posted 6 years ago
Interesting article. I always thought the main driver for the PNW’s lack of diversity was the recent glaciation. But now that I think of it, wouldn’t Chicago of had glaciers around the same time period? Chicago and the rest of the Midwest have a huge diversity of trees and plants. I use to study insects and the same is true there: minimal diversity in the PNW and tons in the Midwest and east coast at similar latitudes.
The Cascades could be a good barrier for recolonization to the west of the pacific crest trail but east of there, I’m not sure what the story is.
six of one... baker’s dozen of the other