SS3.08 Application of Automated Technology to Detect Environmental Change
Date: Thursday, June 13, 2002
Time: 10:30:00 AM
Location: View Royal
 
KirkpatrickGJ, Mote Marine Laboratory, Sarasota, USA, gkirkpat@mote.org
Schofield, O, M, Rutgers University, New Brunswick, USA, oscar@ahab.rutgers.edu
Millie, D, F, Florida Marine Research Institute, St Petersburg, USA, dmillie@mote.org
Moline, M, A, California Polytechnic State University, San Luie Obispo, USA, mmoline@calpoly.edu
 
IN SITU, AUTONOMOUS OPTICAL DETECTION AND 3-D MAPPING OF HARMFUL ALGAL BLOOMS
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Recent advances in miniaturized optical technology have been applied to the automated discrimination of the Florida (USA) red-tide dinoflagellate Karenia brevis (Davis) in natural mixed phytoplankton populations. This approach utilizes a liquid waveguide capillary cell (World Precision Instruments, Inc.) and a fiber optic spectrometer (Ocean Optics, Inc.) to measure particulate absorbance spectra of a continuous flow of water. Fourth derivative spectra of the absorbance are compared to a standard spectrum of K. brevis yielding a similarity index. The similarity index is linearly related to the biomass fraction of K. brevis. This system was used recently to map the surface distribution of a K. brevis bloom in the coastal waters of west Florida. This approach is being adapted to provide detection and mapping of K. brevis utilizing autonomous underwater vehicles.