[SolidRedState]

Good thing I read the entire article before commenting. I read the excerpt and was thinking that I had never heard of salmon living in trees.

I read the whole thing and still can't understand how salmon live in dead trees. 

[ButThreeLeftsDo]

It's an indirect effect.

"At issue were regulations requiring the Forest Service to leave behind dead trees along streams and intermittent channels to prevent erosion that chokes salmon spawning beds and to provide large woody debris that creates resting places for fish in the water."