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M. Sc. Katja Seebass | RD 3 Marine Ecology | RU Experimental Ecology

Doctoral Researcher | Environmental Physiology | Topic 6

Research Focus

My research investigates the impact of environmental stress on the common sea star (Asterias rubens) in the Kiel Fjord. By combining field monitoring, mesocosm experiments and infection trials, I explore how prolonged heat stress affects immune function and microbiome stability, potentially increasing vulnerability to disease. Key aspects of my work include:

• Stress-Induced Immune Suppression: Examining how environmental stressors, such as temperature fluctuations weaken the immune system of A. rubens, increasing susceptibility to pathogens.
• Microbiome Dynamics and Dysbiosis: Investigating shifts in microbiome composition under stress conditions in both field and experimental settings and their role in host health and disease susceptibility.
• Physiological Responses to Environmental Change: Assessing how A. rubens responds to changing environmental conditions by analyzing physiological parameters

Projects

PhD Thesis:鈥� Warming and Extreme Events: Impacts of Climate Change and Heatwaves on the Immune Competence and Microbiome of Asterias rubens鈥�;funded by the Deutsche Bundesstiftung Umwelt (DBU), Running (Funding period 10/2023 鈥� 09/2026)

Outreach: 鈥淎mazingly Diverse 鈥� Discover the Baltic Sea from small to large鈥�, colouring book for school children ages

Vita

October 2023 - Present	PhD Student Environmental Physiology Christian-Albrechts-University Kiel & 黑料视频 Helmholtz Center for Ocean Research Kiel, Kiel, Germany Warming and Extreme Events: Effects of Heatwaves on the Immune Competence and Microbiome of A. rubens.鈥�  Supervisor Prof. Dr. Frank Melzner
October 2020 - August 2023	Master of Science Biological Oceanography Christian-Albrechts-University & 黑料视频 Helmholtz Center for Ocean Research Kiel, Kiel, Germany Thesis in the group 鈥淓nvironmental Physiology鈥� at 黑料视频 Kiel, 鈥淪ea star at the limit: short-term heat stress affects coelomocytes and cellular metabolism in the common sea star A. rubens.鈥� Supervisors: Prof. Dr. Frank Melzner, Dr. Jahangir Vajedsamiei
October 2016 -February 2020	Bachelor of Science Biological Lifesciences University of Osnabr眉ck, Germany Thesis in the group 鈥淏enthic Ecology鈥� at 黑料视频 Kiel, 鈥淭he role of recovery phases in mitigating the negative effect of marine heatwaves on the sea star A. rubens.鈥�, Supervisors: Prof. Dr. Christian Pansch, Prof. Dr. rer. nat G眉nther Purschke

Publications