018-Plankton - Plankton Marine life 3 categories: 1....

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Plankton
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Marine life 3 categories: 1. Benthos : bottom dwellers; sponges, crabs 2. Nekton : strong swimmers- whales, fish, squid 1. Plankton : animal/plants that drift in water. The have little control over their movement. Includes: diatoms, dinoflagellates, larvae, jellyfish, bacteria.
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What physical factors are plankton subject to? 1. Waves 2. Tides 3. Currents
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Plankton classified by: Size Habitat Taxonomy
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Size: Picoplankton (.2-2 µm) bacterioplankton Nanoplankton (2 - 20 µm) protozoans Microplankton (20-200 µm) diatoms, eggs, larvae Macroplankton (200-2,000 µm) some eggs, juvenile fish Megaplankton (> 2,000 µm) includes jellyfish, ctenophores, Mola mola
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Holoplankton - spends entire lifecycle as plankton Ex. Jellyfish, diatoms, copepods Meroplankton - spend part of lifecycle as plankton Ex. fish and crab larvae, eggs Habitat: snail lobster fish
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Life cycle of a squid Squid experience benthic, planktonic, and nektonic stages Squid are considered meroplankton (opposite = holoplankton )
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Pleuston - organisms that float passively at the seas surface Ex. Physalia, Velella Neuston – organisms that inhabit the uppermost few mm of the surface water Ex. bacteria, protozoa, larvae; light intensity too high for phytoplankton Habitat: From The World Book (TM) Multimedia  Encyclopedia (c) 1999 World Book,  Inc., 525 W. Monroe, Chicago, IL  60661.  All rights reserved.  Inc. Neuston net
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018-Plankton - Plankton Marine life 3 categories: 1....

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