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. 2010 Sep 1;5(9):e12467. doi: 10.1371/journal.pone.0012467

Table 2. Taxonomic classification of species reported in the Baltic Sea area, incl. Kattegat.

Taxonomic group Estimated no. of species1 State of knowledge2 No. of alien species3 No. ID guides4
Domain Archaea ? 1 ? -
Domain Bacteria (including Cyanobacteria) ? (200) 5 1 (5) ? (0) - (4)
Domain Eukarya
Kingdom Chromista 963 4 7 4,9
Phaeophyta 130 4 3 4, 9
Kingdom Plantae
Chlorophyta 505 4 2 4, 18, 20
Rhodophyta 150 4 4 18
Angiospermae 20 4 1 16
Kingdom Protoctista (Protozoa) 963 3 2
Dinomastigota (Dinoflagellata) 88 4 2 77
Foraminifera 96 2 0
Kingdom Animalia
Porifera 25 4 0 77
Cnidaria 99 4 5 31, 40, 67, 77
Platyhelminthes 313 3 2 58, 77, 82–87, 90
Mollusca 318 5 12 75, 77, 76, 81
Annelida 388 4 12 50, 52, 76
Crustacea 607 4 33 57, 61, 73, 51, 53–54, 22–27, 36, 37, 41, 42, 45, 46, 77, 79, 80, 82–87
Bryozoa 68 4 1 77
Echinodermata 52 5 0 77
Urochordata (Tunicata) 26 4 1 38–40, 44, 46–48, 77
Other invertebrates 765 3 3 62–63, 72, 56, 59–60, 66, 70, 64, 69, 65, 49, 71, 47, 48, 77, 82–87, 90–91
Vertebrata (Pisces) 200 5 29 92, 93, 97, 98, 100
Other vertebrates 89 4 3 101–106
SUBTOTAL
TOTAL REGIONAL DIVERSITY 3 6,065 117
1

Estimated number of species in data sources from Table 1 and [194].

2

State of knowledge: 5 = very well-known; 4 = well-known; 3 = poorly known; 2 = very poorly known; 1 = unknown.

3

Number of alien species from [32].

4

Identification guides cited in Text S1.

5

Numbers in brackets indicate information for cyanobacteria.