A type of phytoplankton important for carbon storage in marine environments is declining in the Southern Ocean, possibly because of climate change, researchers reported in Geophysical Research Letters. Emiliania huxleyi secretes a calcite shell, helping transport carbon dioxide from the surface into the deeper reaches. From 1998 to 2014, there was about a 4 percent reduction in the calcification rate during the summer months in the Southern Ocean.
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