Harmful algal bloom: catastrophe of aquatic ecosystems and human health

Harmful algal blooms (HABs) are a catastrophic phenomenon in aquatic ecosystems globally, occurring in freshwater bodies and sometimes in marine and brackish waters, due to large numbers of cyanobacteria and microalgae, including dinoflagellates. HABs are dangerous and may be fatal to humans and animals due to toxicity and anoxic conditions. They also cause paralytic shellfish poisoning and kill fish in water bodies. Major factors include eutrophication, rising temperatures, stagnant water, and increased sunlight. Promising paths for early intervention are enabled by efficient monitoring and detection techniques, such as molecular biotechnology, artificial intelligence-driven predictive models, and satellite remote sensing. The negative consequences of HABs can be mitigated through sustainable management techniques such as bioremediation, nutrient load reductions, and regulatory measures. Public awareness and community involvement also play a critical role in preventing and mitigating HAB incidents by encouraging ethical farming methods, reducing waste discharge, and bolstering conservation initiatives. In this short communication, the authors outline the major causes and mitigation strategies for HABs. In addition, modern strategies, policies, and the current status have been discussed.