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Threats to coral reefs from increasing concentrations of dissolved carbon dioxide

  • over 500 billion tonnes of co2 has been released by humans since start of industrial Rev and has dissolved into sea
  • pH level was 8.179 in 18th century now it is 8.069- small changes represents 30% acidification
  • marine animals such as reef building corals that deposit calcium carbonate in their Skelton need to absorb carbonate ions from sea water- dissolved co2 makes carbons ion conc even lower
    Makes it difficult for reef building coral to absorb them to make them skeletons

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