Macroalgae and seagrasses are ecologically important components of temperate rocky intertidal communities throughout the world. These macrophytes contribute to coastal productivity and provide habitat for invertebrates and fishes.

  • In a recent inventory of algae in the rocky intertidal zone at Cabrillo National Monument, a total of 94 marine algae and seagrasses (7 Chlorophyta, 19 Heterokontophyta - Class Phaeophyceae, 67 Rhodophyta, and 1 Spermatophyta) were identified.