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By R. Ben-David, A. Yair (auth.), Siegmar-W. Breckle, Aaron Yair, Maik Veste (eds.)
Sand dune dynamics performs a key position in lots of arid deserts. This quantity offers a synthesis of a selected sand dune environment, the Nizzana web site within the Negev desolate tract. Describing its weather and geophysical/geochemical homes of soils, geological background, natural world, and past/present land-use styles, it elucidates ecological and geomorphological tactics and their interrelations, in keeping with long term tracking, in situ experiments and satellite tv for pc imagery. specific recognition is attracted to the impression of the topsoil organic crust in controlling water availability at local/regional scales. The interdisciplinary strategy followed thus research deals a very good instance of a hugely advanced and dynamic procedure, which can simply be utilized to different sandy ecosystems.
This is a precious resource of data for soil ecologists and microbiologists, conservation biologists, barren region ecologists and geographers, geomorphologists, soil scientists and climatologists, teachers, coverage makers and others attracted to deserts and desertification.
Read Online or Download Arid Dune Ecosystems: The Nizzana Sands in the Negev Desert PDF
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Extra info for Arid Dune Ecosystems: The Nizzana Sands in the Negev Desert
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The Mt Qeren anticlinal (Fig. 1) separates the alluvial belt from the Haluza-Agur sand field, which represents the eastern sector of the extensive Sinai erg in Egypt. 1 Late Geological History Tertiary Era The present landscape is the result of a multistage evolution following the development of an extensive peneplain during the Oligocene-Miocene (Issar 1961; Zilberman 1992). -W. Breckle et al. ) Arid Dune Ecosystems. Ecological Studies 200, © Springer-Verlag Berlin Heidelberg 2008 9 10 R. Ben-David, A.
6, this volume). Since vegetation accompanies all VLDs worldwide, it can be assumed that their formation is related to vegetation. When vegetation is removed from the linear dunes, the pattern changes to the braided form (Figs. 9). Vegetation is not a solid obstacle to sand-moving winds, and sand tends to penetrate and to be trapped Fig. 9 Aerial photographs of VLDs in the eastern Sinai (immediately west of Sde Hallamish) where all vegetation has been removed as a result of human activities (grazing, agriculture, shrub gathering).
In contrast to winter and spring, the summer winds ensue from a constant synoptic condition corresponding to a difference in pressure between the Mediterranean and the Negev during the daytime. As a result, a sea breeze is developed that blows regularly everyday from the north–northwest, from noon until the early evening. The summer storm winds are of low magnitude (usually not above 8 m/s) and show a high degree of constancy, while the winter and spring storm winds are of high magnitude (up to 20 m/s) and low constancy.