thickets sea algae cystoseira barbata in the coastal zone of the sea

alga algae thickets algal flora algobiota algology algosociety barbata black sea bluegreen ceramium cystoseira compressa ecology enteromorpha europe eutrophication fucales grass green macrophytes marine nature oxidation oxygen water synthesis phaeophyceae photosynthesis polisiphonia riparian vegetation saltwater sargassaceae seaweed selfpurification ulva undersea underwater footage shot world wild wildlife