Arabian oryx towards Saudi Arabia, and by 1914, only a few survived outside that country. A few were reported in Jordan into the 1930s, but by the mid-1930s, the only remaining populations were in the Nafud Desert in northwestern Saudi Arabia and the Rub' al Khali in the south. In the 1930s, Arabian princes and oil company clerks started hunting Arabian oryx with automobiles and rifles. Hunts grew in size, and some were reported to employ as many as 300 vehicles. By the middle of the 20th century, the northern population was effectively extinct. The last Arabian oryx in the wild prior
Simpson Desert largely intact as the desert is uninhabitable. Therefore, habitats are not threatened by agriculture, but are damaged by introduced species, particularly rabbits and feral camels. The only human activitiy in the desert proper has been the construction of the gas pipelines, while the country on its fringes has been used for cattle grazing and contains towns such as Innamincka. Mound springs and other waterholes are vulnerable to overuse and damage. Protected areas of the ecoregion include the Simpson Desert, Goneaway, Lochern, Bladensburg, Witjira and Kati Thanda-Lake Eyre National Parks as well as the Munga-Thirri—Simpson Desert Conservation Park, Innamincka Regional Reserve