Global Change Biology EPIC3Global Change Biology, WILEY-BLACKWELL PUBLISHING, ISSN: 1354-1013 Wolf, K, Romanelli, E, Rost, B, John, U, Collins, S, Weigand, H & Hoppe, C 2019, ' Company matters : The presence of other genotypes alters traits and intraspecific selection in an Arctic diatom under climate change ', Global Change Biology . https://doi.org/10.1111/gcb.14675