Figure 1.

Pairs of clones used in this study. Clones were taken from two transects taken near Mountain Lake Biological Station, VA [19]. Transect T1 was taken on 25 September 2000 and Transect T2 was taken on 15 October 2000 by A. Fortunato. Transect T2 was reported in a previous study of natural population structure [19]. (a) Millimetre-scale mixes were from the same soda-straw soil sample, which were separated by no more than approximately 20 mm [19]. (b) Metre-scale mixes were clones found metres apart. Numbers below sample names give the distance between clones (m). In part (b), the top clone is the clone to the left of the transect.