Royal Netherlands Institute for Sea Research
Royal Netherlands
Institute for Sea Research
Phone number
+31 (0)113 577 472
Guest researcher
Universiteit Gent
Karline Soetaert

Dr. Tanja Stratmann

Guest researcher


  • Pulse-chase experiments with stable isotopes (SI)
  • Compound-specific isotope analysis (fatty acids, amino acids)
  • Linear inverse modelling of benthic food-webs
  • Absorbance and fluorescence measurements of DOM (CDOM, FDOM)
  • Annotation of still images and processing of video material

(photo courtesy: ROV Kiel 6000, Geomar, Kiel, Germany)

Research interests

  •            Carbon cycling in polar waters and sea ice
  •       Structure and stability of deep-sea food webs
  •       Nutrient and oxygen fluxes of benthic megafauna (e.g. Porifera, Holothuroidea)
  •       Environmental impact of deep-sea mining
  •       Deep-sea diversity and ecology

Linked news

Thursday 27 September 2018
Diepzeemijnbouw veroorzaakt langdurige schade aan het ecosysteem
[English below Dutch] Het winnen van mangaanknollen in de diepzee levert langdurige milieuschade op. Dat concludeert NIOZ-onderzoekster Tanja Stratmann in haar proefschrift 'Benthic ecosystem response to polymetallic nodule extraction in the deep…
Tuesday 06 June 2017
Short-term effects of deep-sea mining waste on microbes and meiofauna at the seafloor
The addition of waste particles from deep-sea mining (iron ore mine tailings) affected the activity of nematodes and the microbial community in microcosm experiments with natural sediments collected at 200m depth in the Hardanger fjord (Norway).…

NIOZ publications

  • 2018
    Brown, A.; Hauton, C.; Stratmann, T.; Sweetman, A.; Van Oevelen, D.; Jones, D.O.B. (2018). Metabolic rates are significantly lower in abyssal Holothuroidea than in shallow-water Holothuroidea. Royal Society Open Science 5: 172162.
    Stratmann, T. (2018). Benthic ecosystem response to polymetallic nodule extraction in the deep sea. PhD Thesis. Ghent University: Ghent. ISBN 9789082561159. XXV, 351 pp.
    Stratmann, T.; Lins, L.; Purser, A.; Rodrigues, C.F.; Ravara, A.; Cunha, M.R.; Simon-Lledó, E.; Jones, D.O.B.; Sweetman, A.K.; Köser, K.; Van Oevelen, D. (2018). Abyssal plain faunal carbon flows remain depressed 26 years after a simulated deep-sea mining disturbance. Biogeosciences 15(13): 4131-4145.
    Stratmann, T.; Mevenkamp, L.; Sweetman, A.K.; Vanreusel, A.; van Oevelen, D. (2018). Has phytodetritus processing by an abyssal soft-sediment community recovered 26 years after an experimental disturbance? Front. Mar. Sci. 5: 59.
    Read more
    Stratmann, T.; Voorsmit, I.; Gebruk, A.; Brown, A.; Purser, A.; Marcon, Y.; Sweetman, A.K.; Jones, D.O.B.; Van Oevelen, D. (2018). Recovery of Holothuroidea population density, community composition, and respiration activity after a deep-sea disturbance experiment. Limnol. Oceanogr. 63(5): 2140-2153.
    Sweetman, A.K.; Smith, C.R.; Shulse, C.N.; Maillot, B.; Lindh, M.; Church, M.J.; Meyer, K.S.; van Oevelen, D.; Stratmann, T.; Gooday, A.J. (2018). Key role of bacteria in the short-term cycling of carbon at the abyssal seafloor in a low particulate organic carbon flux region of the eastern Pacific Ocean. Limnol. Oceanogr. 64(2): 694-713.
  • 2017
    Jones, D.O.B.; Kaiser, S.; Sweetman, A.K.; Smith, C.R.; Menot, L.; Vink, A.; Trueblood, D.; Greinert, J.; Billett, D.S.M.; Martinez Arbizu, P.; Radziejewska, T.; Singh, R.; Ingole, B.; Stratmann, T.; Simon-Lledó, E.; Durden, J.M.; Clack, M.R. (2017). Biological responses to disturbance from simulated deep-sea polymetallic nodulemining. PLoS One 12(2): e0171750.
    Mevenkamp, L.; Stratmann, T.; Guilini, K.; Moodley, L.; Van Oevelen, D.; Vanreusel, A.; Westerlund, S.; Sweetman, A.K. (2017). Impaired short-term functioning of a benthic community from a deep Norwegian Fjord following deposition of mine tailings and sediments. Front. Mar. Sci. 4(169): 1-16.
    Stratmann, T.; Lund-Hansen, L.C.; Sorrell, B.K.; Markager, S. (2017). Concentrations of organic and inorganic bound nutrients and chlorophyll a in the Eurasian Basin, Arctic Ocean, early autumn 2012. Regional Studies in Marine Science 9: 69-75.
  • 2015
    Lund-Hansen, L.C.; Markager, S.; Hancke, K.; Stratmann, T.; Rysgaard, S.; Ramløv, H.; Sorrell, B.K. (2015). Effects of sea-ice light attenuation and CDOM absorption in the water below the Eurasian sector of central Arctic Ocean (>88°N). Pol. Res. 34: 23978.

Linked projects

MIDAS_Managing Impacts of Deep-seA reSource exploitation
Dick van Oevelen
European Community
Project duration
1 Nov 2013 - 16 Feb 2018
MIDAS_Managing Impacts of Deep-seA reSource exploitation
Dick van Oevelen
European Community
Project duration
1 Nov 2013 - 16 Feb 2018
Role of deep-sea sponges on carbon and nitrogen flows in deep-sea food webs
Tanja Stratmann
The Royal Netherlands Academy of Arts and Sciences
Project duration
1 Jan 2017 - 30 Jun 2017