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Plankton

The wanderers of the ocean. Plankton. Two Categories. Autotrophic Photosynthetic Responsible for 92% of marine primary production. Heterotrophic Primary and secondary Consumers. Phytoplankton. Zooplankton. Holoplankton. Organisms that live as plankton their entire lives. Meroplankton.

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Plankton

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  1. The wanderers of the ocean Plankton

  2. Two Categories • Autotrophic • Photosynthetic • Responsible for 92% of marine primary production • Heterotrophic • Primary and secondary Consumers Phytoplankton Zooplankton

  3. Holoplankton • Organisms that live as plankton their entire lives.

  4. Meroplankton • Organisms that live part of their lives as plankton, but may grow into nekton or benthos.

  5. Meroplankton Cone Shell larva Cone Shell adult

  6. Diatoms • The most efficient photosynthesizers known. • Most dominant and productive of phytoplankton • Have a rigid cell wall made of silica called a frustule.

  7. Dinoflagellates • 2nd most abundant phytoplankton • Characterized by one or two whip-like flagella • Most are autotrophs

  8. Coccolithophores • Single-cell autotrophs • Consist of shells called coccolithswhich are made of calcium carbonate.

  9. Silicoflagellates • Both autotrophic and heterotrophic • Simpler than diatoms • Internal supporting structures made of silica

  10. Cyanophytes • Bacteria with chlorophyll, so they’re… • They’re consumed by heterotrophic bacteria

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