Tides influence marine ecosystems in various ways. The rising and falling of tides affect the distribution of nutrients, oxygen levels, and temperature in marine environments. This, in turn, affects the behavior and distribution of marine organisms, including feeding patterns, reproduction, and migration. Tidal currents also help transport nutrients and plankton, which are essential for marine food webs. Overall, tides play a crucial role in shaping the dynamics and biodiversity of marine ecosystems.