Tide pools are created by rocks by the ocean that become filled with seawater. They can vary in size from small and shallow to wide and deep. There are four different zones in tide pools. Most of these zones have abundant marine life. The first zone is called the Splash Zone. This zone is on the beach and usually above where high tide reaches. However, it does get sprayed by large waves and flooded by storms. There is little marine life and vegetation in this zone. The second zone is called the high tide zone. This zone is submerged only at high tide, and small pools of water are collected when the tide goes out. The third zone is called the Middle Tide Zone. This zone spends half of it's time submerged and half of it's time above water. The final zone is the Low Tide Zone. This zone is mostly submerged. It is only dry during low tide. The water levels of these zones depend on how close or far away they are from the ocean. They are also affected by whether the ocean is at high or low tide. When the ocean is at high tide, there are waves crashing over the tide pools, which puts new water in each pool. At low tide, there are no waves crashing over the tide pools. This means that the same water stays in each pool for extended amounts of time. At low tides, the tide pools are no longer submerged and exposed to the sun. In this lab, we are testing which zone has the most acidified water, which is the lowest pH, and at what tide it occurs at. The things which affect this are the amount of marine life in the tide pools and if the tide pools are exposed. They affect the pH because the marine life is performing cellular respiration in the tide pools. At high tide, the water that is acidified due to the carbon dioxide byproduct is replenished by new ocean water. At low tide, the water is exposed so the carbon dioxide keeps on building up, therefore acidifying the water.
High Tide at Leo Carillo:
Low Tide at Leo Carillo: