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Climate change and fisheries

Under the highest-emission scenario, many countries would see substantial reductions in seafood available from exclusive economic zones by 2050.[1]

Fisheries are affected by climate change in many ways: marine aquatic ecosystems are being affected by rising ocean temperatures,[2] ocean acidification[3] and ocean deoxygenation, while freshwater ecosystems are being impacted by changes in water temperature, water flow, and fish habitat loss.[4] These effects vary in the context of each fishery.[5] Climate change is modifying fish distributions[6] and the productivity of marine and freshwater species. Climate change is expected to lead to significant changes in the availability and trade of fish products.[7] The geopolitical and economic consequences will be significant, especially for the countries most dependent on the sector. The biggest decreases in maximum catch potential can be expected in the tropics, mostly in the South Pacific regions.[7]: iv 

The impacts of climate change on ocean systems has impacts on the sustainability of fisheries and aquaculture, on the livelihoods of the communities that depend on fisheries, and on the ability of the oceans to capture and store carbon (biological pump). The effect of sea level rise means that coastal fishing communities are significantly impacted by climate change, while changing rainfall patterns and water use impact on inland freshwater fisheries and aquaculture.[8] Increased risks of floods, diseases, parasites and harmful algal blooms are climate change impacts on aquaculture which can lead to losses of production and infrastructure.[7]

It is projected that "climate change decreases the modelled global fish community biomass by as much as 30% by 2100".[9]

  1. ^ Cheung, William W. L.; Maire, Eva; Oyinlola, Muhammed A.; Robinson, James P. W.; Graham, Nicholas A. J.; Lam, Vicky W. Y.; MacNeil, M. Aaron; Hicks, Christina C. (30 October 2023). "Climate change exacerbates nutrient disparities from seafood". Nature Communications. 13 (11): 1242–1249. Bibcode:2023NatCC..13.1242C. doi:10.1038/s41558-023-01822-1. PMC 10624626. PMID 37927330.
  2. ^ Observations: Oceanic Climate Change and Sea Level Archived 2017-05-13 at the Wayback Machine In: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. (15 MB).
  3. ^ Doney, S. C. (March 2006). "The Dangers of Ocean Acidification" (PDF). Scientific American. 294 (3): 58–65. Bibcode:2006SciAm.294c..58D. doi:10.1038/scientificamerican0306-58. PMID 16502612.
  4. ^ US EPA, OAR (2015-04-07). "Climate Action Benefits: Freshwater Fish". US EPA. Retrieved 2020-04-06.
  5. ^ Weatherdon, Lauren V.; Magnan, Alexandre K.; Rogers, Alex D.; Sumaila, U. Rashid; Cheung, William W. L. (2016). "Observed and Projected Impacts of Climate Change on Marine Fisheries, Aquaculture, Coastal Tourism, and Human Health: An Update". Frontiers in Marine Science. 3. doi:10.3389/fmars.2016.00048. ISSN 2296-7745.
  6. ^ Cheung, W.W.L.; et al. (October 2009). Redistribution of Fish Catch by Climate Change. A Summary of a New Scientific Analysis (PDF). Sea Around Us (Report). Archived from the original (PDF) on 2011-07-26.
  7. ^ a b c Manuel Barange; Tarûb Bahri; Malcolm C. M. Beveridge; K. L. Cochrane; S. Funge Smith; Florence Poulain, eds. (2018). Impacts of climate change on fisheries and aquaculture: synthesis of current knowledge, adaptation and mitigation options. Rome: Food and Agriculture Organization of the United Nations. ISBN 978-92-5-130607-9. OCLC 1078885208.
  8. ^ Intergovernmental Panel on Climate Change (IPCC), ed. (2022), "Sea Level Rise and Implications for Low-Lying Islands, Coasts and Communities", The Ocean and Cryosphere in a Changing Climate: Special Report of the Intergovernmental Panel on Climate Change, Cambridge: Cambridge University Press, pp. 321–446, doi:10.1017/9781009157964.006, ISBN 978-1-00-915796-4, S2CID 246522316, retrieved 2022-04-06
  9. ^ Carozza, David A.; Bianchi, Daniele; Galbraith, Eric D. (2019). Bates, Amanda (ed.). "Metabolic impacts of climate change on marine ecosystems: Implications for fish communities and fisheries". Global Ecology and Biogeography. 28 (2): 158–169. Bibcode:2019GloEB..28..158C. doi:10.1111/geb.12832. ISSN 1466-822X. S2CID 91507418.

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