Zones of the Ocean

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Zones of the Ocean

• We divide it up to study more specific areas and
  the relevant issues.

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Zones by light

• Euphotic or photic can be as deep as 200m if
  water is clear.
• Dysphotic is not enough light to do
  photosynthesis.

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Littoral zone with animals note the genus names
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Questions?

• What is the name for spray zone where high tide
  spashes up and gives it salt water?
• What is another name for the littoral zone?
• What zone would a starfish be found?
• Why cant a sponge do well in the littoral zone?
• When would an organism at the top of the
  littoral zone be under water?

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Answers

• Supralittoral zone above littoral
• Intertidal
• Top of the sublittoral
• Can never be exposed to the air even when tides
  are really low.
• When there is a spring tide bigger tide due to
  sun/moon lining up.

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Biomass/light/temp with depthStudy and answer
questions on next page
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Questions

• Is the water above the continental shelf included
  in the epipelagic zone?
• Is the biomass/productivity greater at the top of
  bottom of the epipelagic zone?
• Without looking, what temperature was the
  thermocline for this picture?
• Is the mesopelagic zone dysphotic, aphotic or
  euphotic in nature?
• Put these five zones in order from deepest to the
  surface bathypelagic, epipelagic, hadalpelagic,
  abyssopelagic, mesopelagic

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Answers

• Yes
• Bottom, as the nutrients are more plentiful below
  the surface and light is still available.
• 500-1000m
• Generally dysphotic
• hadalpelagic, abyssopelagic, bathypelagic,
  mesopelagic, epipelagic,

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Beach sections
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Questions

• Which beach zone would include the littoral zone?
• Is the berm in the littoral or supralittoral
  zone?
• What two shores are separated by the berm?

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• Swash zone
• Supralittoral zone
• Foreshore/backshore

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