地形和空间距离对温带落叶阔叶林物种β多样性的影响

摘要

研究基于样方植物调查数据,采用线性回归分析了全部物种及乔木、灌木和草本植物的β多样性格局,采用方差分解探索了地形和空间距离对物种β多样性的贡献.结果表明,随着样方间海拔差和空间距离的变化,物种相异系数的值呈增大趋势,地形因子的贡献要远大于空间距离,乔木、灌木和草本的扩散率存在差异.通过研究了解了物种沿着海拔和空间距离的β多样性格局,同时表明地形相对于空间距离对物种变化起着更为重要的作用,乔木的变化速率高于灌木,灌木高于草本.%This study analyzed the beta diversity pattern all species in arbors,shrubs and herbs by the linear regression analysis from the sample plants survey data.Moreover,variance decomposition was chosen to explore the terrain's contribution to the beta diversity of species and space distance.The results showed that,with the elevation differences between samples and the change of the space distance,different coefficient values trended to increase.The terrain factor on different coefficient values was greater than the distance space.The spread of arbor,shrub and herb rate remained the differences.This research revealed the species and distance of beta diversity pattern along the altitude.Meanwhile,these conclusions showed that the terrain space distance effects played a more important role on species.The tree change rate was higher than the shrub,and the shrub was higher than the herb.