四川龙门山西北部植被分布与地形因子的相关性

Correlations between vegetation distribution and topographical factors in the northwest of Longmen Mountain,Sichuan Province.

在利用GIS技术提取地形统计数据的基础上,采用关联分析和因子分析法对四川龙门山西北部的植被分布与地形因子的相互关系进行了分析。结果表明,在该区域内,植被分布与地形因子均有显著关联。其中地形因子中的海拔对植被分布的影响最大,其第一主分量的因子载荷达到0.929,充分体现了其通过影响温度条件而限制植被分布的特点。此外,植被分布还受坡度及坡向的影响,二者在第二主分量和第三主分量中的因子载荷分别为0.989和0.998,这体现了它们通过影响水分和光照条件从而间接影响植被生长发育的特点,但由于其变化幅度不大,对植被分布的影响小于海拔因子。

Employing the statistical topographical data obtained from remote sensing images and by GIS technique,and with the methods of Crosstabs analysis and factor analysis,this paper studied the correlations between vegetation distribution and topographical factors in the northwest of Longmen Mountain,Sichuan Province.The results showed that in this area,vegetation distribution had a significant correlation with topographical factors,among which,altitude was the most important,with its loading value in the first m...