Giacomo (Jack) R. DiTullio

Associate Professor, Grice Marine Lab
College of Charleston, Charleston, SC

Ph.D., University of Hawaii

ditullioj@cofc.edu

Research:
 Photosynthetic pigments as chemotaxonomic markers; carbon, nitrogen, iron, and sulfur biogeochemical cycling. Our research laboratory is focused on phytoplankton physiology and ecology, especially with respect to biogeochemical cycling. We are presently investigating the role of iron and carbon dioxide levels in affecting phytoplankton physiology and community structure in various oceanic environments including the Arctic and Antarctic regions. We are also studying the microbial dimethylsulfide cycle from the molecular level, as it relates to cellular function, to the global scale as it affects climate change processes. 		 

Publications:
 

Hutchins, D.A., C.E. Hare, R.S. Weaver, Y. Zhang, G.F. Firme, G.R. DiTullio, M.B. Alm, S.F. Riseman, J.M. Maucher, M.E. Geesey, C.G. Trick, G.J.Smith, E.L. Rue, J. Conn, and K.W. Bruland, 2002. Phytoplankton Fe limitation in the Humboldt Current and Peru Upwelling, Limnol. Oceanogr. 47:997-1011.

Daly, K.L. W.O. Smith, Jr., G.C. Johnson, G.R. DiTullio, D.R. Jones, C.W. Mordy, R.A. Feely, D.A. Hansell and J.Z. Zhang. 2001. Hydrographic structure and distributions of nutrients and particulate and dissolved carbon in the Pacific sector of the southern ocean. J. Geophysical Research, 106:7107-7124.

DiTullio, G.R., P.N. Sedwick, D.R. Jones, P.W. Boyd, A.C. Crossley and D.A.Hutchins. 2001. Effects of iron, silicate and light on dimethylsulfoniopropionate production in the Australian Subantarctic zone. J. Geophysical Research, 106 (C12), 31,585-31,596.

Boyd, P., A.C. Crossley, G.R. DiTullio, F.B. Griffiths, D.A. Hutchins, B. Quequiner, P. Sedwick and T. Trull. 2001. Control of phytoplankton growth by Fe supply and irradiance on phytoplankton processes in the subantarctic Southern Ocean J. Geophysical Research, 106 (C12): 31,573-31,584.

DiTullio, G.R., J. Grebmeier, M. P. Lizotte, K.R. Arrigo, D.H. Robinson, A. Leventer, J. Barry, M. VanWoert, and R.B. Dunbar. 2000. Rapid and early export of Phaeocystis antarctica blooms to deep water and sediments of the Ross Sea, Antarctica. Nature, 404:595-598.

Arrigo, K.R., G.R. DiTullio, R.B. Dunbar, M.P. Lizotte D.H. Robinson, M. Van Woert and D. L. Worthen. 2000. Phytoplankton taxonomic variability in nutrient utilization and primary production in the Ross Sea. J. Geophysical Research. 105:8,827-8,846.

Sedwick, P.N., G.R. DiTullio and D.J. Mackey. 2000. Iron and manganese in the Ross Sea, Antarctica: Seasonal iron limitation in Antarctic shelf waters. J. Geophysical Research, 105: 11,321-11,336.