In the marine and estuarine environments, the main source of energy is the Sun (although hydrothermal vent community may be treated as exception) which charges the freefloating producers of the ecosystem, the pelagic phytoplankton to provide energy to different biotic communities existing in the every oscillating fluid environment of the earth. Many photosynthetic protests and other small photosynthetic organisms (cyanobacteria and some of the groups of ...
