Dr. Kirstin Dähnke

Dr. Kirstin Dähnke

Aquatic Nutrient Cycles

Head of Department

Phone: +49 (0)4152 87-1865

Research
Publications
CV / Resume

My research focuses on the nutrient filter in the coastal zone, especially on N transformations in estuaries and marine and coastal sediments.

In the group, we aim to evaluate the role of different processes regenerating or removing nitrogen, mainly using stable isotope analyses. The assessment of isotope signatures of N-bearing compounds during processing helps to unravel the impact of different processes in the marine/coastal system and also the effect of anthropogenic nutrient loads on an ecosystem.

Neumann, Andreas,van Beusekom, Justus E. E.,Bratek, Alexander,Friedrich, Jana,Möbius, Jürgen,Sanders, Tina,Wolschke, Hendrik,Dähnke, Kirstin (2026) . Reconstructing changes in nitrogen input to the Danube-influenced Black Sea Shelf during the Holocene. Biogeosciences, Vol. 23, 3, 1103-1116, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-23-1103-2026 . OPEN ACCESS
Magozzi, Sarah,Trueman, Clive N.,Cobain, Matthew R.D.,MacKenzie, Kirsteen M.,John Glew, Katie St.,Canseco, José A.,Díaz-Delgado, Eric,Fanelli, Emanuela,Rumolo, Paola,Cartes, Joan E.,Espinasse, Boris,Agnetta, Davide,Albo-Puigserver, Marta,Alomar, Carme,Alvisi, Francesca,Badalamenti, Fabio,Bănaru, Daniela,Berto, Daniela,Bonanno, Angelo,Bonaviri, Chiara,Bongiorni, Lucia,Büyükateş, Yeşim,Calafat Frau, Antonio M.,Camatti, Elisa,Cantoni, Carolina,Cardona, Luis,Carlier, Antoine,Castellano, Michela,Chaikalis, Spyros,Chiggiato, Jacopo,Cibic, Tamara,Conan, Pascal,Conese, Ilaria,Coppari, Martina,Costalago, David,Cresson, Pierre,D’Ambra, Isabella,Dähnke, Kirstin,Darnaude, Audrey M.,Deudero, Salud,Ezgeta-Balić, Daria,Giani, Michele,Gogou, Alexandra,Grégori, Gérald,Guy-Haim, Tamar,Harmelin-Vivien, Mireille L.,Jennings, Simon,Karageorgis, Aristomenis P.,Koppelmann, Rolf,Lampadariou, Nikolaos,Langone, Leonardo,Liénart, Camilla,Mazzocchi, Maria Grazia,Mazzola, Antonio,Meador, Travis B.,Merquiol, Louise,Metzke, Marc,Miserocchi, Stefano,Möbius, Jürgen,Mostajir, Behzad,Mousseau, Laure,Navarro, Joan,Ogrinc, Nives,Pansera, Marco,Pantoja-Gutiérrez, Silvio,Papiol, Vanesa,Parinos, Constantine,Pasqual, Catalina,Pavlidou, Alexandra,Pedrosa-Pàmies, Rut,Pinnegar, John,Polunin, Nicholas V.C.,Protopapa, Maria,Repeta, Daniel J.,Sabatino, Nadia,Sachs, Julian P.,Sanchez-Vidal, Anna,Sarà, Gianluca,Savoye, Nicolas,Schroeder, Anna,Skylaki, Ester,Sigman, Daniel M.,Signa, Geraldina,Sisma-Ventura, Guy,Stavrakaki, Ioanna,Struck, Ulrich,Tesán-Onrubia, Javier A.,Tesi, Tommaso,Uzundumlu, Sinan,Valls, Maria,Vizzini, Salvatrice,Zervoudaki, Soultana,Zgozi, Salem W.,Zoppini, Annamaria,Zorica, Barbara,Willis, Trevor J. (2026) . Spatial models cannot compensate for sampling designs unstructured relative to isotopic variation: implications for baseline isoscape development in the Mediterranean Sea. Progress in Oceanography, Vol. 248, 103794, Elsevier, Amsterdam. DOI: https://doi.org/10.1016/j.pocean.2026.103794 . OPEN ACCESS

Schick, Eva,Döring, Martin,Knieling, Jörg,Ratter, Beate M.W.,Pein, Johannes,Dähnke, Kirstin (2025) . Turning the tide in estuary governance through collaboration? A systematic review, meta-synthesis, and conceptual framework. Ecology and Society, Vol. 30, 4, 6, Resilience Alliance, Wolfville, Nova Scotia. DOI: https://doi.org/10.5751/ES-16321-300406 . OPEN ACCESS
Schulz, Gesa,Dähnke, Kirstin,Sanders, Tina,Penopp, Jan,Bange, Hermann W.,Czeschel, Rena,Gaye, Birgit (2025) . Nitrogen dynamics and nitrate stable isotopes indicate nitrogen loss in the Bay of Bengal. Biogeosciences, Vol. 22, 20, 5943-5959, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-22-5943-2025 . OPEN ACCESS
Russnak, Vanessa,Sanders, Tina,Keuter, Sabine,Koll, Raphael,Dähnke, Kirstin (2025) . The Elbe Estuary microbiome shifts with salinity and discharge and depends on fresh organic matter and nutrient availability. Environmental Microbiology Reports, Vol. 18, 3, e70349, Wiley Blackwell, Hoboken. DOI: https://doi.org/10.1111/1758-2229.70349 . OPEN ACCESS

Minutolo, F.,Dähnke, K.,Metzke, M.,Holtappels, M.,Neumann, A. (2024) . Sedimentary mud and phaeophytin-a are reliable predictors of oxygen consumption and nitrogen turnover in the southern North Sea. Continental Shelf Research, Vol. 272, 105161, Elsevier, Amsterdam. DOI: https://doi.org/10.1016/j.csr.2023.105161 . OPEN ACCESS
Tobias-Hünefeldt, S.P.,van Beusekom, J.E.E.,Russnak, V.,Dähnke, K.,Streit, W.R.,Grossart, H.P. (2024) . Seasonality, rather than estuarine gradient or particle suspension/sinking dynamics, determines estuarine carbon distributions. Science of the Total Environment, Vol. 926, 171962, Elsevier, Amsterdam. DOI: https://doi.org/10.1016/j.scitotenv.2024.171962 . OPEN ACCESS
Aleku, D.L.,Dähnke, K.,Pichler, T. (2024) . Source, transport, and fate of nitrate in shallow groundwater in the eastern Niger Delta. Environmental Science and Pollution Research, Vol. 31, 65034–65050, Springer, Heidelberg. DOI: https://doi.org/10.1007/s11356-024-35499-6 . OPEN ACCESS

Schulz, G.,Sanders, T.,Voynova, Y.G.,Bange, H.W.,Dähnke, K. (2023) . Seasonal variability of nitrous oxide concentrations and emissions in a temperate estuary. Biogeosciences, Vol. 20, 15, 3229–3247, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-20-3229-2023 . OPEN ACCESS
Schulz, G.,van Beusekom, J.E.E.,Jacob, J.,Bold, S.,Schöl, A.,Ankele, M.,Sanders, T.,Dähnke, K. (2023) . Low discharge intensifies nitrogen retention in rivers – a case study in the Elbe River. Science of the Total Environment, Vol. 904, 166740, Elsevier, Amsterdam. DOI: https://doi.org/10.1016/j.scitotenv.2023.166740 . OPEN ACCESS
Norbisrath, M.,Neumann, A.,Dähnke, K.,Sanders, T.,Schöl, A.,van Beusekom, J.E.E.,Thomas, H. (2023) . Alkalinity and nitrate dynamics reveal dominance of anammox in a hyper-turbid estuary. Biogeosciences, Vol. 20, 20, 4307-4321, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-20-4307-2023 . OPEN ACCESS

Sanders, T.,Fiencke, C.,Fuchs, M.,Haugk, C.,Juhls, B.,Mollenhauer, G.,Ogneva, O.,Overduin, P.,Palmtag, J.,Povazhniy, V.,Strauss, J.,Tuerena, R.,Zell, N.,Dähnke, K. (2022) . Seasonal nitrogen fluxes of the Lena River Delta. Ambio, Vol. 51, 2, 423-438, Springer, Secaucus, NJ. DOI: https://doi.org/10.1007/s13280-021-01665-0 . OPEN ACCESS
Tuerena, R.E.,Mahaffey, C.,Henley, S.F.,de la Vega, C.,Norman, L.,Brand, T.,Sanders, T.,Debyser, M.,Dähnke, K.,Braun, J.,März, C. (2022) . Nutrient pathways and their susceptibility to past and future change in the Eurasian Arctic Ocean. Ambio, Vol. 51, 2, 355-369, Springer, Secaucus, NJ. DOI: https://doi.org/10.1007/s13280-021-01673-0 . OPEN ACCESS
Townhill, B.L.,Reppas-Chrysovitsinos, E.,Sühring, R.,Halsall, C.J.,Mengo, E.,Sanders, T.,Dähnke, K.,Crabeck, O.,Kaiser, J.,Birchenough, S.N.R. (2022) . Pollution in the Arctic Ocean: An overview of multiple pressures and implications for ecosystem services. Ambio, Vol. 51, 2, 471-483, Springer, Secaucus, NJ. DOI: https://doi.org/10.1007/s13280-021-01657-0 . OPEN ACCESS
Schulz, G.,Sanders, T.,van Beusekom, J.E.E.,Voynova, Y.G.,Schöl, A.,Dähnke, K. (2022) . Suspended particulate matter drives the spatial segregation of nitrogen turnover along the hyper-turbid Ems estuary. Biogeosciences, Vol. 19, 7, 2007-2024, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-19-2007-2022 . OPEN ACCESS
Tian, S.,Gaye, B.,Tang, J.,Luo, Y.,Lahajnar, N.,Dähnke, K.,Sanders, T.,Xiong, T.,Zhai, W.,Emeis, K.-C. (2022) . Nitrate Regeneration and Loss in the Central Yellow Sea Bottom Water Revealed by Nitrogen Isotopes. Frontiers in Marine Science, Vol. 9, 834953, Frontiers Media, Lausanne. DOI: https://doi.org/10.3389/fmars.2022.834953 . OPEN ACCESS
Tian, S.,Gaye, B.,Tang, J.,Luo, Y.,Li, W.,Lahajnar, N.,Dähnke, K.,Sanders, T.,Xiong, T.,Zhai, W.,Emeis, K.-C. (2022) . A nitrate budget of the Bohai Sea based on an isotope mass balance model. Biogeosciences, Vol. 19, 9, 2397-2415, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-19-2397-2022 . OPEN ACCESS
Marshall, T.,Granger, J.,Casciotti, K.,Dähnke, K.,Emeis, K.,Marconi, D.,McIlvin, M.,Noble, A.,Saito, M.,Sigman, D.,Fawcett, S. (2022) . The Angola Gyre is a hotspot of dinitrogen fixation in the South Atlantic Ocean. Communications Earth & Environment, Vol. 3, 151, Springer Nature, London. DOI: https://doi.org/10.1038/s43247-022-00474-x . OPEN ACCESS
Norbisrath, M.,Pätsch, J.,Dähnke, K.,Sanders, T.,Schulz, G.,van Beusekom, J.,Thomas, H. (2022) . Metabolic alkalinity release from large port facilities (Hamburg, Germany) and impact on coastal carbon storage. Biogeosciences, Vol. 19, 22, 5151-5165, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-19-5151-2022 . OPEN ACCESS
Dähnke, K.,Sanders, T.,Voynova, Y.,Wankel, S. (2022) . Nitrogen isotopes reveal a particulate-matter-driven biogeochemical reactor in a temperate estuary. Biogeosciences, Vol. 19, 24, 5879-5891, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-19-5879-2022 . OPEN ACCESS

Oehler, T.,Ramasamy, M.,George, M.,Babu, S.,Dähnke, K.,Ankele, M.,Böttcher, M.,Santos, I.,Moosdorf, N. (2021) . Tropical Beaches Attenuate Groundwater Nitrogen Pollution Flowing to the Ocean. Environmental Science and Technology, Vol. 55, 12, 8432-8438, ACS, Washington, DC. DOI: https://doi.org/10.1021/acs.est.1c00759 .
Adyasari, D.,Waska, H.,Daehnke, K.,Oehler, T.,Pracoyo, A.,Putra, D.,Moosdorf, N. (2021) . Terrestrial Nutrients and Dissolved Organic Matter Input to the Coral Reef Ecosystem via Submarine Springs. ACS ES & T Water, Vol. 1, 8, 1887-1900, ACS Publications, Washington. DOI: https://doi.org/10.1021/acsestwater.1c00134 . OPEN ACCESS

Pavlidou, A.,Velaoras, D.,Karageorgis, A.,Rousselaki, E.,Parinos, C.,Dähnke, K.,Möbius, J.,Meador, T.,Psarra, S.,Frangoulis, C.,Souvermezoglou, E.,Androni, A.,Assimakopoulou, G.,Chaikalis, S.,Kanellopoulos, T.,Lagaria, A.,Zachioti, P.,Gogou, A. (2020) . Seasonal variations of biochemical and optical properties, physical dynamics and N stable isotopic composition in three northeastern Mediterranean basins (Aegean, Cretan and Ionian Seas). Deep-Sea Research Part II, Vol. 171, 104704, Elsevier, Kidlington. DOI: https://doi.org/10.1016/j.dsr2.2019.104704 .
Bratek, A.,Beusekom, J.,Neumann, A.,Sanders, T.,Friedrich, J.,Emeis, K.,Dähnke, K. (2020) . Spatial variations in sedimentary N-transformation rates in the North Sea (German Bight). Biogeosciences, Vol. 17, 10, 2839-2851, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-17-2839-2020 . OPEN ACCESS
Bratek, A.,Emeis, K.,Sanders, T.,Wankel, S.,Struck, U.,Möbius, J.,Dähnke, K. (2020) . Nitrate sources and the effect of land cover on the isotopic composition of nitrate in the catchment of the Rhône River. Isotopes in Environmental and Health Studies, Vol. 56, 1, 14-35, Taylor & Francis, London. DOI: https://doi.org/10.1080/10256016.2020.1723580 .

Harms, N.,Lahajnar, N.,Gaye, B.,Rixen, T.,Dähnke, K.,Ankele, M.,Schwarz-Schampera, U.,Emeis, K. (2019) . Nutrient distribution and nitrogen and oxygen isotopic compositionof nitrate in water masses of the subtropical southern Indian Ocean. Biogeosciences, Vol. 16, 13, 2715-2732, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-16-2715-2019 . OPEN ACCESS

Sanders, T.,Schoel, A.,Daehnke, K. (2018) . Hot spots of nitrification in the Elbe Estuary and their impact on nitrate regeneration. Estuaries and Coasts, Vol. 41, 1, 128-138, Springer, New York. DOI: https://doi.org/10.1007/s12237-017-0264-8 .
Ritz, S.,Daehnke, K.,Fischer, H. (2018) . Open-channel measurement of denitrification in a large lowland river. Aquatic Sciences / Research Across Boundaries, Vol. 80, 11, Springer / Birkhaeuser, Basel. DOI: https://doi.org/10.1007/s00027-017-0560-1 .
Brase, L.,Sanders, T.,Daehnke, K. (2018) . Anthropogenic changes of nitrogen loads in a small river: external nutrient sources vs. internal turnover processes. Isotopes in Environmental and Health Studies, Vol. 54, 2, 168-184, Taylor & Francis, London. DOI: https://doi.org/10.1080/10256016.2018.1428580 . OPEN ACCESS

Brase, L.,Bange, H.W.,Lendt, R.,Sanders, T.,Daehnke, K. (2017) . High Resolution Measurements of Nitrous Oxide (N2O) in the Elbe Estuary. Frontiers in Marine Science, Vol. 4, 162, Frontiers Media, Lausanne. DOI: https://doi.org/10.3389/fmars.2017.00162 . OPEN ACCESS
Jacob, J.,Nowka, B.,Merten, V.,Sanders, T.,Spieck, E.,Daehnke, K. (2017) . Oxidation kinetics and inverse isotope effect of marine nitrite-oxidizing isolates. Aquatic Microbial Ecology, Vol. 80, 3, 289-300, Inter-Research, Oldendorf. DOI: https://doi.org/10.3354/ame01859 . OPEN ACCESS

Daehnke, K.,Thamdrup, B. (2016) . Isotope fractionation and isotope decoupling during anammox and denitrification in marine sediments. Limnology and Oceanography, Vol. 61, 2, 610-624, ASLO, Waco, TX. DOI: https://doi.org/10.1002/lno.10237 .
Jacob, J.,Sanders, T.,Daehnke, K. (2016) . Nitrite consumption and associated isotope changes during a river flood event. Biogeosciences, Vol. 13, 19, 5649-5659, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-13-5649-2016 . OPEN ACCESS
Mbaye, M.,Gaye, A.,Spitzy, A.,Dähnke, K.,Afouda, A.,Gaye, B. (2016) . Seasonal and spatial variation in suspended matter, organic carbon, nitrogen, and nutrient concentrations of the Senegal River in West Africa. Limnologica, Vol. 57, 1-13, Elsevier, Amsterdam. DOI: https://doi.org/10.1016/j.limno.2015.12.003 .

Beyn, F.,Matthias, V.,Aulinger, A.,Daehnke, K. (2015) . Do N-isotopes in atmospheric nitrate deposition reflect air pollution levels?. Atmospheric Environment, Vol. 107, 281-288, Elsevier. DOI: https://doi.org/10.1016/j.atmosenv.2015.02.057 . OPEN ACCESS
Moebius, J.,Daehnke, K. (2015) . Nitrate drawdown and its unexpected isotope effect in the Danube estuarine transition zone. Limnology and Oceanography, Vol. 60, 3, 1008-1019, ASLO, Waco, TX. DOI: https://doi.org/10.1002/lno.10068 .

Beyn, F.,Matthias, V.,Daehnke, K. (2014) . Changes in atmospheric nitrate deposition in Germany – An isotopic perspective. Environmental Pollution, Vol. 194, 1-10, Elsevier. DOI: https://doi.org/10.1016/j.envpol.2014.06.043 . OPEN ACCESS

Dähnke, K.,Thamdrup, B. (2013) . Nitrogen isotope dynamics and fractionation during sedimentary denitrification in Boknis Eck, Baltic Sea. Biogeosciences, Vol. 10, 5, 3079-3088, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-10-3079-2013 . OPEN ACCESS

Dähnke, K.,Moneta, A.,Veuger, B.,Soetaert, K.,Middelburg, J.J. (2012) . Balance of assimilative and dissimilative nitrogen processes in a diatom-rich tidal flat sediment. Biogeosciences, Vol. 9, 10, 4059-4070, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-9-4059-2012 . OPEN ACCESS

Schlarbaum, T.,Daehnke, K.,Emeis, K. (2011) . Dissolved and particulate reactive nitrogen in the Elbe River/NW Europe: a 2-yr N-isotope study. Biogeosciences, Vol. 8, 12, 3519-3530, EGU - Copernicus Publication, Katlenburg-Lindau. DOI: https://doi.org/10.5194/bg-8-3519-2011 . OPEN ACCESS

Schlarbaum, T.,Daehnke, K.,Emeis, K. (2010) . Turnover of combined dissolved organic nitrogen and ammonium in the Elbe estuary/NW Europe: Results of nitrogen isotope investigations. Marine Chemistry, Vol. 119, 1-4, 91-107, Elsevier. DOI: https://doi.org/10.1016/j.marchem.2009.12.007 .
Daehnke, K.,Emeis, K.,Johannsen, A.,Nagel, B. (2010) . Stable isotope composition and turnover of nitrate in the German Bight. Marine Ecology - Progress Series, Vol. 408, 7-18, Inter-Research, Oldendorf / Luhe. DOI: https://doi.org/10.3354/meps08558 .

Daehnke, K.,Bahlmann, E.,Emeis, K.-C. (2008) . A nitrate sink in estuaries? An assessment by means of stable nitrate isotopes in the Elbe estuary. Limnology and Oceanography, Vol. 53, 4, 1504-1511, ASLO, Waco, TX.
Johannsen, A.,Daehnke, K.,Emeis, K. (2008) . Isotopic composition of nitrate in five German rivers discharging into the North Sea. Organic Geochemistry, Vol. 39, 12, 1678-1689, Pergamon Press, Oxford. DOI: https://doi.org/10.1016/j.orggeochem.2008.03.004 .

Sanders, T.,Schöl, A.,Dähnke, K. (2017) . Hot Spots of Nitrification in the Elbe Estuary and Their Impact on Nitrate Regeneration. Estuaries and Coasts. Springer, New York. DOI: https://doi.org/10.1007/s12237-017-0264-8 .

Gaye, B.,Nagel, B.,Dähnke, K.,Rixen, T.,Lahajnar, N.,Emeis, K.-C. (2013) . Amino acid composition and δ15N of suspended matter in the Arabian Sea: implications for organic matter sources and degradation. Biogeosciences, Vol. 10, 7689-7702, EGU - Copernicus Publications, Katlenburg-Lindau.

Gaye, B.,Nagel, B.,Dähnke, K.,Rixen, T.,Emeis, K.-C. (2013) . Evidence of coupled denitrification and nitrification in the ODZ of the Arabian Sea from paired stable isotopes of nitrate and nitrite. Global Biogeochemical Cycles, Vol. 27, 1-13, AGU - Wiley. DOI: https://doi.org/10.1002/2011GB004115 .

Deek, A.,Dähnke, K.,van Beusekom, J.,Meyer, S.,Voss, M.,Emeis, K.-C. (2013) . N2 Fluxes in sediments of the Elbe estuary and adjacent coastal zones. Marine Ecology Progress Series, Vol. 493, 9-21, Inter-Research, Oldendorf/Luhe. DOI: https://doi.org/10.3354/meps10474 .

Emeis, K.-C.,Mara, P.,Schlarbaum, T.,Möbius, J.,Dähnke, K.,Struck, U.,Mihalopoulos, N.,Krom, M. (2010) . External N inputs and internal N cycling traced by isotope ratios of nitrate, dissolved reduced nitrogen, and particulate nitrogen in the eastern Mediterranean Sea. Journal of Geophysical Research: Biogeosciences, Vol. 115, G04041, AGU - Wiley. DOI: https://doi.org/10.1029/2009JG001214 .

Serna, A.,Pätsch, J.,Dähnke, K.,Wiesner, M.G.,Hass, H.C.,Zeiler, M.,Hebbeln, D.,Emeis, K.-C. (2010) . History of anthropogenic nitrogen input to the German Bight/SE North Sea as reflected by nitrogen isotopes in surface sediments, sediment cores and hindcast models. Continental Shelf Research, Vol. 30, 15, 1626-1638, Elsevier, Kidlington. DOI: https://doi.org/10.1016/j.csr.2010.06.012 .

Pätsch, J.,Serna, A.,Dähnke, K.,Schlarbaum, T.,Emeis, K.-C. (2010) . Nitrogen cycling in the German Bight (SE North Sea) – clues from modelling stable nitrogen isotopes. Continental Shelf Research, Vol. 30, 2, 203-213, Elsevier, Kidlington. DOI: https://doi.org/10.1016/j.csr.2009.11.003 .

Mara, P.,Mihalopoulos, N.,Gogou, A.,Dähnke, K.,Schlarbaum, T.,Emeis, K.-C.,Krom, M. (2009) . Isotopic composition of nitrate in wet and dry atmospheric deposition on Crete in the eastern Mediterranean Sea. Global Biogeochemical Cycles, Vol. 23, GB4002, AGU - Wiley. DOI: https://doi.org/10.1029/2008GB003395 .

Dähnke, K.,Serna, A.,Blanz, T.,Emeis, K.-C. (2008) . Sub-recent nitrogen-isotope trends in sediments from Skagerrak (North Sea) and Kattegat: Changes in N-budgets and N-sources? Marine Geology, Vol. 253, 92-98, Elsevier, Kidlington. DOI: https://doi.org/10.1016/j.margeo.2008.04.007 .

since Mar 2017: Head of Department "Aquatic Nutrient Cycles", Institute of Carbon Cycles, at the Helmholtz Center Hereon, Geesthacht, Germany.
Apr 2011: Leader of the Helmholtz-Young Investigators Group “Sources, sinks and internal cycling of nitrogen in coastal waters – Identification of key processes using stable N isotopes“ at Helmholtz Zentrum Geesthacht
Mar 2009 - Feb 2011: Guest Researcher at NordCEE, Institute of Biology, University of Southern Denmark
Sep 2008 – Feb 2009: Post-doctoral researcher at the Netherlands Institute for Ecology (NIOO-KNAW), Department of Ecosystem Studies, Yerseke, Netherlands
Jul 2008: PhD (Dr. rer.nat), University of Hamburg, Department of Geosciences
Thesis: Nitrogen cycling in the southern North Sea – assessment by stable isotopes