global change will impact the Southern Ocean ecosystem. The availability of trace metals, in particular iron, is considered the key factor in controlling Southern Ocean phytoplankton productivity and community [...] CO2 has already caused significantly higher aquatic CO2 concentrations and lower pH values (‘ocean acidification’) compared to pre-industrial times potentially affecting plankton community structure as well [...] contrasting water masses from the Southern Ocean; namely the naturally iron-enriched waters of the Antarctic Peninsula and the South Orkney Islands and two open ocean sites of the iron-limited waters of the

ng of colonisation and expatriation processes. Projects BioAcid II: Biological Impacts of Ocean Acidification ( www.bioacid.de ) Cleopatra: Climate effects on planktonic food quality and trophic transfer [...] physiological responses of dominant species to climate chance to predict their role in the future Arctic Ocean. Feeding biology and trophic interactions of key species Who feeds who“ is one of the major factors [...] ( www.mare-incognitum.no/index.php/cleopatra-ii ) Transdrift: The transpolar system of the Arctic Ocean: ( www.transdrift.info ) Fram: Frontiers in Arctic Monitoring Members of the working group PD. Dr

all latitudes. Cold-water corals (CWC) have long been considered particularly vulnerable to ocean acidification, but in the naturally acidified fjords of Patagonian Chile, we found large populations of CWC

survivability of marine organisms. In this context, Pörtner and his team inves- tigate how ocean warming, ocean acidification and the increasing lack of oxygen are affecting vital biochemical processes in marine [...] years and is now one of the world’s leading experts on the impact of climate change on life in the ocean. His scientific career began in Münster and Düsseldorf, where he studied biology and wrote his di [...] Assessment Report. He was jointly responsible for the IPCC’s three special reports on 1.5 °C, Land and Ocean, and the Cryosphere, and served as Co-Chair of the IPCC’s afore- mentioned Working Group II for the

CO2 concentration and pH in the present Southern Ocean. Phytoplankton ecology in the present Southern Ocean. Southern Ocean phytoplankton are major drivers of global carbon cycling accounting for ~2 Pg [...] strongly governs Southern Ocean phytoplankton productivity. CO2 concentration and pH in the future Southern Ocean. Figure: S. Trimborn Phytoplankton ecology in the future Southern Ocean. Climate models indicate [...] Fe-limited oceanic waters Inorganics in organics: Chemical and biological controls on micronutrient and carbon fluxes in the polar ocean Iron limitation and cycling in contrasting Southern Ocean Provinces

to the impacts of climate change on ocean life, and from 2015 to 2017 worked on a major project funded by the federal govern- ment to investigate ocean acidification (BioAcid). When this project ended, [...] concerning the ecology and composition of communities living on the floor of the North Sea and Southern Ocean, conducted by the Comparative Ecosystem Research Section of the Alfred Wegener Institute (AWI) in

with reduced or zero waste • Potential of shellfish as sink for CO2 and of algae to mitigate ocean acidification • Identify industry barriers for production of seed of low trophic species • New and novel [...] aquaculture network along and across the Atlantic Ocean Atlantic Consortium AquaVitae will contribute to the Belém Statement, the joint Declaration on Atlantic Ocean Research and Innovation Cooperation between [...] it contains. AquaVitae Project Unlocking the Potential of Sustainable Aquaculture in the Atlantic Ocean www.aquavitaeproject.eu Hatchery & Seedling Production Post Hatchery & Seedling to Harvest Processes

changes in biogeochemical and planktonic parameters due to fast temperature increase and acidification of the Arctic Ocean. Team Dr. Eva-Maria Nöthig (coordinator, phytoplankton ecology & particle flux) Prof

ankton, Karakuş et al., 2022 ), and to include the sensitivity of phytoplankton growth to ocean acidification ( Seifert et al., 2022 ). Main REcoM references (chronological order): •[3 phytoplankton functional [...] M., Hagen, W., Hauck, J., 2022. The Role of Zooplankton Grazing and Nutrient Recycling for Global Ocean Biogeochemistry and Phytoplankton Phenology. JGR Biogeosciences 127. doi.org/10.1029/2022JG006798 [...] Resplandy, L., Rödenbeck, C., Schwinger, J., Séférian, R., 2020. Consistency and Challenges in the Ocean Carbon Sink Estimate for the Global Carbon Budget. Front. Mar. Sci. 7, 571720. doi.org/10

lower temperature will lead to reduced performance while ocean acidification may be negligible most studies found no effect of ocean acidification on cold- water corals; though less abundant in areas 1 T: [...] farms Co-PI: Marlene Wall, Claudio Richter, Ute Hentschel ©U. Pörschmann ST 6.4 Use and misuse of the ocean: Consequences for marine ecosystems Lozano-Muñoz et al. 2021 An integrated holobiont view on cold-water