The world's most diverse life is squeezed into just 2% of land

Countries & Cities · Published 15 October 2026 Swipe more like this →

In short: Conservationists face a daunting reality: they cannot save every species on Earth due to limited funding. To fight back, scientists use a 'silver bullet' strategy by identifying biodiversity hotspots—tiny geographic areas that pack an extraordinary concentration of unique life under immediate threat from habitat loss.

The concept of a biodiversity hotspot was pioneered by Norman Myers in the late 1980s. It serves as a prioritization tool for conservationists who must decide where to spend limited resources to achieve the maximum impact. To qualify as a hotspot under the primary criteria established in 2000, a region must meet two strict thresholds: it must host at least 1,500 species of vascular plants as endemics (representing more than 0.5% of the world's total) and have lost at least 70% of its original primary vegetation. Myers first introduced this concept in two articles published in The Environmentalist during 1988 and 1990. These initial ideas were later refined into a comprehensive analysis of the world's most endangered terrestrial ecoregions. This framework helps address the 'agony of choice' faced by systematic reserve selection.

The scale of this concentration is staggering. Despite occupying a mere 2.4% of terrestrial area, 36 designated hotspots house almost 60% of global bird, mammal, reptile, amphibian, and plant types. In some cases, a single hotspot can host up to 15,000 endemic plant species while having lost as much as 95% of its natural habitat. This makes these regions critical 'lifeboats' for global biodiversity. Caribbean islands like Haiti and Jamaica are currently experiencing severe pressure on their unique plants and vertebrates due to rapid deforestation. These regions represent some of the most vulnerable examples of habitat destruction. The loss is so significant that these sites have lost around 85% of their area.

Despite their importance, many hotspots remain under-protected. The strategy focuses on the fact that as many as 44% of all vascular plant species and 35% of four major vertebrate groups are confined to just 25 of these hotspots. By focusing on these specific areas, planners aim to protect the highest proportion of at-risk species at the lowest relative cost. Notable regions facing extreme pressure include the Tropical Andes, Philippines, Mesoamerica, and Sundaland. The Critical Ecosystem Partnership Fund provides technical assistance and money to various nongovernmental organizations to protect these rich areas. Additionally, all biodiversity hotspots are required to contain at least one Global 200 Ecoregion. This ensures that conservation efforts align with broader global goals for taxonomic uniqueness and ecological rarity.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• Protecting half of Earth's land requires a focus on specific ecoregions
• More than 80 percent of the world's species live in forests
• Why the world is losing its wild spaces at an alarming, unsustainable rate
• Tropical forests cover under a fifth of land but hold half of all species
• Most of the world's critically endangered species are plants, not animals
• Birobidzhan was the Soviet Union's attempt to create a Jewish homeland in the Far East.
• How a carpenter's workshop became a global playground
• Is birthright citizenship a constitutional guarantee or a matter of evolving federal policy?
• The man who traded private equity for public housing power
• The American bison is not a buffalo, but it is a survivor of near-extinction.
• Is Bill Johnson the architect of a global movement or just a local pastor?
• Bitcoin is the world's first decentralized digital cash system, operating without any central authority.

More in Countries and other regions · More in Countries & Cities · Latest · A–Z · All topics