Floristic Diversity and Vegetation Analysis of Wadi Sudr, South-West Sinai Peninsula.

This study evaluated the effect of edaphic factors on species diversity and distribution of vegetation in Wadi Sudr, Sinai Peninsula. The study included 21 stands, 54 speciesbelonging to 44 genera and representing 22 families, where the abundant family was Zygophyllaceae comprising 15% of the total number of the recorded species. Chamaephytes were the dominant life forms in the studied Wadi (55.56%). Chorological analysis showed the dominance of the monoregional Saharo-Arabian chorotype (46.3%). TWINSPAN classification separated five vegetation groups which included: (I) Zygophyllum album, (II) Haloxylon salicomicum, (III) Retama raetam, (IV) Reaumuria hirtella and (V) R raetam. CCA analysis indicated that the vegetation group representing the downstream of Wadi Sudr was affected by soil chemical properties, whereas CaC03% and physical properties affected the vegetation groups representing the up and midstream parts of the Wadi.