Lecture4Phytoplankton

Lecture4Phytoplankton - Phytoplankton These organisms form...

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Introduction to Biological Oceanography (3): John Cullen Phytoplankton These organisms form the base of major food webs in coastal and open ocean environments. They are THE MOST IMPORTANT organisms on Earth. (Ok, so I’m biased)   Chaetoceros
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Introduction to Biological Oceanography (3): John Cullen DeLong and Karl
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Introduction to Biological Oceanography (3): John Cullen Phytoplankton “drifting plants” single cells or chains of cells may have flagella Very often classified by size (why?) Picoplankton (< 2 μ m) Nanoplankton (2-20 μ m) Microplankton (20-200 μ m) Karenia brevis
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Introduction to Biological Oceanography (3): John Cullen Phytoplankton * Cyanobacteria *Diatoms Dinoflagellates Prymnesiophytes (Haptophytes) Prasinophytes Chrysophytes Raphidophytes * Chlorophytes (Green Algae) Cryptophytes *Benthic forms are common Eukarya
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Introduction to Biological Oceanography (3): John Cullen Diatoms CO 2 + 2H 2 O ~8 h ν →  (CH 2 O) +H 2 O +O 2 Phytoplankton – are photosynthetic P. Roger Sweet, Indiana University Dinoflagellates www.whoi.edu/redtide/rtphotos/ Photosynthesis
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Introduction to Biological Oceanography (3): John Cullen Light energy is collected by photosynthetic pigments All plants have chlorophylls and carotenoids Some groups (cyanobacteria, cryptophytes, red algae) have phycobilins (PE, PC) Pigments are used to infer species composition Pigmentation varies with growth conditions
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Introduction to Biological Oceanography (3): John Cullen All phytoplankton were not made equal. .. Even though phytoplankton are often considered as light absorbers, packages of pigment, or organic particles, they are biologically very diverse - Phylogenetic - Metabolic - Habitat/Niche Space
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Introduction to Biological Oceanography (3): John Cullen Cyanobacteria Giovannoni and Stingl
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Introduction to Biological Oceanography (3): John Cullen Cyanobacteria : Main players in the pelagic environment are: Synechococcus Prochlorococcus Trichodesmium Picophytoplankton “Net” plankton
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Introduction to Biological Oceanography (3): John Cullen Picophytoplankton Smallest of the plankton (< 2 μ m), but numerous (100,000 cells per ml or more) so they contribute substantially to global primary production Contributions recognized mid 1970’s (why?) Autotrophs, contain photosynthetic pigments
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Introduction to Biological Oceanography (3): John Cullen Photosynthetic Picoplankton Main genera are Synechococcus and Prochlorococcus •Discovered in 1979 (Waterbury et al. 1979); contain chlorophyll a, which fluoresces red
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This note was uploaded on 12/12/2011 for the course BIOL 450 taught by Professor Ms.richardson during the Fall '10 term at South Carolina.

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Lecture4Phytoplankton - Phytoplankton These organisms form...

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