Freshwater ecoregions

I mentioned 'ecoregions' in class when we talked about prioritization. I introduced the 825 terrestrial ecoregions and mentioned the Global200 and the Crisis ecoregions. This concept was then expanded to include 229 coast and shelf marine ecoregions.

Finally, this week saw the publication of the Freshwater ecoregions of the world. 426 units, whose boundaries generally - though not always - correspond with those of watersheds.

Freshwater Ecoregions of the World is a collaborative project providing the first global biogeographic regionalization of the Earth's freshwater biodiversity, and synthesizing biodiversity and threat data for the resulting ecoregions.