云南轿子雪山种子植物多样性分布格局  

Distribution Pattern of Seed Plants Diversity of Jiaozi Snow Mountain,Yunnan

作　　者：解应波 董洪进 李新辉 杨涛 XIE Yingbo;DONG Hongjin;LI Xinhui;YANG Tao(College of Ecology and Enuiranment,Southwest Forestry University,Kunming 650224,China;Huanggang Normal University,Huanggang 438000,China;Guizhou University of Traditional Chinese Medicine,Guiyang 550025,China;School of Ecology and Environment Science,Yunnan University,Kunming 650504,China)

机构地区：[1]西南林业大学生态与环境学院,昆明650224 [2]黄冈师范学院,湖北黄冈438000 [3]贵州中医药大学,贵阳550025 [4]云南大学生态学与环境学院,昆明650504

出　　处：《森林工程》2020年第6期1-8,共8页Forest Engineering

基　　金：国家自然科学基金(31560063,31860126)。

摘　　要：为探讨轿子雪山区域种子植物海拔梯度的分布格局,采用物种丰富度Shannon指数来解析植物alpha多样性,Bray-curtis指数来解析植物beta多样性,采用距离矩阵多重回归方法和方差分解方法,阐述该范围内种子植物alpha多样性和beta多样性与环境因子(年平均降雨量、年平均温度、坡向、坡度、岩石和土壤)之间的关系。结果表明:①本区种子植物属和种的丰富度整体上随着海拔的升高呈现先增加后减小的单峰趋势,最大值出现在海拔3000 m左右,并且在3500 m和3900 m有2个小峰;②alpha多样性与土壤类型、岩石类型、年平均温度和年平均降雨量有显著的线性关系;其坡度、土壤与坡向的组合解释了轿子雪山种子植物alpha多样性85%的变异;③所有的环境因子与beta多样性之间都具有极显著的线性关系,岩石类型、年平均降雨量和年平均温度这3个因子尤为显著。其中,年均降水差异与岩石类型差异解释了轿子雪山种子植物beta多样性90%的变异。本研究得出轿子雪山的种子植物多样性主要是在气候、土壤和地形三重影响下形成的,因此环境因子作用过程对本区域群落的构成具有决定性的影响。To explore the pattern of species richness along with the altitudinal gradient in the Jiaozi Snow Mountain,species richness,Shannon index,and Bray-curtis index were used to quantify taxonomic alpha diversity and beta diversity.Then these indices were related to annual mean temperature,annual mean recipitation,slope,aspect,lithology and soil type by applying multiple regression on distance matrices(MRM)and variance partition.The results showed that:①The species richness increased rapidly at the first and then decreased with increasing elevation,peaking about at 3000 m while another 2 small peaks at 3500 m and 3900 m;②Annual mean temperature,annual mean precipitation,rock and soil types were significantly related to Shannon index.The 85%of variation in the alpha diversity can be explained by the composed of soil,slope and aspect;③All the environmental factors were significantly related to beta diversity.The three factors of rock type,annual average rainfall and annual average temperature were particularly significant.The 90%of variance in the beta diversity can be explained by annual average precipitation differences and rock type differences.The results highlighted the combinational effect of the climate,soil and topography to the seed plant diversity in Jiaozi Snow Mountains,so the niche process made a great effect to the community species composition in this area.

关 键 词：轿子雪山 种子植物 alpha多样性 beta多样性 海拔梯度 

分 类 号：S718[农业科学—林学]