By R. Ben-David, A. Yair (auth.), Siegmar-W. Breckle, Aaron Yair, Maik Veste (eds.)
Sand dune dynamics performs a key function in lots of arid deserts. This quantity presents a synthesis of a selected sand dune environment, the Nizzana web site within the Negev barren region. Describing its weather and geophysical/geochemical houses of soils, geological historical past, natural world, and past/present land-use styles, it elucidates ecological and geomorphological procedures 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 technique followed for that reason research deals a great instance of a hugely complicated and dynamic procedure, which may simply be utilized to different sandy ecosystems.
This is a useful resource of data for soil ecologists and microbiologists, conservation biologists, barren region ecologists and geographers, geomorphologists, soil scientists and climatologists, academics, coverage makers and others drawn to deserts and desertification.
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Additional info for Arid Dune Ecosystems: The Nizzana Sands in the Negev Desert
By the vegetation. This results in the formation of coppice dunes or nebkhas (Fig. 10), which are sand mounds capped and protected by vegetation. The nebkhas are formed when the sand is free of phytogenic crust. Such a condition occurs on the crest of the dune and the upper south-facing slopes (Fig. 10). In arid areas with low wind energy, such as the Negev, vegetation thrives more easily on sand than on other, finer soils (Chap. 6, this volume). Therefore, additional vegetation will eventually clutch to the shadow lee dune, formed either from a solid obstacle or a shrub, in a process of self-propagation, thereby forming a vegetated linear dune along the direction of the strongest dominant wind.
The fact that the breaching of the sand dams can not be attributed to climatic fluctuations draws attention to the important role that should be attributed to the local surface properties of adjoining basins in the process of breaching sand barriers. It appears that under the rainfall regime prevailing in the area, characterized by a high frequency of low-intensity rain events, the temporal sequence of channel incision across the sand dams will be controlled largely by the hydrological regime of each basin.
Quat Int 5:115–137 Greenbaum N, Ben-David R (2001) Geological-geomorphological mapping in the Shivta-Rogem site area. Data Rep no 3, Israel Electrical Company Harrison JB, Yair A (1998) Late Pleistocene aeolian and fluvial interactions in the development of the Nizzana dune field. Sedimentology 45:507–518 Horowitz A (1988) The Quaternary environments and paleogeography in Israel. In: Yom-Tov I, Tchernov E (eds) The zoogeography of Israel. Junk, Dordrecht, pp 35–57 Imbrie J, Hays JD, McIntyre A, Mix AC, Morley JJ, Pisia NG, Prell WL, Schackelton NG (1984) The orbital theory of Pleistocene climate: support from a revised chronology of marine D 18 record.