Böttjer, D., Karl, D. M., Letelier, R. M., Viviani, D. A., & Church, M. J. (2014). Experimental assessment of diazotroph responses to elevated seawaterpCO2in the North Pacific Subtropical Gyre. Global Biogeochemical Cycles, 28(6), 601–616. doi:10.1002/2013gb004690