Dr. Jahangir Vajedsamiei | RD 3 Marine Ecology | RU Experimental Ecology

Post-Doc | Ecophysiology | Topic 6

Office
ENB Building 5
Room 1.314
Tel.: +49 431 600 xxx
e-mail: jvajedsamiei(at)geomar.de

Address
GEOMAR
Helmholtz-Zentrum für Ozeanforschung
Wischhofstraße 1-3
24148 Kiel
Germany

Research Group "Ecophysiology"

Research Focus

  • investigating the carbon capture and release potentials of coastal ecosystems
  • developing predictive models to inform climate change mitigation strategies
  • ecological study design, Bayesian data analytics, predictive modeling, and method development
  • high-dimensional data analysis using high-throughput methods

Projects

FUBLUC - Blasentang (Fucus) als Blue Carbon-Kohlenstoffspeicher in der Ostsee (Projektleitung Prof. Dr. Frank Melzner)

Gefördert durch die Bundesrepublik Deutschland, Zuwendungsgeber: Bundesministerium für Umwelt, Klimaschutz, Naturschutz und nukleare Sicherheit (BMUKN) aufgrund eines Beschlusses des Deutschen Bundestages
Kofinanziert durch das Land Schleswig-Holstein, Zuwendungsgeber: Ministerium für Energiewende, Landwirtschaft, Umwelt, Natur und Digitalisierung (MEKUN)

Professional Experience

since 2025

 

Postdoc
Blasentang (Fucus) als Blue Carbon-Kohlenstoffspeicher in der Ostsee
PI: Prof. Dr. Frank Melzner

GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany
RU Marine Ecology, RE Experimental Ecology - Benthic Ecology

2024 - 2025

Postdoc
Biogeochemistry: Carbon dioxide dynamics in Baltic mussel beds

Leibniz-Institut für Ostseeforschung Warnemünde (IOW), Germany

2021 - 2024

Postdoc
Ecology and evolutionary biology: Baltic benthic systems under extreme events

GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany
RU Marine Ecology, RE Experimental Ecology - Benthic Ecology

2017 - 2021

Doctor of Natural Sciences (Dr. rer. nat.)
Thesis 'The neglected role of environmental fluctuations as modulator of stress'
Supervisors: Prof. Dr. Martin Wahl, Dr. Christian Pansch, Prof. Dr. Frank Melzner

GEOMAR Helmholtz Centre for Ocean Research Kiel & University of Kiel, Germany

2011 - 2016

Research Staff 
Coastal Reef Ecology and Monitoring
National Institute for Oceanography, Tehran, Iran

2008 - 2010

Master of Science 
Marine Biology - Marine Animals
Faculty of Science, Shahid Beheshti University, Tehran, Iran
Supervisor: Dr. Behrouz Abtahi

Conferences

Vajedsamiei J., Apitz A., Zettler M. (2025) STATUS of functions of biogenic reefs in Baltic Sea with a focus on Carbon fixation. BfN-Kolloquium Meeresnaturschutz, Vilm Island, Germany. Oral presentation.

Vajedsamiei J., Niklas Warlo, Melzner F (2023) Prediction of heatwave selection pressure on ectotherm populations. ASLO 2023, Palma Mallorca, Spain. Oral presentation.

Vajedsamiei J., Melzner F, Wahl M, Raatz M, Pansch C (2021) Ectotherm performance under fluctuating thermal stress regimes: the role of metabolic suppression and baseline demand. SEB annual conference. Oral presentation.

Vajedsamiei J., Melzner F, Wahl W, Pansch C (2019) Diurnal temperature cycles in a warming ocean reveal surprising insights on mussel physiology. SEB annual conference, Seville. Poster presentation.

Publications

Nascimento-Schulze, J. C., Vajedsamiei, J., Bean, T. P., Frankholz, L., Brennan, R. S., Melzner, F., & Ellis, R. P. (2024). Thermal selection shifts genetic diversity and performance in blue mussel juveniles. bioRxiv, 2024-12.

Vajedsamiei, J., Warlo, N., Meier, H. E. M., & Melzner, F. (2024). Predicting key ectotherm population mortality in response to dynamic marine heatwaves: A Bayesian-enhanced thermal tolerance landscape approach. Functional Ecology, 00, 1–13. doi.org/10.1111/1365-2435.14620

Khosravi M, Thieltges DW, Díaz-Morales DM, Bommarito C & Vajedsamiei J (2023) Filtration and respiration responses of mussels (Mytilus edulis) to trematode parasite infections (Renicola roscovita) and transient heat exposure. Int. J. Parasitol. Parasites Wildl., 21, 296–304. doi.org/10.1016/j.ijppaw.2023.07.007

Khosravi M, Díaz-Morales DM, Thieltges DW, Wahl M & Vajedsamiei J (2023) Thermal optima of cercarial emergence in trematodes from a marine high-temperature ecosystem, the Persian Gulf. Sci Rep 13, 4923 (2023). doi.org/10.1038/s41598-023-31670-0

Rühmkorff S, Wolf F, Vajedsamiei J, Barboza FR, Hiebenthal C & Pansch C (2023). Marine heatwaves and upwelling shape stress responses in a keystone predator. Proc. R. Soc. B Biol. Sci. 290, 20222262.

Gerhard M, Koussoroplis, AM, Raatz M, Pansch C, Fey SB, Vajedsamiei J, et al. (2022) Environmental variability in aquatic ecosystems: Avenues for future multifactorial experiments. Limnol. Oceanogr. Lett., n/a. doi.org/10.1002/lol2.10286

Díaz‑Morales DM, Bommarito C, Vajedsamiei J, Grabner DS, Rilov G, Wahl M, & Bernd Sures B (2022) Heat sensitivity of first host and cercariae may restrict parasite transmission in a warming sea. Scientific reports. 12, 1174. doi.org/10.1038/s41598-022-05139-5

Bommarito C, Khosravi M, Thieltges DW, Pansch C, Hamm T, Pranovi F, Vajedsamiei J (2022) Combined effects of salinity and trematode infections on the filtration capacity, growth and condition of mussels. Marine Ecology Progress Series. 699, 33–44.

Pansch C, Raatz M, Comeau S, Hui TTY, Havenhand JN, Vajedsamiei J, Cornwall CE (2022) Editorial: Influence of environmental variability on climate change impacts in marine ecosystems. Frontiers in Marine Science. 9:994756. doi.org/10.3389/fmars.2022.994756

Vajedsamiei J, Melzner F, Raatz M, Kiko R, Khosravi M, Pansch C (2021) Simultaneous recording of filtration and respiration in marine organisms in response to short-term environmental variability. Limnology & Oceanography: Methods. 19: 196–209. doi.org/10.1002/lom3.10414

Vajedsamiei J, Melzner F, Raatz M, Moron S, Pansch C (2021) Cyclic thermal fluctuations can be burden or relief for an ectotherm depending on fluctuations’ average and amplitude. Functional Ecology. 35, 2483–2496. doi.org/10.1111/1365-2435.13889

Vajedsamiei J, Wahl M, Schmidt A, Yazdanpanahan M, Pansch C (2021) The higher the needs, the lower the tolerance: Extreme events may select ectotherm recruits with lower metabolic demand and heat sensitivity. Frontiers in Marine Science. 8, 264. doi.org/10.3389/fmars.2021.660427

Wahl M, Barboza FR, Buchholz B, Dobretsov S, Guy-Haim T, Rilov G, Schuett R, Wolf F, Vajedsamiei J, Yazdanpanah M. and Pansch C (2021) Pulsed pressure: fluctuating impacts of multifactorial environmental change on a temperate macroalgal community. Limnology and Oceanography. 66: 4210-4226. doi.org/10.1002/lno.11954

Saleh A, Vajedsamiei J, Amini-Yekta F, Seyed Hashtroudi M, Chen CTA, Sheijooni Fumani N (2020) The carbonate system on the coral patches and rocky intertidal habitats of the northern Persian Gulf: Implications for ocean acidification studies. Marine Pollution Bulletine. 151, 110834. doi.org/10.1016/j.marpolbul.2019.110834

Vajedsamiei J, Saleh A, Shirvani A, Sheijooni N, Hashtroudi M, Pratchett M (2016) Variation in calcification rate of Acropora downingi relative to seasonal changes in environmental conditions in the northeastern Persian Gulf. Coral Reefs. 35, 137–1382. doi.org/10.1007/s00338-016-1464-6

Vajedsamiei J, Saleh A, Mehdinia A, Shirvani A, Kayal M (2015) Photosynthetic response of Persian Gulf Acroporid corals to summer versus winter temperature deviations. PeerJ. 3:e1062. doi.org/10.7717/peerj.1062

Vajedsamiei J, Saleh A, Mehdinia A, Shirvani A, Sharifi H (2014) Specific thermal regime and coral bleaching pattern in Hengam Island, eastern Persian Gulf. Journal of the Persian Gulf (Marine Science). 5, 15–25.

Feary DA, Burt JA, Bauman AG, Al Hazeem S, Abdel-Moati MA, Al-Khalifa KA, et al. (2013) Critical research needs for identifying future changes in Gulf coral reef ecosystems. Marine Pollution Bulletin. 72, 406–416.

Vajedsamiei J, Dab K, Ghezellou P, ShirvaniA (2013) Some scleractinian corals (Scleractinia: Anthozoa) of the Larak Island, Persian Gulf. Zootaxa. 3636, 101–143.