![]() ![]() Some species live further up the shore and closer to the high tide line, while others live further down the shore, closer the low tide line. Organisms that live in the intertidal zone tend to form their own communities across the zone’s elevation gradient. ![]() This ecosystem is rife with research opportunities for marine researchers like National Geographic grantee Swapnale Gole, who studies the behavior of sea anemones, crustaceans, and fish in the intertidal zones of the Andaman Islands in India. The zone is completely submerged by the tide once or twice every day. The intertidal zone experiences two different states: one at low tide when it is exposed to the air and the other at high tide when it is submerged in seawater. It is located on marine coastlines, including rocky shores and sandy beaches. Take a ten question quiz about this page.The intertidal zone is an extreme ecosystem because it constantly experiences drastic changes. The energy from tidal forces can be harnessed for electricity using tidal turbines, fences, or barrages.Local factors such as weather can also affect the tides.In a semidiurnal cycle the high and low tides occur around 6 hours and 12.5 minutes apart.There are typically two spring tides and two neap tides each month.The same tidal forces that cause tides in the oceans affect the solid Earth causing it to change shape by a few inches.The largest tidal range is on the coast of the Bay of Fundy in Canada where the tides can change by as much as 40 feet from high to low tide. However, tidal ranges can be much larger near the shore. In the open ocean the tidal range is typically around 2 feet. The tidal range will vary in different locations depending on the location of the Sun and the Moon as well as the topography of the shore line. The tidal range is the difference in sea level between low tide and high tide. Slack water - At the exact time of high tide or low tide there is no current. ![]() Water is flowing away from the shore and towards the ocean.
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