Dupont L. auteur aut IRD Le Mezo P. auteur aut IRD Aumont Olivier auteur aut IRD Bopp L. auteur aut IRD Clerc C. auteur aut IRD Ethe C. auteur aut IRD Maury Olivier auteur aut IRD text journalArticle eng text/pdf born digital access Despite recurrent emphasis on their ecological and economic roles, the importance of high trophic levels (HTLs) on ocean carbon dynamics, through passive (fecal pellet production, carcasses) and active (vertical migration) processes, is still largely unexplored, notably under climate change scenarios. In addition, HTLs impact the ecosystem dynamics through top-down effects on lower trophic levels, which might change under anthropogenic influence. Here we compare two simulations of a global biogeochemical-ecosystem model with and without feedbacks from large marine animals. We show that these large marine animals affect the evolution of low trophic level biomasses, hence net primary production and most certainly ecosystem equilibrium, but seem to have little influence on the 21st-century anthropogenic carbon uptake under the RCP8.5 scenario. These results provide new insights regarding the expectations for trophic amplification of climate change through the marine trophic chain and regarding the necessity to explicitly represent marine animals in Earth System Models. specialized climate change Earth System Model feedbacks high trophic levels trophic cascades 021 036 020 29 6 1545-1556 2023 1354-1013 https://www.documentation.ird.fr/hor/fdi:010086786 10.1111/gcb.16558 1354-1013 [F B010086786] https://www.documentation.ird.fr/hor/fdi:010086786 https://www.documentation.ird.fr/intranet/publi/2023-02/010086786.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2023-02-08 2025-02-24 fdi:010086786 fre