HARMFUL ALGAL BLOOMS (HAB S ). What are Harmful Algal Blooms (HABs)? Harmful algal blooms or HABs are algal blooms composed of phytoplankton known to.

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Presentation transcript:

HARMFUL ALGAL BLOOMS (HAB S )

What are Harmful Algal Blooms (HABs)? Harmful algal blooms or HABs are algal blooms composed of phytoplankton known to naturally produce biotoxins, they can occur when certain types of microscopic algae grow quickly in water, forming visible patches that may harm the health of the environment, plants, or animals. HABs can deplete the oxygen and block the sunlight that other organisms need to live, and some HAB-causing algae release toxins that are dangerous to animals and humans. HAB can occur in marine, estuarine, and fresh waters.

What causes HABs? Eutrophication Warm temperatures Lots of sunlight Runoff Farming Human sewage Pesticides

Nitrogen Cycle

Phosphorous Cycle

HABs in the United States

whoi.edu/red tide/page.do ?pid=18116& tid=542&cid= 55970&ct=61 &article=330 66

whoi.edu/red tide/page.do ?pid=18116& tid=542&cid= 55970&ct=61 &article=330 66

Toxic Diatom and Dinoflagellate HABs Diatoms – ASP: Amnesic Shellfish Poisoning Dinoflagellate – PSP: Paralytic Shellfish Poisoning – NSP: Neurotoxic Shellfish Poisoning – CFP: Ciguatera Fish Poisoning – DSP: Diarrhetic Shellfish Poisoning

PSP: Paralytic Shellfish Poisoning

CFP: Ciguatera Fish Poisoning

DSP: Diarrhetic Shellfish Poisoning

Impact of HABs on us! Food poisoning Inner ear infections No swimming at beaches/lakes/rivers Economic impacts – Fisheries – Tourism Others?