September 2018 cover
Comprehensive analysis of field studies from the terrestrial Arctic reveals large spatial biases in sampling. Nearly one-third of all citations are derived from sites located within 50 km of two research stations — Toolik Lake in the USA and Abisko in Sweden, pictured. Image: courtesy of Maja Sundqvist, Umeå University. Photographer: Tyler Logan. Cover Design: Bethany Vukomanovic.