breadth of main population in three resource axis are breader, average maximum appears on organic matter resource axis, and average minimum appears on total N resource axis. The niche overlaps of main population in three resource axis relatively bigger, and the way to utilize resource is comparatively similar, which indicate population competition of resource comparatively is strong, so apt to cause the competition on every resource each other. Among three group resource axis, the niche width of Quercus aliena var. acuteserata is the largest, proved that Quercus aliena vat. acuteserata is abundant in use every resource and have a good adaptability.

关 键 词：生态位宽度 生态位重叠 甘肃小陇山 

分 类 号：Q948[生物学—植物学] S181[农业科学—农业基础科学]