Forschungsgruppe Biogeochemie

Dr. Wiebke Mohr

MPI für Marine Mikrobiologie
Celsiusstr. 1
D-28359 Bremen




+49 421 2028-6300

Dr. Wiebke Mohr


Tschitschko B, Esti M, Philippi M, Kidane AT, Littmann S, Kitzinger K, Speth DR, Li S, Kraberg A, Tienken D, Marchant HK, Kartal B, Milucka J, Mohr W, Kuypers MMM (2024) Rhizobia–diatom symbiosis fixes missing nitrogen in the ocean. Nature,


von Arx JN, Kidane AT, Philippi M,Mohr W, Lavik G, Schorn S, Kuypers MMM, Milucka J (2023) Methylphosphonate-driven methane formation and its link to primary production in the oligotrophic North Atlantic.Nature Communications14, no. 1: 6529.

Shao, Zhibo, et al. (>75 co-authors) (2023) Global oceanic diazotroph database version 2 and elevated estimate of global N2fixation.Earth System Science Data15.8.


Gonzalez-Nayeck AC,Mohr W, Tang T, Sattin S, Parenteau MN, Jahnke LL, Pearson A (2022) Absence of canonical trophic levels in a microbial mat.Geobiology20: 726-740.


Duerschlag J,Mohr W, Ferdelman TG, LaRoche J, Desai D, Croot PL, Voß D, Zielinski O, Lavik G, Littmann S, Martínez-Pérez C, Tschitschko B, Bartlau N, Osterholz H, Dittmar T, Kuypers MMM (2022) Niche partitioning by photosynthetic plankton as a driver of CO2fixation across the oligotrophic South Pacific Subtropical Ocean.The ISME Journal16, 465-476.


Mohr, W., Lehnen, N., Ahmerkamp, S., Marchant, H.K., Graf, J.S., Tschitschko, B., Yilmaz, P., Littmann, S., Gruber-Vodicka, H., Leisch, N., Schubert,C., Milucka, J., Kuypers, M., (2021). Terrestrial-type nitrogen-fixing symbiosis between seagrass and a marine bacterium. Nature, 600 (7887), 105-109

Phil­ippi, M., Kitzinger, K., Berg, JS,Tschitschko, B., Kid­ane, AT, Littmann, S. Marchant, HK, Storelli, N., Winkel, LH, Schubert, CJ and Mohr, W., Kuypers MMM (2021).Purple sul­fur bac­teria fix N2 via mo­lyb­denum ni­tro­genase in a low mo­lyb­denum Protero­zoic ocean ana­logue. Nature Com­mu­nic­a­tions, 12 (1), pp.1-12.

Ste­vens, B., et al., (2021). EU­RE­C4A. Earth System Science Data,13(8), pp.4067-4119.


Kharbush, J., Close, H., van Mooy, B., Arnosti, C., Smittenberg, R., Le Moigne, F., Mollenhauer, G., Scholz-Böttcher, B., Obreht, I., Koch, B., Becker, K., Iversen, M.,Mohr, W. 2020. Particulate organic carbon deconstructed: Molecular and chemical composition of particulate organic carbon in the ocean. Frontiers in Marine Science,7.

White, A.E., Granger, J., Selden, C., Gradoville, M.R., Potts, L., Bourbonnais, A., Fulweiler, R.W., Knapp, A.N.,Mohr, W.,Moisander, P.H. and Tobias, C.R., A critical review of the15N2tracer method to measure diazotrophic production in pelagic ecosystems.Limnology and Oceanography: Methods.

Löscher, C.,Mohr, W.,Bange, H. and Canfield, D.E., 2020. No N2fixation in the Bay of Bengal?. Biogeosciences 17, pp.851-864.


Schoffelen NJ, Mohr W, Ferdelman TG, Duerschlag J, Littmann S, Ploug H, Kuypers MMM (2019) Phosphate availability affects fixed nitrogen transfer from diazotrophs to their epibionts. The ISME Journal


Eichner M, Thoms S, Rost B, Mohr W, Ahmerkamp S, Ploug H, Kuypers MMM, de Beer D (2018) N2 fixation in free-floating filaments of Trichodesmium is higher than in transiently suboxic colony microenvironments. New Phytologist,  DOI:10.1111/nph.15621.

Schoffelen NJ, Mohr W, Ferdelman TG, Littmann S, Duerschlag J, Zubkov MV, Ploug H, Kuypers MMM (2018) Single-cell imaging of phosphorus uptake shows that key harmful algae rely on different phosphorus sources for growth. Scientific  Reports:  DOI:10.1038/s41598-018-35310-w. 

Martínez‐Pérez C., Mohr W., Schwedt A., Dürschlag J., Callbeck C. M., Schunck H., Dekaezemacker J., Buckner C.R.T, Lavik G., Fuchs B.M., Kuypers M. M. (2018). Metabolic versatility of a novel N2‐fixing Alphaproteobacterium isolated from a marine oxygen minimum zone. Environmental Microbiology. DOI: 10.1111/1462-2920.14008.


Tang T, Mohr W, Sattin SR, Rogers DR, Girguis PR, Pearson A (2016) Geochemically distinct carbon isotope distributions in Allochromatium vinosum DSM 180T grown photoautotrophically and photoheterotrophically. Geobiology DOI:10.1111/gbi.12221.

Bristow LA, Mohr W, Ahmerkamp S, Kuypers MMM (2017) Nutrients that limit growth in the ocean. Current Biology DOI: 10.1016/j.cub.2017.03.030.


Martínez-Pérez C, Mohr W, Loescher CR, Dekaezemacker J, Littmann S, Yilmaz P, Lehnen N, Fuchs B, Lavik G, Schmizt RA, LaRoche J, Kuypers MMM (2016) The small unicellular diazotrophic symbiont, UCYN-A, is a key player in the marine nitrogen cycle. Nature Microbiology, DOI: 10.1038/NMICROBIOL.2016.163.

Lehnen N, Marchant HK, Schwedt A, Milucka J, Lott C, Weber M, Dekaezemacker J, Seah BKB, Hach PF, Mohr W, Kuypers MMM (2016) High rates of microbial dinitrogen fixation and sulfate reduction associated with the Mediterranean seagrass Posidonia oceanicaSystematic and Applied Microbiology, DOI: 10.1016/j.syapm.2016.08.004. 

Marchant HK, Mohr W, Kuypers MMM (2016) Recent advances in marine N-cycle studies using 15N labeling methods. Current Opinion in Biotechnology 41: 53-59.

Hamilton TL, Bovee RJ, Sattin SR, Mohr W, Gilhooly III WP, Lyons TW, Pearson A, Macalady JL (2016) Carbon and Sulfur Cycling below the Chemocline in a Meromictic Lake and the Identification of a Novel Taxonomic Lineage in the FCB Superphylum, Candidatus Aegiribacteria. Frontiers in Microbiology, DOI: 10.3389/fmicb.2016.00598.


Klawonn I, Lavik G, Boening P, Marchant H, Dekaezemacker J, Mohr W, Ploug H (2015) Simple approach for the preparation of 15-15N2-enriched water for nitrogen fixation assessments: Evaluation, application and recommendations. Frontiers in Microbiology 6: 769. DOI: 10.3389/fmicb.2015.00769.


Krupke A, Mohr W, LaRoche J, Fuchs BM, Amann RI, Kuypers MMM (2014). The effect of nutrients on carbon and nitrogen fixation by the UCYN-A-haptophyte symbiosis. The ISME Journal DOI:10.1038/ismej.2014.253.

Mohr W, Tang T, Sattin SR, Bovee RJ, Pearson A (2014) Protein stable isotope fingerprinting: Multidimensional protein chromatography coupled to stable isotope-ratio mass spectrometry. Analytical Chemistry 86: 8514-8520. DOI: 10.1021/ac502494b.

Hamilton TL, Bovee RJ, Thiel V, Sattin SR, Mohr W, Schaperdoth I, Vogl K, Gilhooly III WP, Lyons TW, Tomsho LP, Schuster SC, Overmann J, Bryant DA, Pearson A, Macalady JL (2014) Coupled reductive and oxidative sulfur cycling in the phototrophic plate of a meromictic lake. Geobiology 12: 451-468. DOI: 10.1111/gbi.12092.


Mohr W, Vagner T, Kuypers MMM, Ackermann M, LaRoche J (2013) Resolution of conflicting signals at the single-cell level in the regulation of cyanobacterial photosynthesis and nitrogen fixation. PLoS ONE 8(6): e66060. DOI: 10.1371/journal.pone.0066060.

Krupke A, Musat N, LaRoche J, Mohr W, Fuchs BM, Amann RI, Kuypers MMM, Foster R (2013) In situ identification and N2 and C fixation rates of uncultivated cyanobacteria populations. Systematic and Applied Microbiology 36(4): 259-271.


Großkopf T*, Mohr W* , Baustian T, Schunck H, Gill D, Kuypers MMM, Lavik G, Schmitz RA, Wallace DWR, LaRoche J (2012) Doubling of marine N2 fixation rates based on direct measurements. Nature 488: 361-364. *Equal first author contribution.


Mohr W, Großkopf T, Wallace DWR and LaRoche J (2010) Methodological underestimation of oceanic nitrogen fixation rates. PLoS One 5(9): e12583. DOI 10.1371/journal.pone.0012583.

Mohr W, Intermaggio MP and LaRoche J (2010) Diel rhythm of nitrogen and carbon metabolism in the unicellular diazotrophic cyanobacterium Crocosphaera watsonii WH8501. Environmental Microbiology 12: 412-421.


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