Tides affect coastal ecosystems in various ways. The rise and fall of tides influence the flow of nutrients, sediment movement, and water circulation in these ecosystems. This cyclic movement of water helps distribute nutrients and oxygen to different areas, supporting diverse marine life. Tides also play a role in shaping coastlines, creating habitats like salt marshes and tidal flats that are essential for many species. Additionally, tidal fluctuations impact the behavior and feeding patterns of marine organisms, influencing the overall biodiversity and productivity of coastal ecosystems.