Tides influence marine ecosystems in various ways. The regular rising and falling of tides create tidal currents that bring nutrients and oxygen to different parts of the ocean, affecting the distribution of marine species and their feeding patterns. Tides also play a role in the reproduction and migration of marine organisms, as well as in shaping coastal habitats such as estuaries and tidal flats. Overall, tides are essential in maintaining the health and biodiversity of marine ecosystems.