Puna grassland
The Puna grassland ecoregion, of the montane grasslands and shrublands biome, is found in the central Andes Mountains of South America. It is considered one of the eight Natural Regions in Peru, but extends south, across Bolivia, as far as northern Argentina and Chile. The term puna encompasses diverse ecosystems of the high Central Andes above 3200–3400 m.
Location
The puna is found above the treeline at 3200–3500 m elevation, and below the permanent snow line above 4500–5000 m elevation. It extends from central Peru in the north, across the Altiplano plateau of Peru and Bolivia, and south along the spine of the Andes into northern Argentina and Chile.
Other sources claim that it goes on Suni (high plateaus and cliffs, some agriculture) and from 4000 m to the snow line (permafrost and alpine desert) of Puna grassland (mountain tops and slopes, much colder).
Ecoregions
The puna is a diverse ecosystem that comprises varied ecoregions labeled wet/moist puna, dry puna and desert puna.