The unsustainability of the Omega-3 supply from seafood in the Mediterranean under global change
研究了2000-2023年间地中海当地渔业上岸的Omega-3供应变化，发现冷水鱼类的Omega-3因过度捕捞和气候变暖而下降，暖水鱼类的增加无法弥补，未来海鲜自给Omega-3面临严重风险。
• First study on the long-term Omega-3 supply from local Mediterranean fisheries. • Examines species trade-offs based on temperature preference. • The increase in Omega-3 from warm-water species could not offset the decline from temperate and cold-water species. • The Omega-3 supply is affected by both the poor status of stocks and by sea warming. • Future Omega-3 self-sufficiency from seafood is at serious risk. This study, for the first time, examines the evolution of Omega-3 supply landed by local fisheries over time in the Mediterranean Sea, while considering trade-offs between species with varying temperature preferences. The province of Girona (northwestern Mediterranean, Spain) is used as our case study. Our results show that, between 2000 and 2023, there was a strong declining trend in the Omega-3 supplied by temperate and cold-water species (which have been negatively affected by overexploitation and climate change), and that this has not been compensated by the increase in the Omega-3 supplied by warm-water species (which have benefited from climate change). Considering the poor status of the Mediterranean stocks and the negative impacts of sea warming on Omega-3 production, our study provides empirical evidence that the self-sufficiency of Omega-3 supplied by seafood for future generations is far from assured.