Articles | Volume 22, issue 21
https://doi.org/10.5194/bg-22-6583-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-6583-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
07 Nov 2025
Research article |
| 07 Nov 2025
| 07 Nov 2025
Marine heatwaves deeply alter marine food web structure and function
Vianney Guibourd de Luzinais
CORRESPONDING AUTHOR
UMR Dynamics and Sustainability of Ecosystems: From Source to Sea (DECOD), Institut Agro, Ifremer, INRAE, Rennes, France
Institute for the Oceans and Fisheries, The University of British Columbia, Vancouver, British Columbia, Canada
William W. L. Cheung
Institute for the Oceans and Fisheries, The University of British Columbia, Vancouver, British Columbia, Canada
Didier Gascuel
UMR Dynamics and Sustainability of Ecosystems: From Source to Sea (DECOD), Institut Agro, Ifremer, INRAE, Rennes, France
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Marina Lévy, Karina von Schuckmann, William Cheung, Joachim Claudet, Thomas L. Frölicher, Patrice Guillotreau, Peter Haugan, Janine Adams, Diva Amon, Tamatoa Bambridge, Cynthia Barzuna, Bruno Blanke, Lijing Cheng, Sanae Chiba, Jorge Cortés, Pierre Friedlingstein, Jean-Pierre Gattuso, Stefan Gelcich, Jessica Gephart, Deborah Greaves, Audrey Hasson, Claire Jolly, Daoji Li, Yunne-Jai Shin, Aimée Slangen, Mere Takoko, Olivier Thébaud, Adrien Vincent, and Patrick Vincent
State Planet Discuss., https://doi.org/10.5194/sp-2026-1, https://doi.org/10.5194/sp-2026-1, 2026
Preprint under review for SP
Short summary
Short summary
The Starfish Barometer provides an annual, science-based synthesis of global Ocean-related developments, structured around five interconnected dimensions: the Ocean state, human pressures, societal harms, protection efforts, and opportunities for humanity. It is released each year on World Ocean Day. This article presents the second edition of the Barometer, which shows a growing gap between increasing human pressures on the Ocean and the efforts being made to protect it and drive change.
Anne L. Morée, Fabrice Lacroix, William W. L. Cheung, and Thomas L. Frölicher
Biogeosciences, 22, 1115–1133, https://doi.org/10.5194/bg-22-1115-2025, https://doi.org/10.5194/bg-22-1115-2025, 2025
Short summary
Short summary
Using novel Earth system model simulations and applying the Aerobic Growth Index, we show that only about half of the habitat loss for marine species is realized when temperature stabilization is initially reached. The maximum habitat loss happens over a century after peak warming in a temperature overshoot scenario peaking at 2 °C before stabilizing at 1.5 °C. We also emphasize that species adaptation may be key in mitigating the long-term impacts of temperature stabilization and overshoot.
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Short summary
Marine heatwaves (MHWs) have become more frequent and intense, yet their impacts on marine ecosystems globally remain unclear. Using a novel ecological model, we show that MHWs significantly reduced marine ecosystem biomass between 1998 and 2021, especially in the North Pacific Ocean. Marine predators are more impacted than organisms lower in the food chain. This study underscores the urgent need to integrate MHWs into developing climate-resilient marine ecosystem management and conservation plans.
Marine heatwaves (MHWs) have become more frequent and intense, yet their impacts on marine...
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