Climate change threat to Scotland’s seabed

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One of Scotland’s most important marine ecosystems is at risk of almost vanishing if climate change continues at the current rate, scientists have warned.New modelling shows the majority of maerl beds will disappear if action isn’t taken to slow global warming.The maerl beds form a spiky “carpet” on the seabed and are an important habitat for smaller marine plants and animals.But rising sea temperatures are putting the reef-like beds at risk.Experts from the Lyell Centre in Edinburgh, a collaboration between Heriot-Watt University and the British Geological Survey, have modelled the impact on maerl beds of various climate change scenarios.

They found that even in the best-case option, where greenhouse gas emissions fell significantly, about 38% of Scotland’s maerl beds would still be lost by 2100.In the worst case scenario, about 84% of our maerl beds would disappear by the end of this century. PhD student Cornelia Simon-Nutbrown, who led the research, said: “Maerl beds’ survival depends on us making major changes to our greenhouse gas emissions and protecting the beds from anthropogenic activities.”Although maerl beds – also known as red coralline beds – are found all over the world, Scotland provides their European stronghold.They are found …

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