Publications Dr. Helena Osterholz

Publications

Shah Walter, S.R., Jaekel, U., Osterholz, H., Fisher, A.T., Huber, J.A., Pearson, A., Dittmar, T., Girguis, P.R. (2018) Microbial decomposition of marine dissolved organic matter in cool oceanic crust. Nature Geoscience 11, 334-339

Emilson, E.J.S., Carson, M.A., Yakimovich, K.M, Osterholz, H.,Dittmar, T., Gunn, J.M, Mykytczuk, N.C.S., Basiliko, N., Tanentzap A.J. (2018) Climate-driven shifts in sediment chemistry enhance methane production in northern lakes. Nature Communications 9(1) DOI: 10.1038/S41467-018-04236-2

Martínez-Pérez, A.M., Osterholz, H., Nieto-Cid, M., Álvarez, M., Dittmar, T., Álvarez-Salgado, X.A. (2017) Molecular composition of dissolved organic matter in the Mediterranean Sea. Limnology and Oceanography (doi: 10.1002/lno.10600)

Martínez-Pérez, A.M., Nieto-Cid, M., Osterholz, H., Catalá, T.S., Reche, I., Dittmar, T., Álvarez-Salgado, X.A. (2017) Linking optical and molecular signatures of dissolved organic matter in the Mediterranean Sea. Scientific Reports 7:1 (doi: 10.1038/s41598-017-03735-4).

Osterholz H., Kirchman D.L., Niggemann J., Dittmar T. (2016) Environmental drivers of dissolved organic matter molecular composition in the Delaware Estuary. Frontiers in Earth Science 4:95 (doi: 10.3389/feart.2016.00095)

Benavides, M., Bonnet, S., Hernández N, Martinez-Pérez, A., Nieto-Cid, M., Àlvarez-Salgado, X.A., Banos, I., Montero, M.F., Mazuecos, I.P., Gasol, J.M., Osterholz, H., Dittmar, T., Berman-Frank, I., Aristegui, J. (2016) Basin-wide N2 Fixation in the deep waters of the Mediterranean Sea. Global Biogeochemical Cycles 30, 952-961

Osterholz, H., Singer, G., Wemheuer, B., Daniel, R., Niggemann, J., Dittmar, T. (2016) Deciphering associations between dissolved organic molecules and bacterial communities in a pelagic marine system. ISME Journal, 10, 1717-1730

Osterholz, H., J. Niggemann, H.-A. Giebel, M. Simon, T. Dittmar (2015) Inefficient microbial production of refractory dissolved organic matter in the ocean. Nature Communications: DOI:10.1038/ncomms8422

Osterholz, H., Niggemann, J., Dittmar, T. (2014) Molecular evidence for rapid dissolved organic matter turnover in Arctic fjords. Marine Chemistry 160, 1-10

Osterholz, H., Simon, H., Beck, M., März, J., Rackebrandt, S., Brumsack, H.-J., Feudel, U, Simon, M. (2014) Impact of diatom growth on trace metal dynamics (Mn, Mo, V, U). Journal of Sea Research 87, 35-45

Poster and Talks

Osterholz, H., Kirchman, D.L., Niggemann, J., Dittmar, T. Seasonal and Interannual Variability of the Dissolved Organic Matter Composition in the Delaware Estuary. OSM, New Orleans, USA, Feb 21-26 2016 (Talk)

Osterholz, H., Niggemann, J., Giebel, H.A., Simon, M. Dittmar, T. Inefficient Microbial Production of Refractory Dissolved Organic Matter in the Ocean. Gordon Research Seminar and Conference: Chemical Oceanography, Holderness, USA, Jul 24-31 2015 (Talk, Poster)

Osterholz, H., Singer, G., Wemheuer, B., Daniel, R., Niggemann, J., Dittmar, T. Terrigenous Input and Microbial Processing – Driving Forces of Dissolved Organic Matter Composition in the North Sea. ASLO, Granada, Spain, Feb 22-27 2015 (Talk)

Osterholz, H., Singer, G., Wemheuer, B., Daniel, R., Giebel, H.A., Simon, M., Niggemann, J., Dittmar, T. Deciphering associations between dissolved organic molecules and bacteria in a natural marine system. Workshop: Geo-Metabolomic: first steps towards a systems biology understanding of organic matter cycling in aquatic systems, Delmenhorst Germany, Nov 24-28 2014 (Talk)

Osterholz H., Niggemann, J., Feenders, C., Blasius, B., Simon, M., Dittmar T. Fast production of diverse organic matter by a natural microbial community. YOUMARES 4. German Young Marine Scientist Meeting, Oldenburg, Germany, Sep 11-13, 2013 (Invited Talk)

Osterholz H., Müllenmeister S., Kramer C., Simon M., Niggemann J., Dittmar T. Fast transformation of freshly produced compounds into refractory dissolved organic matter. ASLO, New Orleans, USA, Feb 17-22 2013 (Talk)

Osterholz, H., Engelen, B., Fuchs, B., Dittmar, T., Niggemann J. Molecular Evidence for rapid dissolved organic matter turnover in Arctic fjords. 3rd Meeting of SCOR WG 134 – The Microbial Carbon Pump in the Ocean, Delmenhorst, Germany, Aug 27-28 2012 (Poster)

Osterholz, H., Engelen B., Niggemann J., Dittmar T. Linking Dissolved Molecules and Microorganisms – A Case Study in Arctic Fjords. YOUMARES 2. German Young Marine Scientist Meeting, Bremerhaven, Germany, Sep 7-9 2011 (Talk)

 

Cruise Participations

12/15 - 01/16   R/V Sonne Cruise SO245 crossing the South Pacific Gyre

12/11 - 01/12   R/V Polarstern Cruise ANTXXVIII-II to Antarctica

07/11              R/V Heincke Cruise to the German Bight and North Atlantic

08/10              MS Farm excursion to western Svalbard, Norway

04/08              R/V Heincke Cruise to the German Bight

Public Outreach

08-09/11 IdeenExpo 2011 – Science Fair in Hannover for students, help with organization
             and coordination of exhibition from MPI/ICBM Oldenburg.

11/11     Berufswahlbörse Gymnasium Eversten Oldenburg – Job Fair, introducing Marine
             Environmental Sciences program of the University of Oldenburg to high school
             students.

Awards

Award for outstanding dissertaion "From freshly produced compounds to refractory molecules - tracing sources and fate of dissolved organic matter in the ocean" from the Carl von Ossietzky University, Oldenburg.

Award for outstanding master thesis "Trace metal dynamics during the growth of characteristic diatoms of the North Sea and the impact of bacteria - a microcosm study" from the Carl von Ossietzky University, Oldenburg.