occurs in results in proliferation of aquatic environment ecosystem process algal bloom process envoPolar A process during which the populations in a community of algae in a marine or freshwater ecosystem undergo rapid growth, resulting in high concentrations of algal cells that occur only periodically and briefly in that ecosystem, relative to their concentrations through the majority of the planetary orbital period. This class is under development. Note that cyanobacterial blooms are often confused with algal blooms. There is no globally recognised threshold beyond which community density enters a bloom state. alga