Department of Biology

Aarhus University Seal / Aarhus Universitets segl

Julia Marén Otte

Dr., Postdoc

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Julia Marén Otte


  • Department of Biology - Microbiology
Postal address:
Ny Munkegade 116
Aarhus C



30 year old Postdoctoral Researcher. PostDoc in Aquatic Biogeochemistry at Aarhus University, Denmark (since March 2021) in cooperation with Söll and Oase GmbH, Germany. PostDoc at AWI and MPI Bremen, Germany (2018-2021). Research of innovative research topics and issues such as the impacts and risks of deep sea mining with the HFG-MPG Research Department for Deep Sea Ecology and Technology at AWI & MPI. Doctorate in Geomicrobiology and Microbial Ecology with extensive expertise in Aquatic Microbial Ecology, Geomicrobiology, Biogeochemistry and Molecular biology as well as in research and education, risk assessment, expeditionary work and analytical laboratory experience. Master of Science with focus on microbiology and biochemistry. Bachelor of Science with focus on molecular biology.

Skills in planning, organization, coordination and implementation of research projects, studies and experiments. Effective project management, networking and building relationships with (inter)national and inter-disciplinary cooperation partners. Experiences in publishing of high-quality publications, writing research grant applications and peer-reviewing. Coordination of scientific events for students and international visitors. Experience in human resource management in the evaluation of applicants. Highly organized. Strong analytical and logical thinking. Trained in Science communication and scientific presentation skills. Teamwork and conflict management skills. Dynamic, motivating and committed academic teacher, supervisor and mentor for university students. Passionate about teaching scientific courses with a focus on Marine Microbiology, Geochemistry and Environmental Sciences and their interdisciplinary applications. Bilingual (German and English). Great interest in Aquatic Biogeochemistry.

Curriculum Vitae



2021 - 2023

Aarhus University, Aarhus, Denmark & Water Treatment Company - Söll GmbH, Hof, Germany

3/2021, Postdoctoral Researcher in the Section for Microbiology & Center for Electromicrobiology, Department of Biology, Aarhus University

Mentor: Prof. Schramm and Prof. Nielsen

Research topic: Cable Bacteria in Surface Water Restoration (co-financed research project with Söll)


2018 - 2021

Alfred-Wegener-Institute Helmholtz-Centre for Polar & Marine Research

Max-Planck-Institute for Marine Microbiology, Bremen, Germany

9/2018- 2/2021, Postdoctoral Researcher in the HGF-MPG Group for Deep-Sea Ecology and Technology at Alfred-Wegener-Institute (Bremerhaven) and at Max-Planck-Institute for Marine Microbiology (Bremen)

Group leader: Prof. Boetius, Mentor: Prof. Wenzhöfer

Research topic: Benthic biogeochemical activities and processes in manganese nodule fields of the Eastern Pacific Ocean




2014 - 2018

Eberhard-Karls-University Tübingen, Germany                                                

7/2018, Graduation: Dr. rer. nat.

10/2014 - 7/2018, Ph.D. student in Geomicrobiology and Microbial Ecology

 Supervisor: Prof. Kappler; Co-supervisors: Jun.-Prof. Kleindienst, Dr. Schmidt; Funding: ERC MICROFOX-MICROENERGY Grant

Thesis title: “Iron-cycling microorganisms in marine and freshwater sediments and implications for greenhouse gas emission


2012 - 2014

Albert-Ludwigs-University Freiburg, Germany

9/2014, Graduation: Master of Science in Biology

10/2012 - 9/2014, Master of Science in Microbiology and Biochemistry

Supervisors: Prof. Berg, Prof. Boll

Thesis title: “Malonic semialdehyde reductase from the ammonia-oxidizing Archaeon Nitrosopumilus maritimus”

12/2012 - 9/2014, Second matriculation in B.Sc. Geo Science; no graduation


2009 - 2012

Ruprecht-Karls-University Heidelberg, Germany

7/2012,  Graduation: Bachelor of Science in Bio Science

10/2009 - 7/2012, Bachelor of Science in Animal Molecular Physiology  

Supervisor: Prof. Frings

Thesis title: “Expression of Tmem16 chloride-activated channels in the pineal gland and tongue

10/2010 - 7/2012, Second matriculation in B.Sc. Geo Science



Department of Biology - Microbiology

Aarhus University

Aarhus C, Denmark

3 Mar 2021 → present

Research outputs

The true superheroes: Microorganisms survive it all!

Otte, J. M. & Laufer, K., Aug 2021, In: Frontiers for Young Minds. 9, 567078.

Spatial distribution of metal-cycling microbial communities along geochemical gradients in sediments of polymetallic nodule fields, Eastern Pacific Ocean

Otte, J. M. & Volz, J., 2021.

Microbial communities of the deep seafloor sediment and manganese nodules from the Clarion-Clipperton Zone, Eastern Pacific Ocean

Otte, J. M., 2020.

Sharing electrons – an extraordinary friendship of “iron bacteria” and “cable bacteria” in marine sediment"

Otte, J. M., 2020, In: Frontiers for Young Minds.

N2O formation by nitrite-induced (chemo)denitrification in coastal marine sediment

Otte, J. M., Blackwell, N., Ruser, R., Kappler, A., Kleindienst, S. & Schmidt, C., Jul 2019, In: Scientific Reports. 9, 1, 12 p., 10691.

Sterilization impacts on marine sediment-Are we able to inactivate microorganisms in environmental samples?

Otte, J. M., Blackwell, N., Soos, V., Rughöft, S., Maisch, M., Kappler, A., Kleindienst, S. & Schmidt, C., 1 Dec 2018, In: FEMS Microbiology Ecology. 94, 12, 14 p., fiy189.

Microbial anaerobic Fe(II) oxidation - Ecology, mechanisms and environmental implications

Bryce, C., Blackwell, N., Schmidt, C., Otte, J., Huang, Y-M., Kleindienst, S., Tomaszewski, E., Schad, M., Warter, V., Peng, C., Byrne, J. M. & Kappler, A., Oct 2018, In: Environmental Microbiology. 20, 10, p. 3462-3483 22 p.

The distribution of active iron-cycling bacteria in marine and freshwater sediments is decoupled from geochemical gradients

Otte, J. M., Harter, J., Laufer, K., Blackwell, N., Straub, D., Kappler, A. & Kleindienst, S., Jul 2018, In: Environmental Microbiology. 20, 7, p. 2483-2499 17 p.

The distribution of active iron-cycling microorganisms in marine and freshwater sediments and their implications for greenhouse gas emission

Otte, J. M., 2018

Malonic semialdehyde reductase from the archaeon Nitrosopumilus maritimus is involved in the autotrophic 3-hydroxypropionate/4- hydroxybutyrate cycle

Otte, J., Mall, A., Schubert, D. M., Könneke, M. & Berg, I. A., 2015, In: Applied and Environmental Microbiology. 81, 5, p. 1700-1707 8 p.


Cable Bacteria in Surface Water Restoration

Otte, J. M.


Environmental impacts and risks of deep-sea mining

Otte, J. M.


Microbial formation of minerals by communities of Fe(II)-oxidizing bacteria in modern and ancient environments

Otte, J. M.



Being at home all over the world - Microbiologist Julia Otte explores the deep sea - Constant job changes and work-related cruises, Interview in cooperation with Auswandererhaus Bremerhaven, Nordsee-Zeitung, 28th Januar

Julia Marén Otte


1 Media contribution

Das dunkle Paradies// The dark paradise; Weinheimer Nachrichten and Odenwälder Zeitung (local newspapers)

Julia Marén Otte


1 Media contribution

I’m a Geomicrobiologist working on the risks of deep-sea mining for “I’m a Scientist” Mini-Series for 4 Venir, Inc. a non-profit organization in Merced (University of California, US), YouTube

Julia Marén Otte


1 Media contribution

Job profile Marine Microbiologist;

Julia Marén Otte


1 Media contribution

What is a marine biologist's salary?;@Jetzt, Süddeutsche Zeitung

Julia Marén Otte


1 Media contribution


Invited talk about Metal-cycling microorganisms in coastal marine & deep-sea sediments

Julia Marén Otte (Lecturer)


Shared housing on the deep seafloor - Which microbial communities are found in manganese nodules?

Julia Marén Otte (Lecturer)

2021 → …