Black Sea – May 23rd, 2013
A phytoplankton bloom can be observed in the Black Sea, coloring its usually dark blue waters a paisley pattern of lighter blue. Putting together the biomass of all the phytoplankton in Black Sea in a usual day of August gives an astronomic number of about six million tons. This photosynthesizing mass (called standing crop) is growing (primary production), and, at the same time, disappearing due to grazing by zooplankton.