17 Sep 2012:
Most Coral Reefs At Risk
Even if Warming Limited to 2 Degrees C
Most of the world’s coral reefs will likely be subject to long-term degradation even if global warming is limited to 2 degrees Celsius
, and as much as one-third of coral reef systems will likely be vulnerable to threats even under the most optimistic climate projections, a new study says. In an analysis of the
In Fight to Save Coral Reefs,
Finding Strategies that Work
In four decades as a marine biologist, Nancy Knowlton
has played a key role in documenting the biodiversity of coral reefs and the threats they increasingly face. In an interview with Yale e360
, she highlights conservation projects that offer hope of saving these irreplaceable ecosystems.
potential effects of heat stress on coral reef systems worldwide under different climate change scenarios, a team of researchers found that most potential outcomes will likely trigger more frequent and intense mass-bleaching events. If global mean temperature increases exceed 2 degrees C, coral reefs “might no longer be prominent coastal ecosystems,” said Katja Frieler, a researcher at the Potsdam Institute for Climate Impact Research and lead author of the study, published in the journal Nature Climate Change
. Under the most optimistic scenarios — including aggressive climate mitigation and assumptions that coral systems can adapt to warming conditions — one third of the world’s coral reef systems would still be subject to severe degradation, the study said. “Without a yet-uncertain process of adaptation or acclimation, however, already about 70 percent of corals are projected to suffer from long-term degradation by 2030 even under an ambitious mitigation scenario,” Frieler said. According to researchers, the likely threshold to preserve at least half of the world’s coral reefs would be a global mean temperature increase of less than 1.5 degrees C.
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.
is now available for mobile devices at e360.yale.edu/mobile
The 2015 Yale e360 Video Contest winner documents a Northeastern town's bitter battle over a wind farm. Watch the video.
A 2015 Yale e360 Video Contest winner captures stunning images of wild salmon runs in Alaska. Watch the video.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
video goes onto the front lines with Colorado firefighters confronting deadly blazes fueled by a hotter, drier climate. Watch the video.
A three-part series Tainted Harvest
looks at the soil pollution crisis in China, the threat it poses to the food supply, and the complexity of any cleanup. Read the series.