Causes of Extinction. Non-human causes of extinction:. Volcanic events Ocean temperature change Sea level changes Meteorites Glaciations Global climate change Competition/predation. Human causes of extinction/loss of biodiversity - HIPPO. H abitat destruction and fragmentation
= number of species becoming extinct per unit time.
The World Conservation Union (IUCN) Red List Criteria are used to determine extinction risk and set numerical thresholds for qualification for three globally threatened categories.
“to influence, encourage and assist societies throughout the world to conserve the integrity and diversity of nature and to ensure that any use of natural resources is equitable and ecologically sustainable.”