Species extinction is a critical issue affecting global biodiversity, with various forms such as local, global, and functional extinction. Human activities, including habitat destruction and overexploitation, have accelerated extinction rates, potentially causing a sixth mass extinction. The IUCN Red List plays a crucial role in monitoring and conserving at-risk species, highlighting the urgency of conservation efforts to protect Earth's biodiversity.
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Local extinction occurs when a species disappears from a specific region but still exists elsewhere
Global extinction is the complete disappearance of a species from Earth
Functional extinction happens when a species' population is too low to fulfill its ecological role
Co-extinction is when the loss of one species leads to the extinction of another due to their interdependent relationship
Adaptive Radiation
Adaptive radiation is the diversification of surviving species after a mass extinction event
Mass extinction is a catastrophic event that results in a significant loss of biodiversity
Extinction can be caused by natural disasters, such as asteroid impacts or volcanic activity, as well as genetic factors like inbreeding and genetic drift
Habitat Destruction
Habitat destruction, often caused by human activities, is a major driver of extinction
Overexploitation
Overexploitation of species, such as hunting and fishing, can lead to their extinction
Pollution
Pollution, caused by human activities, can harm and even cause the extinction of species
Invasive Species
The introduction of non-native species by humans can lead to the extinction of native species
Dodo
The dodo, endemic to Mauritius, was driven to extinction by human activities such as overhunting and the introduction of non-native species
Passenger Pigeon
The passenger pigeon, once abundant in North America, went extinct due to human activities like hunting and habitat destruction
Definition and Purpose
The IUCN Red List is a comprehensive inventory that assesses the conservation status of species and aids in identifying threats and necessary conservation actions
Critically Endangered Species
The IUCN Red List includes information on critically endangered species, such as the Sunda pangolin, which is at high risk of extinction
Extinction Records
The IUCN Red List records the extinction of over 380 vertebrate species since 1500 AD, many of which were caused by human activities
00
When a species no longer exists on ______, it is said to have undergone ______.
Earth
extinction
01
The ______ grizzly bear is an example of a species that is ______ in one area but still exists in others.
California
locally extinct
02
Definition of Extinction
The complete disappearance of a species from Earth.
