1 Yale School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511; Department of Terrestrial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), 6700AM, Wageningen, The Netherlands; thomas.crowther@yale.edu.
2 Yale School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511;
3 Department of Environmental Sciences, University of Helsinki, FI-00014 Helsinki, Finland;
4 Laboratory of Environmental Microbiology, Institute of Microbiology of the Academy of Sciences of the Czech Republic, v.v.i., 14220 Prague 4, Czech Republic;
5 Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH 03824.