Osvaldo Ulloa, PhD.

Director @ IMO
Doctor in Oceanography @ DAL

Contact

oulloa@udec.cl
56-41-2661244
orcID

Roles

Director @ IMO
Associate Researcher @ IMO
Full Professor @ UDEC

Education

Doctor in Oceanography @ DAL

Biography

Dr. Osvaldo Ulloa (Chile, 1961) received his Master's (1987) and his PhD (1992) from Dalhousie University, Canada, working in phytoplankton ecology and marine bio-optics, respectively. His postdoctorate work was carried out at the Niels Böhr Institute of the University of Copengague, where he worked in the carbon cycle.

Dr. Ulloa returned to Chile in 1997 and joined the University of Concepcion, where he is currently a full Professor at the Department of Oceanography. He has trained undergraduate and graduate students in marine biology and oceanography. He has received several postdoctoral fellows, from Chile and abroad, in his lab. For over a decade, he has been one of the organizers and co-directors of the international course “Ecology and Diversity of Marine Microorganisms (ECODIM)” which has proven to be fundamental in the creation of a new generation of marine microbial ecologists in Latin America.

His most relevant scientific contributions have been in the area of biological oceanography, particularly in the study of the factors that determine the distribution patterns of phytoplankton and the microbial diversity and biogeochemistry of oxygen defficient marine environments.

Dr. Ulloa’s research focus at the Millennium Institute of Oceanography are microbial communities, including their diversity, their role in biogeochemical cycles and their genomic adaptations to oxygen defficiency and to depth.

Besides the development of his research lines, Dr. Ulloa participates in international working groups (e.g. SCOR) in his areas of expertise.

Students

Tutor of

Co-tutor of

Publications

Hydrography shapes amoA containing Thaumarcheota in the coastal waters off central Chile

Environmental Microbiology Reports

doi:10.1111/1758-2229.12579Wednesday, August 23, 2017

Bertagnolli, A.Ulloa, O.

Cryptic oxygen cycling in anoxic marine zones

Proceedings of the National Academy of Sciences of the United States of America

doi:10.1073/pnas.1619844114Monday, July 17, 2017

Garcia-Rebolledo, E.Padilla, C.Aldunate, M.Steward, F.Ulloa, O.Paulmier, A.Revsbech, N.

Diversity and Transcriptional Levels of RuBisCO Form II of Sulfur-Oxidizing γ-Proteobacteria in Coastal-Upwelling Waters with Seasonal Anoxia

Frontiers in Marine Science | Volume 4, Issue 213, Pages 1-12

doi:10.3389/fmars.2017.00213Tuesday, July 4, 2017

A review of protist grazing below the photic zone emphasizing studies of oxygen-depleted water columns and recent applications of in situ approaches

Frontiers in Marine Science | Volume 4

doi:10.3389/fmars.2017.00105Wednesday, April 26, 2017

Medina, L. E.Taylor, C. D.Pachiadaki, M. G.Henríquez, C.Ulloa, O.Edgcomb, V. P.

Vertical modeling of the nitrogen cycle in the eastern tropical South Pacific oxygen deficient zone using high-resolution concentration and isotope measurements

Global Biogeochemical Cycles | Volume 30, Issue 10, Pages 1661-1681

doi:10.1002/2016GB005415Thursday, November 10, 2016

Peters, B.Babbin, A.Lettmann, K.Mordy, C.Ulloa, O.Ward, B.Casciotti, K.

Ammonium and nitrite oxidation at nanomolar oxygen concentrations in oxygen minimum zone waters

Proceedings of the National Academy of Sciences of the United States of America | Volume 113, Issue 38, Pages 10601-10606

doi:10.1073/pnas.1600359113Tuesday, September 20, 2016

Bristow, L.A.Dalsgaard, T.Tiano, L.Mills, D.B.Bertagnolli, A.Wright, J.J.Hallam, S.J.Ulloa, O.Canfield, D.E.Revsbech, N.P.Thamdrup, B.

Genomic potential for nitrogen assimilation in uncultivated members of Prochlorococcus from an anoxic marine zone

ISME Journal | Volume 9, Pages 1264-1267

doi:10.1038/ismej.2015.21Tuesday, April 21, 2015

Astorga-Eló, M.Ramírez-Flandes, S.DeLong, E.F.Ulloa, O.

Structure of denitrifying communities reducing N2O at suboxic waters off northern Chile and Perú

Revista de Biología Marina y Oceanografía | Volume 50, Issue 1, Pages 95-110

doi:10.4067/S0718-19572015000100008Wednesday, April 1, 2015

Castro-González, M.Ulloa, O.Farías, L.

Oxygen at nanomolar levels reversibly suppresses process rates and gene expression in anammox and denitrification in the oxygen minimum zone off Northern Chile

mBio | Volume 5, Issue 6, Pages 1-14

doi:10.1128/mBio.01966-14Tuesday, October 28, 2014

Dalsgaard, T.Stewart, F.J.Thamdrup, B.De Brabandere, L.Revsbech, N.P.Ulloa, O.Canfield, D.E.DeLong, E.F.

Oxygen distribution and aerobic respiration in the north and south eastern tropical pacific oxygen minimum zones

Deep-Sea Research Part I-Oceanographic Research Papers | Volume 94, Pages 173-183

doi:10.1016/j.dsr.2014.10.001Tuesday, October 14, 2014

Tiano, L.García-Robledo, E.Dalsgaard, T.Devol, A.Ward, B.B.Ulloa, O.

Vertical partitioning of nitrogen-loss processes across the oxic-anoxic interface of an oceanic oxygen minimum zone

Environmental Microbiology | Volume 16, Issue 10, Pages 3014-3054

doi:10.1111/1462-2920.12255Monday, October 13, 2014

De Brabandere, L.Canfield, D.E.Dalsgaard, T.Friederich, G.E.Revsbech, N.P.Ulloa, O.Thamdrup, B.

Enhanced metabolic versatility of planktonic sulfur-oxidizing γ-proteobacteria in an oxygen-deficient coastal ecosystem

Frontiers in Marine Science | Volume 1, Issue 18, Pages 1-13

doi:10.3389/fmars.2014.00018Monday, July 7, 2014

The first report of a microdiverse anammox bacteria community in waters of Colombian Pacific, a transition area between prominent oxygen minimum zones of the eastern tropical Pacific

Environmental Microbiology Reports | Volume 6, Pages 595-604

doi:10.1111/1758-2229.12165Monday, May 12, 2014

Castro-González, M.Molina, V.Rodríguez-Rubio, E.Ulloa, O.
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Universidad de ConcepciónPontificia Universidad Católica de ChileMinisterio de Economía, Fomento y TurismoIniciativa Científica Milenio
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