Why are biodiversity hotspots prioritized for conservation actions?

• A. They host a disproportionate share of endemic species under threat, delivering high conservation gains per area protected.
• B. They are the only places with threatened species.
• C. They require no management and are easy to protect.
• D. They have the highest overall species richness regardless of endemism.

Answer: (C)

The idea being tested is using limited conservation resources where they will do the most good. Biodiversity hotspots are prioritized because they combine two powerful factors: a high level of endemism (many species found nowhere else) and a high level of threat to their habitats. Protecting these areas tends to safeguard a large portion of irreplaceable biodiversity within a relatively small area, so the conservation gains per unit area protected are very high.

This approach isn’t saying there aren’t threatened species elsewhere, or that hotspots don’t require active management. It’s about efficiency: focusing on places where loss would erase a unique set of species that can’t be recovered elsewhere. It’s also not solely about overall species richness; some areas may be rich in species but not in endemics or under immediate threat, which makes them a lower priority under this specific strategy.