By Jashawn C. Colby M, and Andrew O.


  • “A harmful algal bloom (HAB) is an algal bloom that causes negative impacts to other organisms via production of natural toxins, mechanical damage to other organisms, or by other means. HABs are often associated with large-scale marine mortality events and have been associated with various types of shellfish poisonings.”

  • “Harmful algal blooms are caused by, Sunlight, Slow-moving water, Nutrients (nitrogen and phosphorus)Nutrient pollution from human activities makes the problem worse, leading to more severe blooms that occur more often.”

  • “Some produce dangerous toxins in fresh or marine water but even non toxic blooms hurt the environment and local economies.”

  • “The effects of Harmful algal blooms are they produce extremely dangerous toxins that can sicken or kill people and animals. Create dead zones in the water. Raise treatment costs for drinking water. Hurt industries that depend on clean water.”

  • “There are some 4,000 known species of microscopic algae, called microalgae or phytoplankton, in the global ocean. Approximately 300 of these have been identified with periodic explosions of growth, in what amounts to extensive monocultures of the particular species involved. Dense growths of microalgae are broadly termed "blooms."

  • “In recent years, there has been growing alarm over what appears to he an "epidemic" of HABs worldwide.”

  • “Harmful Algal Blooms are also known as “red tides”

Freshwater and marine harmful algal blooms (HABs) can

occur anytime water use is impaired due to excessive accumulations

of algae.”

  • “Long-term effects of persistent HABs on ecosystem structure and

function are not well understood.”

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