EUKARYOTES — having a true nucleus Chromophyta - containing chlorophyll a and c Coscinodiscus waelesii Phytopia CD-ROM Bigelow Laboratory.

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Presentation transcript:

EUKARYOTES — having a true nucleus Chromophyta - containing chlorophyll a and c Coscinodiscus waelesii Phytopia CD-ROM Bigelow Laboratory

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

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

Images from http://www.microscopy-uk.org.uk/mag/wimsmall/diadr.html Diatoms pennate pennate Images from http://www.microscopy-uk.org.uk/mag/wimsmall/diadr.html Silica frustule centric

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 Noctiluca Noctiluca bloom www.redtide.whoi.edu/hab/rtphotos/rtphotos.html http://www.microscopy-uk.org.uk/mag/art98/nocti.html

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/img/ehuxleyi.gif

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/questionnaire/figure/phaeocystis.gif http://www.coastalstudies.org/stellwagen/phyto.htm www.jochemnet.de/fiu/phaeocystis.gif www.bio.uva.nl/Lesbrieven/TomTahey/bovenbouwtekst3.htm

Aureococcus brown tides EUKARYOTES (continued): Division Chromophyta Class Chrysophyceae Silicolagellates, Pelagomonas, Aureococcus Aureococcus brown tides http://techcenter.southampton.liu.edu/~cgobler/BrownTide.htm

toxic or harmful blooms EUKARYOTES (continued): Division Chromophyta Class Raphidophyceae Chattonella, Fibrocapsa, Heterosigma toxic or harmful blooms 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 http://www.uio.no/miljoforum/natur/fj_hav/img/chat_0.gif