A massive new report shows just how much climate change is killing the world's coral reefs
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Rising ocean temperatures killed about 14% of the world's coral reefs in just under a decade, according to a new analysis from the Global Coral Reef Monitoring Network.
Put another way: The amount of coral lost between 2008 and 2019
is equivalent to more than all of the living coral in Australia.
The report the first of its kind since 2008 found that
warming caused by climate change, overfishing, coastal development and
declining water quality has placed coral reefs around the world under
"relentless stress."
Image credit Yahoo news
But it also found signs of hope, noting that many of these reefs
are resilient and may be able to recover if immediate action is taken to
stabilize emissions and fight future warming.
"People around the world depend on healthy coral reefs and
the services they provide for food, income, recreation, and protection from
storms,” said Jennifer Koss, director of the National Oceanic and Atmospheric
Administration's Coral Reef Conservation Program. “It is possible to turn the
tide on the losses we are seeing, but doing so relies on us as a global
community making more environmentally conscious decisions in our everyday
lives.”
NOAA calls this the largest global
analysis of coral reef health ever undertaken: "The
analysis used data from nearly two million observations from more than 12,000
collection sites in 73 countries over a time span of 40 years (1978 to 2019),
representing the work over over 300 scientists."
The study covers 10 coral reef-bearing regions around the world,
and identifies "coral bleaching events caused by elevated sea surface
temperatures" as the biggest driver of coral loss. Researchers looked at
levels of both algae and live hard coral cover, a scientifically based
indicator of reef health.
"This indicates that coral reefs are still resilient and if
pressures on these critical ecosystems ease, then they have the capacity to
recover, potentially within a decade, to the healthy, flourishing reefs that
were prevalent pre-1998," reads a GCRMN
release.
On the flip side, continued warming could take an even greater
toll.
Sharp declines in coral cover corresponded with increases in sea
surface temperature, which experts say shows coral's vulnerability to spikes a phenomenon they say is likely to happen more frequently as the planet
continues to warm.
Read more from
NPR's climate team about why coral reefs are so crucial, and
exactly how much of a reduction in greenhouse gas emissions is needed to
preserve them.
This story originally appeared on the Morning Edition liveblog.
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