A unique region on the Earth that has distinct soils, landforms, watersheds, climates, native plants, and animals, and/or other particular natural characteristics.

area with specific ecological characteristics, including living and nonliving things. A bioregion is larger than an ecosystem.

a naturally bounded, ecologically distinct geography: a watershed is one example. Term coined by Peter Berg and Raymond Dasmann. The largest bioregion is an ecoregion (example: the Ozark Plateau), the next largest a georegion (river basins, mountains, watersheds), and the next a local morphoregion. As Berg described it:

A territory defined by a combination of biological, social, and geographic criteria, rather than geopolitical considerations; generally, a system of related, interconnected ecosystems. (Source: Global Biodiversity Assessment, GBA)

a land area that is defined by shared plant and animal species, water, climate, soils, and human culture

A natural region defined by its ecological coherence. Each bioregion has a distinct geological formations, climatic conditions and ecology.

A territory defined by a combination of biological, social and geographic criteria, rather than by geopolitical considerations.

a unique life-place with its own soils, landforms, watersheds, climates, native plants and animals, and many other distinct natural characteristics.

  A natural region defined by its ecological coherence. Each bioregion has a distinct geological formations, climatic conditions and ecology.

  biogeographic areas that capture the patterns of ecological characteristics in the landscape or seascape and form part of the Interim Biogeographic Regionalisation for Australia. more about biore [..]

refers to a biogeographic region or an area of land that is dominated by similar broad landscape patterns that reflect major structural geologies and climate, as well as major floristic and faunal ass [..]