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Ocean current in Gulf of Mexico linked to red tide

Results can help provide warning of red tide conditions in Florida's coastal regions

Date:
January 12, 2016
Source:
University of Miami Rosenstiel School of Marine & Atmospheric Science
Summary:
A major ocean current in the Gulf of Mexico plays an important role in sustaining Florida red tide blooms, a new study indicates. The research team suggests that the position of the Loop Current can serve as an indicator of whether the algal bloom will be sustained, and provide warning of possible hazardous red tide conditions in coastal areas.
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Toxic Karenia brevis blooms (commonly known as Florida red tides) occur often on the West Florida Shelf. These harmful algal blooms are hazardous to marine life as well as to humans (through neurotoxic shellfish poisoning or aerosolized toxins, which cause respiratory distress).
Credit: P.Schmidt, Charlotte Sun

A new study found that a major ocean current in the Gulf of Mexico plays an important role in sustaining Florida red tide blooms. The University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science research team suggest that the position of the Loop Current can serve as an indicator of whether the algal bloom will be sustained, and provide warning of possible hazardous red tide conditions in coastal areas.

Florida red tide is a harmful algal bloom produced by the dinoflagellate Karenia brevis that causes respiratory impairment in humans and marine life, and is responsible for shellfish poisoning.

The researchers collected data of Karenia brevis concentrations, river outflows, wind conditions, and sea surface heights to study the physical conditions during periods of large Karenia brevis blooms and periods of no bloom. This research looked at the continuation of a bloom and not the formation of a red tide bloom.

They found that when the Loop Current is in a northern position, it allow a bloom to continue when other conditions were favorable, but when in a southern position a bloom could not be sustained. The Loop Current, which enters the Gulf of Mexico through the Yucatan Straits, is one of the most important features in the Gulf ocean circulation system.

"Knowing the approximate position of the Loop Current can be an indicator if a bloom will be sustained, and provide a warning for possible hazardous conditions," said UM Rosenstiel School Ph.D. student Grace Maze, lead author of the study.


Story Source:

Materials provided by University of Miami Rosenstiel School of Marine & Atmospheric Science. Note: Content may be edited for style and length.


Journal Reference:

  1. G. Maze, M.J. Olascoaga, L. Brand. Historical analysis of environmental conditions during Florida Red Tide. Harmful Algae, 2015; 50: 1 DOI: 10.1016/j.hal.2015.10.003

Cite This Page:

University of Miami Rosenstiel School of Marine & Atmospheric Science. "Ocean current in Gulf of Mexico linked to red tide: Results can help provide warning of red tide conditions in Florida's coastal regions." ScienceDaily. ScienceDaily, 12 January 2016. <www.sciencedaily.com/releases/2016/01/160112214449.htm>.
University of Miami Rosenstiel School of Marine & Atmospheric Science. (2016, January 12). Ocean current in Gulf of Mexico linked to red tide: Results can help provide warning of red tide conditions in Florida's coastal regions. ScienceDaily. Retrieved September 27, 2016 from www.sciencedaily.com/releases/2016/01/160112214449.htm
University of Miami Rosenstiel School of Marine & Atmospheric Science. "Ocean current in Gulf of Mexico linked to red tide: Results can help provide warning of red tide conditions in Florida's coastal regions." ScienceDaily. www.sciencedaily.com/releases/2016/01/160112214449.htm (accessed September 27, 2016).