Sasha Tozzi

Candidate
M.S. IMCS - Rutgers University, NJ
B.S. "Federico II" University of Naples, Italy

Phytoplankton Ecology Website

Major Advisors

Walker Smith, Biological Sciences

Research Experience Top

June 2005 to present

• CORSACS: Controls on Ross Sea Algal Community Structure (Prof. Jack DiTullio and Prof. Walker O. Smith)
• IVARS:Interannual Variations in the Ross Sea (Prof. Walker O. Smith).
• Variable fluorescence in Monterey Bay and California Current (Drs. Francisco P. Chavez and Zbigniew Kolber).
• Primary production and nutrient limitation in the Gulf of Mexico (Drs.Jim Ammerman, Tom R. Fisher, Antonietta Quigg)

January 2003 to June 2005

• IVARS:Interannual Variations in the Ross Sea (Prof. Walker O. Smih).
  
• Phytoplankton Bloom Characterization in the York River, VA (Prof. Larry W. Haas).
  
• Phosphorus limitation in the Mississippi river plume effect on phytoplankton physiology and productivity (Dr. Jim Ammerman).
  

September 2001 to January 2003

• Diatom vs coccolithophorids competition in a variable nutrient environment with a droop model
• iron limitation in the Southern Ocean (SOFeX) effects on phytoplankton physiology and productivity (Dr. Zbigniew Kolber and Prof. Paul Falkowski)
• phosphorus limitation in the Mississippi river plume effect on phytoplankton physiology and productivity (Dr. Jim Ammerman).

January 1999 - September 2001

• M.S. thesis on diatom vs coccolithophorids competition in a variable nutrient environment with (advisor Prof. Paul Falkowski)
• Bioptics at LEO-15 (NJ coast) in relation to phytoplankton dynamics and remote sensing (Prof. Oscar Schofield)

November 1997 - September 1998

• contract with the University of Rome "Tor Vergata" and C.N.R., to review the available literature on the calibration of visible remote sensing data in the Southern Oceans.

March 1997 - March 1998

• post degree practical training in the Biological Oceanography Laboratory at the Stazione Zoologica "A. Dohrn" Naples, Italy, working on collection and processing of pigment, light and remote sensing data (Dr. Maurizio Ribera d'Alcalà).

June 1995 - March 1997

• B.S. Thesis in the Biological Oceanography Laboratory at the Stazione Zoologica "A. Dohrn" Naples, Italy, working on the Marechiara (a time series at a fixed coastal station in the Gulf of Naples) data-set (Dr. Maurizio Ribera d’Alcalà and of Prof. Gian Carlo Carrada).
• attended the IFA – C.N.R. (Institute of Atmosphere Physics), to learn techniques on utilization of visible and thermal remote sensing data (CZCS, SeaWiFS and AVHRR), (Dr. Rosalia Santoleri)

Teaching Experience Top

Cruises and Field Experience Top

Awards Top

Membership in Professional Societies Top

Publications Top

W. O. Smith Jr., S. Tozzi and V. A. Asper (2008) Continuos fluorescence measuraments in the Ross Sea, Antarctica: scales of variability. Journal of Geophysical Research (Submitted)

W. O. Smith Jr., S. Tozzi, G. R. DiTullio, M. Dinnimand, O. Mangoni, M. Modigh and V. Saggiomo (2007) Phytoplankton photosynthetic pigments in the Ross Sea: Patterns and relationships among functional groups. Journal of Marine Systems (accepted)

J. B. Sylvan, A. Quigg, S. Tozzi, and J.W. Ammerman (2007) Eutrophication induced phosphorus limitation in the Mississippi River Plume: Evidence from fast repetition rate fluorometry. Limonology and Oceanography 52(6) 2679-2685

W. O. Smith Jr., A. R. Shields, G. Catalano, J. A. Peloquin, S. Tozzi, M. S. Dinniman and V. A. Asper (2006) Interannual Variations in Nutrients, Net Community Production, and Biogeochemical Cycles in the Ross Sea. Deep Sea Research 53(8-10) 815-833

S. Tozzi, O. Schofield,  P. Falkowski (2004) Historical climate change and ocean turbulence as selective agents for two key phytoplankton functional groups. MEPS 274:123-132

Coale, K. H. , K. S. Johnson, F. P. Chavez, K. O. Buesseler, R. T. Barber, M. A. Brzezinski, W. P. Cochlan, F. J. Millero, P. G. Falkowski, J. E. Bauer, R. H. Wanninkhof, R. M. Kudela, M. A. Altabet, B. E. Hales, T. Takahashi, M. R. Landry, R. R. Bidigare, X. Wang, Z. Chase, P.G. Strutton, G. E. Friederich, M. Y. Gorbunov, V. P. Lance, A. K. Hilting, M. R. Hiscock, M. Demarest, W.T. Hiscock, K.F. Sullivan, S.J. Tanner, R.M. Gordon, C.N. Hunter, V.A. Elrod, S.E. Fitzwater, J.L. Jones, S. Tozzi, M. Koblizek, A.E. Roberts, J. Herndon, J. Brewster, N. Ladizinsky, G.  Smith, D. Cooper, D. Timothy, S.L. Brown, K. E. Selph, C.C. Sheridan, B.S. Twining, Z. I. Johnson (2004) Southern Ocean Iron Enrichment Experiment (SOFeX): Carbon Cycling in High- and Low-Si Waters, Science (304) 408-414

Moline, MA, Arnone, R, Bergmann, T, Glenn, S, Oliver, M, Orrico, C, Schofield, O, Tozzi, S. (2004) Variability in spectral backscatter estimated from satellites and its relation to in-situ measurements in optically complex coastal waters.  International Journal of Remote Sensing 25:(7-8),1465-1468 and poster presentation at Oceans from Space 2000, Venice, Italy, October 2000

S. Tozzi, O. Schofield, M. A. Moline, T. Bergmann, M. Crowley , R. Arnone.(2004) Variability in measured and modeled remote sensing reflectance and comparison of SeaWiFS and in situ chlorophyll a distribution for coastal waters at LEO-15. International Journal of Remote Sensing. 25:(7-8)1469-1472, and poster presentation at Oceans from Space 2000, Venice, Italy, October 2000

S. Tozzi and M. Ribera d'Alcalà, 2000. Primary Production and Remote Sensing. In Remote Sensing and Marine Ecology. Ed. by A. Argentieri, A. Fianchini and L. Rossi, ESA/ESRIN, pp1-19

E. Böhm, B. Buongiorno Nardelli, C. Brunet, R. Casotti, F. Conversano, F. Corato, E. D'Acunzo, F. D'Ortenzio, D. Iudicone, L. Lazzara, O. Mangoni, M. Marcelli, S. Marullo, L. Massi, G. Mori, I. Nardello, C. Nuccio, M. Ribera d'Alcalà, V. Saggiomo, R. Santoleri, M. Scardi, S. Sparnocchia, S. Tozzi and S. Zoffoli, SYMPLEX Experiment: first results on oceanic mesoscale dynamics and related primary production from AVHRR and SeaWIFS satellite data and field experiments. The European Symposium on Remote Sensing, EUROPTO Series, (21-25 September 1998 - Barcelona SPA), SPIE Proceedings-The International Society for Optical Engineering, Vol. 3496, pp.137-148

M. Ribera d'Alcalà and S. Tozzi (1998) Topical problems in Biological Oceanography, Realtà Nuova, Ecologia III, 55-78

S. Tozzi, B. Buongiorno Nardelli and F. d'Ortenzio: Distribution of chlorophyll a in the Eastern Mediterranean in relation to sub-basin structures: analysis of the remotely sensed data, proceedings of XII A.I.O.L. Congress (18-21 September 1996 - Vulcano ITA), M. Piccazzo, 1997, vol. 1, 213-224
 

S. Tozzi, J. A. Peloquin, J. Dreyer (2006) Development of a new FlowCAM flow cytometer protocol for processing samples with a wide range of different sized phytoplankton from the Ross Sea Antarctica. (Summer ASLO Meeting Victoria, B.C. June 4-9, 2006)

S. Tozzi, J. A. Peloquin and W. O. Smith Jr (2006) Characterization of Ross Sea phytoplankton dynamics and photosynthetic activity measured with variable fluorescence (February 20-24 Ocean Sciences AGU/ASLO/TOS Joint Meeting Honolulu, Hawaii)

W. O. Smith, Jr., M. Dinniman, G. DiTullio, and S. Tozzi (2006) The climatology of phytoplankton pigments in the Ross Sea (February 20-24 Ocean Sciences AGU/ASLO/TOS Joint Meeting Honolulu, Hawaii)

W. O. Smith Jr., S. Tozzi, G. DiTullio, O. Mangoni, and V. Saggiomo (2005) Phytoplankton photosynthetic pigments in the Ross Sea: Patterns and relationships among functional groups(3rd International Conference on the Oceanography of the Ross Sea Antarctica10 - 14 October, Venice, Italy)

Smith, W.O.Jr., G. Catalano, A. R. Shields, J. A. Peloquin, S. Tozzi and V. A. Asper (2004) Biogeochemical Budgets in the Ross Sea:  Variations Among Years. (September 27 – October 1, Korcula, Croatia)

Tozzi S., E. S. Darrow, R. H. Condon, L. W. Haas, The Spring Phytoplankton Bloom in the York Rivere staury, Virginia. Characterization and Interanual variability. ASLO meeting (Febbruary 15-20, 2004 Honolulu, Hawaii)

Tozzi S., R. H. Condon, E. S. Darrow, A. C. Spivak, L. H. Brasseur, L. W. Haas, Characterization and enviromental regulation of the spring bloom in the York rivere estaury, Virginia, USA. ERF meeting (September 14-18, 2003 Seattle, Washington State)

Sylvan, JB Quigg, A, Tozzi, S., Natale, F, Kolber, Z, Ammerman, JW, Extensive evidence of summer phosphorus limitation in the Mississippi river plume 2003 ASLO meeting (February 8-14, Salt Lake City, Utah)

M. Gorbunov, S. Tozzi, M. Koblizek, Z. Kolber, P. Falkowski, Photosynthetic response of phytoplankton during the Southern Ocean Iron Experiment (SOFEX). 2002 AGU meeting (December 6-10, San Francisco, CA)

J. Sebbo, T. Bergmann, J. Kerfoot, S. Tozzi, O. Schofield, Light Stress and TEP Production in Phytoplankton Communities in Turbid Coastal Waters, 2002 Ocean Sciences AGU/ASLO Joint Meeting Honolulu, Hawaii

S. Tozzi and P. G. Falkowski, Competition and Succession of Key Marine Phytoplankton Functional Groups in a Variable Environment, Annual  CODENET meeting  (August 25-29, 2001- Blagnac)

S. Tozzi, O. Schofield, M. A. Moline, T. Bergmann, M. Crowley , R. Arnone,Variability in measured and modeled remote sensing reflectance and comparison of SeaWiFS and in situ chlorophyll a distribution for coastal waters at LEO-15, Ocean Optics XV (October16-20, 2000 - Monaco)

M.A. Moline, O. Schofield, S. Glenn, S. Tozzi, M. Crowley, M. Demarest, R. Arnone, P. Bisset, Assessment of Phytoplankton Dynamics at the Long-term Ecosystem Observatory (LEO-15) Using in Water Optics and Remote Sensing, 2000 ASLO Meeting (June 5-9, 2000 - Copenhagen)

S. Tozzi, O. M. Schofield, J. J. Grzymski, T. Bergmann, M. A. Moline, D. Peterson, Variability of the Spectral Signatures of Coastal Waters Measured and Modeled for the LEO-15 Site, 2000 Ocean Sciences Meeting (January 24-28, 2000 - San Antonio, Texas)

M. A. Moline, C. Orrico, T. Newton, O. M. Schofield, J. J.Grzymski, T. Bergmann, S. Tozzi, Phytoplankton Community Dynamics in the Coastal Waters of the LEO-15 Site, 2000 Ocean Sciences Meeting (January 24-28, 2000 - San Antonio, Texas)

S. Tozzi, F. d'Ortenzio, R. Santoleri, M. Scardi: Comparison an validation of SeaWiFS data with Sicily Channel in situ measurement, Proceedings of XIII A.I.O.L. Congress (27-30 September 1998 - Ancona ITA)

S. Tozzi, R. Santoleri, S. Mattei, M. Ribera d'Alcalà and V. Barale: Chlorophyll a distribution in the Eastern Mediterranean in relation to sub-basin structures: analysis of the CZCS data, Proceedings of International Conferences Progress in Oceanography of the Mediterranean Sea (17-19 November 1997 - Rome ITA), 205-207

M. Marcelli, O. Campana, A. Di Maio, O.Mangoni, M. Ribera d'Alcalà, V. Saggiomo, S. Tozzi and E. Fresi: Development of a new operative method to estimate primary production in the pelagic system with a quasi synoptic space time scale, Proceedings of International Conferences Progress in Oceanography of the Mediterranean Sea (17-19 November 1997 - Rome ITA), 309-310

S. Tozzi, B. Buongiorno Nardelli and F. d'Ortenzio: Distribution of chlorophyll a in the Eastern Mediterranean in relation to sub-basin structures: analysis of the remotely sensed data, proceedings of XII A.I.O.L. Congress (18-21 September 1996 - Vulcano ITA), M. Piccazzo, 1997, vol. 1, 213-224
 

Hobbies and others Top

Sailing (2003-2007 on J/30 Salsa Verde)
Divemaster PADI, NaturalistDiver ISSD and DAN Oxygen First Aid for Scuba Diving Injuries
Cooking
Mandatory service at the library of Royal Palace in Naples from March 1998 to January 1999, as member of the organizer committee of the exhibition "The image of the Italian cities from the XV to XIX cent."