Shaffer, G., J. Bendsen & O. Ulloa. Fractionation during remineralization of organic matter in the ocean. Deep-Sea Research I, 46, 185-204, 1999
Daneri, G., V. Dellarossa, R.A. Quiñones, B. Jacob, P. Montero & O. Ulloa. Primary production and community respiration in the Humboldt Current System off Chile and associated oceanic areas. Marine Ecology Progress Series, 197, 41-49, 2000
Hormazabal, S., Shaffer, G., J. Letelier & O. Ulloa.. Local and remote forcing of sea surface temperature in the coastal upwelling system off Chile. Journal of Geophysical Research, 106, 16657-16672, 2001
Ulloa, O., R. Escribano, S. Hormazabal, R.A. Quiñones, R.R. González & M. Ramos. Evolution and biological effects of the 1997-98 El Niño in the upwelling ecosystem off northern Chile. Geophysical Research Letters, 28, 1591-1594, 2001
Bouman, H. A., T. Platt, S. Sathyendranath, W. Li, V. Stuart, C. Fuentes-Yaco, H. Maass, E. Horne, O. Ulloa V. Lutz & M. Kyewalyanga.. Temperature as indicator of optical properties and community structure of marine phytoplankton: implications for remote sensing.. Marine Ecology Progress Series, 258, 19-30, 2003
Lange, C., O. Ulloa.. Center for oceanographic research opens in Chile. EOS, 7, 61:62, 2003
Platt, T., S. Sathyendranath, A. Edwards, D. Broomhead, O. Ulloa. Nitrate supply and demand in the mixed layer of the ocean. Marine Ecology Progress Series, 254, 3-9, 2003
Dezileau, L., O. Ulloa, D. Hebbeln, F. Lamy, J. J. Reyss & M. Fontugne. Iron control of past productivity in the coastal upwelling system off the Atacama Desert. Paleoceanography, 19, PA3012, doi:10.1029/2004PA001006, 2004
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. Biological and chemical consequences of the 1997-1998 El Nino in the Chilean coastal upwelling system: A synthesis. Deep-Sea Research II, 51, 2389-2411, 2004
Farías, L., M. Graco and O. Ulloa.. Nitrogen cycling in continental shelf sediments of the upwelling ecosystem off central Chile. Deep-Sea Research II, 51, 2491-2505, 2004
Leth, O., G. Shaffer & O. Ulloa. Hydrography of the eastern South Pacific Ocean: Results from the Sonne 102 cruise, May-June 1995. Deep-Sea Research II, 52, 2349-2369, 2004
Stuart, V., O. Ulloa, G. Alarcón, S. Sathyendranath, H. Major, E. J. H. Head & T. Platt.. Bio-optical characteristics of phytoplankton populations in the upwelling system off the coast of Chile. Revista Chilena de Historia Natural, 77, 87-105, 2004
Castro-González, M., G. Braker, L. Farías & O. Ulloa. Communities of nirS-type denitrifiers in the water column of the oxygen minimum zone in the eastern South Pacific. Environmental Microbiology, 7, 1298-1306, 2005
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. The ANTARES observation network. Proceedings of SPIE, 5885, 2005
Sathyendranath, S., V. Stuart, T. Platt, H. Bouman, O. Ulloa & H. Maass. Remote sensing of ocean colour: Towards algorithms for retrieval of pigment composition. Indian Journal of Marine Sciences, 34, 333-340, 2005
Yuras, G., O. Ulloa, & S. Hormazábal. On the annual cycle of coastal and open ocean satellite chlorophyll off Chile (18° - 40° S). Geophysical Research Letters, 32, 1029-1033, 2005
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. Oceanographic basis of the global surface distribution of Prochlorococcus ecotypes. Science, 312, 918-921, 2006
De Pol-Holz, R., O. Ulloa, L. Dezileau, J. Kaiser, F. Lamy & D. Hebbeln. 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., 2006
Devred, E., S. Sathyendranath, V. Stuart, H. Maass, O. Ulloa, & T. Platt. A two-component model of phytoplankton absorption in the open ocean: Theory and applications. Journal of Geophysical Research, 111, C03011,doi:10.1029/2005JC002880, 2006
Thamdrup, B., T. Dalsgaard, M. M. Jensen, O. Ulloa, L. Farías & R. Escribano. Anaerobic ammonium oxidation in the oxygen-deficient waters off northern Chile. Limnology and Oceanography, 51, 2145-2156, 2006
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, 2007
Grob, C., O. Ulloa, W. K. W. Li, G. Alarcón, M. Fukasawa & S. Watanabe. Picoplankton abundance and biomass across the eastern South Pacific Ocean along latitude 32.5° S. Marine Ecology Progress Series, 332, 53-62, 2007
Grob, C., O. Ulloa, H. Claustre, Y. Huot, G. Alarcón & D. Marie. Contribution of picoplankton to the total particulate organic carbon concentration in the eastern South Pacific. Biogeosciences, 4, 837-842, 2007
Lami, R., M. T. Cottrell, J. Ras, O. Ulloa, I. Obernosterer, H. Claustre, D. L. Kirchman & P. Lebaron. High abundances of aerobic anoxygenic photosynthetic bacteria in the South Pacific Ocean. Applied and Environmental Microbiology, 73, 4198-4205, 2007
Molina, V., O. Ulloa, L. Farías, H. Urrutia, S. Ramírez, P. Junier & K.-P. Witzel. Ammonia-oxidizing beta-proteobacteria from the oxygen minimum zone off northern Chile. Applied and Environmental Microbiology, 73, 3547-3555, 2007
Duce, R. A., J. LaRoche, K. Altieri, K. R. Arrigo, A. R. Baker, D. G. Capone, S. Cornell, F. Dentener, J. Galloway, R. S. Ganeshram, R. J. Geider, T. Jickells, M. M. Kuypers, R. Langlois, P. S. Liss, S. M. Liu, J. J. Middelburg, C. M. Moore, S. Nickovic, A. Oschlies, T. Pedersen, J. Prospero, R. Schlitzer, S. Seitzinger, L. L. Sorensen, M. Uematsu, O. Ulloa, M. Voss, B. Ward & L. Zamora. Impacts of atmospheric anthropogenic nitrogen on the open ocean. Science, 320, 893-897, 2008
Friederich, G. E., J. Ledesma, O. Ulloa & F. P. Chavez. Air-sea carbon dioxide fluxes in the coastal southeastern tropical Pacific. Progress in Oceanography, 79, 156-166, 2008
Lavín, P., P. Gómez, B. González & O. Ulloa. Diversity of the marine picocyanobacteria Prochlorococcus and Synechococcus assessed by terminal restriction fragment length polymorphisms of 16S-23S ribosomal DNA internal transcribed spacer sequences. Revista Chilena de Historia Natural, 81, 515-531, 2008
Ramírez-Flandes, S., & O. Ulloa. Bosque: integrated phylogentic analysis software. Bioinformatics, 24, 2539-2541, 2008
Stevens, H., & O. Ulloa. Bacterial diversity in the oxygen minimum zone of the eastern tropical South Pacific. Environmental Microbiology, 10, 1244-1259, 2008
Van Wambeke, F., S. Bonnet, T. Moutin, P. Raimbault, G. Alarcón & C. Guieu. Factors limiting heterotrophic bacterial production in the southern Pacific Ocean. Biogeosciences, 5, 833-845, 2008
Van Wambeke, F., I. Obernosterer, T. Moutin, S. Duhamel, O. Ulloa & H. Claustre. Heterotrophic bacterial production in the eastern South Pacific: longitudinal trends and coupling with primary production. Biogeosciences, 5, 157-169, 2008
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, 10, 147-161, 2008
De Pol-Holz, R., R. S. Robinson, D. Hebbeln, D. M. Sigman & O. Ulloa. Controls on sedimentary nitrogen isotopes along the Chile margin. Deep-Sea Research II, 56, 1042-1054, 2009
Galán, A., V. Molina, B. Thamdrup, D. Woebken, G. Lavik, M. M. M. Kuypers & O. Ulloa. Anammox bacteria and the anaerobic oxidation of ammonium in the oxygen minimum zone off northern Chile. Deep-Sea Research II, 56, 1021-1031, 2009
Revsbech. N. P., L. H. Larsen, J. Gundersen, T. Dalsgaard, O. Ulloa & B. Thamdrup. Determination of ultra-low oxygen concentrations in oxygen minimum zones by the STOX sensor. Limnology and Oceanography: Methods, 7, 371-381, 2009
Ulloa, O., & S. Pantoja. The oxygen minimum zone of the eastern South Pacific. Deep-Sea Research II, 56, 987-991, 2009
Whitmire, A. L., R. M. Letelier, V. Villagrán & O. Ulloa. Autonomous observations of in vivo fluorescence and particle backscattering in an oceanic oxygen minimum zone. Optics Express, 17, 21992-22004, 2009
Canfield, D. E., F. J. Stewart, B. Thamdrup, L. De Brabandere, T. Dalsgaard, E. F. DeLong, N. P. Revsbech & O. Ulloa. A cryptic sulfur cycle in oxygen-minimum zone waters off the Chilean coast. Science, 330, 1375-1378, 2010
Lavin, P., B. González, J. F. Santibañez, D. J. Scanlan & O. Ulloa. Novel lineages of Prochlorococcus thrive within the oxygen minimum zone of the eastern tropical South Pacific. Environmental Microbiology Reports, 2, 728-738, 2010
Molina, V., L. Belmar & O.Ulloa. High diversity of ammonia-oxidizing archaea in permanent and seasonal oxygen-deficient waters of the eastern South Pacific. Environmental Microbiology, 12, 2450-2465, 2010
Zhang, J., D. Gilbert, A. J. Gooday, L. Levin, S. W. A. Naqvi, J. J. Middelburg, M. Scranton, W. Ekau, A. Peña, B. Dewitte, T. Oguz, P. M. S. Monteiro, E. Urban, N. N. Rabalais, V. Ittekkot, W. M. Kemp, O. Ulloa, R. Elmgren, E. Escobar-Briones & A. K. Van der Plas. Natural and human-induced hypoxia and consequences for coastal areas: synthesis and future development. Biogeosciences, 7, 1443-1467., 2010
Belmar, L., V. Molina & O. Ulloa. Abundance and phylogenetic identity of archaeoplankton in the permanent oxygen minimum zone of the eastern tropical South Pacific. FEMS Microbiology Ecology, 78, 314-326, 2011
Bouman, H. A., O. Ulloa, R. Barlow, W. K. W. Li, T. Platt, K. Zwirglmaier, D. J. Scanlan & S. Sathyendranath. Water-column stratification governs the community structure of subtropical marine picophytoplankton. Environmental Microbiology Reports, 3, 473-482, 2011
Collado-Fabbri, S., D. Vaulot & O. Ulloa. Structure and seasonal dynamics of the eukaryotic picophytoplankton community in a wind-driven coastal upwelling ecosystem. Limnology and Oceanography, 56, 2334-2346, 2011
Fernandez, C., L. Farías & O. Ulloa. Nitrogen fixation in marine denitrfied waters. PLoS One, 6, e20539, doi:10.1371/journal.pone.0020539, 2011
Lucy Belmar, Belmar, L.,Molina, V.,Ulloa, O. Abundance and phylogenetic identity of archaeoplankton in the permanent oxygen minimum zone of the eastern tropical South Pacific. FEMS Microbiology Ecology, 278, 2011
Galan, A., Molina, V.,Belmar, L.,Ulloa, O.. Temporal variability and phylogenetic characterization of planktonic anammox bacteria in the coastal upwelling ecosystem off central Chile.. Progress in Oceanography, 92, 2012
Stewart, F. J., O. Ulloa & E. F. DeLong. Microbial metatranscriptomics in a permanent marine oxygen minimum zone. Environmental Microbiology, 14, 23-40, 2012
Stewart, F. J., T. Dalsgaard, C. R. Young, B. Thamdrup, N. P. Revsbech, O. Ulloa, D. E. Canfield & E. F. DeLong. Experimental incubations elicit profound changes in community transcription in OMZ bacterioplankton. PLoS One, 7, e37118, 2012
Bouman, H. A., C. Lepère, c, D. J. Scanlan & O. Ulloa. Phytoplankton community structure in a high-nutrient, low-chlorophyll region of the eastern Pacific Subantarctic region during winter-mixed and summer-stratified conditions. Deep-Sea Research I, (in press)., 2012
Vaulot, D., C. Lepère, E. Toulza, R. De la Iglesia, J. Poulain, F. Gaboyer, H. Moreau, K. Vandepoele, O. Ulloa, F. Gavory & G. Piganeau. Metagenomes of the picoalga Bathycoccus from the Chile coastal upwelling. PLoS One, (in press)., 2012