Pilot Assessment of Primary Productivity OSPAR Convention The Convention for the Protection of the Marine Environment of the North-East Atlantic (the "OSPAR Convention") was opened for signature at the Ministerial Meeting of the former Oslo and Paris Commissions in Paris on

• Main Authors: Louchart, Arnaud, Lizon, Fabrice, Claquin, Pascal, Artigas, Luis Felipe, Tilstone, Gavin
• Other Authors: Royal Netherlands Academy of Arts and Sciences (KNAW), Université du Littoral Côte d'Opale (ULCO), Université de Lille, Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG), Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Plymouth Marine Laboratory (PML), European Union’s DG ENV/MSFD 2020, under agreement No.110661/2020/839628/SUB/ENV.C.2, European Project: NEA PANACEA
• Format: Book Part
• Language: English
• Published: HAL CCSD 2023
• Subjects: [SDE]Environmental Sciences; [SDV]Life Sciences [q-bio]; North East Atlantic
• Online Access: https://hal.science/hal-04404191; https://hal.science/hal-04404191/document; https://hal.science/hal-04404191/file/p00950_fw2_qsr2023.pdf

International audience Primary production sustains the functioning of marine food webs. Over the long-term (1997-2019) primaryproduction was stable in the Greater North Sea, Celtic Seas and Bay of Biscay and Iberian Coast. Significantdecreases occurred 2015-2019, likely driven by reduced nutrient availability and climate change, which maydisturb higher trophic levels.