Biology › Section S · Ecosystems and conservation › Topic S.5
Threats to biodiversity
Species are being lost far faster than the background rate, and the causes are well known: we clear habitats, harvest too hard, move species around the planet, pollute, and change the climate. Understanding how each threat works is the first step towards stopping it.
In this topic
- The main threats
- Habitat loss and fragmentation
- The species-area relationship
- Worked example: clearing a forest
- Overharvesting
- Invasive species
- Introduced diseases
- Pollution
- Climate change
- Worked example: squeezed off a mountain
- Common mistakes to avoid
- Key takeaways
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