We call on all societies and governments to immediately and substantially reduce greenhouse gas emissions. Without targeted reductions, the ongoing damage to coral reefs from global warming will soon be irreversible.
Ocean acidification due to increased atmospheric CO2 is accelerating, and will detrimentally effect the growth and skeletal strength of calcifying species, such as corals. Reducing CO2 emissions is the only way to prevent further damage to coral reefs. Loss of coral also impacts on many other species and reduces reef fisheries.
Coral reefs are economically, socially and culturally important, and therefore need to be sustained. For example, the Great Barrier Reef contributes $6.9 billion annually to the Australian economy - $6 billion from the tourism industry, $544 million from recreational activity and $251 million from commercial fishing. This economic activity generates more than 65 000 jobs.
Climate change, overfishing and pollution continue to cause massive and accelerating declines in abundance of coral reef species and global changes in reef ecosystems. Even remote and well-managed reefs are under threat from climate change.
Coral bleaching has greatly increased in frequency and magnitude over the past 30 years due to global warming. For coral reefs, climate change is not some potential future threat – it has already caused enormous damage that will increase in coming years. Bleaching due to climate change has already caused widespread damage to the Great Barrier Reef in 1998 and 2002.
The world has a narrow window of opportunity to save coral reefs from the destruction of extreme climate change. Substantial global reductions of greenhouse gasses must be initiated immediately, not in 10, 20 or 50 years.
No-fishing reserves (green zones) are an important management tool for preserving targeted stocks of coral reefs, and the ecological functions they provide. To be effective, 25-35% of marine habitats should be no-take (no fishing) for long-term protection. In Australia, many coral reefs have yet to achieve this level of protection (especially in the Northern Territory, Western Australia, south-east Queensland, and the Coral Sea).
Coral reef megafauna (e.g. dugongs, turtles and sharks) continue to decline rapidly, and are ecologically extinct on most of the world’s reefs. In Australia, current management practices are failing to maintain populations of megafauna, which are already severely depleted. Commercial harvesting and marketing of these species should be banned to allow the recovery of depleted stocks.
Local action can help to re-build the resilience of reefs, and promote their recovery. It is critically important to prevent the replacement of corals by algal blooms, by reducing runoff from land and by protecting stocks of herbivorous fishes. However, reefs cannot be “climate-proofed” except via reduced emissions of greenhouse gasses.
Terry Hughes | EurekAlert!
Preservation of floodplains is flood protection
27.09.2017 | Technische Universität München
Conservationists are sounding the alarm: parrots much more threatened than assumed
15.09.2017 | Justus-Liebig-Universität Gießen
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
17.10.2017 | Event News
10.10.2017 | Event News
10.10.2017 | Event News
19.10.2017 | Materials Sciences
19.10.2017 | Materials Sciences
19.10.2017 | Physics and Astronomy