- There are intertidal zones along the coasts all over the world.
It is rich with many nutrients and plenty of oxygen.
- The temperature ranges from the regular temperature of water to air temperatures that can vary from below freezing to scorching hot.
- The salinity is much higher in the intertidal zone because salt water gets trapped in rocks, when the water evaporates it leaves behind many salt deposits.
- In California, tidepools are protected by law. Anyone caught removing or harming tidepool life may be fined as much as $500.
- As the waves crash down, they carry food necessary for survival of the tidepool animals. Each wave carries a plankton soup which is one of the the main diets of a mussel or barnacle. Also, dead plants and animals wash into the tidepool feeding many animals, like hermit crabs, shore crabs, sea gulls and even anemones.
- Tide pools may be formed at low tide when water is trapped in hollows. Under certain conditions, quicksand may be formed.
- Recently proven the key to the barnacles stick is actually salt. The creatures have a special bottom to them and when the salt water comes intact with itit creates a natural solution. The solution substance is incredibly strong and sticky, like glue, allowing the barnacle to stick to surfaces.
From this experiment, you have seen evaporation. The main idea we want you to go away with is that evaporation happens constantly in the Intertidal Zone, and that when evaporation happens, salt is left behind. Tide pools can also contain lots of salt when the water from the tide pool goes away. Salt will stay in rocks or "in other animals" so animals have to have ways to adapt to this. They adapt by ways such as having a hard shell (like crabs do) that keep salt out of their shells and away from their bodies!