TABLE 2.
Average percent difference in relative abundance between endospore-enriched samples and nonenriched controls across the three age categories
| Taxon | Family | Differencea
(%) |
|||||
|---|---|---|---|---|---|---|---|
| 19,000 yr | U value | 27,000 yr | U value | 33,000 yr | U value | ||
| Actinobacteria | Micrococcaceae | 2.4 ± 0.5b | 0 | 0.0 ± 0.0 | 9.5 | 0.0 ± 0.0 | 11 |
| Solirubrobacteraceae | 1.5 ± 0.4 | 3 | 0.6 ± 0.3 | 4 | 0.1 ± 0.1 | 5 | |
| Gaiellaceae | 1.0 ± 0.3c | 1 | −0.2 ± 0.1 | 8 | 0.1 ± 0.1 | 8.5 | |
| Bacilli | Planococcaceae | 2.4 ± 0.9 | 4 | −8.5 ± 1.0c | 1 | 4.0 ± 2.6 | 8 |
| Thermoactinomycetaceae | 0.4 ± 0.1c | 0 | 20 ± 2.5c | 2 | 7.8 ± 2.2 | 6 | |
| Bacillaceae | 0.7 ± 0.1c | 0 | −2.5 ± 1.2 | 8 | 1.0 ± 0.4 | 9 | |
| Paenibacillaceae | 2.5 ± 0.4c | 0 | 0.4 ± 1.6 | 12 | 5.6 ± 2.7 | 4 | |
| Clostridia | Clostridiaceae | 3.1 ± 0.4b | 0 | −2.5 ± 1.5 | 5 | −9.2 ± 1.2b | 0 |
a
A negative value shows underrepresentation in the endospore-enriched samples compared to the nonenriched controls, while a positive value shows overrepresentation. The values are averages of five replicate cores. The U value is a test statistic generated by a Mann-Whitney-Wilcoxon test that represents the level of difference between two groups. Lower U values indicate that two groups are more different.
b
P < 0.01 (Mann-Whitney-Wilcoxon test).
c
P < 0.05 (Mann-Whitney-Wilcoxon test).