|
Document Type |
: |
Article In Journal |
|
Document Title |
: |
Hema System: Traditional Conservation of Plant Life in Saudi Arabia الأحمية كنظام تقليدي للحفاظ على الحياة النباتية بالمملكة العربية السعودية |
|
Subject |
: |
Ecology |
|
Document Language |
: |
English |
|
Abstract |
: |
Traditional conservation of plant life by the hema system has
been successfully achieved in the SW mountainous region of Saudi Arabia.
The unwritten, but very respectable rules of the tribe are, in fact, the most
effective factor that keeps on the running of the system since pre-Islamic
era.
Three representative hemas, namely: Hema Bani Sar, Hema Thamala
and Hema Sakhayet, have been studied ecologically. The plant cover and
soil characteristics in- and outside the hemas (Ahmia) vary considerably.
Overgrazing outside the hemas has bad effect not only on the plant life but
also on the soil development. Inside the hemas, the condition of the plants
differ according to the state of grazing. In the main channel and on the lower
zones of the side-slopes of Hema Sakhayet and Hema Thamala, where grazing
is allowed only for cattle, the aerial parts of the grazeable plants (mainly
grassesa) re absent. On the higher zones of the slopes,t he grassesa nd other
plants grow well. In Hema Bani Sar, where grazing is strictly prohibited for
all livestock, the vegetation, in general, is relatively ricker and the soil
shows no symptoms of erosion. |
|
ISSN |
: |
1012-1319 |
|
Journal Name |
: |
Science Journal |
|
Volume |
: |
2 |
|
Issue Number |
: |
1 |
|
Publishing Year |
: |
1410 AH
1990 AD |
|
Number Of Pages |
: |
22 |
|
Article Type |
: |
Article |
|
Added Date |
: |
Sunday, October 11, 2009 |
|
Researchers
| محمود عبدالقوي زهران | M. A. ZAHRAN | Researcher | | |
| حسين احمد يونس | H. A. YOUNES | Researcher | | |
|