Table 2.

Shared OTUs.

	16S	18S	g23
Overall	14.0±4	10.2±2.4	5.8±11.6
Intra-Antarctic	19.4±4***	13.7±2.2***	5.7±2.2*
Intra-Arctic	10.1±1.1	11.7±2.8*	10.9±9.3*

Numbers represent averaged values (%) of geometric means of the pairwise comparisons.

^*p < 0.05;

^***p < 0.0005.

Paired t-tests. Comparison with respect to the overall shared OTUs.