Department of Biogeochemistry
Research in the Department of Biogeochemistry led by Prof. Dr. Marcel Kuypers focuses on microbiological and geochemical processes that control bioactive element cycling in the marine environment. The researchers employ geochemical, microbiological, modeling, molecular, and single-cell techniques to study the environmental regulation of these processes and their effects on the global biogeochemical cycles. They aim to gain fundamental insights into microbially mediated processes ultimately affecting ocean chemistry, biology and our climate and provide vital input for models predicting potential future changes resulting from human activities.
Department of Molecular Ecology
Research in the Department of Molecular Ecology led by Prof. Dr. Rudolf Amann covers various ecosystems, including benthic habitats - from coastal permeable sediments to deep sea hydrothermal vents and seeps – as well as pelagic environments – from the shelf to the open ocean. A special focus of this group lies on the North Sea and the Wadden Sea.
Department of Symbiosis
The Department of Symbiosis, headed by Prof. Dr. Nicole Dubilier, studies the biology and ecology of tight associations between bacteria and eukaryotes. The main emphasis lies on marine invertebrates from chemosynthetic environments such as sulfide-rich coastal sediments, vents and seeps.
High-resolution studies of chemical microenvironments and metabolic processes by microsensors
-Development of 1 and 2D microsensing systems (electrochemical and fiber-optical microsensors and planar optodes.
The microsensor group headed by Dr. Dirk de Beer develops microsensors and applies these tools to answer scientific questions. The sensors are used in various research themes: studies of O, S and C cycling in microbial mats; the relation between complexity and stability of microbial ecosystems (mats); anoxygenic photosynthesis in modelsystems; calcification and respiration in deep-sea sediments; the N-cycle in freshwater sediments; the N and S cycle in biofilms.
Max Planck Research Group Microbial Metabolism
The Microbial Metabolism Group, headed by Tristan Wagner, aims to understand, at the molecular level, how methanogens are surviving and growing in extreme environments. How do they generate methane from different sources of carbon so efficiently? How do they convert minerals into the elementary bricks of life? And how do they protect themselves against stresses from their natural environment?
Max Planck Research Group Archaeal Virology
HGF MPG Joint Research Group for Deep-Sea Ecology and Technology
The HGF MPG Joint Research Group for Deep-Sea Ecology and Technology, headed by Prof. Dr. Antje Boetius, focuses on the physical, chemical, geological, hydrological, and biological characteristics of the diverse microbial habitats. The goal of our research on “microbial habitats” is to understand niche formation, and to investigate regulatory mechanisms for the occurrence and distribution of microbial populations. This requires the development of a variety of in situ techniques, as well as experimental strategies to quantify the nature and variability of the habitat on different temporal and spatial scales.
This Joint Research Group combines the expertise of the Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research (AWI) in Bremerhaven to conduct research in polar environments and to carry out long-term observations with MPIMM’s competence in the area of marine microbiology, the development of new molecular-biological methodologies, and in situ sensors.
MARUM MPG Bridge Group Marine Glycobiology
The MARUM MPG Bridge Group Marine Glycobiology, headed by Dr. Jan-Hendrik Hehemann, focuses on certain algal sugars, so called polysaccharides. These polysaccharides are very important in the marine carbon cycle. The massively influence how much carbon is stored in the ocean. Despite their relevance the structures of algal polysaccharides and their recycling by marine microbes remain a mystery. To shed light on this black box of the marine carbon cycle Hehemann and his group study the functional evolution of the bacterial enzymatic machines and how they process algal polysaccharides in the ocean.
ICBM-MPI Bridge Group Marine Geochemistry
The ICBM-MPI Bridge Group, headed by Prof. Dr. Thorsten Dittmar, is a cooperation between MPIMM and the Institute for Chemistry and Biology of the Marine Environment (ICBM, University of Oldenburg). It aims at a better understanding of global element cycles using molecular tools. A special focus lies on dissolved organic matter (DOM). Structure-function-relationships for DOM and other organic matter pools are required to understand the earth’s past and future. Recent progress in analytical chemistry has allowed the characterisation of DOM at the molecular level in unprecedented detail, allowing for new insights into its source and history.
Max Planck Research Group Marine Isotope Geochemistry
The Max Planck Research Group Marine Isotope Geochemistry, headed by Dr. Katharina Pahnke-May, is focused on the understanding of past and present processes and changes in the ocean and the climate system. Particular interest of this collaboration between MPIMM and the Institute for Chemistry and Biology of the Marine Environment (ICBM, University of Oldenburg) lies in trace elements and their isotopes in the ocean, as well as their role as tracers of present and past element input and fluxes, geochemical processes, internal cycling, and past ocean circulation changes.
Department of Microbiology
The Department of Microbiology, headed by Prof. Dr. Friedrich Widdel, investigates the physiology and diversity of aquatic bacteria from the cycles of carbon, nitrogen, sulfur and iron. Investigations usually include the isolation of bacteria and their study under defined conditions in the laboratory. Characterisation of enrichment and pure cultures is often combined with the analysis of ribosomal nucleic acids, which is carried out in collaboration with the Department of Molecular Ecology. One major project is the study of the anaerobic degradation of long-lived natural products such as hydrocarbons, mostly by denitrifying and sulfate-reducing bacteria. Furthermore, the physiology of naturally abundant forms of sulfur-oxidizing and sulfate-reducing bacteria is of interest.