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Old Book

Publication in scientific peer-reviewed journals

h-index = 26; i10-index = 42; total cites =2256 (GoogleScholar, 18 October 2021). 

*Corresponding or co-corresponding author; PI in bold.

68) Tobias-Hünefeldt SP, Wing SR, Baltar F*, Morales SE (2021) Changes in Microbial Community Phylogeny and Metabolic Activity Along the Water Column Uncouple at Near Sediment Aphotic Layers in Fjords. Scientific Reports. 11:19303, https://doi.org/10.1038/s41598-021-98519-2.

67) Breyer E, Böhm M, Reitbauer M, Amano C, Heitger M, Baltar F*(2021) Autofluorescence Is a Common Trait in Different Oceanic Fungi. Journal of Fungi. 7(9), 709. doi: 10.3390/jof7090709.

66) Salazar Alekseyeva K, Mähnert B, Berthiller F, Breyer E, Herndl GJ, Baltar F* (2021) Adapting an Ergosterol Extraction Method with Marine Yeasts for the Quantification of Oceanic Fungal Biomass. Journal of Fungi. 7(9), 690. doi: 10.3390/jof7090690.

65) Srivastava A, Saavedra DEM, Thomson B, Garcia JAL, Zhao Z, Patrick WM, Herndl GJ, Baltar F* (2021) Enzyme promiscuity in natural environments: alkaline phosphatase in the ocean. The ISME Journal. doi: 10.1038/s41396-021-01013-w.

64) Baltar F*,Zhao Z, Herndl GJ (2021) Potential and expression of carbohydrate utilization by marine fungi in the global ocean.  Microbiome. doi: 10.1186/s40168-021-01063-4.

63) Braun A, Spona-Friedl M, Avramov M, Elsner M, Baltar F, Reinthaler T, Herndl GJ, Griebler C (2021) Reviews and syntheses: Heterotrophic fixation of inorganic carbon – significant but invisible flux in environmental carbon cycling. Biogeosciences. 18, 3689–3700.

62) Wenley J, Currie KI, Lockwood S, Thomson B, Baltar F*, Morales SE (2021) Seasonal prokaryotic community linkages between surface and deep ocean water. Frontiers in Marine Science. doi: 10.3389/fmars.2021.659641.

61) Hassanzadeh B, Thomson B, Deans F, Wenley J, Lockwood S, Morales S, Steindler L, Sañudo-Wilhelmy SA, Baltar F, Gómez-Consarnau L (2021) Microbial rhodopsins are increasingly favored over chlorophyll in High Nutrient Low Chlorophyll waters. Environmental Microbiology Reports. doi: 10.1111/1758-2229.12948. 

60) Sjöstedt J, Lapierre JF, Yamashita Y, Baltar F (2021) Editorial: Microbial utilization and transformation of dissolved organic matter in aquatic environments -from streams to the deep ocean. Frontiers in Marine Science. doi:10.3389/fmars.2021.642637. 

59) Baltar F*, Alvarez-Salgado XA, Arístegui J, Benner R, Hansell DA, Herndl GJ, Lønborg C (2021) What Is Refractory Organic Matter in the Ocean?. Frontiers in Marine Science. doi: 10.3389/fmars.2021.642637. 

58) Tobias-Hunefeldt SV, Wenley J, Baltar F, Morales SE (2021) Ecological drivers switch from bottom-up to top-down during model microbial community successions. The ISME Journal. doi: 10.1038/s41396-020-00833-6. 

57)  Thomas S, Pilditch CA, Thrush SF, Baltar F, Crawshaw J, Thomson B, Savage C (2021) Does the Size Structure of Venerid Clam Populations Affect Ecosystem Functions on Intertidal Sandflats? Estuaries and Coasts. doi: 10.1007/s12237-020-00774-5.

56)  Thomson B, Wenley J, Lockwood S, Twigg I, Currie K, Herndl GJ, Hepburn CD, Baltar F* (2020) Relative importance of phosphodiesterase versus phosphomonoesterase (alkaline phosphatase) activities for DOP hydrolysis in epi- and mesopelagic waters. Frontiers in Earth Science. doi: 10.3389/feart.2020.560893.

55) Bagnaro A, Baltar F, Brownstein G, Lee WG, Morales SE, Pritchard DW, Hepburn CD (2020) Reducing the arbitrary: fuzzy detection of microbial ecotones and ecosystems – focus on the pelagic environment.  Environmental Microbiome. doi: 10.1186/s40793-020-00363-w.

54) Arístegui J, Montero MF, Hernández-Hernández N, Alonso-González I, Baltar F, Calleja ML, Duarte C (2020) Variability in water-column respiration and its dependence on organic carbon sources in the Canary Current upwelling region. Frontiers in Earth Science. doi: 10.3389/feart.2020.00349.

53) Hernández-Hernández N, Arístegui J, Montero MF, Velasco-Senovilla E, Baltar F, Marrero-Díaz, Martínez-Marrero A, Rodríguez Santana A (2020) Drivers of plankton distribution across mesoscale eddies at submesoscale range.  Frontiers in Marine Science. doi: 10.3389/fmars.2020.00667.

52) Twigg IM, Baltar F, Hall JR, Hepburn CD (2020) Revealing hydrogen peroxide as an external stressor in macrophyte-dominated coastal ecosystems.  Oecologia, doi: 10.1007/s00442-020-04690-0.

51) Zhao Z, Baltar F, Herndl GJ (2020) Linking extracellular enzymes to phylogeny indicates a predominantly particle-associated lifestyle of deep-sea prokaryotes. Science Advances: 6, eaaz4354, doi: 10.1126/sciadv.aaz4354

50) Moran XAG, Baltar F, Carreira C, Lønborg C (2020) Responses of physiological groups of tropical heterotrophic bacteria to temperature and DOM additions: food matters more than warming. Environmental Microbiology. doi: 10.1111/1462-2920.15007.

49) Nelson K#, Baltar F#,Lamare MD, Morales SE (2020) Ocean acidification affects microbial community and invertebrate settlement on biofilms. Scientific reports: 10:3274, doi: 10.1038/s41598-020-60023-4  (#Nelson & Baltar equal contribution).

48) Baltar F*, Bayer B, Bednarsek N, Deppeler N, Escribano R, Gonzalez CE, Hansman RL, Mishra RK, Moran MA, Repeta DJ, Robinson C, Sintes E, Tamburini C, Valentin LE, Herndl GJ (2019) Towards integrating evolution, metabolism and climate change studies of marine ecosystems. Trends in Ecology & Evolution. doi: 10.1016/j.tree.2019.07.003.

47) Lønborg C, Baltar F, Carreira C, Moran XAG (2019) Dissolved organic carbon source influences tropical coastal heterotrophic bacterioplankton response to experimental warming. Frontiers in Microbiology: 10, 2807, doi: 10.3389/fmicb.2019.02807.

46)  Baltar F* & Herndl GJ (2019) Ideas and perspectives: Is dark carbon fixation relevant for oceanic primary production estimates?. Biogeosciences: 16, 3793–3799, doi:10.5194/bg-16-3793-2019.

45)  Crawshaw J, O’Meara T, Savage C, Thomson B, Baltar F, Thrush SF (2019) Source of organic detritus and bivalve biomass influences nitrogen cycling and extracellular enzyme activity in estuary sediments. Biogeochemistry. doi: 10.1007/s10533-019-00608-y.

44) Tobias-Hunefeldt SV, Baltar F*, Wing SR, Espinel-Velasco N, Morales SE (2019) Depth and location influence prokaryotic and eukaryotic microbial community structure in New Zealand fjords. Science of the Total Environment. 10.1016/j.scitotenv.2019.07.313 

43)  Thomson B, Wenley J, Currie K, Hepburn CD, Herndl GJ, Baltar F*(2019) Resolving the paradox: Continuous cell-free alkaline phosphatase activity despite high phosphate concentrations. Marine Chemistry: 214, 103671, doi: 10.1016/j.marchem.2019.103671.

42) Morales SE, Biswas A, Herndl GJ, Baltar F*(2019) Global structuring of phylogenetic and functional diversity of pelagic fungi by depth and temperature. Frontiers in Marine Science.doi:10.3389/fmars.2019.00131.

41) Baltar F*,De Corte D, Yokokawa T (2019) Bacterial mortality can be a source of cell-free enzymatic activity in the marine environment. Microbes and Environments.doi:10.1264/jsme2.ME18123.

40) Baltar F*,De Corte D, Thomson B, Yokokawa T (2019) Teasing apart the different size pools of extracellular enzymatic activity in the ocean. Science of the Total Environment: 660:690-696. doi: 10.1016/j.scitotenv.2019.01.083

39) Bunse C, Israelsson S, Lundin D, Lindh MV, Sundh J, Martinez Garcia S, Fridolfsson E, Bertos-Frotis M, Baltar F, Legrand C, Pinhassi J (2019). High frequency multi-year variability in Baltic Sea microbial plankton stocks and activities. Frontiers in Microbiology. doi: 10.3389/fmicb.2018.03296

38) Baltar F*,Gutierrez-Rodriguez A, Meyer M, Skudelny I, Sander S, Thomson B, Nodder SD, Middag R, Morales SE (2018) Specific effect of trace metals on marine heterotrophic microbial activity and diversity: key role of Iron and Zinc and hydrocarbon-degrading bacteria. Frontiers in Microbiology. doi: 10.3389/fmicb.2018.03190

37) Morales S, Meyer M, Currie KI, Baltar F*(2018) Are oceanic fronts ecotones? Seasonal changes along the Subtropical Front show fronts as bacterioplankton transition zones but not diversity hotspots. Environmental Microbiology Reports. doi: 10.1111/1758-2229.12618

36) Baltar F* (2018) Watch out for the “living dead”: cell-free enzymes and their fate. Frontiers in Microbiology. doi: 10.3389/fmicb.2017.02438.

35) Thomson B, Hepburn CD, Lamare M, Baltar F*(2017) Temperature and UV light affect the activity of marine cell-free enzymes. Biogeosciences, 14, 3971–3977.

34) Baltar F* and 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

33) Baltar F*, Moran XAG, Lønborg C (2017) Warming and organic matter sources impact the proportion of dissolved to total activities in marine extracellular enzymatic rates. Biogeochemistry. doi:10.1007/s10533-017-0334-9

32) Muthusamy S, Lundin D, Branc RMM, Baltar F, Gonzalez J, Lehtiö J, Pinhassi J (2017) Comparative proteomics reveals signature metabolisms of exponentially growing and stationary phase marine bacteria. Environmental Microbiology. doi: 10.1111/1462-2920.13725

31) Baltar F*, Lundin D, Palovaara J, Lekumberri I, Reinthaler T, Herndl GJ, Pinhassi J (2016) Prokaryotic diversity and functional response to nutrient pulses reveal alternative CO2fixation pathways in the mesopelagic zone of the subtropical North Atlantic. Frontiers in Microbiology. doi: 10.3389/fmicb.2016.01670

30) Baltar F*, Currie KI, 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. doi:10.1016/j.marchem.2016.05.014

29) Baltar F*, Legrand C, Pinhasse 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-2015-639

28) Baltar F*,Currie KI, Stuck E, Stéphanie Roosa, Morales S (2016) Oceanic fronts: abrupt transition zones for bacterioplankton community composition. Environmental Microbiology Reports. doi: 10.1111/1758-2229.12362

27) Baltar F*, Palovaara J, Unrein F, Catala P, Horňák K, Šimek K, Vaqué D, Massana R, Gasol JM, PinhassiJ (2016) Marine bacterial community structure resilience to changes in protist predation under phytoplankton bloom conditions. The ISME Journal, 10, 568–581.

26) Kopf A, Bicak M, Kottmann R, Schnetzer J, Kostadinov I, Lehmann K, Fernandez-Guerra A, Jeanthon C, Rahav E, Ullrich M, Wichels A, Gerdts G, Polymenakou P, Kotoulas G, Siam R, Abdallah RH, Sonnenschein EC, Cariou T, O’GaraF, Jackson S, Orlic S, Steinke M, Busch J, Duarte B, Caçador I, Canning-Clode J, Bobrova O, Marteinsson V, Reynisson E, Magalhães Loureiro C, Luna GM, Quero GM, Löschert C, Kremp A, DeLorenzo ME, Øvreås L, Tolman J, LaRoche J, Penna A, Frischer M, Davies T, Katherine B, Meyer CP, Ramos S, Magalhães C, Jude-Lemeilleur F, Aguirre-Macedo MA, Wang S, Poulton N, Jones S, Collin R, Fuhrmann J, Conan P, Alonso C, Stambler N, Goodwinn K, Yakimov MM, Baltar F, et al (2015). The Ocean Sampling Day Consortium. GigaScience: 4:27. doi:10.1186/s13742-015-0066-5. 

25) Baltar F*, Stuck E, Currie KI, Morales S (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

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

23) Lindh M, Figueroa D, Sjöstedt J, Baltar F, Lundin D, Andersson A, Legrand C, 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. 

22) Lindh MV, Sjöstedt J, Andersson AF, Baltar F, Hugerth LW, Lundin D, Muthusamy S, Legrand C, Pinhassi J (2015) Disentangling seasonal bacterioplankton population dynamics by high frequency sampling. Environmental Microbiology, doi: 10.1111/1462-2920.12720.

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

20) Jiao N, Robinson C, Azam F, Thomas H, Baltar F, Dang H,
Hardman-Mountford NH, Johnson M, Kirchman DL, Koch BP,
Legendre L, Li C, Liu J, Luo T, Luo Y, Mitra A, Romanou A, Tang K, Wang X, Zhang C, 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

19) Palovaara J, #Akram N, #Baltar F, Bunse C, Forsberg J, Pedrós-Alió C, González JM, Pinhassi (2014) Stimulation of growth by proteorhodopsin phototrophy involves regulation of central metabolic pathways in marine planktonic bacteria. Proceedings of the National Academy of Sciences of the USA, 111 (35), E3650–E3658, doi: 10.1073/pnas.1402617111 (#Akram & Baltar equal contribution).

18) Baltar F*, Reinthaler T, Herndl GJ, Pinhassi J (2013) Major effect of hydrogen peroxide on bacterioplankton metabolism in the epi-, meso- and bathypelagic NE Atlantic. PLoS ONE8(4): e61051. doi:10.1371/journal.pone.0061051. 

17) Lindh MV, Riemann L, Baltar F, Romero-Oliva C, Salomon P, Granéli E, Pinhassi J (2013) Consequences of increased temperature and acidification on bacterioplankton community composition during a mesocosm spring phytoplankton bloom in the Baltic Sea. Environmental Microbiology Reports: 5. 252-262. 

16) Baltar F*, Arístegui J, Gasol JM, Yokokawa T, Herndl GJ (2013) Bacterial versus archaeal origin of extracellular enzymatic activity in the northeast Atlantic deep waters. Microbial Ecology:65: 277–288. 

15) Baltar F*, Lindh M, Parparov A, Berman T, Pinhassi J (2012) Prokaryotic community structure and respiration during long-term incubations. MicrobiologyOpen: 1(2): 214–224. 

14) Baltar F*, Arístegui J, Gasol JM, Herndl GJ (2012) Microbial functioning and community structure variability in the mesopelagic and epipelagic waters of the subtropical NE Atlantic. Applied and Environmental Microbiology: 78, 3309-3316. 

13) Baltar F*, Arístegui J, Gasol JM, Herndl GJ (2010) Prokaryotic carbon utilization in the dark ocean: growth efficiency, leucine-to-carbon conversion factors, and their relation. Aquatic Microbial Ecology: 60, 227–232. 

12) Burd AB, Hansell DA, Steinberg DK, Anderson TR, Arístegui J, Baltar F, Beaupré SR, Beusseler KO, DeHairs F, Jackson GA, Kadko D, Koppelmann R, Lampitt RS, Nagata T, Reinthaler T, Robinson C, Robison B, Tamburini C, 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 II57 (16), 1557-1571

11) Nagata T, Tamburini C, Arístegui J, Baltar F, Bochdansky A, Fonda-Unami S, Fukuda H, Gogou A, Hansell DA, Hansman RL, Herndl GJ, Panagiotopoulos C, Reinthaler T, Sohrin R, Verdugo P, Yamada N, Yamashita Y, Yokokawa T, Bartlett DH (2010) Emerging concepts on microbial processes in the bathypelagic ocean – ecology, biogeochemistry and genomics. Deep Sea Research Part II57 (16), 1519-1536

10) Baltar F*, Arístegui J, Sintes E, Reinthaler T, Gasol JM, Herndl GJ (2010) Significance of non-sinking particulate organic carbon and dark CO2fixation to heterotrophic carbon demand in the mesopelagic Atlantic. Geophysical Research Letters: 37, L09602, doi: 10.1029/ 2010GL043105. 

9) Baltar F*, Arístegui J, Gasol JM, Lekunberri I, Herndl GJ (2010) Mesoscale eddies: hot-spots for prokaryotic diversity and function in the ocean. The ISME Journal, 4, 975–988, doi: 10.1038/ ismej.2010.33. 

8) Baltar F*, Arístegui J, Gasol JM, Sintes E, van Aken HM, Herndl GJ (2010) High dissolved extracellular enzymatic activity in the deep Central Atlantic Ocean. Aquatic Microbial Ecology: 58, 287–302. 

7) Boras J, Sala MM, Baltar F, Arístegui J, Duarte CM, Vaqué D (2010) Impact of viruses and protists on bacteria in eddies of the Canary Current region (subtropical Northeast Atlantic). Limnology and Oceanography: 55(2), 885–898. 

6) Gasol JM, Alonso-Sáez L, Vaqué D, Baltar F, Calleja ML, Duarte CM, 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, 189-196.

5) Baltar F*, Arístegui J, Montero MF, Espino M, Gasol JM, Herndl GJ (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, 180-188. 

4) Baltar F*, Sintes E, van Aken HM, Gasol JM, Arístegui J, Herndl GJ (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. 

3) Baltar F*, Arístegui J, Gasol JM, Sintes E, Herndl GJ (2009) Evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the (sub)tropical North Atlantic. Limnology and Oceanography: 54(1), 182-193.

2) Herndl GJ, Agogué H, Baltar F, Reinthaler T, Sintes E, Varela MM (2008) Regulation of aquatic microbial processes: the ‘microbial loop’ of the sunlit surface waters and the dark ocean dissected. Aquatic Microbial Ecology: 53, 59-68.

1) Baltar F*, Arístegui J, Gasol JM, Hernández-León S, Herndl GJ (2007) Strong coastal-ocean and surface-depth gradients in prokaryotic assemblage structure and activity in a coastal transition zone region. Aquatic Microbial Ecology: 50, 63-74.