Table 10. Biotic diversity in the high Arctic (not exclusively the U.S.).
| Taxonomic group | No. species1,2 |
| Domain Archaea | UD |
| Domain Bacteria (including Cyanobacteria) | UD |
| Domain Eukarya | 5,925 |
| Kingdom Chromista | 287 |
| Phaeophyta3 | |
| Kingdom Plantae 3 | 150 |
| Chlorophyta | |
| Rhodophyta | |
| Angiospermae | |
| Kingdom Protoctista (Protozoa) | 759 |
| Dinomastigota (Dinoflagellata) | 70 |
| Foraminifera | 325 |
| Kingdom Animalia | 4,729 |
| Porifera | 163 |
| Cnidaria | 227 |
| Platyhelminthes | 134 |
| Mollusca | 488 |
| Annelida | 533 |
| Crustacea | 1525 |
| Bryozoa | 331 |
| Echinodermata | 151 |
| Urochordata (Tunicata) | 64 |
| Other invertebrates | 600 |
| Vertebrata (Pisces) | 415 |
| Other vertebrates | 98 |
| TOTAL REGIONAL DIVERSITY 4 | 5,925 |
(Bluhm, Gradinger and Hopcroft, personal communication).
Notes:
1
Sources of the reports: databases, scientific literature, books, field guides, technical reports, and personal communication with taxonomic experts.
2
Identification guides cited in Text S2.
3
The 150 species of seaweeds listed by Bluhm, Gradinger and Hopcroft for the entire Arctic include Phaeophyta. For more detail regarding seaweeds in the Arctic Ocean, see Table S1.
4
Total regional diversity for the Arctic Ocean, including all taxonomic groups, is reported in Table S1.
UD = Listed in work but number undetermined to date.