Indian colonies are especially common in Nevada. As the Great Basinecosystem is very fragile, native lifeways became untenable soon after white settlement due to livestock over-grazing, water diversions and the felling of Pinyon pine groves. At that time there were few official reservations in the area, and those were terribly run even by contemporary standards. Many Native Americans chose instead to seek jobs in white ranches, farms and cities. The areas in which they settled became known as Indian Camps or Colonies. In some cases they owned the land they settled on, in other cases they settled on public land. Starting in the early twentieth century, the federal government began establishing Indian trust territories for the colonies on public land.