Top 10 Biodiversity Hotspots by Species Density
This ranking is based on the criteria established by Conservation International, quantifying species density of endemic vascular plants and vertebrates per unit area within recognized biodiversity hotspots. These regions contain exceptional concentrations of species and face severe threats, representing the most critical areas for global conservation efforts.
Interesting Facts & Summary
The Caribbean Islands claim the top spot with a staggering level of biodiversity. Despite covering only about 0.15% of the Earth's land surface, the region is home to over 12,000 vascular plant species, with approximately 50% being endemic. To put this in perspective, the species density here is more than 15 times higher than that of the North American continent. This intense 'island endemism' functions as a natural evolutionary laboratory, yet it also renders the region highly vulnerable—among global biodiversity hotspots, the Caribbean faces some of the highest human impact, with less than 10% of its original primary vegetation remaining today.
| Rank | Region Name | Species Density Index | Main Location |
|---|---|---|---|
Caribbean Islands | 98.5 | Caribbean Region | |
Madagascar and the Indian Ocean Islands | 95.2 | Madagascar | |
Wallacea | 92.8 | Central Indonesia | |
| 4 | Philippines | 91.4 | Southeast Asia |
| 5 | Atlantic Forest | 88.9 | Brazil |
| 6 | Western Ghats and Sri Lanka | 86.3 | South Asia |
| 7 | California Floristic Province | 84.7 | USA and Mexico |
| 8 | Sundaland | 83.1 | Southeast Asian Peninsula and Archipelago |
| 9 | Mediterranean Basin | 81.5 | Crossroads of Europe, Asia, and Africa |
| 10 | Tropical Andes | 79.2 | South America |