نوع المستند : المقالة الأصلية
المؤلف
استاذ مساعد بقسم الجغرافيا / کلية العلوم الاجتماعية. جامعة مؤتة
المستخلص
الكلمات الرئيسية
الموضوعات الرئيسية
عنوان المقالة [English]
المؤلف [English]
This study examined the effect of environmental factors ( specifically topography and soil ) on the spatial of the density and diversity of vegetation in the valley of wala / madaba.
Information of vegetation and soil have been collected for 43 quadrate (5*5 meters),along a Wala and Hidan valleys in the west to the upper headwaters at khan ezzabib station in the east. Moreover, 43 soil samples were taken with 30 cm depth. Chemical and physical analysis of some soil features have been conducted which included soil texture, organic component, salinity and, PH.
The study used GPS to estimate vegetations and soil samples Coordinates; and height also it used multivariate linear regression method use in the field survey data analysis to test the effect of the environmental factors on the spatial distribution of density and diversity of vegetation; and reached results:
The study showed the following results:
1. About 79 species of wild vegetation have been recognized and taxonomied in the valley of Wala and it`s tributary At Hidan valley.
2.The effect of topography on the spatial distribution of vegetation density and diversity in the study area, was statistically significant.
3.There was an inverse relationship between elevation and vegetation density in the study area, in spite of that high elevations receive more precipitation. This was caused by overgrazing and increasing surface gradient.
الكلمات الرئيسية [English]
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