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Published byRegina Baldwin Modified over 6 years ago
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Diversity of the Heterotrophic Plankton Community
ZOOPLANKTON Diversity of the Heterotrophic Plankton Community
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Major Groups of Zooplankton
Ciliates Rhizopods Rotifers Cladocerans Copepods
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Ciliate Zooplankton Animal-like unicellular heterotrophs.
All have two different types of nuclei. They move and feed by cilia.
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Some common ciliates in the microzooplankton community
Stentor Halteria Tintinnida
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Rhizopod Zooplankton These are amoeboid unicellular heterotrophs
Most common taxa observed in the microzooplankton are thecate like Difflugia.
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Actinopod Zooplankton
These are free-floating cells with radiating axopods. e.g. Actinosphaerium.
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Turbellarian Zooplankton
These are free-living flatworms that live in stagnant pools and eutrophic lakes. e.g. Stenostomum
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Rotiferan Zooplankton
Animal heterotrophs that feed by ciliary pads surrounding the mouth. All have a specialized “jaws” called trophi in the gullet. Many are covered by a lorica.
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Typical Life Cycle of a Rotifer
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Some Rotifers in the Zooplankton
Keratella Polyarthra Filinia
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More Rotifers Brachionus Asplanchna Conochilus
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Annelid Zooplankton Oligochaete segmented worm. e.g. Aeolosoma
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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
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Anostracan Zooplankton
Fairy Shrimp Clam Shrimp Tadpole Shrimp
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Ostracod Zooplankters
Sometimes called seed shrimp. Rarely in the euplankton.
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Cladoceran Zooplankton
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Cladoceran Life Cycle
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Filter-Feeding Cladocerans
Holopedium Diaphanosoma Chydorus
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More Filter-Feeding Cladocerans
Daphnia Bosmina Moina
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Predaceous Cladocerans
Leptodora Polyphemus
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Copepod Diversity Suborder Cyclopoida Suborder Calanoida
Suborder Harpacticoida
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Copepod Life Cycle
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Calanoid Copepods Diaptomus Epischura Limnocalanus
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Cyclopoid Copepods Cyclops Macrocyclops Megacyclops
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Harpacticoid Copepods
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