Table 3 Phylogenetic relationship between reamplified and sequenced DGGE bands isolated from different fractions of a toxic A. tamarense bloom off the Orkney Isles, sampled in 1999

F1^a

Ophiolis aculeata symbiont (U63548); 96%

Ruegeria atlantica (D8526); 92%

α Proteobacteria, Roseobacter group

F2^a

O. aculeata symbiont (U63548); 98%

R. gelatinovorans (D8523); 94%

α Proteobacteria, Roseobacter group

F3^a

O. aculeata symbiont (U63548); 96%

R. atlantica (D8526); 92%

α Proteobacteria, Roseobacter group

F4^a

O. aculeata symbiont (U63548); 98%

R. gelatinovorans (D8523); 94%

α Proteobacteria, Roseobacter group

F5^a

Uncultured α Proteobacterium (AF466884); 88%

Ahrensia kieliense (D88524); 81%

Proteobacteria

F8^a

Uncultured α Proteobacterium Shippagan (AF100168); 91%

Staleya guttiformis (Y16427); 90%

α Proteobacteria, Roseobacter group

F9^a

Uncultured Cytophagales (AY033305); 94%

Gelidibacter algens (AF001367); 90%

Bacteroidetes; Flavobacteria

F10^a

Uncultured Cytophagales (AY033305); 94%

G. algens (AF001367); 90%

Bacteroidetes; Flavobacteria

A4^b

Uncultured Roseobacter NAC-11-3 (AF245632); 93%

R. gelatinovorans (D8523); 93%

α Proteobacteria, Roseobacter group

A5^b

Uncultured marine bacterium D015 (AF177555); 97%

R. algicola (X78315); 97%

α Proteobacteria, Roseobacter group

A6^b

Uncultured marine bacterium D015 (AF177555); 98%

R. algicola (X78315); 97%

α Proteobacteria, Roseobacter group

A7^b

Uncultured marine bacterium D015 (AF177555); 98%

R. algicola (X78315); 97%

α Proteobacteria, Roseobacter group

A8^b

Uncultured α Proteobacterium Shippagan (AF100168); 99%

Staleya guttiformis (Y16427); 97%

α Proteobacteria, Roseobacter group

A10^b

Uncultured α Proteobacterium Shippagan (AF100168); 99%

Staleya guttiformis (Y16427); 97%

α Proteobacteria, Roseobacter group

A11^b

Crassostrea virginica symbiont CV1010-362 (AF114485); 96%

R. gelatinovorans (D8523); 95%

α Proteobacteria, Roseobacter group

A14^b

Skeletonema pseudocostatum 16S rRNA (X82155); 98%

Diatoms

D1^c

Skeletonema pseudocostatum 16S rRNA (X82155); 98%

Diatoms

D2^c

Skeletonema pseudocostatum 16S rRNA (X82155); 96%

Diatoms

D3^c

Unidentified picoplankton clone OM20 (U32670); 98%

Skeletonema pseudocostatum 16S rRNA (X82155); 96%

Eukaryota, unclassified plastid

D4^c

Uncultured vent bacterium ML-2d (AF208994); 96%

Skeletonema pseudocostatum 16S rRNA (X82155); 96%

Eukaryota, unclassified plastid

D5^c

Environ. clone OCS20 chloroplast gene (AF001654); 99%

Guillardia theta plastid (AF041468); 96%

Eukaryota, unclassified plastid

D8^c

Skeletonema pseudocostatum 16S rRNA (X82155); 97%

Diatoms