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There are five main habitat types at OBR: coastal dunes, inland ridges, saline depressions, nonsaline depressions, and an inland plateau. The area is located in a warm desert and semi-desert ecosystem with coastal calcareous dunes consisting of Ammophila arenaria, Euphorbia paralias, Pancratium maritimum etc.; inland ridges with skeletal shallow soils characterized by either Thymellaea spp. and Gymnocarpus decadrum communities or by associations of Plantago albicans and Asphodelus microcarpa; saline marshy depressions dominated by Salicornia fruticosa, Cressa cretica, Atriplex halimus etc.; non-saline depressions and inland plateau including species such as Artemisia monosperma and Hammada elegans associations (calcareous soils), Anabasis articulata and Hammada scorpia (shallow degraded soils) and Suaeda pruinosa and Salsola tetrandra communities (saline soils); pasture land, fig plantations; agroecosystems.Environmental constraints comprise land degradation, habitat fragmentation, overgrazing, loss of biodiversity, salinization of soil, and over exploitation of mineral and water (ground water) resources. The area is undergoing a serious transformation process form natural rangelands to agricultural lands, particularly after the extension of an irrigation canal and an extended irrigation networks from the Nile. The availability of irrigation water has influenced the whole lifestyle of the local community and has created conflicts in land tenure due to the increase in land prices.