noun
- the geographical separation of a population of organisms into isolated groups by a physical barrier, leading to the evolution of new species
Usage: biology; biogeography
Examples
- The formation of the Isthmus of Panama caused vicariance in marine species on either side.
- Mountain ranges often create vicariance by separating populations of forest animals.
- Scientists study vicariance to understand how new species develop in isolation.
- The rise of the Andes Mountains led to vicariance in many South American bird populations.
- Vicariance explains why similar species are found on different continents.
- Continental drift has caused vicariance events throughout Earth’s history.