Measurements of dithionite-extractable Fe (not preceded by an ascorbate extraction) for glacial sediment from Antarctica and elsewhere [22, 23] have a mean of 0.47 ± 0.37% which is not significantly different from the sum of FeA and FeD in Table 1.
These two optima are significantly different (Whitney rank sum test, p<0.001; N = 20).
The frequency distribution of the neighbours (a measure of the local cell density) for SP and MP cells is significantly different (Wilcoxon-Rank-Sum test, p<0.001).
The within-population epigenetic Shannon indices calculated for RS and SM were 0.084 and 0.024, respectively, and were significantly different (Wilcoxon rank sum test; W = 11459.5, P<0.001; Table 3).
After hint presentation, which should help to restructure the problem representation successfully, the relative frequencies of the four different restructuring levels were again significantly different (Friedman rank sum test, p<0.0002; Fig. 1B).
This is consistent with the optima seen in behaviour in the no-choice directionality test (4.5 kHz) and in the two-choice paradigm at 5.0 kHz, which are also significantly different (Whitney rank sum test, p = 0.001; N = 20).
Furthermore, the observed effects were well accounted for by an additive model of semantic and harmonic processing (i.e., results in the double violation condition were not significantly different from the sum of the simple semantic and melodic violations).
For correct solutions without hint the relative frequencies of the four levels of rating of suddenness were significantly different (Friedman rank sum test, p<0.0001): the higher the rating of suddenness, the more incidences we observed (Fig. 1A).
Within-population Shannon diversity indices for genetic data were 0.013 and 0.008 for RS and SM, respectively, and not significantly different (Wilcoxon rank sum test; W = 16031.5, P = 0.06; Table 3).
When evaluating the rank order of clonotype abundance determined by each method, the approaches were not found significantly different (Wilcoxon rank-sum test, p > 0.05).
