Latin America's vast plains systems drive agriculture, biodiversity, and cultural identity across the continent.
Countries: Argentina, Paraguay, Bolivia, Brazil.
Character: Semi-arid to humid transition. Thorn scrub, quebracho forests, palm savannas. Seasonal flooding (Pilcomayo, Paraguay rivers).
Economy: Cattle ranching, cotton, soy expansion. Deforestation hotspot. Indigenous: Wichí, Qom, Enxet.
Countries: Colombia (Orinoquía), Venezuela.
Character: Tropical savanna. Distinct wet (May-Oct, flooded) / dry (Nov-Apr) seasons. Gallery forests along rivers.
Economy: Extensive cattle (criollo breeds), rice, oil (Orinoco Belt). Llanero culture (joropo music, coleo sport).
Countries: Argentina (primarily), Uruguay, southern Brazil.
Character: Temperate grassland. Deep mollisols (world's best soils). No dry season. Fire-maintained historically.
Economy: Argentina's breadbasket: wheat, corn, soy, beef, dairy. Gaucho culture. Urban pressure (Buenos Aires sprawl).
Country: Brazil (central).
Character: Tropical savanna mosaic: grassland, cerrado sensu stricto, cerradão woodland, veredas wetlands. 5% Earth's biodiversity. Ancient, nutrient-poor soils.
Economy: Soy frontier (world's largest), beef, ethanol (sugarcane). 50% converted. Water tower for major basins.
Countries: Argentina (mainly), Chile.
Character: Cold desert/steppe. Rain shadow of Andes. Basalt plateaus, coiron grass, calafate bushes. Guanacos, rheas, pumas.
Economy: Sheep ranching (wool), oil/gas, wind farms, tourism (Torres del Paine, Perito Moreno).
Narrow (10-200km) Atlantic fringe. Restinga (sand dune forest), mangroves, Atlantic Forest fragments. 50M+ population. Ports, tourism, industry.
Andean foothills (Bolivia/Argentina). Cloud forests, extreme biodiversity, coca cultivation (traditional/illicit), coffee, citrus. Steep, landslide-prone.