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Dinoflagellates

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By Alex Yoo. Dinoflagellates. Key Features. Use a pair of flagella in order to move. They spin as they swim. The flagella are on grooves. Most are photosynthetic and unicellular but some live in colonies. They have a cellulose cell wall that looks like armor.

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Presentation Transcript
key features
Key Features
  • Use a pair of flagella in order to move. They spin as they swim. The flagella are on grooves.
  • Most are photosynthetic and unicellular but some live in colonies. They have a cellulose cell wall that looks like armor.
  • During cell division, the nuclear envelope stays intact and the microtubules pass through the nucleus to keep it the nucleus oriented the right way. Then it does binary fission-like division
life cycle
Life Cycle
  • Motile haploid stages
  • Population growth usually through asexual reproduction
  • In the diagram, brown = motile, whitish color = sessile
some interesting facts
Some Interesting Facts
  • Pfiesteria, a species of dinoflagellates, causes red tides, algal blooms that cause fish to die and harm humans
  • Some species make their own light through bioluminescence
  • The first dinoflagellate discovered was called Pyrrhophyta or “fire algae” because of its bioluminescence
more interesting facts
More Interesting Facts
  • Zooxanthellae help build coral reefs by providing nutrients to its symbiont coral
  • Besides diatoms, dinoflagellates are the largest group of eukaryotic algae
significance to humans
Significance to Humans
  • Red tides harm not only fish, but also humans
  • Half of all the dinoflagellates are photosynthetic and provide oxygen
examples of dinoflagellates
Examples of Dinoflagellates
  • Ordered from left to right:
  • Pfiesteria
  • Ceratium tripos
  • Zooxanthellae
  • Togula britannica