PRIMARY PRODUCTIVITY BY THE TOXIC FLORIDA RED-TIDE DINOFLAGELLATE, KARENIA BREVIS: EVALUATION OF BIO-OPTICAL MODEL WITH LABORATORY AND FIELD DATA

Authors: Evens, Terence; REED, ROBERT - NCSU, RALEIGH, NC; REDALJE, DONALD - STENNIS SP CTR, MS; LOHRENZ, STEVEN - STENNIS SP CTR, MS; MILLIE, DAVID - FLMRI, ST. PETERSBURG, FL; SCHOFIELD, OSCAR - IMCS, RUTGERS UNIV, NJ; KIRKPATRICK, GARY - MOTE MARINE LAB, FL

Submitted to: National Symposium on Harmful Marine Algae in the U.S.
Publication Type: Abstract Only
Publication Acceptance Date: 11/9/2003
Publication Date: 12/7/2003
Citation: Evens,T.J.,Reed,R.E.,Redalje,D.G.,Lohrenz,S.E.,Millie,D.F.,Schofield,O., Kirkpatrick,G.J.2003. Primary productivity by the toxic florida red-tide dinoflagellate, karenia brevis: evaluation of bio-optical model with laboratory and field data. National Symposium on Harmful Marine Algae in the U.S.

Interpretive Summary:

Technical Abstract: The Florida red-tide dinoflagellate, Karenia brevis, frequently forms large blooms in the coastal waters of the Southeastern USA and throughout the Gulf of Mexico, and can contribute significantly to the annual production of these areas. Accordingly, understanding the primary productivity of this key HAB species is integral to understanding the community-level processes of these water bodies. Previous work has established oxygenic and fluorometric photosynthesis versus irradiance (P/E) parameters, photoprotective capabilities, pigmentation dynamics, absorption characteristics, carbon acquisition rates, and the spectral irradiance of the ambient light field in both laboratory and in situ bloom conditions. However, to date there have been no attempts to collect all of these disparate pieces of data into a coherent bio-optical model of K. brevis productivity. We will present a wavelength resolved model that is parameterized from laboratory-/field-derived data and validated against both simulated in situ and in situ field measurements. Results from model optimization routines will be discussed.