Halfhill, Rachel2007-11-152007-11-152007-05http://hdl.handle.net/1773/3219Senior Thesis written for Oceanography 444, Spring Quarter 2007 at the University of Washington.This study evaluates the link between red and blue light intensity, chlorophyll concentration and phytoplankton community structure. Light profiles and water samples were taken at thirteen stations in Puget Sound including Dabob Bay (Hood Canal), Elliot Bay (Main Basin), the Strait of Juan de Fuca and the Skagit River Mouth (Whidbey Basin). The results indicate that there is a strong effect on light quality by the phytoplankton in the water column that may affect our current views on the attenuation of light in surface waters.en-USPuget SoundPhytoplanktonChlorophyllLight wavelengthOther