Guacomo (Jack) R. DiTullio, Ph.D.

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Marine Biomedicine and Environmental Sciences | Faculty | Guacomo (Jack) R. DiTullio, Ph.D.

Giacomo (Jack) R. DiTullio, Ph.D.

Research Interest:
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.

Selected Publications:
1. Tortell, P.D., C.D. Payne, Y.Li, S. Trimborn, B. Rost, W.O. Smith, C. Riesselman, R.B. Dunbar, P. Sedwick and G.R. DiTullio. 2008. CO2 sensitivity of Southern Ocean phytoplankton, Geophys. Res. Lett. 35, L04605, doi:10.1029/2007GL032583

2. Gabric, A.J. P. Matrai, R. Kiene, R. Cropp, J.W.H. Dacey, G.R. DiTullio, R.G. Najjar, R. Simo, D. A.Toole, D.A. delValle and D. Slezak. 2008. Factors determining the vertical profile of DMS in the Sargasso Sea during summer. Factors determining the vertical profile of dimethylsulfide in the Sargasso Sea during summer. Deep Sea Res. II, 55:1505-1518

3. Cottrell, M.T., V.K. Michelou, N. Nemcek, G.R. DiTullio, and D. L. Kirchman. 2008. Carbon cycling by microbes influenced by light in the Northeast Atlantic Ocean. Aquatic Microbial Ecology, 50: 239–250, doi: 10.3354/ame01173

4. Hare, C.E., K. Leblanc, G.R. DiTullio, R.M. Kudela, Y. Zhang, P.A.Lee, Riseman and D.A. Hutchins. 2007. Consequences of increased temperature and CO2 for phytoplankton community structure in the Bering Sea. Mar. Ecol. Prog. Ser. 352: 9-16.

5. Miller, L. and G.R. DiTullio. 2007. Biogenic gases in polynyas. In:Polynyas: Windows into Polar Oceans, W.O. Smith Jr. and D.G. Barber (eds), Elsevier Oceanography Series 74:163-192, Amsterdam, The Netherlands

Giacomo (Jack) R. DiTullio