Ayoub, L. M.. BBSR, layoub@bbsr.edu
, . M.. ,

 
INTENSIVELY LEARNING OPTICAL OCEANOGRAPHY: PHOTOINHIBITION OF CHLOROPHYLL A FLUORESCENCE
 
This study investigated the photoinhibition of phytoplankton chlorophyyll a fluorescence in surface waters of East Sound, San Juan Islands, Washington, USA. The fluorescence efficiency was defined as the magnitude of fluorescence (volts) normalized to an absorption coefficient and also to an extracted chlorophyll a concentration. Continuous depth profiles of fluorescence intensity were measured with a WETstar in-situ fluorometer. Profiles of specttral particulate absorption coefficients were measured with an ac-9. Chlorophyll a concentrations were measured for discretely-sampled waters by fluorometric analysis of acetone extracts. Phytoplankton absorption coefficients were determined for discrete samples by the Quantiative Filter Technique. Photoinhibition was assessed as a reduction in the reduction in the relative fluorescence efficiency. Surface photoinhibition of fluorescence was evident on the same day at two different sites in East Sound.
 
Day: Thursday, Feb. 4
Time: Poster
Location: Sweeney Center
 
Code: SS53TH1006S