Definition of algal bloom in English:
 algal bloom
noun ˌalɡəl ˈbluːmˌælɡ(ə)l ˈblum
A rapid growth of microscopic algae or cyanobacteria in water, often resulting in a coloured scum on the surface.
 Example sentencesExamples
-  It is almost impossible to fish the Lancaster Canal between The Bridges due to a surface algal bloom and weed.
 -  That could reduce the invertebrates' predation on algae at the surface, potentially leading to algal blooms and poor water quality.
 -  Blue-green algal bloom forms on the surface of water when there are high levels of nutrients present, combined with warm, sunny and calm conditions.
 -  This subsequently causes the growth of algal blooms, which remove oxygen.
 -  He says this leads to algal blooms and massive seaweed growth, which ends up on the beach, attracting flies.
 
  Definition of algal bloom in US English:
 algal bloom
nounˌælɡ(ə)l ˈblumˌalɡ(ə)l ˈblo͞om
A rapid growth of microscopic algae or cyanobacteria in water, often resulting in a colored scum on the surface.
 Example sentencesExamples
-  It is almost impossible to fish the Lancaster Canal between The Bridges due to a surface algal bloom and weed.
 -  That could reduce the invertebrates' predation on algae at the surface, potentially leading to algal blooms and poor water quality.
 -  This subsequently causes the growth of algal blooms, which remove oxygen.
 -  Blue-green algal bloom forms on the surface of water when there are high levels of nutrients present, combined with warm, sunny and calm conditions.
 -  He says this leads to algal blooms and massive seaweed growth, which ends up on the beach, attracting flies.