Marine Ecosystems

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Factors that divide the ocean into distinct marine life zones : the availability of sunlight the distance from shore water depth.

Different Zones of Marine Ecosystem:

Different Zones of Marine Ecosystem

Intertidal Zone:

Intertidal Zone The area where land and sea meet and overlap (the zone between high and low tides)

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The upper part of the ocean into which sunlight penetrates. Photic Zone

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Benthic Zone Lowest level of a Ocean, including the sediment surface and some sub-surface layers.


Estuary A semi-enclosed costal body of water where fresh river water mixes with salty sea water.

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Kelp Forests:

Kelp Forests Kelp forests are underwater areas with a high density of Kelp. They are recognized as one of the most productive and dynamic ecosystems on Earth

Marine Organisms:

Marine Organisms

Food Chain:

Food Chain Phytoplankton Unicellular algae Zooplankton Planktonic animals that feed on phytoplankton Nekton Animals that feed on Zooplankton

Phytoplankton (Plant Plankton):

Phytoplankton (Plant Plankton) The most important community of primary producers in the ocean. They are the foundation of oceanic food chain

Zooplankton (Animal Plankton) :

Zooplankton (Animal Plankton) Krill Jelly fish Passively drifting or weak swimming organisms that cannot move independently of ocean currents.


Nekton Organisms that can move independently of ocean currents by swimming or other means of propulsion.

Coral Reefs:

Coral Reefs

Star Fish:

Star Fish Animals that live on or near coral reefs

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Animals that live on or near coral reefs

Benthos :

Benthos The forms of marine life that live on the ocean floor.

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