Ph.D. 2005
The cycling of 210Po by marine plankton and its biogeochemical implications.
Currently at Queens College
Publications from work done at Stony Brook:
Stewart, G.M., S.W. Fowler, and N.S. Fisher. 2008. The bioaccumulation of U- and Th- series radionuclides in marine organisms. In: U-Th Series Nuclides in Aquatic Systems, S. Krishnaswami and J.K. Cochran (Eds.), Elsevier Science, Amstrerdam, pp. 269-305.
Stewart, G.M., J.K. Cochran, P.Masque, N.S. Fisher, and J.C. Miquel. 2007. Particle composition and organic carbon flux at Dyfamed: insight from the short-lived natural radionuclides. Rapp. Comm. Int. Mer Medit. 38: 317.
Stewart, G.M., and N.S. Fisher. 2003. Experimental studies on the accumulation of polonium-210 by marine phytoplankton. Limnology and Oceanography 48: 1193-1201.
Stewart, G.M., and N.S. Fisher. 2003. Bioaccumulation of polonium-210 in marine copepods. Limnology and Oceanography 48: 2011-2019.
Stewart, G.M., N.S. Fisher, J.K. Cochran, S.W. Fowler, and P. Masqué. 2004. The bioaccumulation of 210Po in plankton and its potential use as an organic carbon tracer at the DYFAMED site in the Northwestern Mediterranean. Rapp. Comm. Int. Mer. Medit. 37: 245.
Stewart, G.M., J.K. Cochran, P. Masqué, R.A. Armstrong, J.-C. Miquel, A. Rodriguez, S.W. Fowler, M. Peterson, and N.S. Fisher. 2004. 210Po and 210Pb concentrations, fluxes, particle settling velocities, and organic carbon at the DYFAMED site, Northwestern Mediterranean. Rapp. Comm. Int. Mer. Medit. 37: 246.
Stewart, G.M., S.W. Fowler, J.-L. Teyssié, O. Cotret, J.K. Cochran, and N.S. Fisher. 2005. Contrasting transfer of 210Po and 210Pb across three trophic levels in marine plankton. Marine Ecology Progress Series 290: 27-33.
Buesseler, K.O., C.R. Benitez-Nelson, S.B. Moran, A. Burd, M. Charette, J.K. Cochran, L. Coppola, N.S. Fisher, S.W. Fowler, W.D. Gardner, L.D. Guo, O. Gustafsson, C. Lamborg, P. Masque, J.C. Miquel, U. Passow, P.H. Santschi, N.Savoye, G. Stewart, and T. Trull. In press. An assessment of particulate organic carbon to thorium-234 ratios in the ocean and their impact on the application of 234Th as a POC flux proxy. Marine Chemistry