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Vegetation Arcs in Jordan

L. P. White
Journal of Ecology
Vol. 57, No. 2 (Jul., 1969), pp. 461-464
DOI: 10.2307/2258392
Stable URL: http://www.jstor.org/stable/2258392
Page Count: 5
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Vegetation Arcs in Jordan
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Abstract

Vegetation arcs occurring in the Jordan desert are described. They occur in very low rainfall areas on highly saline and alkaline alluvial flats that are liable to periodic inundation. The main components of the arcs are xerophytic and halophytic shrubs growing on wind-accumulated hummocks. The contiguous hummocks act as check-dams to sheetwash, concentrating water and causing marked local leaching of soluble salts. The arcs appear to be a primary colonization rather than remnants of a previously more extensive vegetation. It is suggested that they may have formed by lateral extension from sites more favourable to plant growth.

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