Tides influence coastal ecosystems in several ways. The rising and falling of tides bring in nutrients, oxygen, and food sources for marine organisms. High tides can flood coastal habitats, providing opportunities for species that thrive in aquatic environments. Tidal currents help disperse larvae and nutrients, contributing to biodiversity and ecosystem health. Additionally, tides help regulate water temperature and salinity levels, which are crucial for the survival of various species in coastal ecosystems.