algal bloom

https://doi.org/10.1351/goldbook.14434
Rapid increase in the abundance of phytoplankton or benthic algae in a given area, often as a result of an increased availability of nutrients or light, or increase in temperature (e.g., the spring bloom).
Source:
PAC, 2009, 81, 829. (Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)) on page 838 [Terms] [Paper]