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Ref. No. [UMCES] CBL 11-037
9
4.5. Phytoplankton: 10 – 50 µm and 5 – 10 µm
The following two tables describe phytoplankton species composition during various
trials in two different size classes.
Hydac 1, 2, and 3
Dominant Species
Type
General Size
Skeletonema costata
Diatom (chain forming)
Individual cells 9-10 µm but forms
long chains, 100+µm long
Heterocapsa rotundatum
Dinoflagellate
5 – 6 µm
Other Noted Species (small #)
Prorocentrum minimum
Dinoflagellate
22 x 15 µm
Heterocapsa triquerta
Dinoflagellate
24 x 16 µm
Ceratulina pelagica
Diatom (chain forming)
100 x 24 µm (can form larger chains)
Gyrodinium estruariale
Dinoflagellate
15 x 11 µm
Hydac 4, 5 and 6
Dominant Species
Type
General Size
Thalassiosira sp.
Diatom (chain forming)
Individual cells 8 – 12 µm
Chaetoceros sp.
Diatom (chain forming)
Individual cells 7 -15 µm
Other Noted Species (small #)
Amphidinium sp.
Dinoflagellate
50 x 13 µm
Amphora sp.
Diatom
8 x 30 µm
Asterionella sp.
Diatom (forms star
shaped clusters)
40 x 11 µm
Ceratulina pelagica
Diatom (chain forming)
100 x 24 µm (can form larger chains)
Cosinodiscus sp.
Diatom (centric)
Approx. 110 µm diameter
Gonyaulux sp.
Dinoflagellate
24 x 40 µm
Gyrodinium estruariale
Dinoflagellate
15 x 11 µm
Gymnodinium galiesianum
Dinoflagellate
15 x 18 µm
Heterocapsa rotundatum
Dinoflagellate
Approx. 5 – 6 µm
Heterocapsa triquerta
Dinoflagellate
24 x 16 µm
Rhizosolenia pungens
Diatom
Varies 4 – 12 µm diameter 100+ µm in
length
Navicula sp.
Diatom
8 x 30 µm
Scrippsiella sp.
Dinoflagellate
23 x 36 µm
Skeletonema costata
Diatom (chain forming)
Individual cells 9 – 10 µm but forms
long chains 100+ µm in length
Synedra sp.
Diatom
Varies 2 – 7 µm diameter 150 – 200
µm in length
Thalassionema sp.
Diatom
Varies 64 µm
Chlamydomonas sp.
Chlorophyceae
7 – 8 µm diameter
Pediastrum sp.
Chlorophyceae (forms
star shaped clusters
5 – 6 µm
Agmenellum quadruplicatum
Cyanobacteriaceae