[ vahy-kair-ee-uh ns, vi- ]
/ vaɪˈkɛər i əns, vɪ- /
the geographical separation and isolation of a subpopulation, resulting in the original population's differentiation as a new variety or species.
Also called vicariance biogeography.
Related formsvi·car·i·ant, adjective, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Science definitions for vicariance
[ vī-kâr′ē-əns, vĭ- ]
The separation or division of a group of organisms by a geographic barrier, such as a mountain or a body of water, resulting in differentiation of the original group into new varieties or species. See also speciation.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.