project. Main goals of the hatchery are to produce seed oysters for native oyster restoration in the North Sea and to address relevant research questions in the field. The European flat oyster is functionally [...] techniques with the defined goal to produce spat for mid- and large-scale restoration measures in the North Sea. This requires adaptation and optimization of commercial production techniques, which includes a [...] species ( Rhodomonas salina, Isochrysis galbana and Chaetoceros neogracilis ), native to the German North Sea around Helgoland. The microalgae production is a crucial part of hatchery production. Here, parameters

PROCEED Restoration of the European Oyster in the German North Sea: Establishment of a sustainable oyster seed production for a long-term restoration program Project duration 2018 – 2025 The European oyster [...] oyster Ostrea edulis , once a widespread native species in the North Sea, is considered functionally extinct in some regions due to intensive fishing. As an ecological key species, oysters provided several [...] Bérenger Colsoul (Thünen Institut) Film PROCEED - Restoration of the European Oyster in the German North Sea (film) Website release Online knowledge portal about the European native oyster Press release Rollup

Sell, SEA Pineda-Metz, M Wegner, S Brand, LNS Shama, J Wollschläger, TH Badewien, S Laakmann, & KH Wiltshire. Connectivity and larval drift across Marine Protected Areas in the German Bight, North Sea, Part [...] Connectivity and larval drift across marine protected areas in the German bight, North Sea: Necessity of stepping stones. Journal of Sea Research, 204 , 102563. doi.org/10.1016/j.seares.2025.102563 . 2024 [...] oyster ( Ostrea edulis ) in the German North Sea (RESTORE preliminary investigation). BfN-Schriften 684. BfN, Germany. doi.org/10.19217/skr684 . 2023. SEA Pineda‐Metz, B Colsoul, M Niewöhner, T

Knowledge transfer With the disappearance of the European oyster from the North Sea, general knowledge about this once important for society species has also been lost: Oyster fishery was still considered

RESTORE Restoration of European oyster ( Ostrea edulis ) stocks in the German North Sea Project duration: 2016 – 2025 Within the framework of the testing and development project (german: “Erprobungs- und [...] procedures for sustainable stock restoration of the European oyster Ostrea edulis in the German North Sea are being developed for the first time, as well as implemented and tested in practice on a model [...] develop a comprehensive restoration program aiming to reestablish, at selected sites of the German North Sea, healthy populations of the highly endangered oyster species, as well as the oyster reef ecosystem

endangered species in Europe, and of the oyster reef ecosystem at selected sites in the German North Sea. The following objectives are in focus: Establish a pilot oyster reef in the “Borkum Reef ground” [...] technologies Development of a work frame for further oyster restoration measures in the German North Sea Exclusive Economic Zone (guideline) Pilot tests in the nature reserve “Helgoländer Felssockel” The [...] rates to those in the RESTORE preliminary study ? Are they adapted to the new habitat in the deep North Sea? Do they survive there? When do the oysters reach sexual maturity? In addition to the oysters themselves

Transpolar Drift carries sea ice, fresh water, and suspended matter from the Siberian shelves across the central Arctic towards the Fram Strait channel, which connects to the Nordic Seas. This cross-Arctic flow [...] including microplastics and heavy metals – from Siberian river systems into the central Arctic and the North Atlantic. This material affects Arctic biogeochemistry and ecosystems, while the fresh water itself

provision: Markus Brand (Heligo.) Max Schwanitz (Bremerh.) Diving operations management: (Heligoland, North Sea, Arctic) Markus Brand Max Schwanitz Miriam Lienkämper Scientific projects, Heligoland & AWIPEV: [...] Project directorate: Detlef Wilde Technical project lead: Jan Meier Other Expeditions Land expeditions north: Dirk Mengedoht Verena Mohaupt Land expeditions south: Christine Wesche Other ship expeditions: Derk

in the North- and Baltic Seas was a collaborative project with the German Federal Maritime and Hydrographic Agency (BSH). The project focused on concentrations of algae and oxygen in the North Sea and Baltic [...] Agency (BSH) in the North and Baltic Seas. The data assimilation system uses PDAF and the operational model HBM coupled to the ecosystem model ERGOM and focused on the assimialtion of sea surface temperature [...] be improved by data assimilation, for example by utilizing satellite observations of sea surface temperature or sea surface height. Similarly, ocean-biogeochemical models can profit from the incorporation

Schroeder, A. Ridout, L. Nerger (2023) The effects of assimilating a sub-grid-scale sea ice thickness distribution in a new Arctic sea ice data assimilation system. The Cryosphere , 17, 2509–2532, ​ doi:10.519 [...] M., Nerger, L., Mu, L., Yang, Q., Liu, C. (2019) Using sea surface temperature observations to constrain upper ocean properties in an Arctic sea ice-ocean data assimilation system. J. Geophys. Res. Oceans [...] M., Losa, S.N., Ricker, R., Nerger, L., Liang, X. (2018) Improving sea ice thickness estimates by assimilating CryoSat-2 and SMOS sea ice thickness data simultaneously. Quarterly Journal of the Royal