Gorga, J. University of California, Santa Barbara, gorga@lifesci.lscf.ucsb.edu
Kerfoot, J. University of California, Santa Barbara, kerfoot@lifesci.lscf.ucsb.edu
Prezelin, B. B.. University of California, Santa Barbara, barbara@icees.ucsb.edu

 
DINOFLAGELLATE CELL COMPOSITION RESPONSES TO OUTDOOR CULTURING IN THE PRESENCE AND ABSENCE OF SOLAR UV RADIATION
 
An outdoor growth facility was developed which allows for simulated in situ growth of unialgal cultures of the red tide organism, Heterocapsa pygmaea. High light adapted cultures were transferred from indoors to 3 outdoor, spectrally distinct, culturing chambers, i. e. PAR only, PAR+UVA radiation and PAR+ UVA+UVB radiation. Solar radiation illuminated outdoor cultures during growth and spectral irradiances were simultaneously monitored. The growth responses and the dependency of photosynthesis on spectral UV radiation are presented in the poster by Kerfoot et al. UV-dependent photophysiology of photosynthesis for this dinoflagellate will be detailed for the August 1998 study in this poster. Data will be presented on the kinetics of change in cell pigmentation, in vivo fluorescence, and whole-cell absorption. If space allows, DOC measurements will also be included. Data will be interpreted in the context of potential change in the organization of photosynthetic components and/or their functionality in this well studied phytoplankton.
 
Day: Wednesday, Feb. 3
Time: Poster
Location: Sweeney Center
 
Code: CS65WE1569S