SoundHAB: Discovery Bay Bloom

[Megan Black]

For the past week a bloom has been developing in Discovery Bay  
(between Sequim and Port Townsend).  On Saturday July 17th I noted a  
milky coloration in the waters at the junction between the Strait of  
Juan de Fuca and the entrance to Discovery Bay. On Monday, July 19  
with a milky substance that appeared to flow out of the river all the  
way to the head of the bay, with a distinctly reddish flow of water on  
either side.  I wasn't able to sample it until Saturday, July 24th.   
It has changed to a more uniform yellow coloration, and the water  
temperature is ~15 degrees warmer than out in the Strait.

The samples were dominated by the long skinny Prorocentrum graciale   
or possibly P. rostratum.  There are many other species mixed in,  
including something that looks similar to Pyrimamonas, many other  
dinoflagellates, and some Heterosigma.   There are very few diatoms  
present.




http://species-identification.org/species.php?species_group=dinoflagellates&menuentry=soorten&id=87&tab=beschrijving