Patagonian Desert albeit to the west, where precipitation is higher, bushes are replaced by grasses. Topographically the deserts consist of alternating tablelands and massifs dissected by river valleys and canyons. The more western parts of the steppe host lakes of glacial origin and grades into barren mountains or cold temperate forests along valleys. Inhabited by hunter-gatherers since Pre-Hispanic times, the desert faced migration in the 19th century of Mapuches, Chileans, Argentines, Welsh, and other European peoples, transforming it from a conflictive borderland zone to an integral part of Argentina, with cattle, sheep and horse husbandry being the primary land uses. The Patagonian
Patagonian Welsh now bilingual in Welsh and Spanish. The Welsh people first arrived in Patagonia in 1865. They had migrated to protect their native Welsh culture and language, which they considered to be threatened in their native Wales. Over the years the use of the language started to decrease and there was relatively little contact between Wales and the Chubut Valley. The situation began to change when many Welsh people visited the region in 1965 to celebrate the colony's centenary; since then the number of Welsh visitors increased. In 1945 and 1946 the BBC World Service broadcast radio shows in Patagonian Welsh.