stone fouling with blue-green, diatoms and green unicellular algae at low tide, black sea

low tide black sea green bluegreen diatoms algae nladophora thickets algal flora algobiota algology algosociety chondria obtusa coastline crimea florideophyceae krimea laurencia papillosa laurencieae macrophytes nature oxygen in water synthesis palisada thuyoides photosynthesis plantae rhodophyta riparian vegetation saltwater ecology seascape seaweed selfpurification of singlecelled stones surface undersea underwater wildlife