Alagal blooms resulting from riverine nutrients in estuarine environments.
No direct riveine supply of nutrients to remote oceans.
Eolian dusts supply nutrients to remote oceans several thousand km away from continents.
Productive seawater of sandy beaches due to low turbity and plenty of nutrients.
High turbidity/sediment load inhibit productivity in muddy beaches and estuaries.
Water pollution caused by sewage and industrial effluents.
Eutrophied waters of the Upper Lake, Bhopal.