||Aggregations of microbes within the water column that have detectable, visible color.
Microbial communities suspended in the water column can reach high concentrations
and even be the dominant biota in an area, both numerically and in terms of biomass.
Suspended free-floating microbes, as well as those adsorbed to suspended particulates
are important in the marine food web. The concentration of bacterial communities has
been linked to discoloration of the water column (Hansel and Francis 2006) via oxidation
of molecular compounds in the water, such as manganese and iron.