Fig. 4: Biometric comparison of Ancylonema spp. cells showing variation within and between Robert Island morphotypes and existing studies.
From: Surface darkening by abundant and diverse algae on an Antarctic ice cap
a Average cell length comparisons between large Ancylonema morphotypes observed from Robert Island and in the wider literature. b Cell length versus width distributions across all measured Robert Island Ancylonema morphotypes. A randomised jitter (offset) of ≤0.2 µm has been applied to each point along the cell width axis to aid visualisation. c Average cell width comparisons between smaller A. alaskanum type cells from Robert Island (including variant RI-C) and in the wider literature. Colours represent the different Robert Island morphotypes. Solid lines in (a) and (c) represent measurement mean (RI-N N = 121, RI-T = 54, RI-E = 55, RI-C = 45, RI-A = 219) and standard deviations, and shaded areas represent cell measurement ranges, where available. Average and SD measurements from the following locations and studies: Svalbard34, Greenland69, Alaska50, Switzerland22, Austria22, Chile29, Windmill Is. (S) (small cells)27, Windmill Is. (B) (big cells)27.
