High CO2 environment damages reefs
Reefs may erode in areas with high carbon dioxide levels because the
"glue" binding coral skeletons to larger reef structures is missing, a
U.S. study says.
The
study found coral reefs in the eastern tropical Pacific Ocean offer a
real-world example of the reef ecosystems will face under high carbon
dioxide conditions resulting in ocean acidification(becoming an acid),
the National Oceanic and Atmospheric Administration(NOAA) said in a
release.
Derek Manzello, a coral reef ecologist at NOAA's Atlantic
Oceanographic and Meteorological Laboratory in Miami, and his colleagues
analysed cements within reef framework structures from the eastern
tropical Pacific, a region having naturally higher levels of carbon
dioxide.
They compared those structures to reefs from the Bahamas, with
comparatively lower carbon dioxide levels. Ocean acidification seems to
result in a reduction in the production of the cements that allow coral
reefs to grow into large, structurally-strong formations, the scientists
said.
"Reefs are constantly degraded by mechanical, biological, and
chemical erosion," said Manzello. "This study indicates that poorly
cemented reefs that develop in an acidic ocean will be much less likely
to withstand this persistent erosion."
-UPI
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