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"Marine protists are a polyphyletic group of organisms playing major roles in the ecology and biogeochemistry of the oceans, including performing much of Earth's photosynthesis and driving the carbon, nitrogen, and silicon cycles. In addition, marine protists occupy key positions in the tree of life, including as the closest relatives of ...
Marine microorganisms, including protists and bacteria and their associated viruses, have been variously estimated as constituting about 70% or about 90% of the total marine biomass. Marine life is studied scientifically in both marine biology and in biological oceanography .
Background. "Marine protists are a polyphyletic group of organisms playing major roles in the ecology and biogeochemistry of the oceans, including performing much of Earth's photosynthesis and driving the carbon, nitrogen, and silicon cycles.
Introduction Marine microorganisms; Overview; Marine viruses Phages Role of viruses Giant viruses; Prokaryotes Marine bacteria Marine archaea; Eukaryotes Marine protists By trophic mode By locomotion Marine fungi Marine microanimals; Primary producers Cyanobacteria Algae
SHOW ALL QUESTIONS. Marine microorganisms are defined by their habitat as microorganisms living in a marine environment, that is, in the saltwater of a sea or ocean or the brackish water of a coastal estuary.
The term “marine microbe” covers a diversity of microorganisms, including Bacteria, Archaea, Eukaryota, and viruses. These organisms are exceedingly small—only 1/8000th the volume of a human cell and spanning about 1/100th the diameter of a human hair. Up to a million of them live in just one milliliter of seawater.
