The University of British Columbia

37. Steiner N.S., M. Robert, M. Arychuk, M.L. Levasseur, A. Merzouk., M.A. Peña, W.A. Richardson, P.D. Tortell.  Evaluating DMS measurements and model results in the Northeast subarctic Pacific from 1996-2010.  Biogeochemistry (in press)

36. 2. Asher E.C., J.W.H. Dacey, M.M. Mills, K.R.Arrigo and P.D. Tortell.  High concentrations and turnover rates of DMS, DMSP and DMSO in Antarctic Sea Ice.  Geophysical Research Letters  (in press)

35. M. Long, R. Dunbar, P.D. Tortell, W. Smith, Jr., D. Mucciarone, and G.R. DiTullio.  Vertical structure, seasonal drawdown, and net community production in the Ross Sea, Antarctica.  Journal of Geophysical Research – Oceans, 116, C10029, doi:10.1029/2009JC005954.

34. E.C. Asher, A. Merzouk and P.D. Tortell 2011, Fine-scale spatial and temporal variability of surface water dimethylsufide (DMS) concentrations and sea–air fluxes in the NE Subarctic Pacific.  Marine Chemistry, 126 63-75.

33. Tortell, P.D., Guéguen, C., Long, M.C., Payne, C.D., Lee, P., DiTullio, G.R., 2011. Spatial variability and temporal dynamics of surface water pCO2, DO2 /Ar and dimethylsulfide in the Ross Sea, Antarctica. Deep Sea Research Part I: Oceanographic Research Papers 58 (3), 241-259.

32.  Masotti, I., S. Belviso, S. Alvain, J.E. Johnson, T.S. Bates, P.D. Tortell, N. Kasamatsu, M. Mongin, C.A. Marandino, E.S. Saltzman and C. Moulin.  Spatial and temporal variability of the dimethylsulfide to chlorophyll ratio in the surface ocean: An assessment in the light of phytoplankton composition determined from space.  Biogeosciences, 7(10), 3215-3237.

31. F. Ribalet, A. Marchetti, K. Hubbard, K. Brown, C. Durkin, R. Morales, M. Robert, J. Swalwell, P.D. Tortell, and G. Armbrust. 2010. Unveiling a phytoplankton hotspot at a narrow boundary between coastal and offshore waters.  Proceedings of the National Academy of Sciences, doi: 10.1073/pnas.1005638107

30. Tortell PD, Trimborn S, Li Y, Rost B and Payne CD. 2010.  Inorganic carbon utilization by Ross Sea phytoplankton across natural and experimental CO2 gradients.  Journal of Phycology, 46: 433-443

29. Granger J, Sigman DM, Rohde MM, Maldonado MT, Tortell PD.  2010. N and O isotope effects during nitrate assimilation by unicellular prokaryotic and eukaryotic plankton cultures. Geochimica Et Cosmochimica Acta 74:1030-1040

28. Zaikova E, Walsh DA, Stilwell CP, Mohn WW, Tortell PD, Hallam SJ. 2010. Microbial community dynamics in a seasonally anoxic fjord: Saanich Inlet, British Columbia. Environmental Microbiology 12:172-191

27. Ridgwell A, Schmidt DN, Turley C, Brownlee C, Maldonado MT, Tortell PD, Young JR.  2009. From laboratory manipulations to Earth system models: scaling calcification impacts of ocean acidification. Biogeosciences 6:2611-2623

26. Walsh DA, Zaikova E, Howes CG, Song YC, Wright JJ, Tringe SG, Tortell PD, Hallam SJ. 2009. Metagenome of a Versatile Chemolithoautotroph from Expanding Oceanic Dead Zones. Science 326:578-582

25. Tortell PD, Long MC.  2009. Spatial and temporal variability of biogenic gases during the Southern Ocean spring bloom. Geophysical Research Letters 36 L01603, doi: 10.1029/2008GL035819

24. Granger, J., D.M. Sigman, M.F. Lehmann, and P.D. Tortell. 2008.  Nitrogen and oxygen isotope fractionation during dissimilatory nitrate reduction by denitrifying bacteria. Limnology and Oceanography 53(6) 2533-2545.

23. Nemçek, N., D. Ianson, and P.D. Tortell. 2008. A high-resolution survey of DMS, CO₂ and O₂/Ar distributions in productive coastal waters. Global Biogeochemical Cycles, 22 (2): doi 10.1029/2006GB002879

22. Tortell, P.D., C.D. Payne, C. Gueguen, R.F. Strzepek, P.W. Boyd, and B. Rost. 2008. Inorganic carbon uptake by Southern Ocean phytoplankton.  Limnology and Oceanography, 53 (4): 1266-1278

21. Tortell, P. D. C.D. Payne, Y. Li, S. Trimborn, B. Rost, W.O. Smith, C. R. Riesselman, R.B. Dunbar, P. Sedwick, and G.R. DiTullio. 2008. CO₂ sensitivity of Southern Ocean phytoplankton. Geophysical Research Letters 35 (4) doi 10.1029/2007GL032583. (Featured article / Editor’s highlight)

20. Martin, C. L., and P. D. Tortell. 2008. Bicarbonate transport and extracellular carbonic anhydrase in marine diatoms. Physiologia Plantarum 133: 106-116.

19. Gueguen, C., and P. D. Tortell. 2008. High-resolution measurement of Southern Ocean CO₂ and O₂/Ar by membrane inlet mass spectrometry. Marine Chemistry 108: 184-194.

18. Rost, B., S. A. Kranz, K. U. Richter, and P. D. Tortell. 2007. Isotope disequilibrium and mass spectrometric studies of inorganic carbon acquisition by phytoplankton. Limnology and Oceanography-Methods 5: 328-337.

17. Whitney, F.A., and P.D. Tortell, 2006. Fifty Years of Ocean Observations in the Pacific Northeast.  EOS, Transactions American Geophysical Union 89: (47) doi:10.1029/2006EO490005

16. Tortell, P. D., C. L. Martin, and M. E. Corkum. 2006. Inorganic carbon uptake and intracellular assimilation by subarctic Pacific phytoplankton assemblages. Limnology and Oceanography 51: 2102-2110.  (Featured article / Editor’s highlight)

15. Martin, C. L., and P. D. Tortell. 2006. Bicarbonate transport and extracellular carbonic anhydrase activity in Bering Sea phytoplankton assemblages: Results from isotope disequilibrium experiments. Limnology and Oceanography 51: 2111-2121.  (Featured article / Editor’s highlight)

14. Granger, J., D. M. Sigman, M. G. Prokopenko, M. F. Lehmann, and P. D. Tortell. 2006. A method for nitrite removal in nitrate N and O isotope analyses. Limnology and Oceanography-Methods 4: 205-212.

13. Tortell, P. D. 2005. Dissolved gas measurements in oceanic waters made by membrane inlet mass spectrometry. Limnology and Oceanography-Methods 3: 24-37.

12. Tortell, P. D. 2005. Small-scale heterogeneity of dissolved gas concentrations in marine continental shelf waters. Geochemistry Geophysics Geosystems 6.

11. Tortell, P. D., and F. M. M. Morel. 2002. Sources of inorganic carbon for phytoplankton in the eastern Subtropical and Equatorial Pacific Ocean. Limnology and Oceanography 47: 1012-1022.

10. Tortell, P. D., G. R. Ditullio, D. M. Sigman, and F. M. M. Morel. 2002. CO2 effects on taxonomic composition and nutrient utilization in an Equatorial Pacific phytoplankton assemblage. Marine Ecology-Progress Series 236: 37-43.

9. Morel, F. M. M, E.H Cox, A.M.L Kraepiel, T.W. Lane, A.J. Milligan, I. Schaperdoth, J.R. Reinfelder, and P.D. Tortell. 2002. Acquisition of inorganic carbon by the marine diatom Thalassiosira weissflogii. Functional Plant Biology 29: 301-308.

8. Lam, P. J., P. D. Tortell, and F. M. M. Morell. 2001. Differential effects of iron additions on organic and inorganic carbon production by phytoplankton. Limnology and Oceanography 46: 1199-1202.

7. Tortell, P. D., G. H. Rau, and F. M. M. Morel. 2000. Inorganic carbon acquisition in coastal Pacific phytoplankton communities. Limnology and Oceanography 45: 1485-1500.

6. Tortell, P. D. 2000. Evolutionary and ecological perspectives on carbon acquisition in phytoplankton. Limnology and Oceanography 45: 744-750.

5. Riebesell, U., I. Zondervan, B. Rost, P. D. Tortell, R. E. Zeebe, and F. M. M. Morel. 2000. Reduced calcification of marine plankton in response to increased atmospheric CO₂. Nature 407: 364-367.

4. Tortell, P. D., M. T. Maldonado, J. Granger, and N. M. Price. 1999. Marine bacteria and biogeochemical cycling of iron in the oceans. FEMS Microbiology Ecology 29: 1-11.

3. Tortell, P. D., J. R. Reinfelder, and F. M. M. Morel. 1997. Active uptake of bicarbonate by diatoms. Nature 390: 243-244.

2. Tortell, P. D., M. T. Maldonado, and N. M. Price. 1996. The role of heterotrophic bacteria in iron-limited ocean ecosystems. Nature 383: 330-332.

1. Tortell, P. D., and N. M. Price. 1996. Cadmium toxicity and zinc limitation in centric diatoms of the genus Thalassiosira. Marine Ecology-Progress Series 138: 245-254.