藏东南朗县砂生槐空间格局及其种内关联性  

Spatial Pattern and Intraspecific Correlation of Sophora Moorcroftiana in Langxian Country,Southeast Tibet

作　　者：姚慧芳 王超 卢杰[1,2,3] 张萌[1,2,3] 张新生 于德水 郑维列 YAO Huifang;WANG Chao;LU Jie;ZHANG Meng;ZHANG Xinsheng;YU Deshui;ZHENG Weilie(Res.Institute of Tibet Plateau Ecology,Tibet Agriculture&Animal Husbandry University;Key Laboratory of Forest Ecology of Tibet plateau,Ministry of Education;National Key Station of Field Scientific Observation&Experiment of Alpine Forest Ecology System in Nyingchi Tibet,Nyingchi Tibet,860000,China)

机构地区：[1]西藏农牧学院高原生态研究所 [2]西藏高原森林生态教育部重点实验室 [3]西藏林芝高山森林生态系统国家野外科学观测研究站,西藏林芝860000

出　　处：《高原农业》2021年第3期226-231,324,共7页Journal of Plateau Agriculture

基　　金：科技部国家野外科学研究观测站(生态系统)运行补助项目(西藏林芝高山森林生态系统国家野外科学观测研究2015-2020);西藏农牧学院研究生创新计划项目(YJS2020-29)。

摘　　要：本研究旨在分析不同冠幅级砂生槐空间分布格局及其种内关联性。选用点格局分析方法中的Ripley L函数,结果表明:(1)优势种砂生槐在0~25 m的空间尺度上表现为集群分布—随机分布—均匀分布。(2)砂生槐种群属于增长型,小灌木(C<1 ㎡)在0~19 m的空间尺度内表现为集群分布,在19~25 m的空间尺度上呈随机分布;中灌木(1 ㎡≤C<3 ㎡)随空间尺度的增大表现为随机分布—集群分布—随机分布—均匀分布—随机分布;大灌木(C≥3 ㎡)在整体尺度上都呈随机分布。(3)砂生槐的种内关联性以不相关和负相关为主,小灌木和中灌木的空间关联性较多样,表现为不相关—负相关—不相关—负相关;小灌木和中灌木、中灌木和大灌木几乎在整体空间尺度上都呈不相关,其关联性较小。This experiment was to analyze the spatial distribution pattern and intraspecific association of different canopy classes of Sophora moorcroftiana,and the Ripley L function in point pattern analysis was selected.The results showed that:(1)the dominant species of S.moorcroftiana exhibted cluster distribution—random distribution—uniform distribution on the spatial scale of 0~25 m;(2)S.moorcroftiana population belonged to the growth type,small shrubs(C<1 ㎡)in 0~19 m spatial scale showed cluster distribution,and in 19~25 m spatial scale showed random distribution;the middle shrub(1 ㎡≤C<3 ㎡)showed random distribution-cluster distribution-random distribution-uniform distribution-random distribution with the increase of spatial scale;large shrubs(C≥3 ㎡)were randomly distributed on the overall scale;(3)the intraspecific association of S.moorcroftiana was mainly non-correlated and negative correlation,and the spatial association of small shrub and middle shrub was diverse,showing non-correlated-negative correlation-non-correlated-negative correlation;small shrubs and middle shrubs, middle shrubs and large shrubs were almost irrelevant in the overall spatial scale, and the correlation is small.

关 键 词：砂生槐 种群空间分布 物种关联性 

分 类 号：S718.5[农业科学—林学]