Download - Surviving the extremes in a rockpool
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Surviving the extremes in a rockpool
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Twice each day the gravitational pull of the sun and moon causes the tides to moves in and out.
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The area where the tides move in and out is called the intertidal zone.
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Rockpools allow seaweed and marine animals to hang on and the pools often remain wet when the tide is out.
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As the seawater dries out in this pool it becomes more salty.
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Rockpool animals and plants are hit by powerful waves.
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Seaweed can be ripped from rocks
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Floating animals are washed onto beaches.
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Animals are exposed to predators.
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When the tide moves out, much of the area dries out.
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At low tide in summer, the plants and animals get cooked in the hot sun.
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Sand can be dumped into rockpools covering the plants and animals.
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Mud can cover some rockpools if the currents change.
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Rain at low tide can make rockpools less salty which will affect some marine plants and animals.
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Water from stormwater drains can pollute the sea around them.
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Oil pollution from the land or sea will kill most seaweeds and marine animals.
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Sometimes marine animals are taken by people.
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Rockpools in the intertidal zone is one of the most difficult environments to survive in.