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Part of Oceanic temperature shifts linked to the El Niño Southern Oscillation are causing significant disruptions to marine ecosystems globally.

How could ocean warming and extremes linked to El Niño affect British Columbia?

Possible What happens if… A possibility worth considering, not a forecast.

Ocean warming may disrupt fish stocks and change B.C. fisheries Ocean warming and extreme events linked to El Niño are projected to disrupt marine food webs and change the species available in British Columbia's waters. Global studies indicate that unusually high ocean temperatures and low primary production can substantially increase the likelihood of extremely low fish catches. Furthermore, long-term warming is linked to declining Pacific salmon populations and expected long-term declines in fish biomass, forcing fisheries to adapt to new conditions.

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How it reaches British Columbia

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The facts so far

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  • Two consecutive extreme temperature years increased the likelihood of extremely low catch by 40 per cent globally.theconversation.com
  • Declining Pacific salmon populations have been linked to ocean warming and are affected at all stages of their life cycle.theconversation.com
  • Fish biomass is also expected to decline over the long term under climate change.theconversation.com
  • The North Pacific has warmed faster than any other ocean basin since 2013.theconversation.com

Why it matters

The fisheries sector in British Columbia relies heavily on stable marine ecosystems and predictable fish populations. Long-term declines in fish biomass and the increased likelihood of extremely low catches pose a significant economic and operational risk to fishing communities. The reports emphasize that much of the near-term climate risk to fish and fisheries is already locked in, requiring immediate adaptation strategies.

Globally, marine species are moving to new locations as they follow favorable ocean conditions, a trend seen during past marine heatwaves. This shift is part of a larger climate challenge, where extreme events are unfolding on top of an already warmer baseline, increasing the challenges for fishers worldwide.

What we don't know yet

  • What specific early warning systems or climate-informed plans are currently available to B.C. fisheries managers?
  • How will the increased frequency and intensity of extreme events affect the ability of B.C. fisheries to adapt?

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What would change this answer

Extreme events become more frequent and intenseThe risk of extremely low fish catches and the disruption of marine food webs in B.C. would increase significantly.
Stronger emission reductions are achievedThe long-term rate of ocean warming and the compounding stress on fish stocks could be limited.

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The full eventOcean Warming and El Niño Linked to Shifts in Fish Stocks Off British Columbia Everything aboutBritish Columbia

Brind's analysis is written by AI from the reporting linked above and can be wrong. This explainer is a possibility worth considering, not a forecast: steps marked as Brind's reasoning are not stated in the reporting. It is not investment advice; do your own research.