The criteria for designation as a biodiversity hotspot include species richness, endemism, and risk of extinction.
A biodiversity hotspot is a region having high levels of biodiversity in its communities and ecosystems.
A biodiversity hotspot must have a high number of endemic vascular plants (at least 1500 species).
In conclusion, the criteria for designation as a biodiversity hotspot include species richness, endemism, and risk of extinction.
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