At
low tide, a variety of different scenes can be found along the coast : a muddy
estuary,
a sandy beach and a rocky shore.
If
one walks along a rocky shoreline at low tide, one will find that as the water
retreats, it
to resist the effects of the sun's rays and to withstand
their drying influence.
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Successive levels of seaweed.
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Look
down on the rocks, one will see other
seaweed
that is only exposed to a limited extent.
As
a result, successive levels of seaweed can be
recognized,
as shown in the diagram.
is exposed for some considerable time between high tides. This seaweed is therefore
well adapted
exposes seaweed. The seaweed attached high up on the rocks is the first to be
uncovered and it
