Coscinodiscus waelesiiPhytopia CD-ROMBigelow Laboratory

EUKARYOTES — having a true nucleusChromophyta - containing chlorophyll a and c

EUKARYOTES (continued): Division Chromophyta Class Cryptophyceae

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

Cryptomonashttp://mac2031.fujimi.hosei.ac.jp/PDB/Images/Mastigophora/Cryptomonas/Cryptomonas.jpgwww.unex.es/botanica/ clases.htm

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

Diatoms

P. Roger Sweet, Indiana University

www.coastalstudies.org/stellwagen/phyto.htm

Diatoms

Looking Down on the Valve

New

Side View

epitheca

hypotheca

pennate

centric

Images from http://www.microscopy-uk.org.uk/mag/wimsmall/diadr.html

pennate

pennate

centric

Silica frustule

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

Dinoflagellates: Some are bioluminescent

http://www.microscopy-uk.org.uk/mag/art98/nocti.html

Noctiluca Noctiluca bloom

www.redtide.whoi.edu/hab/rtphotos/rtphotos.html

EUKARYOTES (continued): Division Chromophyta

Class Prymnesiophyceae (Haptophyceae) Coccolithophores

• CaCO3 skeletal plates• pCO2 increases• DMS production

Near-real-colour SeaWiFS image of a coccolithophore bloom in the Bering Sea, April 1998.earthguide.ucsd.edu/demo/zalaska/08_03_1999a.html

Emiliania huxleyi earthguide.ucsd.edu/images/eg/img/ehuxleyi.gif

www.oregonbd.org/Class/Chap2.htm

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

www.jochemnet.de/fiu/phaeocystis.gif

http://www.icbm.de/~mathmod/pages/projects/questionnaire/figure/phaeocystis.gif

http://www.coastalstudies.org/stellwagen/phyto.htm www.bio.uva.nl/Lesbrieven/TomTahey/bovenbouwtekst3.htm

EUKARYOTES (continued): Division Chromophyta Class Chrysophyceae

Silicolagellates, Pelagomonas, Aureococcus• Aureococcus brown tides

http://techcenter.southampton.liu.edu/~cgobler/BrownTide.htm

EUKARYOTES (continued): Division Chromophyta Class Raphidophyceae

Chattonella, Fibrocapsa, Heterosigma• toxic or harmful blooms

http://www.uio.no/miljoforum/natur/fj_hav/img/chat_0.gif

Chattonella marina

Chattonella antiqua

www.marine.kais.kyoto-u.ac.jp

Cells of Chattonella marina showing different forms (ovoid, pointed-end and sausage-shaped) and a temporary cyst.www.niwa.cri.nz/pgsf/MarineBiodiversity/images/algae6.jpg