Marine sediments exposed to episodical hypoxia (Boknis Eck)

Boknis Eck (BE) is located in the southwestern Baltic Sea at the entrance to the Eckernförde Bay. One special characteristic of this site is the seasonal change between oxic and hypoxic / sporadic anoxic conditions in the deeper water column. This dynamic in oxygen levels makes Boknis Eck an ideal model site to study the impact of deoxygenation on microbial activity and the resulting changes in metabolic turnover rates in the natural habitat.

For this purpose, we carry out incubation experiments in the laboratory, but also use our Mini Chamber Lander to perform comparative in situ experiments. Microbiological turnover rates are monitored and molecular biological transcriptional analyses accompany our experiments. Here, our intention is to better understand how microbially mediated metabolic processes impact ecosystem functioning. The globally increasing expansion of oxygen minimum zones highlight the need for such studies, allowing better prediction of possible feedbacks and forecasting microbially mediated element cycling in the future oceans.


Dr. Nicole Adam-Beyer ∙ Dr. Stefanie Böhnke-Brandt ∙ Rebecca Bährle


Geomicrobiology Home

  • Head of the group:


    Prof. Dr. Mirjam Perner

    GEOMAR | Helmholtz-Centre for Ocean Research Kiel
    Eastshore Campus, Building 12
    Wischhofstrasse 1-3
    D-24148 Kiel
    Phone: ++49-431 600-2837
    Fax:++49-431 600-2941

    Personal Assistant:

    Marion Liebetrau
    Phone: ++49-431 600-2847
    Fax: ++49-431 600-2941


  • !!! Bachelor and Master Theses !!!
    There are numerous exciting projects available in our working group raising questions that can also be investigated in the context of bachelor and master theses. Feel free to contact us and find a suitable topic for your thesis together with us!