Marjan Ghotbi



Research Division 3: Marine Ecology 
Ocean EcoSystems Biology Group
Helmholtz Young Investigator Group


DW_ 221/222
Phone: 4412
Email:  mghotbi(at)

Postal address:
Düsternbrooker Weg 20, D-24105 Kiel

Research Interest:


Currently, I am trying to develop a high-throughput microvolume DNA extraction for studying microbe to microbe interactions at community-level to shed light on cross kingdom microbial interactions in the ocean.

In general, I am interested in deciphering interactions between host and microbiome and within microbiome. Understanding how host attracts and retains its microbiome, and how microbe-microbe interactions further shape associated microbial communities can contribute to our understanding of holobiont’s performance/resistance/defense, which can have implications for environment and human health.

Education and academic background:


Graduate Research Assistant in Helmholtz Young Investigator Group of GEOMAR (Current)

Graduate Research Assistant in Marine Experimental Ecology Research Unit of GEOMAR

M.Sc Biological Oceanography, CAU, Kiel, Germany.

Researcher at Shahed University Agricultural Research Unit, Tehran , Iran.

Researcher at Environmental Science Research Institute of Shahid Beheshti University, SBU, Tehran, Iran.  

M.Sc Fisheries Sciences (Natural Recourses Engineering), IAU, Tehran, Iran.     

B.Sc in Fisheries Sciences (Natural Recourses Engineering), IAU, Tehran, Iran.

Selected publications:

Ghotbi, M., Taghizadeh-Mehrjardi, R., Knief, C., Ghotbi, M., Kent, A. D., & Horwath, W. R. (2023). The patchiness of soil 13C versus the uniformity of 15N distribution with geomorphic position provides evidence of erosion and accelerated organic matter turnover. Agriculture, Ecosystems & Environment356, 108616.

Ghotbi, M., Kelting, O., Blümel, M., & Tasdemir, D. (2022). Gut and Gill-Associated Microbiota of the Flatfish European Plaice (Pleuronectes platessa): Diversity, Metabolome and Bioactivity against Human and Aquaculture Pathogens. Marine Drugs, 20(9), 573.

M.Ghotbi, M. Ghotbi, & Gh. Azari Takami., 2011. Special issue, Contribution Of Vitaton (β-Carotene) To The Rearing Factors, Survival Rate And Visual Flesh Color Of Rainbow Trout Fish In Comparison With Astaxanthin 2011, Special issue of International Journal of Biological and Life Sciences, 59 .P. 1649-1654.

M Ghotbi, M Amini Dehghan, M Ghotbi. (2011). Effect of nutritional regime on expression of pathogenicity of Fusarium oxysporum against Orobanche aegyptiaca Pers. International Journal of AgriScience. 1(4), 012-031. [PDF] from

M. Wahsha, Anas. M.Al-omari, K. Mostafavi, B. Raafat, M. Ghotbi, M.Ghotbi, H.R. Rouhi, M. Esmaeili Azad, M. Ramezani, M. Amini Dehaghi, A. Moghaddam Khamse. Modellistic Approach for Land Suitability An Application to Maize .J .Am Sci, 2012; 8(5):139-149.(ISSN: 1545-1003).

Conference Presentations:

Marjan Ghotbi , Yu Wang, and David Needham. High-throughput microcosm approach reveals bacterioplankton dose-, species-, and form dependence to phytoplankton organic matter. ASLO Aquatic Sciences Meeting 2023, Palma de Mallorca, Spain, June, 2023. [Oral presentation]. 

Ghotbi, M., Wahl, M., Needham, D., Bonthond, G., Stärck, N., Buchholz,B., Künzel,S., & Weinberger, F. Greater influence of host on recruitment and/or dismissal of the environmental microbes align with the  success in seaweed holobionts. 2nd International Ocean Health Symposium. Kiel, Germany, August, 2022.

Marjan Ghotbi, Martin Wahl, David Needham, Mitra Ghotbi, Sven Künzel, and Florian Weinberger. Invasive seaweed shapes its microbiome, GEOMAR Science Day, Kiel, Germany, 2022, September.

Seaweeds microbiome and their contribution to seaweeds health, GEOMAR Science Day, Kiel, Germany, 2022, September. [presentation].


For complete publication list and more informaton please  also see:


Google Scholar Citations: