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Dr. Tobias Goldhammer

Archived Page

This web page has not been updated since the former colleague left MARUM.

Research

I am interested in global biogeochemical cycles and their modulation over time - both in Earth history and contemporary ecosystems. I am working on the cycles of carbon, iron and phosphorus in open water and sediment, and seek for microbial signatures of criticial transformations.

My research routine includes bench-scale incubation experiments, environmental sampling, geochemical analyses and analytical and numerical modelling. I am particularly fond of stable and radioisotope tracing techniques, as they provide elegant tools to discover microbial transformations of nutrients in the environment.

I am part of the MARUM Inorganic Geochemistry Lab. In MARUM project GB1, my research is about the fluxes and transformations of iron and phosphorus in the water column, the benthic boundary layer, and the sediment surface.

Curriculum Vitae

11.2009 - 01.2016	Researcher at MARUM Center for Marine Environmental Sciences, University of Bremen, Inorganic Geochemistry Lab
07.2006 - 10.2009	PhD student at MARUM Center for Marine Environmental Sciences and Faculty of Geosciences, University of Bremen. Dissertation title: Isotope insights into the phosphorus cycle of marine sediments
10.2000 - 05.2006	Studies of environmental science (diploma in Geoecology), University of Bayreuth. Thesis title: Redox processes of carbon and sulfur in peat soil affected by water table fluctuations

Pipeline

Peer-reviewed

Hawkes JA, Hansen CT, Goldhammer T, Bach W, Dittmar T (in press) Molecular alteration of marine dissolved organic matter under experimental hydrothermal conditions. Geochimica et Cosmochimica Acta doi:10.1016/j.gca.2015.11.025
Goldhammer T, Schwärzle A, Aiello IW, Zabel M (2015) Temporal stability and origin of chemoclines in the deep hypersaline anoxic Urania basin. Geophysical Research Letters doi:10.1002/2015GL063758
Lagostina L, Goldhammer T, Roy H, Evans TW, Lever MA, Jorgensen BB, Groth Petersen D, Schramm A, Schreiber L (2015) Ammonia-oxidizing bacteria of the Nitrosospira cluster 1 dominate over ammonia-oxidizing archaea in oligotrophic surface sediments near the South Atlantic Gyre. Environmental Microbiology Reports doi:10.1111/1758-2229.12264
Yoshinaga MY, Holler T, Goldhammer T, Wegener G, Pohlman JW, Brunner B, Kuypers MMM, Hinrichs KU, Elvert M (2014) Carbon isotope equilibration during sulfate-limited anaerobic oxidation of methane. Nature Geoscience doi:10.1038/ngeo2069
Meador TB, Gagen EJ, Loscar ME, Goldhammer T, Yoshinaga MYY, Wendt J, Thomm, M, Hinrichs KU (2014) Thermococcus kodakarensis modulates its polar membrane lipids and elemental composition according to growth stage and phosphate availability. Frontiers in Extreme Microbiology doi:10.3389/fmicb.2014.00010
Kraft B, Engelen B, Goldhammer T, Lin YS, Cypionka H, Könneke M (2013) Desulfofrigus spec. prevails in sulfate-reducing dilution cultures from sediments of the Benguela upwelling area. FEMS Microbiology Ecology doi:10.1111/1574-6941.12039
Lin YS, Heuer VB, Goldhammer T, Kellermann MY, Zabel M, Hinrichs KU (2012) Towards constraining H2 concentration in subseafloor sediment: a proposal for combined analysis by two distinct approaches. Geochimica et Cosmochimica Acta 77 186-201 doi:10.1016/j.gca.2011.11.008
Goldhammer T, Brunner B, Bernasconi S, Ferdelman T, Zabel M (2011) Phosphate oxygen isotopes: insights into sedimentary phosphorus cycling from the Benguela upwelling system. Geochimica et Cosmochimica Acta 75(13) 3741-3756 doi:10.1016/j.gca.2011.04.006
Goldhammer T, Max T, Brunner B , Einsiedl F, Zabel M (2011) Marine sediment pore-water profiles of phosphate δ18O using a refined micro-extraction. Limnology and Oceanography: Methods 9 110-120 doi:10.4319/lom.2011.9.110
Goldhammer T, Brüchert V, Ferdelman TG, Zabel M (2010) Microbial sequestration of phosphorus in anoxic upwelling sediments. Nature Geoscience 3 557-561 doi:10.1038/ngeo913
Von Suchodoletz H, Oberhänsli H, Faust D, Fuchs M, Blanchet C, Goldhammer T, Zöller L (2010) The evolution of Saharan dust input on Lanzarote (Canary Islands) - influenced by human activity in the northwest Sahara during the Early Holocene? The Holocene 20(2) 1-11 doi:10.1177/0959683609350385
Goldhammer T, Einsiedl F, Blodau C (2008) In situ determination of sulfate turnover in peatlands: a downscaled push-pull tracer technique. Journal of Plant Nutrition and Soil Science 171(5) 740-750doi:10.1002/jpln.200700225
Goldhammer T, Blodau C (2008) Dessication and product accumulation constrain heterotrophic anaerobic respiration in peats of an ombrotrophic temperate bog. Soil Biology and Biochemistry 40(8) 2007-2015 doi:10.1016/j.soilbio.2008.03.005
Heitmann T, Goldhammer T, Beer J, Blodau C (2007) Electron transfer processes of dissolved organic matter and their potential significance for anaerobic respiration in a northern bog. Global Change Biology 13(8) 1771-1785 doi:10.1111/j.1365-2486.2007.01382.x

Recent Conference Contributions

Goldhammer T, Ahrens J, Marshall J, Ferdelman T (2014) Phosphorus burial in ultra-oligotrophic sediments of the South Pacific. EGU General Assembly 2014, Vienna
Goldhammer T, Aiello W, Zabel M (2014) Constraining the temporal evolution of a deep hypersaline anoxic basin by 1D geochemical modelling. EGU General Assembly 2014, Vienna

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