At least 1500 indigenous species of vascular plants are found in the region, which has lost at least 70% of its original or main vegetation. In other terms, a hotspot is unique.
30% or less of the original vegetation must still be present. It must therefore be in danger. Hotspots are some of the world's richest and most significant ecosystems, and many of their fragile residents are totally reliant on nature to survive. According to one estimate, hotspot forests, wetlands, and other ecosystems, which make about 2.5% of Earth's land surface, provide 35% of the "ecosystem services" that rely on vulnerable human populations.
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