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ZOOPLANKTON

ZOOPLANKTON. Diversity of the Heterotrophic Plankton Community. Major Groups of Zooplankton. Ciliates Rhizopods Rotifers Cladocerans Copepods. Ciliate Zooplankton. Animal-like unicellular heterotrophs . All have two different types of nuclei. They move and feed by cilia.

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ZOOPLANKTON

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  1. ZOOPLANKTON Diversity of the Heterotrophic Plankton Community

  2. Major Groups of Zooplankton • Ciliates • Rhizopods • Rotifers • Cladocerans • Copepods

  3. Ciliate Zooplankton • Animal-like unicellular heterotrophs. • All have two different types of nuclei. • They move and feed by cilia.

  4. Some common ciliates in the microzooplankton community • Stentor • Halteria • Tintinnida

  5. Rhizopod Zooplankton • These are amoeboid unicellular heterotrophs • Most common taxa observed in the microzooplankton are thecate like Difflugia.

  6. Actinopod Zooplankton • These are free-floating cells with radiating axopods. e.g. Actinosphaerium.

  7. Turbellarian Zooplankton • These are free-living flatworms that live in stagnant pools and eutrophic lakes. e.g. Stenostomum

  8. Rotiferan Zooplankton • Animal heterotrophsthat feed by ciliary pads surrounding the mouth. • All have a specialized “jaws” called trophi in the gullet. • Many are covered by a lorica.

  9. Typical Life Cycle of a Rotifer

  10. Some Rotifers in the Zooplankton • Keratella • Polyarthra • Filinia

  11. More Rotifers • Brachionus • Asplanchna • Conochilus

  12. Annelid Zooplankton • Oligochaete segmented worm. e.g. Aeolosoma

  13. Arthropod Zooplankters Most freshwater taxa are Crustaceans (arthropods with cephalothorax and abdomen) • Order Anostraca • Order Ostracoda • Order Cladocera • Order Copepoda • Suborder Calanoida • Suborder Cyclopoida • Suborder Harpacticoida

  14. Anostracan Zooplankton • Fairy Shrimp • Clam Shrimp • Tadpole Shrimp

  15. OstracodZooplankters • Sometimes called seed shrimp. Rarely in the euplankton.

  16. Cladoceran Zooplankton

  17. Cladoceran Life Cycle

  18. Filter-Feeding Cladocerans • Holopedium • Diaphanosoma • Chydorus

  19. More Filter-Feeding Cladocerans • Daphnia • Bosmina • Moina

  20. Predaceous Cladocerans • Leptodora • Polyphemus

  21. Copepod Diversity • Suborder Cyclopoida • Suborder Calanoida • Suborder Harpacticoida

  22. Copepod Life Cycle

  23. Calanoid Copepods • Diaptomus • Epischura • Limnocalanus

  24. Cyclopoid Copepods • Cyclops • Macrocyclops • Megacyclops

  25. Harpacticoid Copepods

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