Lennart M. van Maldegem

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Published Manuscripts

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• Substantial maturity influence on carbon and hydrogen isotopic composition of n-alkanes in sedimentary rocks (2021) Organic Geochemistry
     Vinnichenko, G., Jarrett, A. M.,  Van Maldegem, L. M., and Brocks, J. J.,

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• Geological alteration of Precambrian steroids mimics early animal signatures (2020) Nature Ecology and Evolution   
  ​​​​​   Van Maldegem, L. M., Nettersheim, B.J., Leider, A., Brocks, J. J., Adam, P., Schaeffer, P., and Hallmann, C.

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• Bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after Snowball Earth (2019) Nature Communications, 10-1
     Van Maldegem, L. M., Sansjofre, P., Weijers, J. W. H., Wolkenstein K., Strother, P. K., Wormer, L., Hefter, J.,
     Nettersheim, B. J., Hoshino, Y., Schouten, S., Sinnighe Damsté, J. S., Nath, N., Griesinger, C., Kuznetsov, N.B.,
     Elie, M., Elvert, M., Tegelaar, E., Gleixner, G., and Hallmann, C.

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• Cryogenian evolution of stigmasteroid biosynthesis (2017) Science Advances 3, no. 9
     Hoshino, Y., Poshibaeva, A.,  Meredith, W., Snape, C., Versteegh G. J. M., Kuznetsov, N., Leider, A.,   
     Van Maldegem, L.M., Neumann, M., Naeher, S., Moczydłowska, M., Brocks, J.J., Jarrett, A.J.M., Tang, Q., Xiao, 
      S., McKirdy, D., Das, S. K., Alvaro, J. J., Sansjofre, P. and Hallmann, C

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Submitted Manuscripts

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• Redox and community control on Precambrian carbon isotope systematics (Submitted) ​​
     Van Maldegem, L. M., et al.

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Theses

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• Molecular and isotopic signatures of life surrounding the Neoproterozoic Snowball Earth Events
     PhD Thesis, University of Bremen ​​/ Max Planck Institute for Biogeochemistry   
      Van Maldegem, L.M.

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• Adsorption of Ni(II) to ferrihydrite and ferrihydrite-bacteria composites:Controls of nickel
  behaviour in natural environments 
     MSc Thesis, University of Leeds
     Van Maldegem, L.M.

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• Cloning and recombinant protein expression of the human Prmt5 gene
     BSc Thesis, Kyungpook National University / Avans University
     Van Maldegem, L.M.

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Conference Proceedings

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29th International Meeting In Organic Geochemistry, 2019, Gothenburg, Sweden

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• Tracing the diagenetic origin of Neoproterozoic 26-alkylsteranes
    Van Maldegem, L.M., Nettersheim, B.J., Leider, A., Brocks, J.J., Hallmann, C.

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• Lipid biomarkers reveal a bacterial dominated ecosystem after the Sturtian glaciation
    Van Maldegem, L.M., Kipp, M., Hope, J.M, Brocks, J.J.

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• A critical reassessment of redox sensitive biomarkers
     Kinsley, J., Poulton, S., Kipp, M., Van Maldegem, L.M., Brocks, J.J.

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• The occurrence of extended tricyclic terpanes in the Proterozoic and Paleozoic
     Liyanage, T.M., Van Maldegem, L.M., Boreham, C., Hope, J.M., Brocks, J.J

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• Pyrolytic formation of alkylsteranes — Assigning geological orphans to their biological parents
     Nettersheim, B.J., Van Maldegem, L.M., Leider, A., Tarozo, R. and C. Hallmann, C.

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Goldschmidt 2019, Barcelona, Spain

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• Life after the Sturtian
     Van Maldegem, L.M., Kipp, M., Krause, A., Poulton, S., Tosca, N., Clayton, K., Rooney, A.,
     Hope, J.M., Brocks, J.J.

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• The occurrence of extended tricyclic terpanes in the Proterozoic and Paleozoic
     Liyanage, T.M., Van Maldegem, L.M., Boreham, C., Hope, J.M., Brocks, J.J

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• Testing the value and limitations of redox-sensitive biomarker proxies
     Kinsley, J., Poulton, S., Kipp, M., Van Maldegem, L.M., Brocks, J.J.

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• Steranes constrain the ecological role of Ediacaran animals and protists
     Nettersheim, B.J., Brocks, J.J., Bobrovskiy, I., Van Maldegem, L.M., Hallmann, C.

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Goldschmidt 2018, Boston, USA

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• Intense heterotrophy boosted the deposition of post-Snowball Earth cap dolostone
     Van Maldegem, L. M., Sansjofre, P., Weijers, J. W. H., Wolkenstein K., Wormer, L.,
     Strother, P.K., Hallmann, C.

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28th International Meeting In Organic Geochemistry, 2017, Florence, Italy

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• Proterozoic carbon isotope systematics are influenced by redox and community composition
     Van Maldegem, L. M., Sansjofre, P., Strother, P.K., Kelly, A.E., Hallmann, C.

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• Systematic calibration of diamondoid indices as maturity indicators in Proterozoic rocks
     Leider, A., Van Maldegem, L. M., Nettersheim, B., Neumann, M., Meixnerova , J., Hoshino, Y.,
     Naeher, S., poshibaeva, A., Luo, G., and C. Hallmann, C.
   

• Structural elucidation of a novel triterpane from the Neoproterozoic era using Microcryoprobe NMR   
     Wolkenstein, K., Nath, N., Van Maldegem, L. M., Hallmann, C., Griesinger, C.

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• Phototrophy and carbon isotope systematics in the Paleoproterozoic Barney Creek Formation
     Suleimenova, A., Nettersheim, B.J., Naeher, S., Van Maldegem, L. M., Brocks, J. J.,  
    Schefuss, E., Hallmann, C.

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Goldschmidt 2017, Paris, France

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• Recent advances in the search for new hydrocarbon biomarkers
     Hallmann, C., Van Maldegem, L.M., Wolkenstein, K., Sansjofre, P., and Griesinger, C.

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American Geophysical Union Fall Meeting 2015, San Francisco, USA

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• Paleoenvironmental reconstruction of ~40ka stromatolites from the ancient Lake Lahontan,
  Nevada, USA
     Van Maldegem, L. M., Chou, L., Buongiorno, J.,  Zinke, L. A., Petryshyn, V. A., Shapiro, R. S.,
     Piazza, O., Loyd,    S. J., Tripati, A., Spear, J. R., Corsetti, F. A.

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Geological Society of America Meeting 2015, Seattle, USA

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• Coupled stratigraphy, petrography,  and Δ47 of ancient Walker Lake, Nevada reveals unique
  analog for studying Proterozoic stromatolite formation and climatic forcings
     Chou, L, Van Maldegem, L. M., Buongiorno, J., Zinke, L. A., Petryshyn, V. A., Shapiro, R. S.,
     Loyd, S., Piazza, O., Spear, J. R., Corsetti, F. A.

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• Coupled geochemical and microbiological characterization of non-carbonate firmgrounds
  from a modern soda lake, Walker Lake Nevada
     Zinke, L. A., Buongiorno, J., Chou, L., Van Maldegem, L. M., Petryshyn, V. A., Shapiro, R. S.,
     Stamps, B. W., Stevenson B. S., Spear, J. R., Corsetti, F. A.

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27th International Meeting In Organic Geochemistry, 2015, Prague, Czech Republic

 

• Role of microbial mats in the pre-Sturtian carbon cycle
     Van Maldegem, L. M., Sansjofre, P., Strother, P., Hallmann, C.

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Astrobiology Science Conference 2015, Chicago, USA

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• Controls on the Pre-Sturtian Carbon Cycle
     Van Maldegem, L. M., Sansjofre, P., Strother, P., Hallmann, C.

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Goldschmidt 2014, Sacremento, USA 

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• Coupled Cycling of Iron and Bioessential Trace-Metals
     Peacock C.L., Moon, E.M., Van Maldegem L.M.

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