Wiktionary
bioregion
n. An eco-region.
Wikipedia
Bioregion
A bioregion is an ecologically and geographically defined area that is smaller than an ecozone, but larger than an ecoregion or an ecosystem.
It may be conceptually similar to an ecoprovince.
Usage examples of "bioregion".
It’s well-known for that— the first bioregion robust enough for bears.
For several weeks he worked on a new lichen, designed to extend the borders of the new bioregions, based on a chasmdendolith from the Wright Valleys in Antarctica.
For several weeks he worked on a new lichen, designed to extend the borders of the new bioregions, based on a chasmoendolith from Wright Valley in Antarctica.