Life in the Ocean Plankton: floaters Nekton: swimmers Benthos: bottom dwellers.
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Transcript of Life in the Ocean Plankton: floaters Nekton: swimmers Benthos: bottom dwellers.
![Page 1: Life in the Ocean Plankton: floaters Nekton: swimmers Benthos: bottom dwellers.](https://reader033.fdocuments.us/reader033/viewer/2022061614/5697c0041a28abf838cc4a55/html5/thumbnails/1.jpg)
Life in the OceanPlankton: floaters
Nekton: swimmers
Benthos: bottom dwellers
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PhytoplanktonCarry on photosynthesisDiatoms, coccolithophores, dinoflagellates
ZooplanktonConsumersRadiolarians, forams, others
Plants vs. animals
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PHYTOPLANKTON
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ZOOPLANKTON
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Time as a planktonic organism
Meroplankton Part of life as a plankton; rest as nekton or benthos
HoloplanktonAll of life as plankton
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NektonMany varietiesConsider commercial fisheries
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Commercial fisheriesChanges in last 50 yearsOverfishing
Causes: human population, changes in fishing practices, environmental degradation, poor management, by-catchSolutions: close fishing areas, marine sanctuaries, tighter regulations, consumer choices (http://www.mbayaq.org/cr/SeafoodWatch/web/sfw_regional.aspx)
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AquacultureA solution to overfishing?Pros and cons
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BenthosRocky shoresTide poolsSand and mudDeep seaCoral reefs
Just a few examples
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Where benthic organisms live
EpifuanaLive on top of sediments
InfaunaLive within sediments
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Epifauna
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Infauna (a, b, c, e)
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Land 86%Sea 14%
Benthic 98%Pelagic 2%
Why these patterns?
DISTRIBUTION OF LIFE