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Recently defended

Almud Lonsing

Defense Almud Lonsing
Congratulations: Almud got her hat! (from left to right: Prof. Dr. Rudolf Amann, Dr. Katrin Knittel, Leonard Kloska, Almud Lonsing, Prof. Dr. Jens Harder, Prof. Dr. Michael W. Friedrich) © Max-Planck-Institut für Marine Mikrobiologie/S. Kalenborn

Almud Lonsing

Department: Molecular Ecology

Exam Date: Friday, December 6, 2024

Topic of the dissertation:

"Characterization of a limonene-degrading methanogenic enrichment culture"

Joris Krull

Defense Joris krull
Congratulations: Joris got his hat! (From left to right: Dr. Dr. Chandni Sidhu, Leonard Rößler, Dr. Greta Reintjes, Prof. Dr. Tilmann Harder, Joris Krull, Prof. Dr. Jan-Hendrik Hehemann, Sophie Kothe) © MPIMM

Joris Krull

Department: MARUM MPG Bridge Group Mar­ine Gly­cobi­o­logy

Exam Date: Thursday, November 28, 2024

Topic of the dissertation:

"Diatom mannan - a sulfated glycan shapes surface ocean microbiomes"

Abiel Kidane

Defense Abiel Kidane
Congratulations: Abiel got his hat! (from left to right: Katie Moore, Prof. Dr. Wolfgang Bach, Elif Gülcü, Abiel Kidane, Dr. Wiebke Mohr, Prof. Dr. Marcel Kuypers, Dr. Morten Iversen) © MPIMM

Abiel Kidane

Department: Biogeochemistry

Exam Date: Thurday, November 7, 2024

Topic of the dissertation:

"Iron leads to divergent responses in N2-fixing microorganisms in the oligotrophic ocean"

Saskia Kalenborn

Defense Saskia Kalenborn
Congratulations: Saskia got her hat! (from left to right: Dr. Bernhard Fuchs, Dr. Greta Reintjes, Prof. Dr. jens Harder, Saskia Kalenborn, Ana Gusmao, Prof. Dr. Michael W. Friedrich) © Max Planck Institute for Marine Microbiology

Saskia Kalenborn

Department: Molecular Ecology

Exam Date: Monday, October 7, 2024

Topic of the dissertation:

"Complex algal polysaccharides as substrates for Maribacter strains"

Daniel Doherty Weason

Defense Daniel Doherty
Congratulations: Daniel got his hat! (from left to right: Prof. Dr. Claudio Richter, Prof. Dr. Tilmann Harder, Dr. Florence Schubotz, Daniel Doherty, Dr. Judith Klatt, Dr. Dirk de Beer, Brandon Marcus Hutt, Nahja Busse) © Max Planck Institute for Marine Microbiology

Daniel Doherty Weason

Department: (former) Microsensor Group

Exam Date: Wednesday, October 2, 2024

Topic of the dissertation:

"The far-reaching effect of the production, degradation, and trophic transfer of organic arsenic species in the cycle of arsenic"

Olivia Bourceau

Defense Jan Brüwer
Congratulations: Olivia got her hat! (from left to right: Dr. Tim Ferdelman, Dr. Judith Klatt, Dr. Dirk de Beer, Olivia Bourceau, Prof. Dr. Michael W. Friedrich, Chyrene Moncada, Rieke Koopmann) © Max Planck Institute for Marine Microbiology/J. Harder

Olivia Bourceau

Department: Molecular Ecology

Exam Date: Tuesday, July 16, 2024

Topic of the dissertation:

"The impact of electron acceptor variation and reactive oxygen species on microbial respiration rates"

Ashley Isaac

Defense Jan Brüwer
Congratulations Ashley! (from left to right: Prof. Dr. Michael W. Friedrich, Prof. Dr. Thorsten Brinkhoff, Prof. Dr. Shady Amin, Ashley Isaac, Prof. Dr. Rudolf Amann, Grace Ho, Nahja Busse) © Max Planck Institute for Marine Microbiology/J. Harder

Ashley Isaac

Department: Molecular Ecology

Exam Date: Friday, July 12, 2024

Topic of the dissertation:

"The mechanism of bacterial colonization of phytoplankton phycospheres"

Jan Brüwer

Defense Jan Brüwer
Congratulations: Jan got his hat! (from left to right: Prof. Dr. Michael W. Friedrich, Jan Brüwer, PD Dr. Bernhard Fuchs, Prof. Dr. Stephen J. Giovannoni, Isabella M. Wilkie, Julia Pamphile Dos Santos) © Max Planck Institute for Marine Microbiology/J. Harder

Jan Brüwer

Department: Molecular Ecology

Exam Date: Friday, May 3, 2024

Topic of the dissertation:

"Using fluorescence in situ hybridization to study intracellular properties"

Fengqing Wang

Defense Fengqing Wang
Congratulations Fengqing! (from left to right: Prof. Dr. Thorsten Brinkhoff, Prof. Dr. Michael W. Friedrich, Fengqing Wang, Prof. Dr. Rudolf Amann, Dr. Greta Reintjes, Mahum Farhan, Gaétane Sallard) © Max Planck Institute for Marine Microbiology/J. Harder

Fengqing Wang

Department: Molecular Ecology

Exam Date: Thursday, May 2, 2024

Topic of the dissertation:

"Polysaccharide utilization by bacteria associated with micro- and macroalgae"

Joshua Mills

Defense Joshua Mills
Congratulations Jay! (from left to right: Mustafa Törer, Prof. Dr. Andreas Dotzauer, Prof. Dr. Michael W. Friedrich, Joshua Mills, Dr. Susanne Erdmann, Marie-Caroline Müller) © MPIMM

Joshua Mills

Department: Max Planck Research Group Archaeal Virology

Exam Date: Friday, January 26, 2024

Topic of the dissertation:

"The Ecology and Evolution of the Extracellular Vesicles of Halophilic Archaea"

Caroline Zeidler

Defense Caroline Zeidler
Congratulations: Caro got her hat! (from left to right: Prof. Dr. Nicole Dubilier, Prof. Dr. Tilmann Harder, Caroline Zeidler, Prof. Dr. Jillian Petersen, Prof. Dr. Michael W. Friedrich, Guillermo Cera Ramirez, Andrea Nebel) © MPIMM

Caroline Zeidler

Department: Symbiosis

Exam Date: Monday, December 11, 2023

Topic of the dissertation:

"Bioplastic-eating animals: Polyhydroxyalkanoate degrading enzymes in a chemosymbiotic worm"

Patric Bourceau

Defense Patric Bourceau
Congratulations: Patric got his hat! (from left to right: Dr. Manuel Liebeke, Patric Bourceau, Prof. Dr. Tilmann Harder, Prof. Dr. Nicole Dubilier, Dr. Boran Kartal, Aurelia Böttgenbach, Andrea Nebel) © MPIMM

Patric Bourceau

Department: Symbiosis

Exam Date: Wednesday, December 6, 2023

Topic of the dissertation:

"Establishing a model system to unravel metabolic interactions in the Bathymodiolin symbiosis"

Paloma Garrido Amador

Defense Paloma Garrido Amador
Congratulations: Paloma got her hat! (from left to right: Dr. Boran Kartal, Dr. Katharina Kitzinger, Paloma Garrido Amador, Prof. Dr. David Richardson, Prof. Dr. Michael W. Friedrich) © MPIMM

Paloma Garrido Amador

Department: Research Group Microbial Physiology

Exam Date: Thursday, November 30, 2023

Topic of the dissertation:

"Microbial physiology of nitric-oxide transforming microorganisms"

Farooq Moin Jalaluddin

Defense Farooq Moin Jalaluddin
Congratulations: Farooq got his hat! (from left to right: Prof. Dr. Elda Mira­montes Gar­cía, Prof. Dr. Marcel Kuypers, Farooq Moin Jalaluddin, Andrea Nebel, Dr. Soeren Ahmerkamp, Dr. Gerhard Bartzke) © MPIMM

Farooq Moin Jalaluddin

Department: Biogeochemistry

Exam Date: Monday, November 20, 2023

Topic of the dissertation:

"Microscale insights into marine biogeochemical cycling: Linking microbial activity and mass transfer"

Hanna Zehnle

Defense Hanna Zehnle
Congratulations: Hanna got her hat! (from left to right: Dr. Julius Lipp, Prof. Dr. Silvan Scheller, Dr. Gunter Wegener, Hanna Zehnle, Prof. Dr. Antje Boetius, Prof. Dr. Wolfgang Bach, Giulia Andrea Rüegg) © MPIMM

Hanna Zehnle

Department: HGF MPG Joint Re­search Group for Deep-Sea Eco­logy and Tech­no­logy

Exam Date: Friday, October 20, 2023

Topic of the dissertation:

"Characterization of microorganisms mediating anaerobic hydrocarbon degradation in marine sediments"

Laura Johanna Gebhard

Defense Laura Johanna Gebhard
Congratulations: Johanna got her hat! (from left to right: Guillermo Cera Ramirez, Dominik Lücking, Prof. Dr. Michael Friedrich, Dr. Elina Roine, Laura Johanna Gebhard, Prof. Dr. Andreas Dotzauer, Dr. Susanne Erdmann) © MPIMM

Laura Johanna Gebhard

Department: Max Planck Research Group Archaeal Virology

Exam Date: Wednesday, October 18, 2023

Topic of the dissertation:

"Genetic and Biochemical Characterisation of Plasmid Vesicles & Other Virus-Like  Elements in Archaea"

Jan von Arx

Defense Jan von Arx
Congratulations! Jan got his hat!

Jan von Arx

Department: Biogeochemistry

Exam Date: Thursday, September 21, 2023

Topic of the dissertation:

"Nitrous oxide formation and consumption in contrasting oxygen-depleted environments"

Tomas Alarcon Schumacher

Defense Tomas Alarcon
Congratulations: Tomas got his hat! (from left to right: Kathryn Lambert-Slosarska, Laura Johanna Gebhard, Prof. Dr. Nicole Dubilier, Dr. Susanne Erdmann, Tomas Alarcon Schumacher, Dr. Hanna Oksanen and Prof. Dr. Andreas Dotzauer) © MPIMM/Grace D'Angelo

Tomas Alarcon Schumacher

Department: Max Planck Research Group Archaeal Virology

Exam Date: Monday, September 18, 2023

Topic of the dissertation:

"Virus-host interactions during chronic infections and the diversity and evolution of Pleolipoviruses"

Marion Jespersen

Defense Marion Jespersen
Congratulations: Marion got her hat! (v.l.n.r.: Olivier Lemaire, Mustafa Rasim Törer, Prof. Dr. Christiane Dahl, Prof. Dr. Inês Cardoso Pereira, Marion Jespersen, Dr. Tristan Wagner and Prof. Dr. Rudolf Amann) © MPIMM

Marion Jespersen

Department: Max Planck Research Group Microbial Metabolism

Exam Date: Thursday, August 24, 2023

Topic of the dissertation:

"Structural and biochemical characterization of enzymes used by anaerobic energy extremophiles for sulfur and carbon transformation"

Nevena Maslac

Defense Nevena Maslac
Congratulations: Nevena got her hat! (from left to right: Prof. Dr. Ross D. Milton, Dr. Marco Bellinzoni, Nevena Maslać, Dr. Tristan Wagner, Prof. Dr. Rudolf Amann and Prof. Dr. Jan-Hendrik Hehemann; in front: Amelie Heidenreich, Marie-Car­oline Müller.) © MPIMM/Marija Maslać

Nevena Maslac

Department: Max Planck Research Group Microbial Metabolism

Exam Date: Thursday, August 10, 2023

Topic of the dissertation:

"Structural and biochemical characterisation of N2-assimilation system and its regulation in thermophilic methanogenic archaea"

Hagen Buck-Wiese

Defense David Benito Merino
Congratulations: Hagen got his hat! (From left to right: Dr. Manuel Liebeke, Prof. Dr. Kai-Uwe Hinrichs, Prof. Dr. Jan-Hendrik Hehemann, Aurelia Böttgenbach, Hagen Buck-Wiese, Dr. Marlis Reich and Prof. Dr. Rudolf Amann) © MPIMM

Hagen Buck-Wiese

Department: MARUM MPG Bridge Group Mar­ine Gly­cobi­o­logy

Exam Date: Friday, June 16, 2023

Topic of the dissertation:

"Enzymatic diversification and brown algae as sources of complex glycans in the marine dissolved organic carbon reservoir"

David Benito Merino

Defense David Benito Merino
Congratulations: David Benito Merino got his hat! (From left to right: Dr. Cornelia Welte, Prof. Dr. Antje Boetius, David Benito Merino, Dr. Gunter Wegener, Prof. Dr. Kai-Uwe Hinrichs and Dr. Florence Schubotz.) © MPIMM

David Benito Merino

Department: HGF MPG Joint Re­search Group for Deep-Sea Eco­logy and Tech­no­logy

Exam Date: Friday, January 17, 2023

Topic of the dissertation:

"Exploring the upper temperature limit of microbial alkane degradation"

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