Table 2.
OTU richness based on trawl data, total S (trawl + ROV) data and diversity and evenness indexes obtained from relative OTU abundances of only trawl data.
| Site | Subsystem | OTUs richness (S) | Total S (trawl + ROV) | Diversity (H´) | Evenness (J´) |
|---|---|---|---|---|---|
| ST17 | OI | 4 | 15 | 1.3 | 1.0 |
| ST18 | OI | – | 10*** | – | – |
| ST20 | OI | 27 | 35 | 2.5 | 0.8 |
| ST21 | OI | 13 | 15 | 1.3 | 0.5 |
| ST22 | OI | 6 | 11 | 1.6 | 0.9 |
| Mean | OI | 12 | 17 | 1.7 | 0.8 |
| SF2 | SM | – | 14*** | – | – |
| SF5 | SM | 32 | – | 2.2 | 0.6 |
| SF6 | SM | 19 | 27 | 2.2 | 0.7 |
| SF7 | SM | 19 | 35 | 2.5 | 0.9 |
| SF8 | SM | 6 | 8 | 1.6 | 0.9 |
| SF9 | SM | 45 | 50 | 1.9 | 0.5 |
| SFX | SM | 11 | 13 | 1.3 | 0.6 |
| mean | SM | 22 | 24 | 1.9 | 0.7 |
Subsystem OI = oceanic islands and SM = seamounts. Only ROV (***).