云南富源光皮桦种群与主要伴生树种生态位研究  

Study on Niche of Betula luminifera Population and Its Main Associated Tree Species in Fuyuan,Yunnan

作　　者：孟广涛[1] 柴勇[2] 方向京[2] 和丽萍[2] 张正海[2] 李贵祥[2] 刘文辉 

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]云南省林业科学研究院,云南昆明650204 [3]云南富源县林业局,云南富源655500

出　　处：《南京林业大学学报（自然科学版）》2006年第2期63-66,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家"十五"重点科技攻关项目(2000-k01-04-05)

摘　　要：运用Levins和Shannon-Wiener生态位宽度指数,对云南富源县光皮桦种群及其主要伴生树种的生态位进行了研究。结果表明:光皮桦生态位宽度最大,杉木、华山松次之,其他主要伴生树种的生态位宽度均较小,表明光皮桦对环境具有广泛的适应性,在群落中优势地位明显。光皮桦与杉木、华山松的生态位相似性比例较大,对资源有共享趋势;光皮桦与其他树种的生态位相似性比例较小。光皮桦群落中主要树种间的生态位重叠较低,表明主要树种间生态位分化程度较高,种间竞争关系较弱。Using Levins and Shannon-Wiener niche breadth index, the niche of Betula luminifera population and its main associated tree species in Fuyuan County, Yunnan was studied. The results showed that B. luminifera had the biggest niche breadth. The niche breadth of Cunninghamia lanceolata, Pinus armandi ranks second. The niche breadth of other associated tree species was smallest. It indicates that B. luminifera has extensive adaptation to environment and it is the dominant species in the community. The niche proportional similarity between B. lumini f era and C. lanceolata, P. armandi was larger, showing that B. lumini fera and C. lanceolata, P. armandi had greater resource-sharing degree. But the niche proportional similarity between B. luminifera and most of other associated tree species were small. The niche overlap between most of tree species in B. luminifera community were smaller, which indicated a higher niche polarization of main tree species and a weaker competition in B. luminifera community.

关 键 词：光皮桦 伴生树种 生态位宽度 生态位相似性比例 生态位重叠 

分 类 号：S718[农业科学—林学] Q948.1[生物学—植物学]