EUKARYOTES

1
EUKARYOTES having a true nucleusChromophyta -
containing chlorophyll a and c
Coscinodiscus waelesii Phytopia CD-ROM Bigelow
Laboratory
2
EUKARYOTES (continued) Division Chromophyta
Class Cryptophyceae

• Motile
• Contain phycobiliproteins
• Can be recognized by size and fluorescence
• (flow cytometry)

Cryptomonas http//mac2031.fujimi.hosei.ac.jp/PDB/
Images/Mastigophora/Cryptomonas/Cryptomonas.jpg
www.unex.es/botanica/ clases.htm
3
EUKARYOTES (continued) Division Chromophyta
Class Bacillariophyceae (Diatoms)

• Cannot swim Can regulate buoyancy (some can
  migrate)
• Require silicon Encased in Pill-box shaped
  silica frustule
• Important in coastal areas and spring blooms

http//www1.tip.nl/t936927/art_deco.html
www.oregonbd.org/Class/Chap2.htm
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Diatoms
P. Roger Sweet, Indiana University
www.coastalstudies.org/stellwagen/phyto.htm
5
Diatoms
pennate
pennate
Images from http//www.microscopy-uk.org.uk/mag/wi
msmall/diadr.html
Silica frustule
centric
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EUKARYOTES (continued) Division Chromophyta
Class Pyrrophyta (Dinoflagellates)

• Motile Can migrate vertically
• Red tides and shellfish poisoning
• There are autotrophic and heterotrophic species

www.jochemnet.de/fiu/phaeocystis.gif
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Dinoflagellates Some are bioluminescent
Noctiluca
http//www.microscopy-uk.org.uk/mag/art98/nocti.ht
ml
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EUKARYOTES (continued) Division Chromophyta
Class Prymnesiophyceae (Haptophyceae)
Coccolithophores
Near-real-colour SeaWiFS image of a
coccolithophore bloom in the Bering Sea, April
1998. earthguide.ucsd.edu/demo/zalaska/08_03_1999a
.html

• CaCO3 skeletal plates
• pCO2 increases
• DMS production

www.oregonbd.org/Class/Chap2.htm
Emiliania huxleyi earthguide.ucsd.edu/images/eg/i
mg/ehuxleyi.gif
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EUKARYOTES (continued) Division Chromophyta
Class Prymnesiophyceae (Haptophyceae) Phaeocystis

• Jelly-like colonies clog nets and cause big
  problems on beaches in Europe
• Food-web alterations
• DMS producer
• Common in Antarctic

http//www.icbm.de/mathmod/pages/projects/questio
nnaire/figure/phaeocystis.gif
http//www.coastalstudies.org/stellwagen/phyto.htm
www.bio.uva.nl/Lesbrieven/TomTahey/bovenbouwtekst3
.htm
www.jochemnet.de/fiu/phaeocystis.gif
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EUKARYOTES (continued) Division Chromophyta
Class Chrysophyceae Silicolagellates,
Pelagomonas, Aureococcus

• Aureococcus brown tides

http//techcenter.southampton.liu.edu/cgobler/Bro
wnTide.htm
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EUKARYOTES (continued) Division Chromophyta
Class Raphidophyceae Chattonella, Fibrocapsa,
Heterosigma

• toxic or harmful blooms

Chattonella marina
Cells of Chattonella marina showing different
forms
(ovoid, pointed-end and sausage-shaped) and a
temporary cyst. www.niwa.cri.nz/pgsf/MarineBiodive
rsity/images/algae6.jpg
http//www.uio.no/miljoforum/natur/fj_hav/img/chat
_0.gif