Major groups of Phytoplankton

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Presentation transcript:

Major groups of Phytoplankton DIATOMS DINOFLAGELLATES www.imagequest3d.com COCCOLITHOPHORES

Diatoms Microscopic; extremely abundant Important food source for marine organisms Single-cells, chain, loose “clusters” Oil droplets in cell - slow sinking Asterionella – a colony of pennate diatoms; photo by Jan Parmentier Centriclive diatom www.indiana.edu

Photo Credit: Dr. Neil Sullivan, University of Southern Calif. / Diatoms (Division Chrysophyta) Photo Credit: Dr. Neil Sullivan, University of Southern Calif. / National Oceanic & Atmospheric Administration / Dept. of Commerce

Coscinodiscus http://earthguide.ucsd.edu/images/di/img/chloro.jpg www.imagequest3d.com

Chain Diatoms Photo by George Rowland http://life.bio.sunysb.edu/marinebio/pl_08.jpg Diatomaceous Earth – silicaceous shells piled up over millions of years – used for Paint, Silver Polish, Filters, Insulation

Responsible for = red tides, bioluminescence Noctiluca = “night light” Dinoflagellates Microscopic Mostly unicellular Responsible for = red tides, bioluminescence Noctiluca = “night light” Noctiluca Bloom Photo Credit: PJS Franks (Photographer) / National Ocean Service Photo Gallery Photo by George Rowland http://life.bio.sunysb.edu/marinebio/pl_08.jpg

Florida Red Tide Bloom of Karenia brevis In addition to adverse health effects, harmful algal blooms are responsible for the loss of millions of dollars from commercial and recreational fisheries and from tourist industries. Florida Red Tide Bloom of Karenia brevis www.whoi.edu/rtphotos

Florida Coastal Zone Scanner Image of Karenia brevis bloom in Nov 1978 www.whoi.edu/redtide

Coccolithophores One-celled marine plants - live in large numbers, can make water appear milky or chalky Live near surface in brightly lit areas Calcareous ooze = White Cliffs of Dover Alaska and the Bering Sea from SeaWiFS on April 25, 1998. The bright aquamarine water is caused by the huge numbers of coccolithophores. This bloom was present in 1997 and 1998, and appears to be re-occuring in 1999. (Image courtesy Norman Kuring, SeaWiFS Project) Earthobservatory.nasa.gov/library/coccolithophores

Coccolithophores Emiliania huxleyi & Syracosphaera molischi Scanning electron photography by Vita Pariente. Microscopy was done at the Electron Microscopy Center, Texas A&M University.

White Cliffs of Dover Photo Credit: Dover District Council