Biome / Ecosystem

Amazônia—encompassing the Amazon rainforest, biome, basin, and river system—represents Earth's most magnificent and ecologically vital tropical region. This interconnected complex harbors unparalleled biodiversity while serving as a critical regulator of global climate and weather patterns. Often called "the lungs of the Earth," the four components of this vast region form a self-sustaining, complex ecosystem that has evolved over millions of years.

The Peruvian Amazon, known as "La Selva" (The Jungle), is a remarkable natural treasure, a living cathedral of biodiversity that evolved over millions of years. It stretches from the eastern Andes foothills to borders with Ecuador, Colombia, Brazil, and Bolivia, covering Peru's largest part of the Amazon rainforest, the second-largest in the world after Brazil. La Selva is one of Peru's three main geographic regions, along with the arid Pacific coast (La Costa) and highland Andes (La Sierra).

The Amazon biome extends far beyond the iconic rainforest, encompassing a spectacular mosaic of 53 distinct ecosystems across 6.7 million sq km (2.6 million sq mi). This continental-scale biome is the world's largest tropical biome complex, where dense rainforests give way to seasonal savannas, montane cloud forests, and vast wetlands, each supporting specialized plant and animal communities found nowhere else on Earth.

The Amazon Rainforest, a cornerstone of the vast Amazônia region, stands as nature's most intricate and sophisticated ecosystem, a living masterpiece spanning across the heart of South America. This verdant expanse represents over half of Earth's remaining rainforest. It comprises the most biodiverse tract of tropical forest on the planet, harboring an estimated 390 billion individual trees representing 16,000 distinct species.

Nestled on the Andes' steep slopes in southern South America, the Andean Patagonian Forest is Earth's southernmost forest. Extending across southern Chile and Argentina along the cordillera, it is one of the few relatively undisturbed temperate forests left on Earth. This narrow strip of greenery covers mountain slopes between the Pacific and the arid Patagonian Desert. However, it faces increasing threats from climate change, invasive species, and habitat fragmentation, endangering a unique ecosystem without an equivalent elsewhere.

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.

The Atlantic Forest, or Mata Atlântica, showcases extraordinary biological richness and severe human impact. Once a vast verdant tapestry stretching along Brazil's eastern and southeastern coastline, with tendrils extending into northeastern Argentina and eastern Paraguay, this unique biome has been drastically reduced by centuries of relentless deforestation driven by agricultural expansion, logging, industrial development, and urbanization, leaving behind a highly fragmented mosaic of isolated forest patches.

In the heart of northeastern Brazil lies the Caatinga, a unique and resilient dry forest ecosystem that covers approximately 800,000 sq km (309,000 sq mi), roughly 11% of Brazil's total land area. Found nowhere else on Earth, this semi-arid biome is characterized by its striking adaptation to extreme climatic conditions, extraordinary biodiversity, and deep human history stretching back tens of thousands of years.

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 heart of south-central South America, the Gran Chaco is the continent's second-largest forested biome after the Amazon, a vast semi-arid lowland covering over 1 million sq km (386,000 sq mi) across Argentina, Paraguay, Bolivia, and a small part of Brazil. Bounded to the west by the towering Andes and framed by the Paraguay and Paraná rivers to its east, the Gran Chaco divides broadly into the arid Dry Chaco to the west and the wetter Humid Chaco to the east.

Stretching across the expansive lowlands east of the towering Andes Mountains in northwestern South America, the Llanos, also known as Los Llanos, emerge as a vast tropical grassland plain of remarkable ecological dynamism. Spanning much of Colombia and Venezuela, this ecoregion of seasonally flooded savannas and gallery forests offers a vivid portrait of natural grandeur shaped by the powerful Orinoco River system and dramatic shifts between wet and dry seasons.

Nestled within the cerulean embrace of the Caribbean Sea lies a submarine realm of breathtaking beauty and paramount ecological significance – the Mesoamerican Barrier Reef System (MBRS), often reverently termed the Great Mayan Reef. This extensive and intricate network of coral reefs, seagrass beds, mangrove forests, and associated coastal ecosystems represents the most expansive barrier reef system in the Western Hemisphere.

The Pampas is a vast and remarkably fertile lowland plain in South America that extends from the Atlantic Ocean westward toward the Andes Mountains. This expansive biome encompasses the heartland of Argentina, all of Uruguay, and the southernmost Brazilian state of Rio Grande do Sul. Beyond its sheer size, the Pampas represents a complex interplay of ecological diversity, a rich tapestry woven by the iconic gaucho culture, and a dynamic landscape undergoing modern transformations.

The Pantanal, the world's largest tropical wetland, unfolds as a colossal seasonal floodplain predominantly situated 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 Páramo, or Andean Moorland, is a strikingly distinctive high-mountain biome nestled within the Neotropical realm, specifically gracing the upper reaches of the Andes Mountains in Colombia, Ecuador, Peru, and Venezuela. This remarkable grassland ecosystem, perched above the limits of continuous forest yet below the perpetual embrace of snow and ice, is globally renowned for its singular assemblage of flora and fauna, making it an indispensable cornerstone of the region's irreplaceable biodiversity and a vital contributor to its ecological stability.

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.

The Puna, a beautiful and ecologically significant high-elevation grassland, spans the Central Andes, where life adapts to thin air, strong sun, and cold. This landscape extends from northern Peru through western Bolivia into northern Chile and Argentina. Marked by treeless grasslands, wetlands, and salt flats, the Puna exemplifies nature's resilience at extreme altitudes, supporting exceptional biodiversity and playing a crucial role in the hydrological balance of the Central Andes.

Spanning northwestern Mexico and the southwestern United States lies one of Earth's most biodiverse deserts, the Sonoran Desert. Known in Spanish as the Desierto de Sonora, and encompassing the more specific Desierto de Altar within its western reaches, this extraordinary ecosystem challenges every preconception about desert life. Here, towering saguaro and cardón cacti create forests in the sky, desert bighorn sheep navigate rocky outcrops, and brief winter rains transform barren landscapes into carpets of wildflowers.

Along the Pacific coast of South America, stretching like a lush ribbon from southern Panama to northern Peru, lies one of Earth's most extraordinary and endangered natural treasures: the Tumbes-Chocó-Magdalena Biodiversity Hotspot. This remarkable region is more than just a conservation priority—it serves as a living laboratory of evolution, a refuge for numerous endemic species, and a vital battleground in the global effort to protect biodiversity. The Tumbes-Chocó-Magdalena is one of the most biologically important—and most threatened—regions on our planet.

The Yungas is a remarkable subtropical forest belt along the eastern slope of the Andes Mountains, spanning Peru, Bolivia, and northern Argentina. This unique natural region is a transitional zone, linking the Andean highlands to the lush eastern forests and creating a haven for biodiversity amidst its humid, subtropical climate. The Yungas are characterized by their dense vegetation and diverse ecosystems, which support a wide range of plant and animal species, making it a critical area for conservation.