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Osvaldo Iván Ulloa Quijada

Profesor Titular

UNIVERSIDAD DE CONCEPCIÓN

Concepción, Chile

Líneas de Investigación


Oceanografía Microbiana; Bio-óptica Marina; Ciclos Biogeoquimicos Marinos

Educación

  •  Ph.D., Dalhousie University. Canada, 1993
  •  M.Sc., Dalhousie University. Chile, 1997
  •  Biólogo Marino, Universidad de Concepción. Chile, 1983

 

Article (79)

Potential virus-mediated nitrogen cycling in oxygen-depleted oceanic waters
The cyanobacterium Prochlorococcus has divergent light-harvesting antennae and may have evolved in a low-oxygen ocean
Autotrophic carbon fixation pathways along the redox gradient in oxygen-depleted oceanic waters
Distinct oxygen environments shape picoeukaryote assemblages thriving oxygen minimum zone waters off central Chile
Genetic diversity and novel lineages in the cosmopolitan copepod Pleuromamma abdominalis in the Southeast Pacific
Nitrogen assimilation in picocyanobacteria inhabiting the oxygen-deficient waters of the eastern tropical North and South Pacific
Spatiotemporal Distribution of Key Pelagic Microbes in a Seasonal Oxygen-Deficient Coastal Upwelling System of the Eastern South Pacific Ocean
The Influence of pCO(2)-Driven Ocean Acidification on Open Ocean Bacterial Communities during A Short-Term Microcosm Experiment in the Eastern Tropical South Pacific (ETSP) off Northern Chile
Redox traits characterize the organization of global microbial communities
Sampling and Processing Methods Impact Microbial Community Structure and Potential Activity in a Seasonally Anoxic Fjord: Saanich Inlet, British Columbia
Decrypting the sulfur cycle in oceanic oxygen minimum zones.
Distinctive Archaeal Composition of an Artisanal Crystallizer Pond and Functional Insights Into Salt-Saturated Hypersaline Environment Adaptation
Metabolic potential and in situ transcriptomic profiles of previously uncharacterized key microbial groups involved in coupled carbon, nitrogen and sulfur cycling in anoxic marine zones
Single cell genomic and transcriptomic evidence for the use of alternative nitrogen substrates by anammox bacteria.
A review of protist grazing below the photic zone emphasizing studies of oxygen-depleted water columns and recent applications of in situ approaches
Cryptic oxygen cycling in anoxic marine zones.
Diversity and transcriptional levels of RuBisCO form II of sulfur-oxidizing γ-proteobacteria in coastal-upwelling waters with seasonal anoxia
Hydrography shapes amoA containing Thaumarcheota in the coastal waters off central Chile.
Ammonium and nitrite oxidation at nanomolar oxygen concentrations in oxygen minimum zone waters.
Vertical modeling of the nitrogen cycle in the eastern tropical South Pacific oxygen deficient zone using high-resolution concentration and isotope measurements
Genomic potential for nitrogen assimilation in uncultivated members of Prochlorococcus from an anoxic marine zone
Structure of denitrifying communities reducing N2O at suboxic waters off northern Chile and Perú
Enhanced metabolic versatility of planktonic sulfur-oxidizing γ-proteobacteria in an oxygen-deficient coastal ecosystem
Oxygen at Nanomolar Levels Reversibly Suppresses Process Rates and Gene Expression in Anammox and Denitrification in the Oxygen Minimum Zone off Northern Chile
Oxygen distribution and aerobic respiration in the north and south eastern tropical Pacific oxygen minimum zones
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
Vertical partitioning of nitrogen-loss processes across the oxic-anoxic interface of an oceanic oxygen minimum zone
Experimental Incubations Elicit Profound Changes in Community Transcription in OMZ Bacterioplankton
Metagenomes of the Picoalga Bathycoccus from the Chile Coastal Upwelling
Microbial metatranscriptomics in a permanent marine oxygen minimum zone
Microbial oceanography of anoxic oxygen minimum zones
Picophytoplankton biomass distribution in the global ocean
Abundance and phylogenetic identity of archaeoplankton in the permanent oxygen minimum zone of the eastern tropical South Pacific
Moored Profiler for High-Frequency Monitoring of Oceanic Microstructures SAMY Profiler Takes Nanoscale Measurements Along The Chilean Coast to Characterize the Water Column
Nitrogen Fixation in Denitrified Marine Waters
Structure and seasonal dynamics of the eukaryotic picophytoplankton community in a wind-driven coastal upwelling ecosystem
Water-column stratification governs the community structure of subtropical marine picophytoplankton
A Cryptic Sulfur Cycle in Oxygen-Minimum-Zone Waters off the Chilean Coast
High diversity of ammonia-oxidizing archaea in permanent and seasonal oxygen-deficient waters of the eastern South Pacific
Natural and human-induced hypoxia and consequences for coastal areas: synthesis and future development
Novel lineages of Prochlorococcus thrive within the oxygen minimum zone of the eastern tropical South Pacific
Anammox bacteria and the anaerobic oxidation of ammonium in the oxygen minimum zone off northern Chile
Autonomous observations of in vivo fluorescence and particle backscattering in an oceanic oxygen minimum zone
Controls on sedimentary nitrogen isotopes along the Chile margin
Determination of ultra-low oxygen concentrations in oxygen minimum zones by the STOX sensor
The oxygen minimum zone of the eastern South Pacific
Bacterial diversity in the oxygen minimum zone of the eastern tropical South Pacific
Bosque: integrated phylogenetic analysis software
Diversity of the marine picocyanobacteria Prochlorococcus and Synechococcus assessed by terminal restriction fragment length polymorphisms of 16S-23S rRNA internal transcribed spacer sequences
Global phylogeography of marine Synechococcus and Prochlorococcus reveals a distinct partitioning of lineages among oceanic biomes
Heterotrophic bacterial production in the eastern South Pacific: longitudinal trends and coupling with primary production
Ammonia-oxidizing beta-Proteobacteria from the oxygen minimum zone off northern Chile
Contribution of picoplankton to the total particulate organic carbon concentration in the eastern South Pacific
High abundances of aerobic anoxygenic photosynthetic bacteria in the South Pacific Ocean
Late Quaternary variability of sedimentary nitrogen isotopes in the eastern South Pacific Ocean
Picoplankton abundance and biomass across the eastern South Pacific Ocean along latitude 32.5 degrees S
A two-component model of phytoplankton absorption in the open ocean: Theory and applications
Anaerobic ammonium oxidation in the oxygen-deficient waters off northern Chile
Melting of the Patagonian Ice Sheet and deglacial perturbations of the nitrogen cycle in the eastern South Pacific
Oceanographic basis of the global surface distribution of Prochlorococcus ecotypes
Communities of nirS-type denitrifiers in the water column of the oxygen minimum zone in the eastern South Pacific
On the annual cycle of coastal and open ocean satellite chlorophyll off Chile (18 degrees-40 degrees S)
Remote sensing of ocean colour: Towards algorithms for retrieval of pigment composition
Bio-optical characteristics of phytoplankton populations in the upwelling system off the coast of Chile
Biological and chemical consequences of the 1997-1998 El Nino in the Chilean coastal upwelling system: a synthesis
Hydrography of the eastern South Pacific Ocean: results from the Sonne 102 cruise, May-June 1995
Iron control of past productivity in the coastal upwelling system off the Atacama Desert, Chile
ON THE ANNUAL CYCLE OF SATELLITE CHLOROPHYLL OFF CHILE (18°-40°S)
Temporal variability of nitrogen cycling in continental-shelf sediments of the upwelling ecosystem off central Chile
Center for oceanographic research opens in Chile
Nitrate supply and demand in the mixed layer of the ocean
Temperature as indicator of optical properties and community structure of marine phytoplankton: implications for remote sensing
Evolution and biological effects of the 1997-98 El Nino in the upwelling ecosystem off northern Chile
Local and remote forcing of sea surface temperature in the coastal upwelling system off Chile
Primary production and community respiration in the Humboldt Current System off Chile and associated oceanic areas
Warming and circulation change in the eastern South Pacific Ocean
Fractionation during remineralization of organic matter in the ocean
Nitrogen Cycling in Sediments from Central Chile (36ºS): Seasonal and Interannual Variability
The 1997/98 El Niño in the Humboldt Current System: a Synthesis

BookWhole (1)

Pelagic oxygen minimum zone microbial communities

ConferencePaper (2)

Microbial communities and their biogeochemical role in the water column of the oxygen minimum zone in the eastern South Pacific
The ANTARES observation network

Editorial (1)

Monitoring Microbial Communities in the Marine Environment

Proyecto (12)

Microbial Oceanography of the Atacama Trench
MICROBIAL CARBON CYCLING IN ANOXIC MARINE ZONES=> NATURE AND SIGNIFICANCE OF AUTOTROPHIC PROCESSES
THAUMARCHAEAL ECOPHYSIOLOGY AMID SEASONAL DE-OXYGENATION ALONG THE CENTRAL CHILEAN COAST
Instituto Milenio de Oceanografía
LINKING BIOGEOCHEMICAL CYCLES IN THE OXYGEN MINIMUM ZONES OF THE EASTERN PACIFIC OCEAN THROUGH SINGLE-CELL GENOMICS OF KEY MICROORGANISMS
Microbial Oceanography of picocyanobacteria in the oxygen minimum zones of the eastern Pacific Ocean
Microbial Initiative in Low Oxygen areas off Concepción and Oregon
Microbial oceanography of the oxygen-deficient waters of the eastern tropical South Pacific
Picophytoplankton functional diversity and impact on the bacterial community in the hyper-oligotrophic South Pacific Ocean
ECOLOGÍA MOLECULAR Y GENÓMICA DE SISTEMAS MICROBIANOS NATURALES
CENTRO DE INVESTIGACIÓN OCEANOGRÁFICO EN EL PACÍFICO SUR-ORIENTAL (COPAS)
THE ROLE OF COASTAL UPWELLING ECOSYSTEM AND THE CONTINENTAL SHELF OFF CONCEPCION BAY, CENTRAL CHILE, IN THE ESTABLISHMENT OF THE MEGABENTHOS UNDER THE INFLUENCE OF THE PERU-CHILE UNDERCURRENT.

Review (6)

Marine pelagic ecosystems
Processes and patterns of oceanic nutrient limitation
Oxygen minimum zones harbour novel viral communities with low diversity
Temporal variability and phylogenetic characterization of planktonic anammox bacteria in the coastal upwelling ecosystem off central Chile
Air-sea carbon dioxide fluxes in the coastal southeastern tropical Pacific
Impacts of atmospheric anthropogenic nitrogen on the open ocean
122
Osvaldo Ulloa

Profesor Titular

Oceanografía

UNIVERSIDAD DE CONCEPCIÓN

Concepción, Chile

7
Veronica Molina

Profesor Asociado

Biologia

Universidad de Playa Ancha

Valparaiso, Chile

7
Laura Farias

Profesor Titular

UNIVERSIDAD DE CONCEPCION

Concepcion, Chile

6
Salvador Ramírez

Ingeniero

Departmento de Oceanografia

Universidad de Concepcion

Concepcion, Chile

5
HERACLIO ESCRIBANO

Profesor Titular

Oceanografía

UNIVERSIDAD DE CONCEPCION

CONCEPCION, Chile

4
Lucy Belmar

Postdoctoral researcher

Departamento de Geofísica

Universidad de Chile

Santiago, Chile

4
Gadiel Alarcon

Coordinador

Operaciones Marinas

Instituto Milenio de Oceanografía

Concepción, Chile

4
Samuel Hormazabal

Profesor Adjunto

Escuela de Ciencias del Mar

PONTIFICIA UNIVERSIDAD CATOLICA DE VALPARAISO

Valparaiso, Chile

3
Carlos Henríquez

Investigador

Biotecnología

Centro de Estudios Avanzados en Zonas Áridas

Coquimbo, Chile

3
Rodrigo De la Iglesia

Profesor Asociado

Genética Molecular y Microbiología

PONTIFICIA UNIVERSIDAD CATÓLICA DE CHILE

Santiago, Chile

3
Giovanni Daneri

Executive Director

CENTRO DE INVESTIGACIÓN EN ECOSISTEMAS DE LA PATAGONIA

Coyhaique, Chile

3
Nicole Trefault

Profesor Asociado

Centro GEMA- Genómica, Ecología y Medio Ambiente

UNIVERSIDAD MAYOR

Santiago, Chile

3
Alexander Galán

Profesor Asistente e Investigador Académico

Vicerrectoría de Investigación y Postgrado

Universidad Católica del Maule

Talca, Chile

3
Bernardo González

Full Professor

UNIVERSIDAD ADOLFO IBAÑEZ

Santiago, Chile

2
Humberto González

Professor

Institute of Marine and Limnological Sciences

UNIVERSIDAD AUSTRAL DE CHILE

Valdivia, Chile

2
Paris Lavín

Profesor asistente

Biotecnologia

Universidad de Antofagasta

Antofagasta, Chile

2
Peter von Dassow

Profesor Associado

Ecología

PONTIFICIA UNIVERSIDAD CATOLICA DE CHILE

Santiago, Chile

2
Oscar Pizarro

Profesor titular

Departamento de Geofísica

DEPARTAMENTO DE GEOFÍSICA, UNIVERSIDAD DE CONCEPCIÓN

Concepcion, Chile

2
Victor Villagran

Ingeniero Civil Electrónico

Geofísica

Universidad de Concepcion

Concepcion, Chile

1
Barbara Jacob

Researcher and coordinator of Ecoclimatic Laboratory

Aquatic Ecosystems Line

Centro de Investigación en Ecosistemas de la Patagonia (CIEP)

Coyhaique, Chile

1
Marcel Ramos

Associate professor

Departamento de Biología Marina

Universidad Católica del Norte

Coquimbo, Chile

1
Silvana Collado

Asistente de Investigación

Proyecto Núcleo Milenio Paleoclima del Hemisferio Sur

Concepción, Chile

1
camila fernandez

Visiting profesor

Oceanography

UNIVERSIDAD DE CONCEPCION (CHILE)/OBSERVATOIRE OCÉANOLOGIQUE DE BANYULS SUR MER (FRANCE)

Concepcion, Chile

1
Silvio Pantoja

Profesor Titular

Oceanography

Universidad de Concepción

Concepción, Chile

1
Renato Quiñones

Profesor titular

Departamento de Oceanografía

UNIVERSIDAD DE CONCEPCION

Concepcion, Chile

1
Carina Lange

Profesor Titular

Oceanografia

UNIVERSIDAD DE CONCEPCIÓN

Concepcion, Chile

1
Juan Ugalde

Assistant Professor

Facultad de Ciencias de la Vida

Universidad Andrés Bello

Santiago, Chile

1
Boris DEWITTE

Researcher

Oceanography

CEAZA

La Serena, Chile

1
Wolfgang Schneider

Profesor Titular

Oceanografia

UNIVERSIDAD DE CONCEPCIÓN

Concepción, Chile

1
Carolina González

Investigador Postdoctoral

Instituto Milenio de Oceanografía

Concepción, Chile

1
Homero Urrutia

Profesor titular

Facultad de Ciencias Biológicas

UNIVERSIDAD DE CONCEPCIÓN

Concepción, Chile

1
Jaime Letelier

jefatura

Oceanografía y Medio Ambiente

Instituto de Fomento Pesquero

Valparaíso, Chile

1
Paulina Montero

Investigador

CENTRO DE INVESTIGACIÓN EN ECOSISTEMAS DE LA PATAGONIA

Coyhaique, Chile

1
Montserrat Aldunate

Investigadora Joven

Instituto Milenio de Oceanografía

Concepción, Chile

1
Héctor Levipan

INVESTIGADOR ACADEMICO

BIOLOGIA

Universidad de Playa Ancha de Ciencias de la Educación

VALPARAISO, Chile

1
Victor Campos

Associate Professor

Microbiology

UNIVERSIDAD DE CONCEPCIÓN

Concepción, Chile