Supplement to: Smith, Helen Elizabeth Katie; Poulton, Alex J; Garley, Rebecca; Hopkins, Jason; Lubelczyk, Laura C; Drapeau, Dave T; Rauschenberg, Sara; Twining, Ben S; Bates, Nicolas R; Balch, William M (2017): The Influence of Environmental Variability on the Biogeography of Coccolithophores and Diatoms in the Great Calcite Belt. Biogeosciences Discussions, 35 pp, https://doi.org/10.5194/bg-2017-110