Lichens are very complex living beings that form a symbiosis of an organism formed by a fungus and an algae or cyanobacterium. They are known for interacting with volcanic rocks. moss, is a cosmopolitan phylum of small, simple-organized, non-vascular cryptogamous plants that typically grow in dense tufts, being more common in humid and dark habitats. They are the ones to come after the lichens during primary succession of volcanic island environments. Marine angiosperms, also known as sea grasses, are the flower-producing plants adapted to life in seawater that form marine meadows on the euphotic bottoms of the oceans. They install themselves in the coasts that are already populated by mosses, therefore not being uncommon to see in volcanic islands.
