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Vegetation: Environmental Relationships in the Bed of Wadi El-Sheikh of Southern Sinai
R. El-Ghareeb and M. A. Shabana
Vol. 90, No. 2 (Nov. 30, 1990), pp. 145-157
Published by: Springer
Stable URL: http://www.jstor.org/stable/20038698
Page Count: 13
You can always find the topics here!Topics: Wadis, Vegetation, Ordination, Soil water, Soil organic matter, Gravel, Desert soils, Judaica, Deserts, Species
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This study deterines the magnitudes of variation in the phytosociological structure in the bed of Wadi El-Sheikh of Southern Sinai. It evaluates the relationships between its vegetation and environment. Vegetation and soil were sampled in 68 stands representing physiographic variations in the study area. Relative frequency, density and coverage were determined for each perennial and were added to provide an estimate of its importance value. The stands were classified by the mutual information method. The principal components analysis was applied to achieve a two-dimentional ordination of stands. Determinations of the percentages of surface sediments of different size classes, soil pH, conductivity, moisture content, water-holding capacity, CaCO₃ and organic matter were carried out. The classification and ordination resulted in a clear demonstration of the vegetation pattern in the study area in quantitative terms. Other phytosociological groups were characterized in addition to those identified in previous studies. Vegetation analysis indicated that it is dominated by Artemisia judaica, Zilla spinosa, Fagonia tristis var. boveana and Lygos raetam. Factors influencing the distribution of vegetation fall into two important groups, one includes the moisture factors and the other includes factors of soil fertility.
Vegetatio © 1990 Springer