Dr. Angelika Graiff

• 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

 “Seasonal kelp primary production at a rocky shore site: Integrating physiology and biochemistry into ecological modelling” funded by DFG (GR5088/2-1).

CLiPA: Climate-friendly offshore production of algal biomass (funded by the DBU).

Franke, K., Kroth, F., Karsten, U., Bartsch, I., Iñiguez C. & Graiff, A. (2024) Varying photosynthetic quotients strongly influence net kelp primary production and seasonal differences increase under warming. Frontiers in Marine Science. https://doi.org/10.3389/fmars.2024.1455706

Franke, K., Bartsch, I., Karsten, U. & Graiff, A. (2024) Seasonality influences the effect of warming on kelp photosynthesis. Marine Ecology Progress Series. 739, 15-29; https://doi.org/10.3354/meps14623

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