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Volume :27 Issue : 103 2001      Add To Cart                                                                    Download

QUANTITATIVE ASSESSMENT OF VEGETATION SIZE AND DISTRIBUTION OF ASSIR HIGHLANDS (SOUTH-WEST OF SAUDI ARABIA)

Auther : Dr. Marei Hussain Al-Qahtani

 
 

The findings reveal that floristic diversity of the research area is low.  Only 62 perennial species belonging to 49 genera and 28 families were recorded in Assir Highlands.  Of these, only 8 species (Acacia arabica, Acacia gerradil, Accia negril, Lycium shawii, Dodonaea viscose, Kleinia odeora, Juniperus procera and Euryops arabicus) or 12.9% of all species recorded, account for 89% of the absolute frequency of species in the research area.  Although the vegetation density in this area is low (2.71/100 m2), it is considered relatively high compared with other areas in Saudi Arabia.  Classification of samples and species using the TWINSPAN program led to identification of 14 important plant groups.  The floristic composition and distribution of main plant groups were found to reflect the conditions of soil and the topographical variety in Assir highland.

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