Bustillos-Guzman, J. Center for Biological Research, jose@cibnor.mx
Lopez-Cortes, D. Center for Biological Research, dlopez@cibnor.mx
Hernandez, F. Center for Biological Research,
Murillo, I. Center for Biological Research,

 
PIGMENT SIGNATURES ASSOCIATED WITH AN ANOXIC COASTAL ZONE: BAHIA CONCEPCION, GULF OF CALIFORNIA.
 
Bahia Concepcion is a coastal lagoon that has bottom anoxic conditions and high pigment concentrations during the summer. The phytoplankton responsible for this pigment increase is enigmatic, therefore we sampled the lagoon to analyze the pigment with a C18-HPLC system to look for signatures of phytoplankton groups. Analysis reveals a very low pigment concentration in the mixed layer with increasing values of chlorophyll a, peridinin, and fucoxanthin below, which peaked at the depth where oxygen dramatically decreases and H2S increases. Below this depth, the more important signatures were 6 pheopigment-like pigments that eluted from the HPLC between the fucoxanthin and the chlorophyll a. These results suggest that diatoms and dinoflagellates are responsible for part of the high chlorophyll a concentration and they might be exploiting remineralized nutrient fluxing from the anoxic layer. The probable origin of the pheopigment-like pigments from the bottom is discussed.
 
Day: Thursday, Feb. 4
Time: 04:30 - 04:45pm
Location: Sweeney Center
 
Code: SS36TH0430S