Image: Athens, Ga. - The billions of marine microorganisms present in every liter of seawater represent a structured ecological community that regulates how the Earth functions in practically every way, from energy consumption to respiration. As inhabitants of the largest environment on Earth, microbial marine systems drive changes in every global system. The function and behavior of this community will determine how the global ocean responds to broader environmental changes, according to a new review article published in the journal Science by University of Georgia marine scientist Mary Ann Moran. Read more here.