Environmental palaeogenomic reconstruction of an Ice Age algal population

摘要

a, b Location of Lake Øvre Æråsvatnet (circled in red, panel b) in the ice-free refugium of Andøya in northwest Norway. The regional ice extent for Scandinavia in panel a has been plotted for 22 (outer) and 17 (inner) cal kyr BP and is based on Hughes et al.73. The local ice extent in panel b is plotted for 22–18 and 18–17.5 cal kyr BP and is based on Vorren et al.31. Panel a is made with map data from Natural Earth, while panel b is made with data from Kartverket.no. c Taxonomic composition of the LGM Andøya sediment samples, based on alignment to a reference panel of 42 eukaryotic or bacterial nuclear genomes of genera that are either expected in the region or which are exotic controls. The scale is the number of sequences mapped to each Megabase (Mb) of the reference genome. For readability, the algal, bacterial, and human results are plotted separately with differing x-axis scales.