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Ocean Warming Threatens Essential Phytoplankton, Study Warns

9/8/2025

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Story summary
  • Research shows Prochlorococcus, essential marine phytoplankton, may decline significantly due to rising ocean temperatures.
  • A study in Nature Microbiology predicts a potential 50% population reduction in tropical oceans over 75 years.
  • Prochlorococcus is vital for global photosynthesis, contributing about 20% of Earth's oxygen.
  • Lead author François Ribalet warns that population declines threaten ecological balance and biodiversity.
  • The study reveals heat-tolerant strains may not survive extreme temperatures, compounded by plastic pollution.