أثر اتجاه ميل المنحدرات على كثافة و تنوع الغطاء النباتي الطبيعي في المزار الجنوبي محافظة الكرك

الملخص EN

This study aimed a evaluating the effect of topographic slopes aspect on the density and diversity of the rangelands components at five transects selected from three areas situated in the south and southwest directions of Al-Mazar Al- Janoubi of AL-Karak Governorate during 2008/2009.

This aim was achieved through analyzing the direct effect of slope aspect on physical and chemical soil characteristics that appeared on vegetation density, diversity and its spatial distribution, and on some morphological species characteristics.

Statistical techniques (Simple Linear Correlation, Linear Regression, Step wise Regression) were applied on evaluating the direct effect of slope aspect on density and diversity of 45 vegetation sample selected of about (5 × 5 meter) for each sample along five topographic transects of the targeted area, in addition to evaluating the indirect effect of aspect factor on vegetation density and diversity and other characteristics through its effect (Aspect) on the physical and chemical soil characteristics as one of the natural vegetation elements .

The study revealed some results, the most important at which is: Northern slopes exhibited richness in the vegetation density compared to southern slopes.

On the other hand, no variation has been noted on vegetation diversity for both slopes.