Articles tagged with Coral Bleaching
A massive ocean heatwave is approaching the Hawaiian Islands, threatening unique life on Earth. ASU is providing real-time monitoring of coral reef health through its Global Airborne Observatory and Planet satellite program to help minimize additional stress on corals.
Researchers found that severe marine heatwaves lead to immediate coral mortality and rapid decay, not just bleaching. This phenomenon is distinct from coral bleaching and will likely become more frequent as temperatures rise.
Researchers developed an algorithm using over 30 years of satellite data to isolate extreme warming events leading to documented coral bleaching in the Red Sea. The findings suggest that coral bleaching may have been greatly underestimated and indicate a emerging pattern of extreme warming events in the northern region.
A new study published in Nature Climate Change reveals that corals that survived 2016 bleaching were more resistant to heat stress in 2017. The research highlights the extent of damage caused by multiple coral bleaching events on the Great Barrier Reef, with only 7% of reefs escaping bleaching entirely since 1998.
A new study published in Nature Ecology and Evolution found that reef fisheries can still provide stable catches despite extreme coral bleaching. However, the fishery's success is more patchy and dependent on fewer species, with algal-feeding fish like rabbitfish providing a temporary boost.
Researchers found that coral bleaching causes a decrease in aggressive behavior among butterflyfish, suggesting a link between bleaching and population declines. The study suggests that fish adjust their behavior in response to environmental stressors, but these changes may not be sustainable in the long term.
A new study reveals that mass coral bleaching on the Great Barrier Reef impacted both shallow and deep reefs, highlighting the vulnerability of the ecosystem. The research found substantial bleaching effects on deep reefs, despite their depth providing some protection from thermal anomalies.
Scientists replicate a landmark study to determine changes in coral sea temperature tolerance over time. The results show corals are becoming more tolerant of warmer temperatures, but the rate of adaptation is not keeping pace with rising ocean temperatures.
A new study using genomic techniques found that algal cells in coral reefs exhibit stronger responses to ocean warming and acidification stress than their coral hosts. The research suggests an early warning system for bleaching events, which could help anticipate and prevent massive damage to coral reef habitats.
A new study reveals that reefs experiencing frequent temperature changes are better equipped to resist coral bleaching during ocean warming events. The research highlights the importance of high-frequency temperature variability in reef regions worldwide, providing valuable insights for conservation efforts and marine spatial planning.
A comprehensive review of literature on coral resilience highlights the need for urgent action to reduce greenhouse gas emissions. The study also identifies novel management techniques and overlooked reef areas to protect against climate change impacts.
Global warming is accelerating coral bleaching, threatening the future of coral reefs and millions of people reliant on them. The study documents a dramatic shortening of the gap between pairs of bleaching events, now occurring every six years on average.
A recent study found that global coral bleaching events have increased in frequency and severity over the past four decades. Severe bleaching episodes are now more common than ever, affecting over 30% of cases, with the risk of such events rising by approximately 4% annually since 1980.
Researchers have made a breakthrough in genetically engineering microalgae found in corals to enhance their stress tolerance and prevent coral bleaching. This could be a game-changer for ocean productivity and global coral reef conservation.
A new global coral bleaching database has been developed to predict future bleaching events and assess changes in mass bleaching frequency. The database contains 79% more reports than the existing voluntary database, with two-thirds showing moderate or severe bleaching.
Coral bleaching reappears on the Great Barrier Reef for the second year in a row, with scientists conducting aerial and underwater surveys to measure damage. The study reveals that past exposure to bleaching does not make corals more tolerant, and global warming is the primary threat to the Reef's resilience.
Researchers discovered that corals activate ancient genes when exposed to stressful conditions, which could serve as an early warning sign for coral bleaching events. This study provides a new way to monitor coral health and predict bleaching events, potentially helping scientists identify and map survivor coral colonies worldwide.
New research reveals that mass coral die-offs in the Maldives and other Indian Ocean reefs have caused widespread bleaching and erosion, leading to a rapid decline in reef growth rates. The study found that reefs are now eroding at a faster rate than they are growing, with severe consequences for biodiversity and ecosystem services.
Coral reefs face severe bleaching every year on 99% of the world's reefs within this century if current trends continue. However, more ambitious emissions reductions may extend their survival by an average of 11 years.
Researchers from Woods Hole Oceanographic Institution found that superoxide produced at coral surfaces may help corals resist bleaching. Contrary to previous findings, corals producing high concentrations of superoxide had greater resilience to bleaching than those with low production levels.
Researchers from Queensland University of Technology have captured the first videos of a coral's bleaching behavior, showing how it employs pulsed inflation to expel Symbiodinium algae. The study suggests that this rapid expulsion may increase the coral's chance of survival during abnormally high sea temperatures.
New research reveals that singlet oxygen plays a crucial role in triggering coral bleaching by expelling algae from coral tissue. The findings may help protect reefs and support marine species dependent on them.
The Great Barrier Reef has suffered severe damage from coral bleaching, with 93% of the reef's corals affected. Severely bleached corals have lost nearly all their zooxanthellae, making recovery highly unlikely.
Researchers identified genes allowing some algae to tolerate high ocean temperatures, which could help predict coral bleaching risk. The study found that warmer reef algae can activate heat-tolerant genes to counter damaging effects of reactive oxygen species.
Researchers discovered that some corals can acquire new types of algae from their environment, making them more heat-tolerant and enhancing recovery. This phenomenon, known as 'symbiont switching,' was previously thought to occur only in juvenile corals or during bleaching events.
A new study found that Great Barrier Reef corals survived past bleaching events by being exposed to a gradual warming pattern. However, this protective mechanism is likely to be lost under near future climate change scenarios. The researchers recommend prioritizing conservation efforts for reefs with retained thermal protection.
A global index detailing vulnerable corals and their susceptibility to thermal stress is now available. The index, based on nearly half a century of historical data, will help conservationists and scientists understand the effects of climate change on coral reefs.
A study found that viral infections, including a herpes-like virus, contributed to coral bleaching events, particularly under high temperatures and environmental stresses. The research suggests that viruses may play an important role in coral disease, especially when combined with other stressors.
Researchers have discovered that the shape of a fish's tail is a key predictor of its ability to live across different depths on coral reefs. Fish with more forked tails are better adapted to survive in both shallow and deep habitats, thanks to their stealth swimming capabilities.
A new study suggests that geoengineering techniques, such as Solar Radiation Management, can reduce the risk of global severe bleaching and degradation of coral reefs. The research found that even under ambitious CO2 reduction scenarios, widespread coral bleaching will occur by the middle of this century.
The new research provides fine-scale projections of coral bleaching, showing great variety in the timing and location of these effects. Coral reefs projected to experience bleaching conditions later can be conservation priorities.
Coral reefs support 25% to 35% of ocean fish, providing protein for millions. Ecologist study reveals how corals respond to high water temperatures by expelling heat-sensitive algae, which can have long-term consequences.
A new study suggests that coral reefs can adapt to moderate climate warming if there are significant reductions in carbon dioxide emissions. The research found that corals have already adapted to part of the warming that has occurred over the past 40 to 60 years, and could potentially reduce bleaching by 20-80% through genetic adaptation.
Scientists at Hebrew University and Bar-Ilan University found that Eilat's corals are more resilient than other sites due to a 'warm-water barrier' in the Red Sea. This barrier allows only heat-tolerant genotypes of corals to enter, making it a unique refuge for coral reefs.
Researchers propose targeted cloud brightening as a means to lower sea temperatures and reduce coral bleaching. The technique, which involves seeding marine clouds with tiny seawater droplets, could provide a 50-year reprieve for coral reefs threatened by acidification and warming.
A team of Australian scientists has made a groundbreaking discovery about the mechanism behind coral bleaching, a devastating event caused by rising water temperatures. Corals are able to respond to stress by killing off some cells while strengthening others in an attempt to recover after the hot water has moved on.
Researchers have identified three chemicals – betaine, glutamate, and succinate – produced by a bacterium that cause coral bleaching. These substances are involved in the transformation of harmless marine bacteria into killers that choke off corals' energy supply.
Researchers studied Vibrio coralliilyticus's metabolic activity using NMR, finding temperature-dependent changes that contribute to coral bleaching. The team aims to better understand the symbiotic relationships between coral and its zooxanthellae algae.
Mass coral bleaching events are devastating coral colonies worldwide, and researchers have found that bleaching can increase the susceptibility of corals to disease. The study reveals a link between bleaching and disease prevalence, suggesting a more complex cause of coral decline than previously thought.
A Scripps-led study reveals that improving ocean health can accelerate coral reef recovery after bleaching events. Corals from reefs with clean water and abundant sea life bounced back to normal growth rates within two to three years.
Coral reefs in Australia's Great Barrier Reef Marine Park have recovered rapidly from a devastating bleaching event in 2006, thanks to an exceptional combination of ecological mechanisms. Asexual reproduction played a vital role in the recovery process.
A new NOAA coral bleaching prediction system suggests some bleaching in the Caribbean later this year, but not severe. The Northwestern Hawaiian Islands are at a higher risk of widespread bleaching in August.
A new study finds evidence of an ocean 'thermostat' regulating sea-surface temperatures in the Western Pacific Warm Pool, protecting coral reefs from severe warming. This discovery lends support to a long-debated theory that naturally warm waters may be more resistant to climate change.
A researcher at Florida Institute of Technology has received a $62,000 World Wildlife Fund grant to investigate the relationships between water quality and coral resilience in South Florida's reef ecosystems. The goal is to develop a tool that can inform decision-making and enhance adaptive management options.
Researchers will develop mathematical models to better understand coral bleaching and predict future changes. Localized warming of the world's oceans is causing thermal stress on coral reefs, leading to mass bleaching and ecosystem decline.
Coral reefs are experiencing extensive bleaching due to gradual warming of ocean temperatures. A new study found that heat damage to symbiotic algae is degrading their ability to convert light into utilizable energy. The damaged algae, including the D1 protein, impair photosynthesis and lead to coral expulsion.