Many areas
of the shallow sea bottom
are covered
with a lush growth
of aquatic flowering plants
adapted
to live submerged in seawater.
These plants
are collectively called seagrasses.
Seagrass beds are strongly influenced
by several physical factors.
The most significant is water motion: currents and waves.
For any given seagrass systems exist
in both sheltered
and relatively open areas,
they are subject to differing amounts
of water motion.
For any given seagrass system,
however,
the water motion is relatively constant.
Seagrass meadows
in relatively turbulent waters
tend to form flat,
extensive carpets.
The seagrass beds,
in turn,
dampen
wave action,
particularly if the blades reach the water surface.
This damping effect can be significant
to the point where just one meter
into a seagrass bed,
the wave motion can be reduced to zero.
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