宝天曼木本植物群落数量排序与环境解释

Quantitative ordination and environmental analysis of woody plant communities in Baotianman,Henan Province

研究选取14个分别代表植被群落、地形因子、土壤因子的指标,利用宝天曼自然保护区32块样地资料,研究了物种分布与环境之间关系。采用DCCA法可将该地区木本植物群落划分为3个类型;物种与9个环境因子之间存在显著的相关关系,前4轴可解释物种总变异的94.1%;海拔、坡度、土壤含水量、坡向是影响该地区物种分布的主要因子,其中海拔是指示物种分布变化的最敏感因子。不同指标集团的典型相关分析结果表明:地形与植被因子之间、土壤因子与植被因子之间第1对典范相关系数分别为0.712和0.783,存在着显著的相关关系,影响植被特征的最重要地形因子是海拔和坡度,土壤因子为土壤厚度和土壤含水量,而对地形和土壤反应最敏感的植被指标分别为林分密度和平均树高,群落分布状态是由地形和土壤因子共同作用所控制的。

Relationship between species distribution and environmental factors was studied,data from thirty-two sample plots of the Baotianman Nature Reserve in Henan Province were obtained and analyzed according to fourteen indexes which separately represents for plant communities and terrain factors as well as soil features.Woody plant communities could be identified into three types species,species and environmental factors had a significant correlation and 94.1% of total variations of species could be explained by the four Axis,And the main factors that effected species distribution were elevation,slope and soil water content as well as aspect,especially elevation according to detrended canonical correspondence analysis method.Results of canonical correlation analysis showed that the first canonical correlation coefficients for terrain and plant facors（0.712）,soil and plant factors（0.783） were significant,and the most important factors that influenced plant feactures were elevation,and slope soil tickness and soil water contains,and the striking indexes that describes terrain and soil factors were tree density and average tree above level,and the community distribution condition depent on the interactions of terrain and soil factors.