High Quality Content by WIKIPEDIA articles! The Sahara desert ecoregion', as defined by the World Wide Fund for Nature (WWF), includes the hyper-arid center of the Sahara, between 18° and 30° N. It is one of several desert and xeric shrubland ecoregions that cover the northern portion of the African continent.The Sahara is the world's largest hot desert, located in northern Africa. It stretches from the Red Sea to the Atlantic. The vast Sahara encompasses several ecologically distinct regions. The Sahara desert ecoregion covers an area of 4,619,260 km² (1,791,500 square miles) in the hot, hyper-arid center of the Sahara, surrounded on the north, south, east, and west by desert ecoregions with higher rainfall and more vegetation.he Sahara is the world's largest hot desert, located in northern Africa. It stretches from the Red Sea to the Atlantic. The vast Sahara encompasses several ecologically distinct regions. The Sahara desert ecoregion covers an area of 4,619,260 km² (1,791,500 square miles) in the hot,