Journal ArticleDOI
Large-scale redistribution of maximum fisheries catch potential in the global ocean under climate change
William W. L. Cheung,William W. L. Cheung,Vicky W. Y. Lam,Jorge L. Sarmiento,Kelly A. Kearney,Reg Watson,Dirk Zeller,Daniel Pauly +7 more
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TLDR
In this article, the authors show that climate change may lead to large-scale redistribution of global catch potential, with an average of 30-70% increase in high-latitude regions and a drop of up to 40% in the tropics.Abstract:
Previous projection of climate change impacts on global food supply focuses solely on production from terrestrial biomes, ignoring the large contribution of animal protein from marine capture fisheries. Here, we project changes in global catch potential for 1066 species of exploited marine fish and invertebrates from 2005 to 2055 under climate change scenarios. We show that climate change may lead to large-scale redistribution of global catch potential, with an average of 30-70% increase in high-latitude regions and a drop of up to 40% in the tropics. Moreover, maximum catch potential declines considerably in the southward margins of semienclosed seas while it increases in poleward tips of continental shelf margins. Such changes are most apparent in the Pacific Ocean. Among the 20 most important fishing Exclusive Economic Zone (EEZ) regions in terms of their total landings, EEZ regions with the highest increase in catch potential by 2055 include Norway, Greenland, the United States (Alaska) and Russia (Asia). On the contrary, EEZ regions with the biggest loss in maximum catch potential include Indonesia, the United States (excluding Alaska and Hawaii), Chile and China. Many highly impacted regions, particularly those in the tropics, are socioeconomically vulnerable to these changes. Thus, our results indicate the need to develop adaptation policy that could minimize climate change impacts through fisheries. The study also provides information that may be useful to evaluate fisheries management options under climate change.read more
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Journal ArticleDOI
Climate Change and Food Systems
TL;DR: In this paper, the impacts of global climate change on food systems are expected to be widespread, complex, geographically and temporally variable, and profoundly influenced by socioeconomic conditions, and some synergies among food security, adaptati...
Journal ArticleDOI
Contrasting futures for ocean and society from different anthropogenic CO2 emissions scenarios
Jean-Pierre Gattuso,Jean-Pierre Gattuso,Alexandre K. Magnan,Raphaël Billé,William W. L. Cheung,Ella L. Howes,Fortunat Joos,D. Allemand,Laurent Bopp,Sarah R. Cooley,C. M. Eakin,Ove Hoegh-Guldberg,Ryan P. Kelly,Hans-Otto Pörtner,Alex Rogers,John M. Baxter,D. Laffoley,D. Osborn,Aleksandar Rankovic,Julien Rochette,Ussif Rashid Sumaila,Sébastien Treyer,Carol Turley +22 more
TL;DR: The physics, chemistry, and ecology of the oceans might be affected based on two CO2 emission trajectories: one business as usual and one with aggressive reductions, consistent with the Copenhagen Accord of keeping mean global temperature increase below 2°C in the 21st century.
Journal ArticleDOI
Dynamics and distribution of natural and human-caused hypoxia
TL;DR: In this paper, the authors pointed out that the formation of hypoxic areas has been exacerbated by any combination of interactions that increase primary production and accumulation of organic carbon leading to increased respiratory demand for oxygen below a seasonal or permanent pycnocline, and the consequences of eutrophication-induced hypoxia can be reversed if longterm, broad-scale, and persistent efforts to reduce substantial nutrient loads are developed and implemented.
Journal ArticleDOI
Pervasive human-driven decline of life on Earth points to the need for transformative change
Sandra Díaz,Josef Settele,Josef Settele,Eduardo S. Brondizio,Hien T. Ngo,John Agard,Almut Arneth,Patricia Balvanera,Kate A. Brauman,Stuart H. M. Butchart,Stuart H. M. Butchart,Kai M. A. Chan,Lucas Alejandro Garibaldi,Kazuhito Ichii,Kazuhito Ichii,Jianguo Liu,Suneetha M. Subramanian,Suneetha M. Subramanian,Guy F. Midgley,Patricia Miloslavich,Patricia Miloslavich,Zsolt Molnár,David Obura,Alexander Pfaff,Stephen Polasky,Andy Purvis,Andy Purvis,Jona Razzaque,Belinda Reyers,Belinda Reyers,Rinku Roy Chowdhury,Yunne-Jai Shin,Yunne-Jai Shin,Ingrid J. Visseren-Hamakers,Ingrid J. Visseren-Hamakers,Katherine J. Willis,Katherine J. Willis,Cynthia N. Zayas +37 more
TL;DR: The first integrated global-scale intergovernmental assessment of the status, trends, and future of the links between people and nature provides an unprecedented picture of the extent of the authors' mutual dependence, the breadth and depth of the ongoing and impending crisis, and the interconnectedness among sectors and regions.
Journal ArticleDOI
Signature of ocean warming in global fisheries catch
TL;DR: This study shows that ocean warming has already affected global fisheries in the past four decades, highlighting the immediate need to develop adaptation plans to minimize the effect of such warming on the economy and food security of coastal communities, particularly in tropical regions.
References
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Spreading Dead Zones and Consequences for Marine Ecosystems
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TL;DR: Dead zones in the coastal oceans have spread exponentially since the 1960s and have serious consequences for ecosystem functioning, exacerbated by the increase in primary production and consequent worldwide coastal eutrophication fueled by riverine runoff of fertilizers and the burning of fossil fuels.
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