南京城市边缘次生林主要乔木种群生态位分析  

Analysis on the Niches of Main Arbor Trees in the Secondary Forest at the Edge of Nanjing City

作　　者：谢春平[1] 方彦[1] 袁永全 赵颖中 

机构地区：[1]南京森林警察学院物证鉴定中心,南京210046 [2]剑阁县林业和园林局,四川广元628317 [3]古蔺县林业局,四川泸州646509

出　　处：《四川农业大学学报》2012年第1期7-11,17,共6页Journal of Sichuan Agricultural University

基　　金：国家林业公益性行业科研专项(201004094)

摘　　要：以物种重要值为生态位计算资源状态指标,应用Levins公式、Hurtlbert公式、Pianka公式和Schoener公式,对分布于南京城市边缘次生林群落乔木层主要树种的生态位宽度、生态位重叠和生态位相似性比例的计算与分析。结果表明:①该次生林群落中,朴树、马尾松、短柄枹栎和构树具有较大的生态位宽度,它们的Levins和Hurlbert生态位宽度指数值分别为0.594、0.581、0.560、0.481和0.463、0.414、0.391、0.341。②Pianka生态位重叠值表明,NO<0.5的种对共有34对,占总数的75.56%,这说明了群落物种对资源的偏向性和生态位分化趋势的存在。③从Schoener生态位相似性比例来看,Cih≥0.5的种对有10对,仅占全部种对的22.22%,说明物种之间对资源的需求趋同性不高。④从生态位各指数的结果可以看出,群落将由初期的马尾松林演替至落叶阔叶林。In order to analysis the arbor tree niche in the secondary forest at Xianlin,Nanjing in China,the breadth,overlap and similarity of niche were calculated with Levins,Hurtlbert,Pianka and Schoener formulas according to the importance value of arbor tree.The results indicated that： ① Higher niche breadths were observed in the populations of Celtis sinensis,Pinus massoniana,Quercus serrata var.brevipetiolata,and Broussonetia papyrifera compared with other populations.Levins（Bi） and Hurlberts＇（Ba） values were 0.594,0.581,0.560,0.481 and 0.463,0.414,0.391,0.341 respectively.② There were 34 species pairs with NO0.5 according to Pianka value,which accounted for 75.56% of the total investigation,implying niche differentiation in species.However.③ There are only 10 species pairs（22.22% of the total） with Cih≥0.5 by the calculations from Schoener,which suggested low similarity in resource requirement.④ These results revealed that the forest could be going to succeed from Pinus massoniana forest to deciduous broad leaved forest.

关 键 词：生态位 主要乔木树种 次生林 城市边缘 

分 类 号：S718.5[农业科学—林学]