Dr. Angelika Graiff

Research Interests

  • Ecological modelling (development of a benthic prognostic box model to simulate macroalgal growth)
  • Brown algae (Phaeophyceae)
  • Ecophysiology, photosynthesis, primary production and carbon budget
  • Benthic ecosystems
  • Impact of ocean acidification and warming on benthic communities
  • Benthocosms
  • Floating kelps


Graiff, A., Braun, M., Driemel, A., Ebbing, J., Grossart, H.P., Harder, T., Hoffman, J.I., Koch, B., Leese, F., Piontek, J., Scheinert, M., Quillfeldt, P., Zimmermann, J. & Karsten, U. (2023) Big Data in Polar Sciences – Current status, deficiencies and future perspectives. Polarforschung 91, 45-57; doi.org/10.5194/polf-91-45-2023

Franke, K., Matthes, L.C., Graiff, A., Karsten, U. & Bartsch, I. (2023) The challenge to estimate kelp production in a turbid marine environment. Journal of Phycology. https://doi.org/10.1111/jpy.13327

Borburema, H.D.S., Graiff, A., Karsten U. & Marinho-Soriano E. (2022) Photobiological and biochemical responses of mangrove-associated red macroalgae Bostrychia calliptera and Bostrychia montagnei to short-term salinity stress related to climate change. Hydrobiologia https://doi.org/10.1007/s10750-022-05006-4

Borburema, H.D.S., Graiff, A., Marinho-Soriano E. & Karsten U. (2022) Photosynthetic performance, growth, pigment content, and photoprotective compounds of the mangrove macroalgae Bostrychia calliptera and Bostrychia montagnei (Rhodophyta) under light stress. Frontiers in Marine Science 9:989454. doi:10.3389/fmars.2022.989454

Graiff, A. & Karsten, U. (2021) Antioxidative Properties of Baltic Sea Keystone Macroalgae (Fucus vesiculosus, Phaeophyceae) under Ocean Warming and Acidification in a Seasonally Varying Environment. Biology 10(12), 1330; https://doi.org/10.3390/biology10121330

Graiff, A., Bartsch, I., Glaser, K. & Karsten, U. (2021) Seasonal photophysiological performance of adult Western Baltic Fucus vesiculosus (Phaeophyceae) under ocean warming and acidification. Frontiers in Marine Science 8:1–17; doi:10.3389/fmars.2021.666493

Graiff, A., Karsten, U., Radtke, H., Wahl, M. & Eggert, A. (2020) Model simulation of seasonal growth of Fucus vesiculosus in its benthic community. Limnology and Oceanography Methods; DOI: 10.1002/lom3.10351

Al-Janabi, B., Wahl, M., Karsten, U., Graiff, A., Kruse, I. (2019) Sensitivities to different global change drivers may correlate positively or negatively in a foundational marine macroalga. Scientific Reports 9:article 14653; doi.org/10.1038/s41598-019-51099-8

Wahl, M., Werner, F.J., Buchholz, B., Raddatz, S., Graiff, A., Matthiessen, B., Karsten, U., Hiebenthal, C., Hamer, J., Ito, M., Gülzow, E., Rilov, G., Guy-Haim, T. (2019) Season affects strength and direction of the interactive impacts of ocean warming and biotic stress in a coastal seaweed ecosystem. Limnology and Oceanography 65:807-827; https://doi.org/10.1002/lno.11350

Prelle, L.R., Graiff, A., Gründling-Pfaff, S., Sommer, V., Kuriyama, K., Karsten, U. (2019) Photosynthesis, respiration and growth responses of Baltic Sea benthic diatoms to change in environmental conditions in proximity to a peatland (Hütelmoor). Frontiers in Microbiology 10:1-19; doi.org/10.3389/fmicb.2019.01500

Graiff, A., Ruth, W., Karsten, U. (2018) Identification and quantification of laminarins in brown algae. In: Charrier, B., Wichard, T., Reddy, C.R.K. [Eds.]: Protocols for macroalgal research ISBN-13: 978-1-4987-9642-2

Graiff, A., Dankworth, M., Wahl, M., Karsten, U., Bartsch, I. (2017) Seasonal variations of Fucus vesiculosus fertility under ocean acidification and warming in the western Baltic Sea. Botanica Marina – associated to the Special Issue of the Phycomorph project 60:239-255. DOI: 10.1515/bot-2016-0081

Graiff, A., Pantoja, J.F., Tala, F., Thiel, M. (2016) Epibiont load causes sinking of viable kelp rafts - seasonal variation in floating persistence of giant kelp Macrocystis pyrifera. Marine Biology 163:191 DOI: 10.1007/s00227-016-2962-3

Werner, F.J., Graiff, A., Matthiessen, B. (2016) Even moderate nutrient enrichment negatively adds up to global climate change effects on a habitat-forming seaweed system. Limnology and Oceanography. 61:1891–1899 DOI: 10.1594/PANGAEA.869444

Al-Janabi, B., Kruse, I., Graiff, A., Winde, V., Lenz, M., Wahl, M. (2016) Buffering and amplifying interactions among OAW (ocean acidification & warming) and nutrient enrichment on early life-stage Fucus vesiculosus L. (Phaeophyceae) and their carry over effects to hypoxia impact. PLoS ONE 11:1–18 DOI: 10.1371/journal.pone.0152948

Mensch, B., Neulinger, S.C., Graiff, A., Pansch, A., Künzel, S., Fischer, M.A., Schmitz-Streit, R.A. (2016) Restructuring of epibacterial communities on Fucus vesiculosus forma mytili in response to elevated pCO2 and increased temperature levels. Frontiers in Microbiology 7:1–15 DOI: 10.3389/fmicb.2016.00434

Al-Janabi, B., Kruse, I., Graiff, A., Karsten, U., Wahl, M. (2016) Genotypic variation influences tolerance to warming and acidification of early life-stage Fucus vesiculosus L. (Phaeophyceae) in a seasonally fluctuating environment. Marine Biology 163:1–15 DOI: 10.1371/journal.pone.0152948

Werner, F.J., Graiff, A., Matthiessen, B. (2016) Temperature effects on seaweed-sustaining top-down control vary with season. Oecologia 180:889–901 DOI: 10.1007/s00442-015-3489-x

Graiff, A., Ruth, W., Kragl, U., Karsten, U. (2016) Chemical characterization and quantification of the brown algal storage compound laminarin — A new methodological approach. Journal of Applied Phycology 28:533–543 DOI: 10.1007/s10811-015-0563-z

Graiff, A., Bartsch, I., Ruth, W., Wahl, M., Karsten, U. (2015) Season exerts differential effects of ocean acidification and warming on growth and carbon metabolism of the seaweed Fucus vesiculosus in the western Baltic Sea. Frontiers in Marine Science 2:1–18 DOI: 10.3389/fmars.2015.00112

Graiff, A., Liesner, D., Karsten, U., Bartsch, I. (2015) Temperature tolerance of western Baltic Sea Fucus vesiculosus – growth, photosynthesis and survival. Journal of Experimental Marine Biology and Ecology 471:8–16 DOI: 10.1016/j.jembe.2015.05.009

Graiff, A., Karsten, U., Meyer, S., Pfender, D., Tala, F., Thiel, M. (2013) Seasonal variation in floating persistence of detached Durvillaea antarctica (Chamisso) Hariot thalli. Botanica Marina 56:3–14 DOI: 10.1515/bot-2012-0193

Graiff, A., Grohmann, C., Linsenmair, K.E. (2010) Impact of the termite Macrotermes michaelseni on plant growth (S05.01). In: Jürgens, N., Haarmeyer, D.H., Luther-Mosebach, J., Dengler, J., Finckh, M., Schmiedel, U. [Eds.]: Biodiversity in southern Africa. Volume 1: Patterns at local scale - the BIOTA Observatories, Klaus Hess Publishers, Göttingen & Windhoek, p 220


Professional Experience      
since 2018 Scientist Coordination DFG - Priority Program 1158 - Antarctic Research  
2015-2018 Scientist „Modelling interactive stress scenarios in benthic macrophyte communities: integration and visualization of complex structural and environmental global change drivers“ (within the framework of the BIOACID III project funded by BMBF) Applied Ecology & Phycology, University of Rostock
2012-2015 Scientist “Physiological responses of macrophyte communities to interactive stress” (within the framework of the BIOACID II project funded by BMBF) Applied Ecology & Phycology, University of Rostock
2003-2010 Student Assistant diverse projects Ecophysiology & Vegetation Ecology, University of Würzburg
2015 Dissertation “Seasonal responses of a keystone macrophyte community in the western Baltic Sea to ocean warming and acidification” Applied Ecology & Phycology, University of Rostock
2012-2015 Doctoral Thesis Physiological responses of macrophyte communities to interactive stress (within the framework of the BIOACID II project funded by BMBF) Applied Ecology & Phycology, University of Rostock
2012 Master Thesis Floating persistence and physiological responses of the bull kelp Durvillaea antarctica at the sea surface under natural conditions Applied Ecology & Phycology, University of Rostock
2010-2012 Studies Master of Science in Marine Biology University of Rostock
2010 Diploma Thesis Der Einfluss der Termitentaxa Macrotermes michaelseni und Odontotermes sp. (Isoptera, Macrotermitinae) auf Pflanzenwachstum und Pflanzenzersetzung in der Dornbuschsavanne Zentralnamibias Animal Ecology & Tropical Biology, University of Würzburg
2003-2010 Studies Biology (German Diploma): Animal Ecology & Tropical Biology (main subject), Ecophysiology & Vegetation Ecology (minor subject), Behavioral Physiology & Sociobiology (minor subject), Ecological microbiology, parasite immunology & virology (minor subject) University of Würzburg
Stays abroad    
05/2018-07/2018 Research stay at the "Advanced Laboratory of Primary Production" of the University of Malága with the project "Carbon balance and photosynthetic yield of kelps" funded by the Hermes programme
02/2016-04/2016 Research stay for method development on carbohydrate quantification, analysis and synthesis of data, preparation of joint publication at the Centro de Investigación y desarrollo tecnológico en Algas (CIDTA), Chile funded by FONDECYT
03/2012-07/2012 Master thesis at the Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile funded by a PROMOS scholarship of the DAAD
02/2008-06/2008 Diploma thesis in Namibia within the framework of BIOTA Southern Africa Department of Animal Ecology & Tropical Biology, University of Würzburg
08/2006-10/2006 Field practical work in the Gunung Mulu National Park Sarawak (Borneo) Malaysia supported by the DAAD

Contact Details

Dr. Angelika Graiff
University of Rostock
Institute for Biological Sciences
Applied Ecology and Phycology
Albert-Einstein-Str. 21
D-18059 Rostock
Phone +49 381 498 6101
Fax. +49 381 498 6072

Angelika Graiff
Kelp forest off Heligoland (Photo: Florian Huber, submaris)
Bladder wrack (Fucus vesiculosus) in the Baltic Sea (Photo: Angelika Graiff).

Please note: Once you watch the video, data will be transmitted to Youtube/Google. For more information, see Google Privacy.