• Trace metal and nutrient dynamics in pore waters and the open water column of tidal flat and beach systems 
• Supervision of longterm in situ nutrient measurements on a monitoring station in the backbarrier area of Spiekeroog Island 

2004-2009: Research Group 'BioGeoChemistry of Tidal Flats' (German Research Foundation)

2009-2012: Natural and anthropogenic dynamics of nutrients, heavy metals, organic pollutants, and tracer substances in the Jade Bay (Volkswagen Foundation, Ministry for Science and Culture of Lower Saxony)

since 2016: Assessment of ground- and porewater-derived nutrient fluxes into the German North Sea - Is there a "Barrier Island Mass Effect (BIME)? (Ministry for Science and Culture of Lower Saxony)

Grünenbaum, N., Ahrens, J., Beck, M., Gilfedder, B.S., Greskowiak, J., Kossack, M., Massmann, G. (2020) A multi-method approach for quantification of in- and exfiltration rates from the subterranean estuary of a high energy beach. Frontiers in Earth Science 8, 571310.

Degenhardt, J., Dlugosch, L., Ahrens, J., Beck, M., Waksa, H., Engelen, B. (2020) Seasonal dynamics of microbial diversity at a sandy high energy beach reveal a resilient core community. Frontiers in Marine Science 7, 573570.

Ahrens, J., Beck, M., Marchant, H.K., Ahmerkamp, S., Schnetger, B., Brumsack, H.-J. (2020) Seasonality of organic matter degradation regulates nutrient and metal net fluxes in a high energy sandy beach. Journal of Geochphysical Research: Biogeosciences 125, e2019JG005399.

Beck, M., Dellwig, O., Schnetger, B., Riedel, T., Brumsack, H.-J. (2020) Manganese dynamics in tidal basins of the Wadden Sea: Spatial/seasonal patterns and budget estimates. Marine Chemistry 225, 103847.

Oehler, T., Tamborski, J., Rahman, S., Moosdorf, N., Ahrens, J., Mori, C., Neuholz, R., Schnetger, B., Beck, M. (2019) DSi as a tracer for submarine groundwater discharge. Frontiers in Marine Science 6, 563.

Waska, H., Greskowiak, J., Ahrens, J., Beck, M., Ahmerkamp, S., Böning, P., Brumsack, H.-J., Degenhardt, J., Ehlert, C., Engelen, E., Grünenbaum, N., Holtappels, M., Pahnke, K., Marchant, H.K., Massmann, G., Meier, D., Schnetger, B., Schwalfenberg, K., Simon, H., Vandieken, V., Zieliniski, O., Dittmar, T. (2019) Pore water chemistry in the inter-tidal zone of a high energy beach. Frontiers in Marine Science 6, 154.

Seibert, S.L., Holt, T., Reckhardt, A., Ahrens, J., Beck, M., Pollmann, T., Giani, L., Waska, H., Böttcher, M.E., Greskowiak, J., Massmann, G. (2018) Hydrochemical evolution of a freshwater lens below a barrier island (Spiekeroog, Germany): The role of carbonate mineral reactions, cation exchange and redox processes. Applied Geochemistry 92, 196-208.

Böning, P., Schnetger, B., Beck, M., Brumsack, H.-J. (2018) Thallium dynamics in the southern North Sea. Geochimica et Cosmochimica Acta 227, 143-155.

Beck, M., Reckhardt, A., Amelsberg, J., Bartholomä, A., Brumsack, H.-J., Cypionka, H., Dittmar, T., Engelen, B., Greskowiak, J., Hillebrand, H., Holtappels, M., Neuholz, R., Köster, J., Kuypers, M.M.M, Massmann, G., Meier, D., Niggemann, J., Paffrath, R., Pahnke, K., Rovo, S., Striebel, M., Vandieken, V., Wehrmann, A., Zielinski, O. (2017) The drivers of biogeochemistry in beach ecosystems: A cross-shore transect from the dunes to the low-water line. Marine Chemistry 190, 35-50.

Reckhardt, A., Beck, M., Greskowiak, J., Schnetger, B., Böttcher, M.E., Gehre, M., Brumsack, H.-J. (2017) Cycling of redox-sensitive elements in a sandy subterranean estuary of the southern North Sea. Marine Chemistry 188, 6-17.

Singer, A., Schückel, U., Beck, M., Bleich, O., Brumsack, H.-J., Freund, H., Geimecke, C., Lettmann, K.A., Millat, G., Staneva, J., Vanselow, A., Westphal, H., Wolff, J.-O., Wurpts, A., Kröncke, I. (2016) Small-scale benthos distribution modelling in a North Sea tidal basin in response to climatic and environmental changes (1970s-2009). Marine Ecology Progress Series 551, 13-30.

Santos, I.R., Beck, M., Brumsack, H.-J., Maher, D.T., Dittmar, T., Waska, H., Schnetger, B (2015) Porewater exchange as a driver of carbon dynamics across a terrestrial-marine transect: Insights from coupled ²²²Rn and pCo2 observations in the German Wadden Sea. Marine Chemistry 171, 10-20.

Seidel, M., Beck, M., Greskowiak, J., Riedel, T., Waska, H., Suryaputra, I G.N.A., Schnetger, B., Niggemann, J., Simon, M., Dittmar, T. (2015) Benthic-pelagic coupling of nutrients and dissolved organic matter composition in an intertidal sandy beach. Marine Chemistry 176, 150-163.

Reckhardt, A., Beck, M., Seidel, M., Riedel, T., Wehrmann, A., Bartholomä, A., Schnetger, B., Dittmar, T., Brumsack, H.-J. (2015) Carbon, nutrient and trace metal cycling in sandy sediments: A comparison of high-energy beaches and backbarrier tidal flats. Estuarine and Coastal Shelf Science 159, 1-14.

Schückel, U., Beck, M., Kröncke, I. (2015) Macrofauna communities of tidal channels in Jade Bay (German Wadden Sea): spatial patterns, relationships with environmental characteristics, and comparative aspects. Marine Biodiversity 45, 841-855.

Meier, S., Muijsers, F., Beck, M., Badewien, T.H., Hillebrand, H. (2015) Dominance o the non-indigenous diatom Mediopyxis helysia in Wadden Sea phytoplankton can be linked to broad tolerance to different Si and N supplies. Journal of Sea Research 95, 36-44.

Seidel, M., Beck, M., Riedel, T., Waska, H., Suryaputra, I G.N.A., Schnetger, B., Niggemann, J., Simon, M., Dittmar, T. (2014) Biogeochemistry of dissolved organic matter in an anoxic intertidal creek bank. Geochimica et Cosmochimica Acta 140, 418-434.

Osterholz, H., Simon, H., Beck, M., März, J., Rackebrandt, S., Brumsack, H.-J., Feudel, U., Simon, M. (2014) Impact of diatom growth on trace metal dynamics (Mn, Mo, V, U). Journal of Sea Research 87, 35-45.

Winde, V., Böttcher, M.E., Escher, P., Böning, P., Beck, M., Liebezeit, G., Schneider, B. (2014) Spatial and tidal variations of DI¹³C and aquatic chemistry in a temperate tidal basin during winter time. Journal of Marine Systems 129, 396-404.

Kowalski, N., Dellwig, O., Beck, M., Gräwe, U., Neubert, N., Nägler, T.F., Badewien, T.H., Brumsack, H.-J., van Beusekom, J.E.E., Böttcher, M.E. (2013) Pelagic molybdenum concentration anomalies and the impact of sediment suspension on the molybdenum budget in two tidal systems of the North Sea. Geochimica et Cosmochimica Acta 119, 198-211.

Beck M., Böning P., Schückel U., Stiehl T., Schnetger B., Rullkötter J., Brumsack H.-J. (2013) Consistent assessment of trace metal contamination in surface sediments and suspended particulate matter: A case study from the Jade Bay, NW Germany. Marine Pollution Bulletin 70, 100-111.

Schückel, U., Beck, M., Kröncke, I. (2013) Spatial variability in structural and functional aspects of macrofauna communities and their environmental parameters in the Jade Bay (Wadden Sea Lower Saxony, southern North Sea). Helgoland Marine Research 67(1), 121-136.

Beck, M., Brumsack, H.-J. (2012) Biogeochemical cycles in sediment and water column of the Wadden Sea: The example Spiekeroog Island in a regional context. Ocean and Coastal Management 68, 102-113.

Böning, P., Fröllje, H., Beck, M., Schnetger, B., Brumsack, H.-J. (2012) Underestimation of the authigenic fraction of Cu and Ni in organic-rich sediments. Marine Geology 323-325, 24-28.

Beck, M., Dellwig, O., Fischer, S., Schnetger, B., Brumsack, H.-J. (2012) Trace metal geochemistry of organic carbon-rich watercourses draining the NW German coast. Estuarine, Coastal and Shelf Science 104-105, 66-79.

Gao, H., Matyka, M., Liu, B., Khalili, A., Kostka, J.E., Collins, G., Jansen, S., Holtappels, M., Jensen, M.M., Badewien, T.H., Beck, M., Grunwald, M., de Beer, D., Lavik, G., Kuypers, M.M.M. (2012) Intensive and extensive nitrogen loss from intertidal permeable sediments of the Wadden Sea. Limnology and Oceanography 57(1), 185-198

Kowalski, N., Dellwig, O., Beck, M., Grunwald, M., Dürselen, C.-D., Badewien, T.H., Brumsack, H.-J., van Beusekom, J.E.E., Böttcher, M.E. (2011) A comparative study of manganese dynamics in the water column and sediments of intertidal systems of the North Sea. Estuarine, Coastal and Shelf Science 100, 3-17.

Moore, W.S., Beck, M., Riedel, T., Rutgers van der Loeff, M., Dellwig, O., Shaw, T.J., Schnetger, B., Brumsack, H.-J. Radium-based pore water fluxes of silica, alkalinity, manganese, DOC, and uranium: A decade of studies in the German Wadden Sea. Geochimica et Cosmochimica Acta 75, 6535-6555.

Beck, M., Riedel, T., Graue, J., Köster, J., Kowalski, N., Wu, C.S., Wegener, G., Lipsewers, Y., Freund, H., Böttcher, M.E., Brumsack, H.-J., Cypionka, H., Rullkötter, J., Engelen, B. (2011) Imprint of past and present environmental conditions on microbiology and biogeochemistry of coastal Quaternary sediments. Biogeosciences 8, 55-68.

Riedel, T., Lettmann, K., Beck, M., Schnetger, B., Brumsack, H.-J. (2011) Rates of trace metal and nutrient diagenesis in an intertidal creek bank. Geochimica et Cosmochimica Acta 75, 134-147.

Schückel, U., Schückel, S., Beck, M., Liebezeit, G. (2010) New range expansion of Caprella mutica, Schurin, 1935 (Malacostraca: Caprellidae) to the German coast, North Sea

Grunwald, M., Dellwig, O., Kohlmeier, C., Beck, M., Kotzur, S., Kowalski, N., Liebezeit, G., Brumsack, H.-J. (2010) Nutrient dynamics in a back barrier tidal basin of the Southern North Sea: Time-series, model simulations, and budget estimates. Journal of Sea Research 64, 199-212.

Riedel, T., Lettmann, K., Beck, M., Brumsack, H.-J. (2010) Tidal variations in groundwater storage and associated discharge from an intertidal coastal aquifer. Journal of Geophysical Research 115, C04013.

Beck, M., Köster, J., Engelen, B., Holstein, J.M., Gittel, A., Könneke, M., Riedel, T., Wirtz, K., Cypionka, H., Rullkötter, J., Brumsack, H.-J. (2009) Deep pore water profiles reflect enhanced microbial activity towards tidal flat margins. Ocean Dynamics 59, 371-383.

Kowalski, N., Dellwig, O., Beck, M., Grunwald, M., Kölsch, S., Piepho, M., Riedel, T., Freund, H., Brumsack, H.-J., Böttcher, M.E. (2009) Trace metal dynamics in the water column and pore waters in a temperate tidal system: Response to the fate of algae derived organic matter. Ocean Dynamics 59, 333-350.

Lübben, A., Dellwig, O., Koch, S., Beck, M., Badewien, T.H., Fischer, S., Reuter, R. (2009) Distributions and characteristics of dissolved organic matter in temperate coastal waters, Southern North Sea. Ocean Dynamics 59, 263-275.

Grunwald, M., Dellwig, O., Beck, M., Dippner, J.W., Freund, J., Kohlmeier, C., Schnetger, B., Brumsack, H.-J. (2009) The significance of back barrier tidal flats on the methane concentrations in the southern North Sea: spatial distribution and budgets. Estuarine, Coastal and Shelf Science 81, 445-456.

Kolditz, K., Dellwig, O., Barkowski, J., Beck, M., Freund, H., Brumsack, H.-J. (2009) Salt marsh restoration: Effects of de-embankment on pore water geochemistry. Journal of Coastal Research 256, 1222-1235.

Beck, M., Dellwig, O., Schnetger, B., Brumsack, H.-J. (2008) Cycling of trace metals (Mn, Fe, Mo, U, V, Cr) in deep pore waters of intertidal flat sediments. Geochimica et Cosmochimica Acta 72, 2822-2840.

Beck, M., Dellwig, O., Liebezeit, G., Schnetger, B., Brumsack, H.-J.(2008) Spatial and seasonal variations of sulphate, dissolved organic carbon and nutrients in deep pore waters of intertidal flat sediments. Estuarine, Coastal and Shelf Science 79, 307-316.

Beck, M., Dellwig, O., Holstein, J.M., Grunwald, M., Liebezeit, G., Schnetger, B., Brumsack, H.-J. (2008) Sulphate, dissolved organic carbon, nutrients and terminal metabolic products in deep pore waters of an intertidal flat. Biogeochemistry 89, 221-238.

Beck, M., Dellwig, O., Kolditz, K., Freund, H., Liebezeit, G., Schnetger, B., Brumsack, H.-J. (2007) In situ pore water sampling in deep intertidal flat sediments. Limnology and Oceanography: Methods 5, 136-144.

Dellwig, O., Beck, M., Lemke, A., Lunau, M., Kolditz, K., Schnetger, B., Brumsack, H.-J. (2007) Non-conservative behaviour of molybdenum in coastal waters: coupling geochemical, biological, and sedimentological processes. Geochimica et Cosmochimica Acta 71, 2745-2761.

Beck, M., Radke, M. (2006) Determination of sterols, estrogens and inorganic ions in waste water and size-segregated aerosol particles emitted from waste water treatment. Chemosphere 64, 1134-1140.