Potential applications of nuisance microalgae blooms

Abstract

Algal blooms have become a major concern in coastal areas and the great lakes of the world. Because of their various consequences for aquatic ecosystems and resources, algal blooms are called "harmful algal blooms" (HABs). HABs often become severely detrimental when they involve oneormoretoxin-producingmicroalgaeofvarioustaxonomic origins. The accumulation of algal biomass also has deleteri- ous effects on the ecological status of water. However, appro- priate management strategies can allow the beneficial utiliza- tion of these events by consuming the biomass feedstock in the production of valuable biocommodities, including biofuels, functional food ingredients, UV-absorbing com- pounds, pharmaceutical products, etc. However, if the algal biomass can be harvested prior to the onset of their death phase, nutrients (carbon, nitrogen, and phosphorus) can also be removed from the ecosystem by harvesting the algal blooms. Great progress has been made in the last decade in monitoring and predicting HABs, and a demand is emerging for persuasive postevent management policies that focus on the potential utilization of these blooms as natural renewable bioresources. This review summarizes various potential appli- cations of nuisance algal blooms and the need for scientific research into their economic and industrial potential. Major algal products with great ecological and economic signifi- cance and their contemporary global utilization are analyzed.