Complex sentence: In Chile and Argentina they are more numerous in Patagonian regions, in places like the Torres del Paine National Park, and Isla Grande de Tierra del Fuego have more robust populations, since there are limitations on grazing competition from livestock.
Split into simpler sentences: In Chile and Argentina they are more numerous in Patagonian regions, in places like the Torres del Paine National Park, and Isla Grande de Tierra del Fuego. In these areas they have more robust populations, since there are limitations on grazing competition from livestock.