Congrats to Dr. Donn Viviani for successfully defending his Ph.D. Thesis! January 30, 2016January 30, 2016 ~ churchlab Donn Viviani defended his Ph.D. dissertation on January 15, 2016! Title: Coupling between photosynthetic production and bacterial growth in the North Pacific Subtropical Gyre. Big Congrats! Donn and his committee members (L-R): Grieg Steward, Donn Viviani, Matt Church, Craig Nelson, Dave Karl, Megan Donahue