A recent study reveals that coral-eating fish excrete symbiotic dinoflagellate algae by the millions, potentially keeping reefs healthy. This unexpected twist on coral reef symbiosis confirms that poop from coral-eating fish is an important environmental source of beneficial coral symbionts.
Researchers found that algae colonizing dead coral can lead to false impressions of a healthy reef ecosystem. This challenges traditional methods for assessing coral health, which rely on measuring calcium carbonate production, as it may not accurately account for the impact of algal overgrowth.
Researchers at Florida State University found that certain coral species vary in their response to thermal stress, with some surviving and others dying. This diversity helps maintain coral reef resilience, much like a diverse financial portfolio.
The study reveals that despite local coral loss, global extinction risk is lower for most species due to broad geographic ranges and huge population sizes. The researchers estimate that only a few dozen of the 80 considered species are threatened with extinction.
The Khaled bin Sultan Living Oceans Foundation's Global Reef Expedition found the Chagos Archipelago to be home to some of the most diverse coral reefs in the Indian Ocean. Despite being relatively undisturbed, human impacts were evident, and mass bleaching caused widespread coral mortality.
A University of Hawaii study found that Oahu's marine protected areas do not adequately protect populations of herbivorous fish species that eat algae on coral reefs. The research suggests that environmental characteristics like habitat complexity and depth have a greater impact on these fish populations than MPA protection.
A new study reveals a unique link between the diet and distribution of coral reef fishes, highlighting planktivores as potentially vulnerable to environmental change. The Indo-Australian Archipelago is a global marine biodiversity hotspot, where planktivorous fish species are more diverse than others.
Researchers found significant distribution disparities in coral reef fish species across trophic groups, with a disproportionate number of planktivores in the IAA. Planktivore species richness was highest near Indonesia and the Solomon Islands, but declined sharply outside the region.
Recent studies suggest organic UV filters in sunscreens may harm coral reefs, but evidence is limited and inconclusive. Researchers recommend further field and lab studies to assess environmental risk and develop a coral environment risk assessment framework.
A recent study reveals Florida's delayed response to a coral disease epidemic resulted in massive coral deaths, with key findings highlighting the importance of early intervention and effective management strategies.
Researchers have made a groundbreaking discovery about coral bleaching, revealing that corals start to starve before their algae are expelled due to nutrient depletion. This finding has significant implications for understanding the causes of coral bleaching and identifying resilient reefs.
Cold-water coral reefs in the Western Mediterranean have been growing almost continuously for 400,000 years, with major climate swings controlling their development. The study reveals that intense monsoon events also had a detrimental impact on these reefs.
Researchers identified nitrogen-scrubbing bacteria living in coral slime, which can take up excess nitrogen and prevent algae blooms. This natural defense mechanism may help corals protect themselves from certain stressors.
A UCF engineering and biology team tested how well staghorn coral skeletons withstand natural forces and human impacts, discovering a unique safety feature: pores that relieve stress and prevent catastrophic failure. The findings will inform efforts to transplant nursery-reared coral into the wild and support future restoration efforts.
A Rutgers-led study identifies chemical indicators of heat stress in corals, allowing scientists to pinpoint species at risk from climate change. The discovery could inform conservation efforts and protect coral reefs worldwide.
New research suggests that restoring Hong Kong's lost oyster reefs can provide significant environmental benefits, including natural water filtration and habitat for native species. The study found that just 7 square meters of a Hong Kong oyster reef can filter up to one Olympic swimming pool of water each day.
Researchers used CRISPR/Cas9 genome editing to identify a gene responsible for regulating coral's response to heat stress. The study found that corals can die of starvation without the nutrients provided by photosynthesis, highlighting the importance of conservation efforts for fragile reef ecosystems.
A new study mapped the geographic distribution of live corals across Hawaiian waters, revealing areas of degraded reef and 'refugia' where corals show resilience to human-driven environmental stressors. The detailed maps will inform conservation efforts and help protect coral reefs from critical threat levels by 2050.
Researchers developed an airborne approach to map live coral distribution in the Hawaiian Islands, revealing a negative correlation between nearshore development and live coral cover. The study suggests that this cost-effective method could provide high-resolution monitoring of coral health at a low cost.
Researchers found that most parrotfish predation scars on Caribbean coral heal within weeks, while larger scars have minimal healing. The study suggests that managing parrotfish populations may be crucial to maintaining resilient reefs.
Researchers found that introducing native herbivorous crabs to coral reefs in the Florida Keys led to rapid declines in seaweed cover and returned small corals and fishes. The crabs improve habitat conditions for corals and fishes, providing a new tool for reef restoration.
Researchers discovered that some corals can survive prolonged heatwaves and recover their food source, providing a glimmer of hope for coral reef survival. The study's findings suggest that protection from local stressors may help corals recover, offering an innovative strategy for conservationists to support coral survival.
Researchers found that coral reef ecosystems can no longer retain deposits of calcium carbonate due to ocean warming and acidification, leading to accelerated erosion. By the end of the century, coastal protection will be lost, impacting infrastructure and communities.
Research reveals an aggressive golden-brown alga is rapidly overgrowing shallow reefs in the Caribbean, taking the place of damaged coral and exacerbating ecosystem damage. The invasive algal crusts harbor a distinct microbial community that deters coral settlement.
A recent study sequenced genomes of 150 individual coral colonies to understand the evolution and survival of the Great Barrier Reef. The researchers discovered genes that rapidly evolved to endure changing conditions, including a set of genes that developed over the past 10,000 years.
A new common framework for increasing comparability of research findings on coral bleaching has been developed by an international consortium of scientists. The framework covers key variables such as temperature, water flow, and light, allowing researchers to anchor their studies and compare results more easily.
The new report projects that all world's coral reefs will experience severe bleaching annually by 2034 under the most aggressive scenarios. Coral reefs in some countries, such as Indonesia and Malaysia, are projected to have temporary refugia, but many will face significant exposure to annual severe bleaching conditions.
Researchers used genetic analysis and satellite data to identify coral populations better equipped to withstand rising temperatures. The study found correlations between prolonged exposure to high heat stress and climate-adaptive traits, supporting hypotheses of connectivity and adaptation.
Researchers from Arizona State University used satellite and field studies to identify key factors affecting coral outplant survival. They found that low POC levels, stable PAR, minimal temperature anomalies, and increased water depth are crucial for maximizing restoration success.
A new study has identified the coral skeleton growth mechanism, revealing that controlling water temperature is crucial for restoring reefs. The research suggests that corals regulate their internal ion concentrations by pumping calcium and carbonate ions from seawater through coral tissue.
A recent study on the Great Barrier Reef reveals that crown-of-thorns starfish can navigate back to their shelters at dawn after feeding on corals at night. The research found that only starfish with a well-stocked larder, meaning they have an ample supply of coral prey, were able to find their way home.
Coralline red algae have formed a calcareous skeleton to support coral reefs for at least 150 million years. However, their role was only proven through the analysis of over 700 fossilised reefs from the Earth's history.
A new study finds that Hawaiian corals' diversity is driven by co-evolution between the coral host, algal symbiont, and microbial community. The team analyzed metagenomic sequencing data to understand adaptation and variation in corals.
Researchers at Arizona State University have generated a global coral reef extent map using advanced AI, predicting the location of shallow reefs with nearly 90% accuracy. The map was created by analyzing thousands of satellite images and is now available through the Allen Coral Atlas.
Researchers found that corals with high levels of parasitic bacteria are more susceptible to disease, even when appearing healthy. This discovery provides crucial insights into coral restoration efforts in the Caribbean.
Scientists from the Khaled bin Sultan Living Oceans Foundation found Palau's coral reefs to have exceptionally high live coral cover, exceeding 45%, and species diversity. However, reef fish communities were found to be lacking, with many big fish missing and signs of overfishing observed on nearshore reefs.
A study published by FSU researchers found that coral reef mats are composed of diverse microbial communities, including cyanobacteria, algae, fungi, and viruses. The discovery opens up new avenues for understanding the ecological role of these mats and how to protect reef ecosystems.
Researchers at Oregon State University found that viral infection is involved in coral bleaching, with bleached corals having a higher abundance of eukaryotic viruses and giant viruses. These findings suggest that viral assemblages shift between coral bleaching states.
Coral Gardens Reef in Belize remains home to thriving Acropora spp. coral, providing an exception to the species' decline across the North Atlantic/Caribbean region. The reef has been consistently habitable since at least the 1980s and up to November 2019.
A study suggests that deep-sea coral reefs are at risk of collapse due to increasing ocean acidity caused by rising levels of carbon dioxide. The underlying structures of the reefs become brittle and fragile, leading to early breakage and crumbling, ultimately shrinking the ecosystems.
Researchers have developed a new genetic tool to classify corals, challenging over 200 years of traditional classification. The study reveals new insights into coral evolution and identification, providing crucial knowledge for conservation efforts and proposal assessment.
A study published in Coral Reefs finds that materials in seawater affect light availability and wavelength on coral reefs, impacting photosynthesis and ecological zonation. Researchers used an instrument called a profiling reflectance radiometer to collect data profiles across Hawaiian and Bermudian reefs.
Researchers from the University of Queensland have found that 'dead' coral rubble supports more animals than live coral, revealing a new understanding of these often-overlooked habitats. The discovery highlights the importance of biodiversity in these areas, which are dominated by tiny invertebrates and microorganisms.
Researchers find significant decline in coral skeleton density due to ocean acidification on the Great Barrier Reef and South China Sea. This effect will likely accelerate as ocean acidity increases over the next several decades.
Effective solutions to climate change threaten coral reefs require prioritization challenges, weighing quality versus quantity, and species selection. Coordinated interventions combined with best-practice management are necessary to sustain the reef's resilience.
A newly developed genotyping chip can help establish and maintain genetic diversity in reef restoration efforts. The chip allows researchers to genetically identify corals and their symbiotic algae, enabling conservation biologists to track coral diversity and compare samples.
A UBC Okanagan researcher has developed an agent-based model to simulate the behavior of coral reefs and identify traits that contribute to their resilience. This will help design reef management and restoration strategies to stem losses and ensure the long-term health of coral ecosystems.
Researchers have discovered that nutrients exacerbate the negative impacts of climate change on corals, increasing the risk of mass coral bleaching. High levels of nutrients stress corals, making them more susceptible to heat-induced bleaching.
A Rutgers-led team discovered that coral sperm and eggs share similar gene functions during the planktonic stage, suggesting a crucial link to their reproductive success. The research, published in PeerJ, highlights the importance of understanding coral gametes' vulnerabilities to climate change.
A global research study has identified successful coral reef restoration projects that combined local community engagement, tourism support, and trained local fishermen or divers. These collaborative efforts resulted in high coral survival rates, increased coral cover, and socioeconomic benefits for surrounding communities.
Researchers found that small fish on hot Arabian Gulf reefs are less diverse and abundant than those on cooler reefs, despite similar coral cover. The thermal extremes may be an energetically challenging environment for these smallest marine vertebrates.
Researchers found that coral reefs in the ETP region have adapted to heat stress, with some recovering within 10-15 years after El Niño events. The study suggests that ETP corals' high reproductive rates, tolerant symbiotic algae, and geographical patterns may contribute to their resilience.
A global study found sharks are functionally extinct on nearly one in five of the world's reefs. The survey, published in Nature, covered 371 reefs across 58 countries and revealed that sharks were rarely seen on close to 20% of those reefs.
Researchers used high-quality coral genomes to study variable responses to climate change and identify genetic variants associated with bleaching. They found a polygenic risk score could predict bleaching potential in the wild, while also revealing genetic diversity in heat stress response genes.
A new study from Columbia University provides a blueprint for using genomics to help combat climate change by identifying corals that can adapt to warmer seas. Researchers analyzed genetic data from 237 samples collected at 12 locations along the Great Barrier Reef, finding multiple genetic variants associated with bleaching tolerance.
Researchers from Arizona State University found that coral outplant survival drops below 50% if sea surface temperatures exceed 30.5 degrees Celsius, highlighting the importance of considering temperature conditions in reef restoration efforts.
Researchers from OIST Graduate University discovered the crown-of-thorns starfish's evolution, shedding light on its population changes and potential threats to coral reefs. The findings suggest complex ocean currents in the Ryukyu Archipelago may aid the survival of the larvae.
Researchers have developed a rapid stress test to assess coral thermotolerance, allowing for the identification of resilient corals that can survive ocean warming. The 'Coral Bleaching Automated Stress System' (CBASS) enables on-site testing within 18 hours, compared to months in a laboratory.
A custom light-sheet microscope enables gentle observation of corals and their polyps for eight hours at high resolution. This technology sheds light on coral bleaching and symbiotic relationships.
A new study reveals that two key species of Australian aquarium corals are particularly susceptible to bleaching due to recurrent heatwaves. The study's findings emphasize the need for targeted in-situ monitoring to ensure the long-term sustainability of the coral industry.