Fig. 1

(a) Aulacomnium turgidum and (b) geographical map showing its sampling site in the Arctic. (c) Polytrichastrum alpinum and (d) geographical map showing its sampling site in the Antarctic.

(a) Aulacomnium turgidum and (b) geographical map showing its sampling site in the Arctic. (c) Polytrichastrum alpinum and (d) geographical map showing its sampling site in the Antarctic.