title: Ecology. Western U.S. forests suffer death by degrees.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Pennisi
mesh_terms: D002980:Climate; D017753:Ecosystem; D017752:Greenhouse Effect; D064028:Tracheophyta / Q000254:growth & development; D014197:Trees / Q000254:growth & development; D014481:United States