OSVALDO ULLOAPicture Osvaldo Ulloa

 
        Professor of Oceanography
        Departamento de Oceanografía
        Director
        Laboratorio de Procesos Oceanográficos y Clima (PROFC)
        Universidad de Concepción
        Cabina 7 - Barrio Universitario
        Casilla 160-C
        Concepción 3
        Chile

          Tel: +56 41 220-3585
          Fax: +56 41 223-9900
          E-mail: oulloa@profc.udec.cl

RESEARCH INTERESTS

Primary production and phytoplankton ecology, marine optics and remote sensing of ocean colour, microbial oceanography, biogeochemical cycles and climate.

EDUCATION

- Ph.D. Dalhousie University (Oceanography), 1993.
- M.Sc. Dalhousie University (Marine Biology), 1987.
- Biólogo Marino. Universidad de Concepción, 1983.
- Licenciatura. Universidad de Concepción (Marine Biology), 1982.

PROFESSIONAL BACKGROUND

2006 - present:    Professor, Department of Oceanography, Universidad de Concepción, Chile.

2000 - 2006:       Associate Professor, Department of Oceanography, Universidad de Concepción, Chile.

1997 - present: Director of Program for Regional Studies in Physical Oceanography and Climate (PROFC), Universidad de Concepción, Chile.

1996 - 2000:        Visiting Professor, Universidad de Concepción, Chile.

1996 - 1997:   Associate Research Professor, Department of Geophysics, Niels Bohr Institute for Astronomy, Physics and Geophysics, University of Copenhagen, Denmark.

1995 - 1996:   Assistant Research Professor, Department of Geophysics, Niels Bohr Institute for Astronomy, Physics and Geophysics, University of Copenhagen, Denmark.

1994 - 1995:     Post-doctoral Fellow, Department of Geophysics, Niels Bohr Institute for Astronomy, Physics and Geophysics, University of Copenhagen, Denmark.

1993 - 1994:         Post-doctoral Fellow, Biological Oceanography Division, Bedford Institute of Oceanography, Canada.


PROFESSIONAL SERVICES

2006 - present :  Member  of  the SCOR working Group 128 on Natural and Human-Induced Hypoxia and Consequences for Coastal Areas.

2004 - present: Member of the Scientific Steering Committee, Surface Ocean-Lower Atmosphere Study (SOLAS).

1998 - 2001: Member of the International Ocean Colour Coordinating Group (IOCCG).

1998 - 2000: Member of the Coastal Pannel, Global Ocean Observing  System (GOOS).


AWARDS AND HONORS

Investigator of the Science Frontiers Program (2004-2006), Chilean Academy of Science.

POST-DOCTORAL FELLOWS

Dr. Laurent Dezileau (2001-2003).

Dr. Heike Stevens (2004-2007).

Dr. Heather Bouman (2005-2007).

Dr. Verónica Molina (in progress).


GRADUATE STUDENTS

Ricardo De Pol-Holtz (Ph.D., U. de Concepción, 2006).

Carolina Grob (Ph.D., U. de Concepción, 2007).

Gabriel Yuras (Ph.D., U. de Concepción, in progress), Paris Lavín (Ph.D., U. de Concepción, in progress), Alexander Galán, (Ph.D., U. de Concepción, in progress),  Lucy Belmar (Ph.D., U de Concepción, in progress).


PUBLICATIONS

Zwirglmaier, K., L. Jardillier, M. Ostrowski, S. Mazard, L. Garczarek, D. Vaulot, F. Not, R. Massana, O. Ulloa & D. J. Scanlan. Global phylogeography of marine Synechococcus and Prochlorococcus reveals a distinct partitioning of lineages amongst oceanic biomes. Environmental Microbiology (in press).

Grob, C., O. Ullloa, H. Claustre, Y. Huot, G. Alarcón & D. Marie. Contribution of picoplankton to the total particulate organic carbon concentration in the eastern South Pacific (207). Biogeosciences, 4: 837-842.

Lami, R., M. T. Cottrell, H. Claustre, O. Ulloa, I. Obernosterer, D. L. Kirchman & P. Lebaron (2007). High abundances of aerobic anoxygenic photosynthetic bacteria in the South Pacific Ocean. Applied and Environmental Microbiology, 73: 4198-4205.

Molina, V., O. Ulloa, L. Farías, H. Urrutia, S. Ramírez, P. Junier & K.-P. Witzel (2007). Ammonia-oxidizing ß-proteobacteria from the oxygen minimum zone off northern Chile. Applied and Environmental Microbiology, 73: 35-47-3555.

De Pol-Holz, R., O. Ulloa, F. Lamy, L. Dezileau, P. Sabatier & D. Hebbeln. Late Quaternary variability of sedimentary nitrogen isotopes in the eastern South Pacific Ocean. Paleoceanography,  22: PA2207, doi:10.1029/2006PA001308.

Grob, C., O. Ulloa, W. K. W. Li, G. Alarcón, M. Fukasawa & S. Watanabe (2007). Picoplankton abundance and biomass across the eastern South Pacific Ocean along 32.5° S. Marine Ecology Progress Series, 332, 53-62.

Thamdrup, B., T. Dalsgaard, M. M. Jensen, O. Ulloa, L. Farías & R. Escribano (2006). Anaerobic ammonium oxidation in the oxygen-deficient waters off northern Chile. Limnology and Oceanography, 51, 2145-2156, 2006.

Bouman, H. A.,  O. Ulloa, D. J. Scanlan, K. Zwirglmaier, W. K. W. Li, T. Platt, V. Stuart, R. Barlow, O. Leth, L. Clementson, V. Lutz, M. Fukasawa, S. Watanabe & S. Sathyendranath (2006). Oceanographic basis of the global surface distribution of Prochlorococcus ecotypes. Science, 312: 918-921.

De Pol-Holz, R., O. Ulloa, L. Dezileau, J. Kaiser, F. Lamy & D. Hebbeln (2006). Melting of the Patagonian Ice Sheet and deglacial perturbations of the nitrogen cycle in the eastern South Pacific. Geophysical Research Letters, 33, L04704, doi:10.1029/2005GL024477.

Devred, E., S. Sathyendranath, V. Stuart, H. Maass, O. Ulloa & T. Platt (2006). A two-component model of phytoplankton absorption in the open ocean: Theory and applications. Journal of Geophysical Research 111, C03011,doi:10.1029/2005JC002880.

Sathyendranath, S., V. Stuart, T. Platt, H. Bouman, O. Ulloa & H. Maass (2005). Remote sensing of ocean colour: Towards algorithms for retrieval of pigment composition. Indian Journal of Marine Sciences, 34: 333-340.

Yuras, G., O. Ulloa & S. Hormazábal (2005). On the annual cycle of coastal and oceanic satellite chlorophyll off Chile (18° - 40°S). Geophysical Research Letters 32, L23604, doi:10.1029/2005GL023946.

Castro-González, M., G. Braker, L. Farías & O. Ulloa (2005). Communities of nirS-type denitrifiers in the water column of the oxygen minimum zone in the eastern South Pacific. Environmental Microbiology, 7: 1298-1306.

Farías, L., M. Graco & O. Ulloa (2004). Temporal variability of nitrogen cycling in continental-shelf sediments of the upwelling ecosystem off central Chile. Deep-Sea Research II, 51: 2491-2505.

Escribano, R., G. Daneri, L. Farías, V. A. Gallardo, H. E. González, D. Gutiérrez, C. B. Lange, C. E. Morales, O. Pizarro, O. Ulloa & M. Braun (2004). Biological and chemical consequences of the 1997-1998 El Niño in the Chilean coastal upwelling system: A synthesis. Deep-Sea Research II, 51: 2389-2411.

Leth, O., G. Shaffer & O. Ulloa (2004). Hydrography of the eastern South Pacific Ocean: Results from the Sonne 102 cruise, May-June 1995. Deep-Sea Research II, 51: 2349-2369.

Dezileau, L. O. Ulloa, D. Hebbeln, F. Lamy, J.-L. Reyss & M. Fontugne (2004). Iron control of past productivity in the coastal upwelling system off the Atacama Desert. Paleoceanography, 19, PA3012, doi:10.1029/2004PA001006.

Stuart, V., O. Ulloa, G. Alarcón, S. Sathyendranath, H. Major, E. J. H. Head & T. Platt (2004). Bio-optical characteristics of phytoplankton populations in the upwelling system off the coast of Chile. Revista Chilena de Historia Natural, 77: 87-105.

Bouman H. A., T. Platt, S. Sathyendranath, W. K. W.  Li, V. Stuart, C. Fuentes-Yaco, H. Maass, E. P. W. Horne, O. Ulloa, V. Lutz & M. Kyewalyanga (2003). Temperature as an indicator of optical properties and community structure of marine phytoplankton: implications for remote sensing. Marine Ecology Progress Series, 258: 19-30.

Platt T., S. Sathyendranath, A. M. Edwards, D. S. Broomhead & O. Ulloa (2003). Nitrate supply and demand in the mixed layer of the ocean. Marine Ecology Progress Series, 254: 3-9.

Hormazabal, S., G. Shaffer, J. Letelier & O. Ulloa (2001). Local and remote forcing of sea surface temperature in the coastal upwelling system off Chile. Journal of Geophysical Research, 106:16657-16672.

Ulloa, O., R. Escribano, S. Hormazabal, R. A. Quiñones, R. R. González & M. Ramos (2001). Evolution and biological effects of the 1997-98 El Niño in the upwelling ecosystem off northern Chile. Geophysical Research Letters, 28: 1591-1594.

Daneri, G., V. Dellarossa, R. Quiñones, B. Jacob, P. Montero & O. Ulloa (2000). Primary production and community respiration in the Humboldt Current System off Chile and associated oceanic areas. Marine Ecology Progress Series, 197: 41-49.

Shaffer, G., O. Leth, O. Ulloa, J. Bendtsen, G. Daneri, V. Dellarossa, S. Hormazabal & P.-I. Sehlstedt (2000). Warming and circulation change in the eastern South Pacific Ocean. Geophysical Research Letters, 27: 1247-1250.

Shaffer, G., J. Bendtsen & O. Ulloa (1999). Fractionation during remineralization of organic matter in the ocean. Deep-Sea Research, 46: 185-204.

Fossing, H., V. A. Gallardo, B. B. Jørgensen, M. Hüttel, L. P. Nielsen, H. Schulz, D. E. Canfield, S. Foster, R. N. Glud, J. K. Gundersen, J. Küver, N. B. Ramsing, A. Teske, B. Thamdrup & O. Ulloa. (1995). Concentration and transport of nitrate by the mat-forming sulphur bacterium Thioploca. Nature, 374: 713-715.

Ulloa, O., S. Sathyendranath & T. Platt (1994). Effect of the particle-size distribution on the backscattering ratio in seawater. Applied Optics, 30: 7070-7077.

Partensky, F., N. Hoepffner, W. K. W. Li, O. Ulloa & D. Vaulot (1993). Photo-acclimation of Prochlorococcus sp. (Prochlorophyta) strains isolated from the North Atlantic and the Mediterranean Sea. Plant Physiology, 101: 285-296.

Ulloa, O., S. Sathyendranath, T. Platt & R. A. Quiñones (1992). Light scattering by marine heterotrophic bacteria. Journal of Geophysical Research, 97: 9619-9629.

Platt, T., S. Sathyendranath, O. Ulloa, W. G. Harrison, N. Hoepffner & J. Goes (1992). Nutrient control of phytoplankton photosynthesis in the Western North Atlantic. Nature, 356: 229-231.

Sathyendranath, S., T. Platt, E. P.W. Horne, W. G. Harrison, O. Ulloa, R. Outerbridge & N. Hoepffner (1991). Estimation of new production in the ocean by compound remote sensing. Nature, 353: 129-133.

Lewis, M. R., O. Ulloa & T. Platt (1988). Photosynthetic action, absorption, and quantum yield spectra for a natural population of Oscillatoria in the North Atlantic. Limnology and Oceanography, 33: 92-98.



OTHER PUBLICATIONS

Dogliotti, A. I., O. Ulloa, F. Müller-Karger, C. Hu, B. Murch, C. Taylor, G. Yuras, M. Kampel, V. Lutz, S. Gaeta, D. A. Gagliardini, C. A. E. Garcia, E. Klein, W. Helbling, R. Varela, E. Barbieri, R. Negri, R. Frouin, S. Sathyendranath & T. Platt (2005). The ANTARES observation network. Proceedings of SPIE, 5885, 58850N.

Ulloa, O. & R. De Pol (2004). Zonas de Mínimo de Oxígeno. In: C. Werlinger, editor, Biología Marina y Oceanografía: Conceptos y Procesos, pp. 521-532. Consejo Nacional del Libro y la Lectura-Universidad de Concepción, Trama Impresores S.A., Concepción, Chile.

Lange C. & O. Ulloa (2003). Center for oceanographic research opens in Chile. Eos, 84: 61-62.

Dellarossa, V., G. Daneri, R. Quiñones O. Ulloa & A. Vasquez (2001). Producción primaria y biomasa fraccionada por tamaño en sistemas acuáticos de distinto grado trófico. En: K. Alveal & T. Antezana, editores, Sustentabilidad de la Biodiversidad, un Problema Actual. Bases Científico-Técnicas, Teorizaciones y Proyecciones, pp. 183-198. Universidad de Concepción, Concepción, Chile.

Ulloa, O., N. Hoepffner & D. Larkin (1997). Depth and wavelength dependence of phytoplankton photosynthesis: implications for the remote sensing of marine primary production. In: S. G. Ackeleson & R. Frouin, editors, Ocean Optics XIII, Proc. SPIE 2963, pp. 284-289.

Ulloa, O., T. Platt & S. Sathyendranath (1995). Determinación de la producción primaria mediante información satelital. In: K. Alveal, M. E. Ferrario, E. C. Oliveira, & E. Sar, editors, Manual de Métodos Ficológicos, pp. 375-384. Universidad de Concepción, Concepción, Chile.

Ulloa, O., T. Platt & S. Sathyendranath (1989). Percepción remota en oceanografía biológica: estimación de la productividad primaria. Actas del IV Simposio Latinoamericano en Percepción Remota, 2: 832-840.

Legget, W. C., W. R. Boynton, V. F. Galluci, L. Johnson, R. Margalef, J. McGlade, D. Mikulecky, R. Rosen, R. O. Ulloa & J. Watson (1985). Hypothesis testing and sampling design in exploited ecosystems. Canadian Bulletin of Fisheries and Aquatic Sciences, 213: 237-240.