from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The capacity or tendency of an organism or a species to move about or disperse in a given environment.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The degree to which an organism or taxon can or does move or spread within an environment.
Sorry, no etymologies found.
One suggests that fire-induced population turnover and fragmentation, in combination with edaphic specialization and low vagility, is the driving force behind speciation.
It seems like it would be substantial, but it probably is only great for 1) creatures that live very close to high-traffic, high-speed areas it isn't hard to avoid squirrels, etc., on suburban streets when you're only driving 25 mph, though snails are a different story) and/or 2) creatures that have high vagility.