Institution: | 1. US Forest Service, Northern Research Station, Grand Rapids, MN 55744, USA;2. Department of Natural Sciences, Mid Sweden University, 851 70 Sundsvall, Sweden;3. E‐mail bengt‐gunnar.jonsson@miun.se;4. E‐mail mari.jonsson@miun.se;5. Department of Ecology and Environmental Science, Ume? University, 901 87 Ume?, Sweden;6. E‐mail per‐anders.esseen@emg.umu.se |