A large division Chlorophyta units
unicellular, colonial, coenobial, multicellular and coenocytic (siphonial)
organisms which live in fresh waters reservoirs, soil and sea. Marine
green algae include about 1000 species representing a little part
of the division. Boreal- Arctic marine Chlorophyta are mainly multicellular
forms. Only a few unicellular species are known and there anr no colonial
forms. Chlorophill prevail in pigment composition and couse green
colour of the algae.
Being related to fresh water algae, the marine green algae prefer
the localities influenced by the river runoff, inhabiting shallow
waters and freshened areas at the coast, fjords, lagoons and estuaries,
which easly endure the organic pollution.
On the Spitsbergen coast, thin filiform small-sized forms with short
life cycle (the seasonal and ephemeral forms) predominate among green
algae. These life forms can sustain the environment conditions of
Arctic littoral, so green algae used to be the main component of the
vegetation in the tidal zone, forming sparde out associations with
low biomass.
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Species found in Hornsund |