dirty white foam on the surface of the water of the black sea during calm, ukraine

foam water blacksea pollution algae marine sea phytoplankton bloom aquatic eutrophication brackish contamination hydrosphere ecosystem ripples calm littoral hydrodynamics coastline plankton turbidity debris environment chlorophyll salinity biota waves sediments shore habitat microsystem cyanobacteria anthropogenic benthic surface marinebiology estuary seashore pollutioncontrol biogeochemistry limnology conservation sky coast nature landscape