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Dr Federico Baltar

Contact DetailsBaltar new photo

Office: 310 Castle Street
Tel: 64 3 479 5621
Cell: 021 279 5621
Email: federico.baltar@otago.ac.nz

Academic Qualifications

BSc, Marine Sciences, University of Las Palmas de Gran Canaria
MSc and PhD, Oceanography, University of Las Palmas de Gran Canaria

Research Interests

  • Microbial Oceanography
  • Marine Biogeochemistry
  • Aquatic Microbial Ecology
  • Biophysical processes
  • Climate change

Our research in biological oceanography integrates marine microbial ecology and biogeochemistry within the framework of physical oceanography. This research is based on microbes, trying to arrive to a mechanistic understanding of the regulation of marine carbon cycling to better constrain the potential consequences of climate change on the marine biogeochemical cycles and vice versa.
The three main focuses of research include:

  1. the role of bacteria on marine biogeochemical cycles in surface and deep waters,
  2. the influence of mesoscale hydrological features on microbial functioning and diversity, and
  3. the impact of anthropogenic perturbations on marine microbes and carbon cycle.

Courses

MARI 401 Advanced Methods in Marine Science

OCEN 322 Biological Oceanography (coordinator)

MARI 301 Marine Ecology

AQFI 301 Field Methods for Assessment of Fisheries and Aquatic Habitats

ECOL211 Ecology of Communities and Ecosystems

BIOL123 Plants: How They Shape the World

MARI 112 Global Marine Systems

Postgraduate Students

Georgia Bell - Thesis Title (MSc):Ecology of fecal indicators in estuarine waters and shellfish.

Nadjejda Espinel Velasco - Thesis Title (PhD): Response of marine invertebrates to reduced seawater pH and warming at larval settlement and metamorphosis

Jack Hall - Thesis Title (MSc): Bacterial production rates on macro-algal surfaces

Hang Thi Thuy Nguyen - Thesis Title (PhD): The ecophysiology of coralline algae in Southern New Zealand

Ben Robertson - Thesis Title (PhD):Development of a cost-effective trophic state assessment protocol for shallow, temperate, tidal lagoon estuaries.

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Publications

Baltar, F., Palovaara, J., Unrein, F., Catala, P., Horňák, K., Šimek, K., … Pinhassi, J. (2016). Marine bacterial community structure resilience to changes in protist predation under phytoplankton bloom conditions. ISME Journal, 10, 568-581. doi: 10.1038/ismej.2015.135

Baltar, F., Currie, K. I., Stuck, E., Roosa, S., & Morales, S. E. (2016). Oceanic fronts: Transition zones for bacterioplankton community composition. Environmental Microbiology Reports, 8(1), 132-138. doi: 10.1111/1758-2229.12362

Baltar, F., Legrand, C., & Pinhassi, J. (2016). Cell-free extracellular enzymatic activity is linked to seasonal temperature changes: A case study in the Baltic Sea. Biogeosciences, 13, 2815-2821. doi: 10.5194/bg-13-2815-2016

Palovaara, J., Akram, N., Baltar, F., Bunse, C., Forsberg, J., Pedrós-Alió, C., … Pinhassi, J. (2014). Stimulation of growth by proteorhodopsin phototrophy involves regulation of central metabolic pathways in marine planktonic bacteria. PNAS, 111(35), E3650-E3658. doi: 10.1073/pnas.1402617111

Baltar, F., Arístegui, J., Gasol, J. M., Lekunberri, I., & Herndl, G. J. (2010). Mesoscale eddies: Hotspots of prokaryotic activity and differential community structure in the ocean. ISME Journal, 4(8), 975-988. doi: 10.1038/ismej.2010.33

Journal - Research Article

Muthusamy, S., Lundin, D., Branca, R. M. M., Baltar, F., González, J. M., Lehtiö, J., & Pinhassi, J. (2017). Comparative proteomics reveals signature metabolisms of exponentially growing and stationary phase marine bacteria. Environmental Microbiology. Advance online publication. doi: 10.1111/1462-2920.13725

Baltar, F., Morán, X. A. G., & Lønborg, C. (2017). Warming and organic matter sources impact the proportion of dissolved to total activities in marine extracellular enzymatic rates. Biogeochemistry. Advance online publication. doi: 10.1007/s10533-017-0334-9

Baltar, F., & Arístegui, J. (2017). Fronts at the surface ocean can shape distinct regions of microbial activity and community assemblages down to the bathypelagic zone: The Azores Front as a case study. Frontiers in Marine Science, 4, 252. doi: 10.3389/fmars.2017.00252

Baltar, F., Palovaara, J., Unrein, F., Catala, P., Horňák, K., Šimek, K., … Pinhassi, J. (2016). Marine bacterial community structure resilience to changes in protist predation under phytoplankton bloom conditions. ISME Journal, 10, 568-581. doi: 10.1038/ismej.2015.135

Baltar, F., Currie, K. I., Stuck, E., Roosa, S., & Morales, S. E. (2016). Oceanic fronts: Transition zones for bacterioplankton community composition. Environmental Microbiology Reports, 8(1), 132-138. doi: 10.1111/1758-2229.12362

Baltar, F., Legrand, C., & Pinhassi, J. (2016). Cell-free extracellular enzymatic activity is linked to seasonal temperature changes: A case study in the Baltic Sea. Biogeosciences, 13, 2815-2821. doi: 10.5194/bg-13-2815-2016

Baltar, F., Currie, K., Meyer, M., & Verdugo, P. (2016). Proportion of marine organic carbon present in self-assembled gels along the subtropical front and its increase in response to reduced pH. Marine Chemistry, 184, 53-59. doi: 10.1016/j.marchem.2016.05.014

Baltar, F., Lundin, D., Palovaara, J., Lekunberri, I., Reinthaler, T., Herndl, G. J., & Pinhassi, J. (2016). Prokaryotic responses to ammonium and organic carbon reveal alternative CO2 fixation pathways and importance of alkaline phosphatase in the Mesopelagic North Atlantic. Frontiers in Microbiology, 7, 1670. doi: 10.3389/fmicb.2016.01670

Lindh, M. V., Sjöstedt, J., Andersson, A. F., Baltar, F., Hugerth, L. W., Lundin, D., … Pinhassi, J. (2015). Disentangling seasonal bacterioplankton population dynamics by high-frequency sampling. Environmental Microbiology, 17(7), 2459-2476. doi: 10.1111/1462-2920.12720

Lindh, M. V., Figueroa, D., Sjöstedt, J., Baltar, F., Lundin, D., Andersson, A., … Pinhassi, J. (2015). Transplant experiments uncover Baltic Sea basin-specific responses in bacterioplankton community composition and metabolic activities. Frontiers in Microbiology, 6, 223. doi: 10.3389/fmicb.2015.00223

Baltar, F., Stuck, E., Morales, S., & Currie, K. (2015). Bacterioplankton carbon cycling along the Subtropical Frontal Zone off New Zealand. Progress in Oceanography, 135, 168-175. doi: 10.1016/j.pocean.2015.05.019

Baltar, F., Palovaara, J., Vila-Costa, M., Salazar, G., Calvo, E., Pelejero, C., … Pinhassi, J. (2015). Response of rare, common and abundant bacterioplankton to anthropogenic perturbations in a Mediterranean coastal site. FEMS Microbiology Ecology, 91, fv058. doi: 10.1093/femsec/fiv058

Kopf, A., Bicak, M., Kottman, R., Schnetzer, J., Kostadinov, I., Lehmann, K., … Baltar, F., … Glöckner, F. O. (2015). The Ocean Sampling Day Consortium [Commentary]. GigaScience, 4, 27. doi: 10.1186/s13742-015-0066-5

Palovaara, J., Akram, N., Baltar, F., Bunse, C., Forsberg, J., Pedrós-Alió, C., … Pinhassi, J. (2014). Stimulation of growth by proteorhodopsin phototrophy involves regulation of central metabolic pathways in marine planktonic bacteria. PNAS, 111(35), E3650-E3658. doi: 10.1073/pnas.1402617111

Jiao, N., Robinson, C., Azam, F., Thomas, H., Baltar, F., Dang, H., … Zhang, R. (2014). Mechanisms of microbial carbon sequestration in the ocean: Future research directions. Biogeosciences, 11, 5285-5306. doi: 10.5194/bg-11-5285-2014

Muthusamy, S., Baltar, F., González, J. M., & Pinhassi, J. (2014). Dynamics of metabolic activities and gene expression in the Roseobacter clade bacterium Phaeobacter sp. strain MED193 during growth with thiosulfate. Applied & Environmental Microbiology, 80(22), 6933-6942. doi: 10.1128/AEM.02038-14

Lindh, M. V., Riemann, L., Baltar, F., Romero-Oliva, C., Salomon, P. S., Granéli, E., & Pinhassi, J. (2013). Consequences of increased temperature and acidification on bacterioplankton community composition during a mesocosm spring bloom in the Baltic Sea. Environmental Microbiology Reports, 5(2), 252-262. doi: 10.1111/1758-2229.12009

Baltar, F., Arístegui, J., Gasol, J. M., Yokokawa, T., & Herndl, G. J. (2013). Bacterial versus archaeal origin of extracellular enzymatic activity in the northeast Atlantic deep waters. Microbial Ecology, 65(2), 277-288. doi: 10.1007/s00248-012-0126-7

Baltar, F., Reinthaler, T., Herndl, G. J., & Pinhassi, J. (2013). Major effect of hydrogen peroxide on bacterioplankton metabolism in the northeast Atlantic. PLoS ONE, 8(4), e61051. doi: 10.1371/journal.pone.0061051

Baltar, F., Arístegui, J., Gasol, J. M., & Herndl, G. J. (2012). Microbial functioning and community structure variability in the mesopelagic and epipelagic waters of the subtropical northeast Atlantic Ocean. Applied & Environmental Microbiology, 78(9), 3309-3316. doi: 10.1128/AEM.07962-11

Baltar, F., Lindh, M. V., Parparov, A., Berman, T., & Pinhassi, J. (2012). Prokaryotic community structure and respiration during long‐term incubations. MicrobiologyOpen, 1(2), 214-224. doi: 10.1002/mbo3.25

Baltar, F., Arístegui, J., Gasol, J. M., & Herndl, G. J. (2010). Prokaryotic carbon utilization in the dark ocean: Growth efficiency, leucine-to-carbon conversion factors, and their relation. Aquatic Microbial Ecology, 60(3), 227-232. doi: 10.3354/ame01422

Baltar, F., Arístegui, J., Gasol, J. M., Lekunberri, I., & Herndl, G. J. (2010). Mesoscale eddies: Hotspots of prokaryotic activity and differential community structure in the ocean. ISME Journal, 4(8), 975-988. doi: 10.1038/ismej.2010.33

Baltar, F., Arístegui, J., Gasol, J. M., Sintes, E., van Aken, H. M., & Herndl, G. J. (2010). High dissolved extracellular enzymatic activity in the deep central Atlantic Ocean. Aquatic Microbial Ecology, 58(3), 287-302. doi: 10.3354/ame01377

Baltar, F., Arístegui, J., Sintes, E., Gasol, J. M., Reinthaler, T., & Herndl, G. J. (2010). Significance of non-sinking particulate organic carbon and dark CO2 fixation to heterotrophic carbon demand in the mesopelagic northeast Atlantic. Geophysical Research Letters, 37(9), L09602. doi: 10.1029/2010GL043105

Boras, J. A., Sala, M. M., Baltar, F., Arístegui, J., Duarte, C. M., & Vaqué, D. (2010). Effect of viruses and protists on bacteria in eddies of the Canary Current region (subtropical northeast Atlantic). Limnology & Oceanography, 55(2), 885-898. doi: 10.4319/lo.2009.55.2.0885

Burd, A. B., Hansell, D. A., Steinberg, D. K., Anderson, T. R., Arístegui, J., Baltar, F., … Tanaka, T. (2010). Assessing the apparent imbalance between geochemical and biochemical indicators of meso- and bathypelagic biological activity: What the @$#! is wrong with present calculations of carbon budgets? Deep Sea Research Part II, 57(16), 1557-1571. doi: 10.1016/j.dsr2.2010.02.022

Nagata, T., Tamburini, C., Arístegui, J., Baltar, F., Bochdansky, A. B., Fonda-Umani, S., … Bartlett, D. H. (2010). Emerging concepts on microbial processes in the bathypelagic ocean: Ecology, biogeochemistry, and genomics. Deep Sea Research Part II, 57(16), 1519-1536. doi: 10.1016/j.dsr2.2010.02.019

Baltar, F., Arístegui, J., Gasol, J. M., Sintes, E., & Herndl, G. J. (2009). Evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the subtropical North Atlantic. Limnology & Oceanography, 54(1), 182-193. doi: 10.4319/lo.2009.54.1.0182

Gasol, J. M., Alonso-Sáez, L., Vaqué, D., Baltar, F., Calleja, M. L., Duarte, C. M., & Arístegui, J. (2009). Mesopelagic prokaryotic bulk and single-cell heterotrophic activity and community composition in the NW Africa—Canary Islands coastal-transition zone. Progress in Oceanography, 83(1-4), 189-196. doi: 10.1016/j.pocean.2009.07.014

Baltar, F., Arístegui, J., Sintes, E., van Aken, H. M., Gasol, J. M., & Herndl, G. J. (2009). Prokaryotic extracellular enzymatic activity in relation to biomass production and respiration in the meso- and bathypelagic waters of the (sub)tropical Atlantic. Environmental Microbiology, 11(8), 1998-2014. doi: 10.1111/j.1462-2920.2009.01922.x

Baltar, F., Arístegui, J., Montero, M. F., Espino, M., Gasol, J. M., & Herndl, G. J. (2009). Mesoscale variability modulates seasonal changes in the trophic structure of nano- and picoplankton communities across the NW Africa-Canary Islands transition zone. Progress in Oceanography, 83(1-4), 180-188. doi: 10.1016/j.pocean.2009.07.016

Herndl, G. J., Agogué, H., Baltar, F., Reinthaler, T., Sintes, E., & Varela, M. M. (2008). Regulation of aquatic microbial processes: The 'microbial loop' of the sunlit surface waters and the dark ocean dissected. Aquatic Microbial Ecology, 53(1), 59-68. doi: 10.3354/ame01225

Baltar, F., Arístegui, J., Gasol, J. M., Hernández-León, S., & Herndl, G. J. (2007). Strong coast-ocean and surface-depth gradients in prokaryotic assemblage structure and activity in a coastal transition zone region. Aquatic Microbial Ecology, 50(1), 63-74. doi: 10.3354/ame01156

More publications...