People - IOW

S2B People

©Rövensthal	Development of new technologies and approaches to observe complex, interdisciplinary processes from the coast to the deep ocean.
Daniel Carlson (Co-Lead)	Physical Oceanographer, Remote Sensing and Marine Technology
©Rövensthal	Interplay of coastal wave-current dynamics and stratification. Role of physical transport and mixing processes for biogeochemical cycles (oxygen, nutrients, and particles) in shallow-water systems.
Peter Holtermann (Co-Lead)	Physical Oceanographer, Physical transport & mixing, Field measurements
©Rövensthal	My research interests lie in studying the marine nitrogen cycle and other element cycles using modern methods of stable isotope biogeochemistry. The focus is on coastal turnover processes and the quantification of rates such as nitrogen fixation, denitrification, nitrate uptake, and DNRA to better understand the impact of eutrophication on coastal environments. Close collaboration with other research groups and across different research areas broadens our understanding, which is why joint field and laboratory work is conducted. In recent years, in particular, research on the so-called coastal filter has been the focus of work at Nienhagen, Rostock, and also in the waters of the Amazon estuary.
Maren Voss (Co-Lead)	Marine Biogeochemist
	My research operates at the interface of biophysics, microbiology, and biogeochemistry, aiming to understand how physical transport processes interact with microbial activity to regulate carbon and nutrient transformations in marine systems. I combine numerical modeling, in situ observations using self-developed platforms such as the benthic observatory LanceALot and the S2B Lander, and controlled laboratory experiments in flow-through reactors and microfluidic systems to mechanistically resolve these processes across scales. A central focus of my work is carbon and nitrogen cycling in porous media, including marine aggregates and coastal sediments.
Soeren Ahmerkamp	Marine Biophysics und Biogeochemistry
	Estuarine and coastal ocean processes with focus on mixing and exchange flow in estuaries. Development of coastal ocean models including turbulence closures and accurate numerical schemes. Studies of water mass transformations and sediment transport.
Hans Burchard	Physical Oceanographer
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Manita Chouksey	Physical Oceanographer
©Rövensthal	My research addresses the effects of climate variability on the dynamics of zooplankton and focuses particularly but not exclusively on copepods of the Baltic Sea. Using various approaches ranging from small-scale laboratory studies to the long-term monitoring of zooplankton, I aim to characterize life history patterns and to quantitatively assess how abiotic and biotic factors control the spatio-temporal variation in zooplankton. With the goal to provide a better mechanistic understanding, I address the role of bentho-pelagic coupling in the recruitment of copepods and of physiological adaptations to explain distribution patterns and population dynamics across the land-ocean interface.
Jörg Dutz	Marine Biologist
©Rövensthal	I investigate marine geologic processes and their interplay with climate and anthropogenic stressors. One of the central topics is the integrity of the Baltic seafloor in the Anthropocene. To derive information from the seafloor I use hydroacoustic data in conjunction with visual observations and sedimentary and geochemical archives.
Jacob Geersen	Marine Geologist
©Rövensthal	Numerical modelling of coastal and marginal seas (especially the Baltic Sea), focusing on circulation, mixing, turbulence, and saltwater intrusion. Lagrangian particle dynamics and transport processes, including pollutants, sediments, and ecological tracers. Coupling physical ocean processes with environmental impacts such as oxygen variability, sea level extremes, coastal hazards, and ecosystem dynamics, increasingly using machine-learning-based prediction methods.
Ulf Gräwe	Physical Oceanographer
	I study how microbial activity shapes element cycling in marine sediments and redox stratified water columns. Within the S2B, my work focuses on phosphorus dynamics at the sediment/water interface during short term and seasonal hypoxia in coastal environments of the German Baltic Sea. To investigate the underlying processes, I combine geochemical analyses, autonomous phosphate sensing, laboratory experiments, microbial cultivation, and molecular approaches.
Jan Henkel	Marine Geomicrobiologist
	My research focuses on the adaptation of specific brackish bacterial species to fluctuating salinity levels by combining metagenomic community profiling with the isolation of key species. Through time-series analysis, I investigate how shallow-water microbial populations respond to shifting environmental conditions and extreme events, with a particular emphasis on interactions with macroorganisms (such as seagrass) and the dynamics of pathogenic bacteria.
Daniel Herlemann	Aquatic microbiology
©Rövensthal	Method development for and analaysis of organic trace substances in aquatic systems using chromatographic-mass spectrometric analytical methods with focus on legacy and emerging contaminants.
Marion Kanwischer	Coastal & marine environmental researcher, organochemical analysis
	Design, development, and maintenance of coastal scientific time-series monitoring stations, including instrumentation, data management, communications, and long-term operational support.
Bennet Krebs	Development Engineer
©Rövensthal	Investigates the role of microorganisms in marine and brackish coastal systems subject to anthropogenic influence, with a particular focus on pathogenic bacteria.
Matthias Labrenz	Marine Biologist
	I am an ecosystem modeller investigating biogeochemical processes in shallow coastal waters. My research focuses on how coastal processes influence nutrient cycling, oxygen dynamics, and ecosystem functioning from coastal regions to deeper basins. Using coupled physical–biogeochemical models, I study how coastal filter processes transform, retain, and remove nitrogen and phosphorus along the land–sea continuum.
Anju Mallissery	Physical Oceanographer, Numerical Modeller
©Rövensthal	UVC Anti-fouling Mooring design Data validation
Robert Mars	Engineer
	I investigate the biogeochemical cycling of climate-relevant trace gases such as nitrous oxide (N₂O), methane (CH₄), carbon dioxide (CO2) and carbon monoxide (CO). Within the S2B, I am particularly interested on the exchange fluxes of these gases across the sediment- water (ice)-air interfaces, and how their spatio-temporal variability sets the overall coastal radiative balance.
Damian Leonardo Arevalo Martinez	Chemical Oceanographer
©Rövensthal	Optical analysis of dissolved organic matter dynamics using both lab-based and in situ methods. My focus is on compositional and concentration dynamics across different timescales and the implications of these dynamics for the photochemical fate of contaminants of emerging concern.
Jann Müller	Chemical Oceanographer
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Michael Naumann	Physical Oceanographer
	Design, development and implementation of technical solutions for a flexible and innovative acquisition of measurement data in shallow waters, as well as the handling and online provision of such data.
Sebastian Neubert	Development Engineer
©Rövensthal	Concentration and composition dynamics of dissolved and particulate organic matter, especially under anthropogenic pressure. Biogeochemical C-cycling and mixing processes from the land-ocean-interface to the open ocean.
Helena Osterholz	Marine Chemist
	Nutrient transports, Tagging methods, Eulerian-Lagrangian Modelling, Model uncertainty quantification.
Hagen Radtke	Marine BGC Modeller
	add your work
Gregor Rehder	Marine Chemist
	Electronics engineer with long term experience in marine measurement systems. Development of low power data logging systems for shallow water applications. Quality control of measurement data including sensor calibration and data validation.
Martin Sass	Development Engineer
	Phytoplankton community dynamics in shallow, coastal waters. Diversity and distribution of harmful algal species in the Baltic Sea. Establishment of an autonomous sampling device for phytoplankton, i.e. an Imaging Flow Cytobot, and development of AI-based work flows for taxonomic identification.
Ingrid Sassenhagen	Marine Biologist , Phytoplankton Ecology
	My research focuses on the quantification of greenhouse gases, particularly nitrous oxide, including its concentrations and fluxes across the sediment–water–air interfaces. I aim to achieve a quantitative understanding of how physical changes at the sediment–water interface influence nitrous oxide production.
Marcel Sommer	Marine Chemist
©Rövensthal	I study the ecophysiology of sulfide-oxidizing bacteria, especially Beggiatoaceae and magnetotactic bacteria. My work focuses on their ecological niches, behavior, and potential to limit sulfide accumulation in marine sediments. Using laboratory experiments and cultivation-based approaches, I investigate how these organisms contribute to sulfur cycling and interact with phosphorus dynamics.
Heide Schulz-Vogt	Marine Biologist
©Rövensthal	Applied coastal water research with a focus on assessing benefits provided by coastal ecosystems as well as impacts of human activities or measures on these ecosystems. Interested in supporting coastal and marine policy implementation by applying model results to practical research questions.
Miriam von Thenen	Coastal and marine environmental researcher
©Rövensthal	Investigating oxygen transport, mixing and turnover in shallow, stratified waters, with coastal areas near Rostock serving as a case study.
Oliver Thiele	Physical Oceanographer