During the last decades there has been a growing interest regarding the study of the ecological function of polyunsaturated aldehydes (PUAs) released by diatoms in oceanic waters. In an effort to better understand the role of PUAs in their natural environment, we studied the persistency of these PUAs in seawater at the range of temperatures in the Bay of C�diz, Spain.  The three major PUAs produced by diatoms (heptadienal, octadienal, and decadienal) were added to seawater collected from the Bay and monitored over the course of 12 days in isothermic culture rooms at 10, 15, and 20�C. Throughout each experiment, samples of water were routinely collected and analyzed by GC-MS. These results indicate that decadienal is persistent over the 12 days at all three temperatures, but the concentrations of heptadienal and octadienal at 15 and 20 �C decrease until they are no longer detectable on the final day of monitoring.

Persistency of polyunsaturated aldehydes in seawater at multiple temperatures

243rd National Meeting (2012)

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