Biodiversity

Brazil is the most biodiverse country on Earth, home to an estimated 15–20% of the world's biodiversity. Brazil is home to at least 43,020 plant species and an astonishing 103,870 animal species. The Amazon is renowned for jaguars, anacondas, ancient trees, and vast insect diversity. The Pantanal is a sanctuary for caimans, capybaras, and large populations of waterfowl.

The nation is in a race between cataloging this biodiversity (as biologists continue to find new species) and losing it to habitat destruction. The Atlantic Forest (Mata Atlântica) has the most endangered species, including over 2,800 animal species and 3,200 tree species.^1–5

Brazil is internationally classified as a megadiverse country, a designation reserved for nations that together host the majority of the planet’s species. Brazil alone accounts for an estimated 15–20% of known global biodiversity, a result of its continental scale, climatic range, and long-term ecological stability across multiple biomes.¹ This diversity is not evenly distributed but concentrated across forests, wetlands, savannas, and coastal systems that evolved under distinct environmental pressures.

The Amazon rainforest remains the largest reservoir of this diversity, particularly for plants, insects, fungi, and microorganisms. Many taxa remain poorly studied, and new species are formally described each year.² This creates a paradox: Brazil is both one of the most biologically documented countries in the Global South and one of the most affected by data deficiency, where species disappear before they are scientifically described or ecologically understood.

The Atlantic Forest illustrates biodiversity under pressure. Despite being reduced to a fraction of its original extent, it remains one of the world’s most important biodiversity hotspots due to exceptionally high endemism.³ Government assessments list nearly 2,000 species in this biome as threatened with extinction, reflecting centuries of urbanization, agriculture, and infrastructure development concentrated along Brazil’s coast.⁴

The Pantanal and Cerrado contribute differently but no less critically. The Pantanal supports dense populations of large vertebrates and migratory birds through seasonal flooding cycles, while the Cerrado hosts pollinators and plant species essential to Brazil’s agricultural productivity.⁵ Disruption in these systems affects not only conservation outcomes but food security, water availability, and climate resilience.

Beyond conservation, biodiversity underpins Brazil’s strategic economic future. Genetic resources, ecosystem services, and biological processes form the foundation of the bioeconomy, from pharmaceuticals and biomaterials to pollination and soil regeneration. Estimates of ecosystem service value reach into the trillions of dollars globally, with Brazil holding one of the largest national shares.¹ Yet realizing this value depends on closing the “taxonomic gap,” strengthening monitoring, and enforcing protection.

Institutions such as ICMBio and the National Center for Flora Conservation (CNCFlora) coordinate national threat assessments and priority mapping.⁴ The challenge Brazil faces is not lack of biological wealth, but whether it can document, protect, and integrate that wealth into development pathways before irreversible loss occurs.