Table 2.
Alpha diversity indices of the bacterial community in the incubation experiment.
| nOTUs |
invS |
||||
|---|---|---|---|---|---|
| Treatment | Value | Tukey HSD | Value | Tukey HSD | |
| rDNA | |||||
| day0 | 5,777 ± 56 | a | 359 ± 28 | a | |
| unfed | 5,113 ± 54 | a | 193 ± 22 | b | |
| CHI | 3,479 ± 359 | b | 56 ± 8 | c | |
| TWEI | 1,323 ± 95 | c | 26 ± 0 | d | |
| EHUX | 1,786 ± 44 | d | 25 ± 10 | d | |
| BCLA | 1,686 ± 286 | d | 35 ± 1 | e | |
| MARC | 1,922 ± 131 | d | 38 ± 2 | e | |
| rRNA | |||||
| day0 | 7,816 | NA | 1,230 | NA | |
| unfed | 2,767 | NA | 45 | NA | |
| CHI | 4,602 | NA | 67 | NA | |
| TWEI | 2,362 | NA | 32 | NA | |
| EHUX | 2,358 | NA | 34 | NA | |
| BCLA | 2,498 | NA | 34 | NA | |
| MARC | NA | NA | NA | NA | |
Richness and evenness were estimated based on OTU number (nOTU) and the inverse Simpson index (invS) of rDNA (n = 3) and rRNA (n = 1) datasets, and are given as mean ± standard deviation where applicable. Differences between treatments were assessed with ANOVA at a significance threshold of 0.05. Letters indicate significantly different groups based on pairwise Tukey HSD post hoc test. Day 0: starting conditions, unfed: control sediments after 23 days of incubation, carbon amendments: chitin (CHI), Thalassiosira weissflogii (TWEI), Emiliania huxleyi (EHUX), Bacillaria sp. (BCLA), Melosira arctica (MARC).