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But
for many organisms there are advantages with waves:
More food is transported to those that live
in silted water.
The mixing of the water aids the exchange of oxygen and carbon
dioxide and nutrients
increase.
Mixing also inhibits the occurrance of a surface
freshwater layer.
The transport of spores, eggs and sperms is made easier.
Protection against mechanical injury
Wave effect is most powerful the higher up
the cliffs one comes. Those organisms that try survive in these areas
must have qualities that prevent them from being crushed, torn lose or
washed away by the waves.
Material used for protection from mechanical injury can
be divided into two types, either rigid and hard or flexible. Rigid and
hard structures are able to withstand force, but unable to change shape.
Flexible materials are easily effected so they can change shape and when
the disturbance ends they return to their original shape without being
injured.
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