fossil. Introduction of non-native species is not a natural cause of extinction. Volcanic activity and mass extinction. Natural causes of extinction Extinction occurs when species are diminished because of environmental forces such as habitat fragmentation, climate change, natural disaster, overexploitation by humans, and pollution, or because of evolutionary changes in their members (genetic inbreeding, poor reproduction, decline in population numbers). About a dozen get extinct per day. Changes in weather patterns 3. The main causes of extinction can be either natural causes or human activities that affect those animals directly or indirectly. What causes black spots on deer? The biodiverse Earth can't keep up with the rapid changes in temperature and climate. 7 events that could cause mass extinction on Earth process of complete disappearance of a species from Earth. Destruction of Habitat – It is currently the biggest cause of current extinctions. Natural climate change, over millions of years, is another cause of extinction. Species extinction can cause an increase in the population of prey, which means in an ecosystem, the number of animals that were prey to another species increases drastically causing an imbalance in the ecosystem and vice versa. … Overexploitation 7. Create scenario cards for each of the below causes of extinction. What's likely to cause human extinction – and how can we avoid it?
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