Ecoregions of South America

The Atacama Desert, stretching along Chile's Pacific coast, is Earth's most arid non-polar environment, where some weather stations have never recorded measurable rainfall. Despite its reputation as a lifeless wasteland, the Atacama supports remarkable biodiversity, unique geology, and Indigenous cultures that have adapted to survive here for millennia, while its pristine skies and mineral wealth have made it a global center for astronomy, mining, and the ongoing tension between resource extraction and conservation.

Nestled in the sun-drenched interior of northeastern Brazil, the Caatinga, derived from Tupi meaning "white forest," showcases remarkable adaptability in challenging environments. This biome, with distinctive xerophytic vegetation, forms South America's largest continuous dry forest, representing nearly 10% of Brazil's landmass. Far from a barren wasteland, the Caatinga supports a specialized web of ecosystems, rich in biodiversity with many endemic species adapted to its harsh conditions.

The Cerrado, a sprawling savanna ecoregion that blankets the heart of Brazil and spills over into eastern Bolivia and northeastern Paraguay, represents a realm of breathtaking biodiversity and ecological complexity often overshadowed by its more famous Amazonian neighbor. Far from being a uniform expanse of grasslands, this vast landscape is a captivating mosaic of habitats, ranging from dense gallery forests lining waterways to open grasslands dotted with gnarled, fire-adapted trees and seasonally flooded wetlands.

Stretching across the expansive lowlands east of the towering Andes Mountains in northwestern South America, the Llanos emerge as a vast tropical grassland plain of remarkable ecological dynamism. Embracing a significant portion of both Colombia and Venezuela, this ecoregion of seasonally flooded savannas and gallery forests presents a vivid portrait of natural grandeur sculpted by the powerful Orinoco River system and the dramatic shifts between wet and dry seasons. The Llanos represent a crucial biome, essential for its environmental significance, its role in regional hydrology, and its economic importance to the nations it spans.

The Pantanal, the world's largest tropical wetland, unfolds as a colossal seasonal floodplain predominantly situated within Mato Grosso and Mato Grosso do Sul in Brazil's Center-West Region. However, its expansive reach extends into northeastern Paraguay and southeastern Bolivia, creating an ecological masterpiece that captivates with its diverse landscapes and vibrant ecosystems. This remarkable wetland, a dynamic region with distinct hydrological, geological, and ecological features, supports a rich array of wildlife and plant species.

The Patagonian Steppe, stretching across southern South America, is a significant temperate grassland ecosystem. This semi-arid landscape, shaped by the Andes and strong westerly winds, extends from the Colorado River in Argentina to the Strait of Magellan, covering parts of Argentina and Chile with windswept plains, volcanic plateaus, and shrublands. Often mischaracterized as barren, it supports rich biodiversity and unique ecological adaptations, serving as the economic backbone of South America's pastoral regions.