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Dr. Helena Osterholz

Helena Osterholz
Scientist
 
Address:
Leibniz Institute for Baltic Sea Research Warnemünde
Seestraße 15
18119 Rostock
Germany
Phone: +49 381 5197 312
E-Mail: helenullna.osterholz@iow.de
Room:  430

Research

I am an aquatic biogeochemist with a strong affiliation towards analytical chemistry. My research focuses on understanding the drivers of organic matter concentration and composition in freshwater and marine environments, from lakes to the deep ocean, with emphasis on the Baltic Sea.

Project PlumeBase: The anthropogenic imprint on the organic matter in coastal seas is significant. Especially in the Baltic Sea, shipping emissions contribute organic pollutants and nutrients to the water column. In the DFG-funded project PlumeBaSe we study the transport of ship emission aerosols from the smokestacks to the water column with project partners from the University of Rostock, Germany, and Charles University Prague, Czechia since 2022. Tassiana Serafim works on this project as part of her PhD thesis.

During our first project expedition with the research vessel RV Elisabeth Mann Borgese in April 2023 (EMB315), we were able to take aerosol and water samples, and deploy a 12m helium filled airship to follow ship plumes around the main shipping lanes of the southwestern Baltic Sea. You can find some impressions here: Video EMB315, days 9+10.

I am also part of the Study Group "Sources, Transport and Sinks of Black Carbon in the Ocean" at the Hanse Wissenschaftskolleg for Advanced Study.

Organic matter in the Baltic Sea: Organic matter composition and concentration in the coastal environment is driven by multiple processes, including riverine input, groundwater discharge, porewater flux, land runoff and in situ production and respiration. Especially in the first few meters near the shore, the variability is high with a strong terrigenous component. Its composition may govern the fate of emerging pollutants, that reach the ocean from land-based sources. Jann Müller studies the near-shore environment within the S2B - Shallow Water Processes and Transitions to the Baltic Scale using optical and mass spectrommetry-based methods during his PhD.

 

CV

Senior Researcher, Co-Group Lead (05/23-present)

Leibniz Institute for Baltic Sea Research
Department Marine Chemistry, Organic Trace Substances Group

Tenure-Track Scientist (11/19-05/23)

Leibniz Institute for Baltic Sea Research
Department Marine Chemistry, Organic Trace Substances Group

Postdoctoral Scientist (7/14-11/19)

Carl von Ossietzky University, Oldenburg, Germany
ICBM-MPI Bridging Group for Marine Geochemistry

PhD (5/10-07/14)

Carl von Ossietzky University, Oldenburg, Germany and Max Planck Institute for Marine Microbiology, Bremen, Germany
Thesis “From freshly produced compounds to refractory molecules – tracing the fate of organic matter in the ocean”, Prof. Dr. T. Dittmar

Master of Science (10/07-03/10)

Carl von Ossietzky University, Oldenburg, Germany
Marine Environmental Sciences
Thesis “Trace metal dynamics during the growth of characteristic diatoms of the North Sea and the impact of bacteria – a microcosm study”, Prof. Dr. M. Simon and Dr. Melanie Beck

Bachelor of Science (10/04-9/07)

University of Bielefeld, Germany
Environmental Sciences
Thesis “Identification of highly volatile compounds in biological samples”, Dr. M. B. Lissel and Dr. S. Steinfartz

Expeditions

R/V Elisabeth Mann Borgese EMB347, Rostock, Germany – Rostock, Germany. Chief Scientist (Aug 24 - Aug 31 2024), Southwestern Baltic Sea

R/V Sonne SO305-2, Singapore – Port Louis, Mauritius. Chief Scientist: Prof. J.J. Waniek (Jul 16 2015 - Aug 05 2024)

R/V Elisabeth Mann Borgese EMB315, Rostock, Germany – Rostock, Germany. Chief Scientist (Mar 31 - Apr 12 2023), Southwestern Baltic Sea

R/V Elisabeth Mann Borgese EMB309, Rostock, Germany – Rostock, Germany. Chief Scientist (Sept 14 - Sept 16 2022), Equipment Test Cruise Lübeck Bay

R/V Sonne SO245, Antofagasta, Chile – Wellington, New Zealand. Chief Scientist: Dr. T. Ferdelman (Dec 17 2015 - Jan 28 2016)

R/V Polarstern ANTXXVIII-II, Cape Town, South Africa – Antarctica – Cape Town, South Africa. Chief Scientist: Prof. G. Kattner (Dec 3 2011 - Jan 5 2012)

R/V Heincke HE361, German Bight and North Atlantic. Chief Scientist: Prof. M. Simon (Jul 12 - Jul 29 2011)

MS FARM and Kings Bay Marine Laboratory – Svalbard fjords, Norway (Aug 31 - Sep 15 2010)

 

Publications

2026

  • Carolin Peter and Helge‐Ansgar Giebel and Bingli Clark Chai and Tassiana S. G. Serafim and Carola Lehners and Oliver Wurl and Helena Osterholz and Janina Rahlff (2026). Surface slicks structure microbial and viral neuston in relation to biogeochemical conditions. Limnol. Oceanogr. 71/5: , doi:10.1002/lno.70387
  • Peter, C., H.-A. Giebel, B. C. Chai, T. S. G. Serafim, C. Lehners, O. Wurl, H. Osterholz and J. Rahlff (2026). Surface slicks structure microbial and viral neuston in relation to biogeochemical conditions. Limnol. Oceanogr. 71: e70387, doi: 10.1002/lno.70387
  • Serafim, T. S. G., H. Simon, J. Niggemann, C. P. Rüger, R. Zimmermann, T. N. L. Mairon, J. J. Waniek and H. Osterholz (2026). Differential Drivers of Thermogenic and Bulk Dissolved Organic Matter in the Indian Ocean. Glob. Biogeochem. Cycles 40: e2025GB008975, doi: 10.1029/2025GB008975

2025

  • Katz, S. D., H. Osterholz, R. Barton, E. R. M. Druffel, X. Gao, C. A. Masiello, C. Santin, T. S. G. Serafim, S. Wagner, M. Zabel and R. Lohmann (2025). Changes in pyrogenic tracers over the last 15,000 years in the Congo river catchment through multi-method analysis. J. Geophys. Res. Biogeosciences 130: e2025JG008772, doi: 10.1029/2025JG008772
  • Lønborg, C., I. Fuentes-Santos, C. Carreira, V. Amaral, J. Arístegui, P. Bhadury, M. B. Bif, M. L. Calleja, Q. Chen, L. C. Cotovicz Jr., S. Cozzi, B. D. Eyre, E. E. García-Martín, M. Giani, R. Gonçalves-Araujo, R. Gruber, D. A. Hansell, J. M. Holding, W. Hunter, J. S. P. Ibánhez, V. Ibello, P. Kowalczuk, F. Maggioni, P. Magni, P. Martin, S. L. McCallister, X. A. G. Morán, J. M. Oakes, H. Osterholz, H. Park, D. Rueda-Roa, J. Shan, E. Teira, N. Ward, Y. Yamashita, L. Yang, Q. Zheng and X. A. Álvarez-Salgado (2025). Dissolved Organic Carbon in Coastal Waters: Global Patterns, Stocks and Environmental Physical Controls. Glob. Biogeochem. Cycles 39: e2024GB008407, doi: 10.1029/2024GB008407
  • Serafim, T. S. G., D. E. Schulz-Bull, C. P. Rüger, T. Dittmar, J. Niggemann, R. Zimmermann, J. J. Waniek and H. Osterholz (2025). Imprint of incomplete combustion processes on the water column of the anthropogenic-pressured Baltic Sea. Sci. Total Environ. 964: 178537, doi: 10.1016/j.scitotenv.2025.178537
  • Voss, M., P. Holtermann, S. Ahmerkamp, D. L. Arévalo Martínez, B. Cahill, M. Chouksey, J. W. Dippner, J. Dutz, P. Feldens, J. Geersen, K. Gentsch, M. Gogina, D. Herlemann, J. Henkel, M. Kanwischer, B. Krebs, A. Kremp, A. Malissery, R. Mars, J. Müller, S. Neubert, H. Osterholz, H. Radtke, G. Rehder, K. Romoth, M. Sass, I. Sassenhagen, O. Schmale, M. v. Thenen, M. v. Weber and O. Zielinski (2025). Coastal zones of the Baltic Sea in the Anthropocene: Current state and the impact of climate change. Estuar. Coast. Shelf Sci. 326: 109504, doi: 10.1016/j.ecss.2025.109504
  • Wallmann, K. J. G., M. Schmidt and Arbeitsgruppe "Ringversuch" (2025). Ringversuch zur Bestimmung der Kohlenstoffgehalte in Oberflächensedimenten der Deutschen Ostsee. Kiel, Germany: GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel. 23 S. doi: 10.3289/KOMSO_AP1.2
  • Wang, J., L. Qu, H. Osterholz, Y. Qi, X. Zeng, E. Bai and C. Wang (2025). Effects of DOM Chemodiversity on Microbial Diversity in Forest Soils on a Continental Scale. Glob. Change Biol. 31: e70131, doi: 10.1111/gcb.70131
  • Waniek, J. J., H. Osterholz and H. C. Frazão (2025). A Global Inventory of Natural and Synthetic Estrogens in Aquatic Systems. Annu. Rev. Mar. Sci. 17: 511-536, doi: 10.1146/annurev-marine-032123-025855
  • Yi, Y., A. J. Tanentzap, C. He, J. Merder, H. Osterholz, H. Bao, J. A. Hawkes, R. Cai, S.-L. Li, Q. Shi, S. Xu, C. Zhang, C.-Q. Liu, M. Zhao and D. He (2025). Underestimated input of terrestrial dissolved organic carbon to the ocean. Proc. Nat. Acad. Sci. U.S.A. 122: e2505838122, doi: 10.1073/pnas.2505838122

2024

  • Lønborg, C., C. Carreira, G. Abril, S. Agustí, V. Amaral, A. Andersson, J. Arístegui, P. Bhadury, M. B. Bif, A. V. Borges, S. Bouillon, M. L. Calleja, L. C. Cotovicz Jr, S. Cozzi, M. Doval, C. M. Duarte, B. Eyre, C. G. Fichot, E. E. García-Martín, A. Garzon-Garcia, M. Giani, R. Gonçalves-Araujo, R. Gruber, D. A. Hansell, F. Hashihama, D. He, J. M. Holding, W. R. Hunter, J. S. P. Ibánhez, V. Ibello, S. Jiang, G. Kim, K. Klun, P. Kowalczuk, A. Kubo, C.-W. Lee, C. B. Lopes, F. Maggioni, P. Magni, C. Marrase, P. Martin, S. L. McCallister, R. McCallum, P. M. Medeiros, X. A. G. Morán, F. E. Muller-Karger, A. Myers-Pigg, M. Norli, J. M. Oakes, H. Osterholz, H. Park, M. Lund Paulsen, J. A. Rosentreter, J. D. Ross, D. Rueda-Roa, C. Santinelli, Y. Shen, E. Teira, T. Tinta, G. Uher, M. Wakita, N. Ward, K. Watanabe, Y. Xin, Y. Yamashita, L. Yang, J. Yeo, H. Yuan, Q. Zheng and X. A. Álvarez-Salgado (2024). A global database of dissolved organic matter (DOM) concentration measurements in coastal waters (CoastDOM v1). Earth Syst. Sci. Data 16: 1107-1119, doi: 10.5194/essd-16-1107-2024
  • Naumann, M., U. Gräwe, L. Umlauf, H. Burchard, V. Mohrholz, J. Kuss, M. Kanwischer, H. Osterholz, S. Feistel, I. Hand, J. J. Waniek and D. E. Schulz-Bull (2024). Hydrographic-hydrochemical assessment of the Baltic Sea 2022. Warnemünde: Leibniz Institute for Baltic Sea Research. (Meereswissenschaftliche Berichte), doi: 10.12754/msr-2024-0127
  • Naumann, M., U. Gräwe, V. Mohrholz, J. Kuss, M. Kanwischer, H. Osterholz, S. Feistel, I. Hand and J. J. Waniek (2024). Hydrographic-hydrochemical assessment of the Baltic Sea 2023. Warnemünde: Leibniz Institute for Baltic Sea Research. (Meereswissenschaftliche Berichte), doi: 10.12754/msr-2024-128.
  • Osterholz, H., T. M. Gröger, J. Hovorka, S. K. Piel, T. Serafim, J.-G. Müller, J. Jeschek, H. Hakkim, P. Pačes, M. Fedorenko, D. Šmok and P. Brodský (2024). Tracing of ship plumes and impact to seawater Cruise No. EMB347, 24.8.2024 - 31.8.2024, Rostock (Germany) - Rostock (Germany). Bonn: Begutachtungspanel Forschungsschiffe. doi: 10.48433/cr_emb347
  • Waniek, J. J., R. Prien, J. Reineccius, T. Serafim, H. Osterholz, U. Fensky, C. Fechtel, M. Floth-Peterson, T. Mairon, K. Witt, O. Dellwig, A. Köhler, M. Dierken, M. Kolbe, J. Jeschek, B. Gaye, J. Leonhardt, M. Metzke, C. Devey, B. Bauer, J. Kreh, I. Kremin, F. Zhou, T. Ziolkowski, Z. Xie and L. Mi (2024). Emerging Pollutants and Microplastic Abundance in Surface Waters of Indian Ocean, High-resolution seafloor Mapping and Magnetic field characterization of the Argo transform fault at the Central Indian Ridge, Cruise No. SO305/2, 16.07.2024-05.08.2024, Singapore (Singapore) - Port Louis (Mauritius). 2510-764X. Bonn: Begutachtungspanel Forschungsschiffe. 1-33. doi: 10.48433/cr_so305_2

2023

  • Kajan, K., H. Osterholz, J. Stegen, M. Gligora Udovič and S. Orlić (2023). Mechanisms shaping dissolved organic matter and microbial community in lake ecosystems. Water Res. 245: 120653, doi: 10.1016/j.watres.2023.120653
  • Naumann, M., U. Gräwe, V. Mohrholz, J. Kuss, M. Kanwischer, H. Osterholz, S. Feistel, I. Hand, J. J. Waniek and D. E. Schulz-Bull (2023). Hydrographic-hydrochemical assessment of the Baltic Sea 2021. Rostock: Leibniz Institute for Baltic Sea Research Warnemünde. 94 S. (Meereswissenschaftliche Berichte = Marine Science Reports ; 123), doi: 10.12754/msr-2021-0123
  • Osterholz, H., S. K. Piel, T. M. Gröger, E. I. Rosewig, T. Serafim, J. Schnelle-Kreis and J. Hovorka (2023). Characterization of ship aerosols from smokestacks to the Baltic Sea water, Cruise No. EMB315, 31.3.2023 - 12.4.2023, Rostock Marienehe (Germany) - Rostock Marienehe (Germany). Bonn: Begutachtungspanel Forschungsschiffe;. doi: 10.48433/cr_emb315
  • Rosewig, E. I., J. Schade, J. Passig, H. Osterholz, R. Irsig, D. Smok, N. Gawlitta, J. Schnelle-Kreis, J. Hovorka, D. Schulz-Bull, R. Zimmermann and T. W. Adam (2023). Remote detection of different marine fuels in exhaust plumes by onboard measurements in the Baltic Sea using single-particle mass spectrometry. Atmosphere 14: 849, doi: 10.3390/atmos14050849

2022

  • Braga, L. P. P., C. Orland, E. J. S. Emilson, A. A. Fitch, H. Osterholz, T. Dittmar, N. Basiliko, N. C. S. Mykytczuk and A. J. Tanentzap (2022). Viruses direct carbon cycling in lake sediments under global change. Proc. Nat. Acad. Sci. U.S.A. 119: e2202261119, doi: 10.1073/pnas.2202261119
  • Duerschlag, J., W. Mohr, T. G. Ferdelman, J. LaRoche, D. Desai, P. L. Croot, D. Voß, O. Zielinski, G. Lavik, S. Littmann, C. Martínez-Pérez, B. Tschitschko, N. Bartlau, H. Osterholz, T. Dittmar and M. M. M. Kuypers (2022). Niche partitioning by photosynthetic plankton as a driver of CO2-fixation across the oligotrophic South Pacific Subtropical Ocean. ISME J. 16: 465–476, doi: 10.1038/s41396-021-01072-z
  • Hildebrand, T., H. Osterholz, C. Bunse, H. Grotheer, T. Dittmar and P. J. Schupp (2022). Transformation of dissolved organic matter by two Indo-Pacific sponges. Limnol. Oceanogr. 67: 2483-2496, doi: 10.1002/lno.12214
  • Kanwischer, M., N. Asker, A.-S. Wernersson, M. A. Wirth, K. Fisch, E. Dahlgren, H. Osterholz, F. Habedank, M. Naumann, J. Mannio and D. E. Schulz-Bull (2022). Correction to: Substances of emerging concern in Baltic Sea water: Review on methodological advances for the environmental assessment and proposal for future monitoring. Ambio 51: 1609-1610, doi: 10.1007/s13280-022-01731-1
  • Kurek, M. R., A. Stubbins, T. W. Drake, T. Dittmar, J. M. S. Moura, R. M. Holmes, H. Osterholz, J. Six, J. N. Wabakanghanzi, B. Dinga, M. Mitsuya and R. G. M. Spencer (2022). Organic molecular signatures of the Congo river and comparison to the Amazon. Glob. Biogeochem. Cycles 36: e2022GB007301, doi: 10.1029/2022GB007301
  • Menges, J., N. Hovius, S. Poetz, H. Osterholz and D. Sachse (2022). Particulate organic matter mobilization and transformation along a Himalayan river revealed by ESI-FT-ICR-MS. J. Geophys. Res. Biogeosciences 127: e2022JG007126, doi: 10.1029/2022JG007126
  • Osterholz, H., S. Turner, L. J. Alakangas, E.-L. Tullborg, T. Dittmar, B. E. Kalinowski and M. Dopson (2022). Terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the Fennoscandian Shield. Nat. Commun. 13: 4837, doi: 10.1038/s41467-022-32457-z
  • Selak, L., H. Osterholz, I. Stanković, N. Hanžek, M. Gligora Udovič, T. Dittmar and S. Orlić (2022). Adaptations of microbial communities and dissolved organics to seasonal pressures in a mesotrophic coastal Mediterranean lake. Environ. Microbiol. 24: 2282-2298, doi: 10.1111/1462-2920.15924
  • Shah Walter, S. R., U. Jaekel, H. Osterholz, A. T. Fisher, J. A. Huber, A. Pearson, T. Dittmar and P. R. Girguis (2023). Addendum: Microbial decomposition of marine dissolved organic matter in cool oceanic crust. Nat. Geosci. 16: 190-191, doi: 10.1038/s41561-022-01107-w

2021

  • Kurek, M. R., A. Stubbins, T. W. Drake, J. M. S. Moura, R. M. Holmes, H. Osterholz, T. Dittmar, B. Peucker-Ehrenbrink, M. Mitsuya and R. G. M. Spencer (2021). Drivers of organic molecular signatures in the Amazon River. Glob. Biogeochem. Cycles 35: e2021GB006938, doi: 10.1029/2021GB006938
  • Naumann, M., U. Gräwe, V. Mohrholz, J. Kuss, M. Kanwischer, H. Osterholz, S. Feistel, I. Hand, J. J. Waniek and D. E. Schulz-Bull (2021). Hydrographic-hydrochemical assessment of the Baltic Sea 2020. Rostock: Leibniz Institute for Baltic Sea Research Warnemünde. 106 S. (Meereswissenschaftliche Berichte = Marine Science Reports ; 119), doi: 10.12754/msr-2021-0119
  • Osterholz, H., C. Burmeister, S. Busch, M. Dierken, H. C. Frazão, R. Hansen, J. Jeschek, A. Kremp, L. Kreuzer, B. Sadkowiak, J. J. Waniek and D. E. Schulz-Bull (2021). Nearshore dissolved and particulate organic matter dynamics in the southwestern Baltic Sea: Environmental drivers and time series analysis (2010–2020). Front. Mar. Sci. 8: 795028, doi: 10.3389/fmars.2021.795028
  • Osterholz, H., D. P. A. Kilgour, D. S. Storey, G. Lavik, T. G. Ferdelman, J. Niggemann and T. Dittmar (2021). Accumulation of DOC in the South Pacific Subtropical Gyre from a molecular perspective. Mar. Chem. 231: 103955, doi: 10.1016/j.marchem.2021.103955

2020

  • Hawkes, J. A., J. D'Andrilli, J. N. Agar, M. P. Barrow, S. M. Berg, N. Catalán, H. Chen, R. K. Chu, R. B. Cole, T. Dittmar, R. Gavard, G. Gleixner, P. G. Hatcher, C. He, N. J. Hess, R. H. S. Hutchins, A. Ijaz, H. E. Jones, W. Kew, M. Khaksari, D. C. Palacio Lozano, J. Lv, L. R. Mazzoleni, B. E. Noriega-Ortega, H. Osterholz, N. Radoman, C. K. Remucal, N. D. Schmitt, S. K. Schum, Q. Shi, C. Simon, G. Singer, R. L. Sleighter, A. Stubbins, M. J. Thomas, N. Tolic, S. Zhang, P. Zito and D. C. Podgorski (2020). An international laboratory comparison of dissolved organic matter composition by high resolution mass spectrometry: Are we getting the same answer? Limnol. Oceanogr. Meth. 18: 235-258, doi: 10.1002/lom3.10364
  • Merder, J., J. A. Freund, U. Feudel, C. T. Hansen, J. A. Hawkes, B. Jacob, K. Klaproth, J. Niggemann, B. E. Noriega-Ortega, H. Osterholz, P. E. Rossel, M. Seidel, G. Singer, A. Stubbins, H. Waska and T. Dittmar (2020). ICBM-OCEAN: Processing ultrahigh-resolution mass spectrometry data of complex molecular mixtures. Anal. Chem. 92: 6832-6838, doi: 10.1021/acs.analchem.9b05659
  • Miranda, M. L., H. Osterholz, H. A. Giebel, P. Bruhnke, T. Dittmar and O. Zielinski (2020). Impact of UV radiation on DOM transformation on molecular level using FT-ICR-MS and PARAFAC. Spectroc. Acta Pt. A - Molec. Biomolec. Spectr. 230: 118027, doi: 10.1016/j.saa.2020.118027
  • Steen, A. D., S. Kusch, H. A. Abdulla, N. Cakić, S. Coffinet, T. Dittmar, J. M. Fulton, V. Galy, K.-U. Hinrichs, A. E. Ingalls, B. P. Koch, E. Kujawinski, Z. Liu, H. Osterholz, D. Rush, M. Seidel, J. Sepúlveda and S. G. Wakeham (2020). Analytical and computational advances, opportunities, and challenges in marine organic biogeochemistry in an era of “Omics”. Front. Mar. Sci. 7: 718, doi: 10.3389/fmars.2020.00718

2019

  • Simon, C., H. Osterholz, A. Koschinsky and T. Dittmar (2019). Riverine mixing at the molecular scale - An ultrahigh-resolution mass spectrometry study on dissolved organic matter and selected metals in the Amazon confluence zone (Manaus, Brazil). Org. Geochem. 129: 45-62, doi: https://doi.org/10.1016/j.orggeochem.2019.01.013
  • Tanentzap, A. J., A. Fitch, C. Orland, E. J. S. Emilson, K. M. Yakimovich, H. Osterholz and T. Dittmar (2019). Chemical and microbial diversity covary in fresh water to influence ecosystem functioning. Proc. Nat. Acad. Sci. U.S.A. 116, 49: 24689-24695, doi: 10.1073/pnas.1904896116

2018

  • Emilson, E. J. S., M. A. Carson, K. M. Yakimovich, H. Osterholz, T. Dittmar, J. M. Gunn, N. C. S. Mykytczuk, N. Basiliko and A. J. Tanentzap (2018). Climate-driven shifts in sediment chemistry enhance methane production in northern lakes. Nat. Commun. 9, 1: 1801, doi: 10.1038/s41467-018-04236-2
  • Osterholz, H., D. L. Kirchman, J. Niggemann and T. Dittmar (2018). Diversity of bacterial communities and dissolved organic matter in a temperate estuary. FEMS Microbiol. Ecol. 94, 8, doi: 10.1093/femsec/fiy119
  • Shah Walter, S. R., U. Jaekel, H. Osterholz, A. T. Fisher, J. A. Huber, A. Pearson, T. Dittmar and P. R. Girguis (2018). Microbial decomposition of marine dissolved organic matter in cool oceanic crust. Nat. Geosci. 11, 5: 334-339, doi: 10.1038/s41561-018-0109-5

2017

  • Martínez-Pérez, A. M., H. Osterholz, M. Nieto-Cid, M. Álvarez, T. Dittmar and X. A. Álvarez-Salgado (2017). Molecular composition of dissolved organic matter in the Mediterranean Sea. Limnol. Oceanogr. 62, 6: 2699-2712, doi: 10.1002/lno.10600
  • Martínez-Pérez, A. M., M. Nieto-Cid, H. Osterholz, T. S. Catalá, I. Reche, T. Dittmar and X. A. Álvarez-Salgado (2017). Linking optical and molecular signatures of dissolved organic matter in the Mediterranean Sea. Sci. Rep. 7, 1: 3436, doi: 10.1038/s41598-017-03735-4

2016

  • Benavides, M., S. Bonnet, N. Hernández, A. M. Martínez-Pérez, M. Nieto-Cid, X. A. Álvarez-Salgado, I. Baños, M. F. Montero, I. P. Mazuecos, J. M. Gasol, H. Osterholz, T. Dittmar, I. Berman-Frank and J. Arístegui (2016). Basin-wide N2 fixation in the deep waters of the Mediterranean Sea. Glob. Biogeochem. Cycles 30, 6: 952-961, doi: 10.1002/2015gb005326
  • Osterholz, H., D. L. Kirchman, J. Niggemann and T. Dittmar (2016). Environmental Drivers of Dissolved Organic Matter Molecular Composition in the Delaware Estuary. Front. Earth Sci. 4, 95, doi: 10.3389/feart.2016.00095
  • Osterholz, H., G. Singer, B. Wemheuer, R. Daniel, M. Simon, J. Niggemann and T. Dittmar (2016). Deciphering associations between dissolved organic molecules and bacterial communities in a pelagic marine system. ISME J. 10, 7: 1717-1730, doi: 10.1038/ismej.2015.231

2015

  • Osterholz, H., J. Niggemann, H. A. Giebel, M. Simon and T. Dittmar (2015). Inefficient microbial production of refractory dissolved organic matter in the ocean. Nat. Commun. 6: 8, doi: 10.1038/ncomms8422

2014

  • Osterholz, H., H. Simon, M. Beck, J. Maerz, S. Rackebrandt, H.-J. Brumsack, U. Feudel and M. Simon (2014). Impact of diatom growth on trace metal dynamics (Mn, Mo, V, U). J. Sea Res. 87: 35-45, doi: https://doi.org/10.1016/j.seares.2013.09.009
  • Osterholz, H., T. Dittmar and J. Niggemann (2014). Molecular evidence for rapid dissolved organic matter turnover in Arctic fjords. Mar. Chem. 160: 1-10, doi: https://doi.org/10.1016/j.marchem.2014.01.002

Working Group:

Organic Trace Substances

Research

CV

Publications