Cell-specific Nitrogen Fixation Rates of the Symbiotic Cyanobacterium UCYN-A Vary with Depth and Photoperiod

Mary Rose Gradoville1, Ana Maria Cabello Perez1, Samuel T Wilson2, Kendra A Turk-Kubo1, David M Karl3 and Jonathan P Zehr1, (1)University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, (2)University of Hawaii at Manoa, Honolulu, HI, United States, (3)University of Hawaii at Manoa, Department of Oceanography, Honolulu, HI, United States