Incense Route – Desert Cities in the Negev Road and spice trade routes: Avdat, Haluza, Mamshit, and Shivta. As a group, these desert cities demonstrate the lucrative trade in frankincense and myrrh that took place from Yemen in south Arabia to the port of Gaza on the Mediterranean. At its height, the route included cities, Qanat irrigation systems, fortresses, and caravanserai. Vestiges of these works are still visible, and demonstrate the use of the desert for commerce and agriculture. The Incense Route – Desert Cities in the Negev site comprises the Negev, southern Israel, which connected Arabia to the Mediterranean in the Hellenistic-Roman period. During the period from
Mojave Desert needed for survival in the flora of the Sonoran Desert, which has an overlap in its major flora, such as the creosote bush ("Larrea tridentata"). The soil types in the Mojave and Sonoran deserts are mostly derived from volcano, specifically the areas in California. As the topography goes down, particle sizes decreases as you move down the gradient, where you can also find low alkalinity. These erosional gradient is a habitat for many plant communities. As you go up the gradient of the desert, you will find more pediment and alluvial fan soil. In this areas, the flora is mostly