Articles tagged with Coral Reefs
A new study reveals that a small variation in sea level can stall coral reef growth and sediment production, contradicting the long-held notion of continuous reef formation. The research found that most lagoon infilling occurred over just four thousand years before being 'turned off' by a relatively small sea level fall.
Researchers found that water depth and reef structure can predict coral reef recovery with 98% confidence. The study used nearly 20 years of coral reef data from the Seychelles to identify thresholds for these factors. This prediction can help reef management plan strategies to improve the outlook for reefs.
Researchers found that cooler temperatures and presence of symbiotic algae influence coral larvae's choice of settlement location. The study suggests a link between crustose coralline algae and symbionts, which may change how corals select their life-long position on the reef.
A study published in Geology highlights the dangers of coral reefs facing erosion due to ocean acidification and nutrient pollution. The researchers found that bioeroders can thrive in waters with high nutrient levels and low pH conditions, tipping the balance towards erosion.
Corals expel damaged symbiotic zooxanthellae under moderate thermal stress to avoid accumulation and maintain stable carbon concentration. However, prolonged exposure can lead to increased expulsion of photosynthetically damaged cells, which may not be enough to prevent coral deterioration.
A new study highlights the importance of inclusive reef management policies to address unequal access to reef benefits. Coral reefs provide essential resources such as food and income opportunities, but not everyone has equal access to them.
New research reveals that baby corals can acclimate to increased atmospheric carbon dioxide levels, potentially mitigating the impact of ocean acidification. This finding suggests that staghorn corals, traditionally considered stress-tolerant, may have a limited ability to adapt.
Three studies published in Philosophical Transactions of the Royal Society Biological Science hold promise for resource managers to predict and avoid ecosystem collapse. Successful management depends on consistent monitoring, incorporation of tipping points data into actions, and local-scale management.
A new study using CT scans reveals that ocean acidification enhances reef breakdown, putting coral reefs at risk. The research found that pH levels were the strongest predictor of accretion-erosion balance, with reefs shifting towards higher erosion rates in more acidic water.
Leading coral reef scientists argue that a shift away from extinction threat is needed to protect marine ecosystems. Researchers found no relationship between species abundance and geographic range, highlighting the weaknesses in current approaches to assessing extinction risk.
Researchers have developed a new method to predict illegal fishing patterns in offshore marine reserves, enabling authorities to better protect these areas. The study, which analyzed data from the Cocos Island National Park, identified hotspots and lunar phases associated with illegal fishing, allowing for more targeted patrols.
A new study by WCS found that implementing stricter fisheries management overcame the expected detrimental effects of climate change disturbances in coral reef fisheries. Rapid implementation of fisheries restrictions countered adverse climate effects and increased fisheries catches.
Hurricane Gonzalo stirred up ocean sediment off Bermuda's coast, as captured by NASA's Aqua and Terra satellites. The satellite imagery revealed sediment streaming east and south of the island.
New research highlights the crucial role of bioerosion and carbonate production on Caribbean coral reefs. Species that live in and erode coral reefs, such as sea urchins and parrotfish, will significantly impact the future health of reefs. The study suggests a delicate balance between these processes is necessary to maintain reef health.
A study published in PLOS ONE suggests that coral reefs will have winners and losers among species facing increasing stressors. Fast-growing, small, and stress-resistant corals are likely to thrive in a warmer future.
Research reveals that diverse guard-crab species and size classes offer different kinds of effective protection against coral predators. The study found that even small crabs defend against snails, while larger crabs ignore them.
A recent study found that ocean acidification caused a significant decrease in calcification rates of the Great Barrier Reef, threatening its ecosystem. The research suggests that coral reefs are now producing less dense and fragile skeletons, making them more susceptible to erosion.
The Great Barrier Reef is an effective wave absorber, driving currents that transport nutrients and larvae. Wave reduction also has implications for shoreline stability. The reef's porosity varies by location, influencing wave height reduction.
Researchers found that coral growth rates in Australia's Great Barrier Reef have declined by 40% since the mid-1970s. Ocean acidification is suspected to be a major contributor to this decline, as increased CO2 levels in the atmosphere damage coral reefs.
Research found clownfish larvae disperse across 400km ocean to find new homes, adapting to environmental changes. The study tracked fish migrations between two Omani coral reef populations, revealing their connectivity.
Research shows that baby clownfish can travel hundreds of kilometers across the open ocean to connect distant populations, with six percent of sampled fish migrating over 400 km. The study uses DNA fingerprinting and oceanographic modeling to understand the migration patterns and their relevance for managing coral reef ecosystems.
A recent study found that many reef fish species carry out unique and essential roles, making ecosystem vulnerability to loss of those species high. The researchers argue that protecting these specialist species is crucial to maintaining ecosystem health.
A study published in PLOS ONE found that sharks thrive in healthy coral reefs with no fishing zones. The research revealed a significant increase in shark abundance in non-fished areas of the Great Barrier Reef, emphasizing the importance of preserving coral health for shark conservation.
An international team of scientists has described a new hard coral species, Pachyseris inattesa, from the Saudi Arabian Red Sea. The study highlights the region's potential for scientific discovery and conservation efforts to preserve its natural treasures.
Researchers found more than twice as much coral disease at dredging sites compared to control sites, highlighting a direct link between dredging and coral disease. Dredging impacts corals by reducing light for photosynthesis and interfering with feeding, leading to chronic stress and increased disease prevalence.
Researchers analyzed bioerosion rates and distribution of organisms on mesophotic reefs to understand long-term structural sustainability. The study found significant differences in bioerosion rates between mesophotic and shallow-water reefs.
The Great Barrier Reef's rezoning has led to the creation of green zones, protecting 30% of the reef and conserving biodiversity. The plan also minimizes impacts on fishing industries while increasing fish and shark populations in protected areas.
The Great Barrier Reef is under severe threat due to the combined effects of natural El Nino phase, anthropogenic climate change and coastal development. The reef's resilience will be significantly impacted by degraded conditions caused by dredging activity and river runoff.
A new study has overturned the long-used 'Neutral Theory of Biodiversity' by revealing its flaw: it fails to capture the crucial role of abundant species. The research, covering a vast array of marine ecosystems worldwide, found that these dominant species deliver essential ecosystem services.
A report by UC Riverside ecologists reveals the proposed 'Cabo Dorado' development project in Mexico is situated in a high-conservation-value area, mirroring the importance of tropical waters. The project threatens to make extinct regionally endemic plant species and vegetation if it proceeds as planned.
A new study reveals that coral reefs provide substantial protection against natural hazards, reducing wave energy by an average of 97%. The restoration and conservation of coral reefs is a cost-effective solution to reduce risks from coastal hazards and climate change, benefiting hundreds of millions of people worldwide.
Coral reefs are experiencing a decline in connectivity due to rising ocean temperatures, with more coral babies staying on birth reefs. This shift has both positive and negative implications for reef systems and their ability to recover from disturbances.
Stanford researchers found that some corals can adjust their internal functions to tolerate hot water faster than through evolutionary change alone. This ability may help corals survive climate change, but it's not a magic bullet and can be compromised by stressors like acidification and pollution.
Researchers found a strong correlation between shark abundance observed by citizen scientists and those identified by telemetry, suggesting that citizen science can be a cost-effective means to monitor shark populations. The study also showed that shark behavior was unaffected by tourist divers' presence.
Research confirms that fish living on coral reefs with high levels of carbon dioxide are less able to detect predator odors. The study found that these fish were also bolder and more likely to engage in risky behavior, but had fewer differences in species richness or composition.
A new research from the University of Southampton has identified a coral-eating flatworm as a potential threat to coral reefs. The researchers found that the small flatworm could cause significant damage to coral reefs due to its ability to mimic the appearance of its hosts.
The Mozambique Channel is identified as a priority for protection due to its high coral richness and sensitive species. The study found that northern reef systems in the channel are better protected from climate change and human pressures.
A recent study by NOAA scientists reveals that the Northwestern Hawaiian Islands' deep coral reefs contain nearly 50% of fish species unique to Hawaii, surpassing any other marine ecosystem. The discovery highlights the need for further conservation efforts and exploration of these largely unexplored ecosystems.
Coral reefs face declining health due to nutrient pollution. Scientists emphasize that too many nutrients can harm corals more than a lack of them. Understanding nutrient competition is crucial for developing effective management strategies.
Researchers developed robotic fish inspired by the weakly electric black ghost knifefish to study fragile coral reefs and investigate sunken ships. The technology improves underwater vehicles' agility, allowing them to navigate complex geometries in murky waters.
A recent study found that six common species of fish near the equator are unable to survive in warmer waters, with some species experiencing a narrow temperature range. This suggests that climate change poses a significant threat to these fish populations, which could have devastating consequences for human societies reliant on them.
Marine scientists in Palau found corals living in acidic waters to be diverse and healthy, contradicting previous observations. The unique environment in Palau's Rock Islands is believed to provide a 'perfect storm' of conditions that allow corals to thrive.
Researchers discovered that coral reefs in Palau's Rock Islands are surprisingly diverse and healthy despite being exposed to acidic water. The unique conditions in Palau, including a residence time of seawater that allows for continuous calcification and respiration, contribute to the corals' resilience.
A four-year study tracked the migratory patterns of 33 tiger sharks across the Coral Sea. Coastal marine parks offer limited protection to these apex predators, whereas oceanic reefs are crucial for their ecology and require prioritization in conservation efforts.
The ARC Centre of Excellence for Coral Reef Studies has been awarded $28m for research on sustainable coral reef management. The centre will focus on understanding the interaction between coral reefs and people, with a goal to foster their sustainable use.
A new study by Wildlife Conservation Society reveals that protecting Fiji's forests near the sea is crucial for preserving coral reefs. The study found that terrestrial protected areas benefit both land and coastal ecosystems, highlighting the importance of integrated planning.
The study emphasizes the need to consider human values in decision-making for long-term coral reef management. It highlights successful co-management arrangements in countries like Papua New Guinea and Kenya, where community engagement reduces conflict and increases ecological benefits.
A global assessment reveals that fishing has reduced vital seaweed-eating fish by more than 50%, compromising coral reef health. The study highlights the importance of protecting these key species to preserve ecosystem balance.
A three-year experiment found that elevated levels of nitrogen and phosphorus lead to double the prevalence of disease and tripled bleaching. However, corals recovered rapidly once pollution was stopped.
Research shows ocean warming reduces swimming ability of large reef fish, impacting hunting, mating, and reproduction. The study suggests that coral trout populations may adapt to warmer temperatures, but further research is needed.
Experts warn of substantial economic losses from ocean acidification, with declines in shellfisheries and tropical coral reefs expected. Reducing carbon dioxide emissions can slow acidification and protect some ecosystems.
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.
Researchers have discovered coral animals produce dimethylsulphoniopropionate (DMSP), a molecule that helps protect them against heat stress and influences cloud formation. This finding could be crucial for regulating local climate and mitigating the effects of rising seawater temperatures.
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 found new areas with high functional diversity in temperate waters, revealing a more nuanced map of global biodiversity. The study used data from volunteer divers to analyze species traits and distribution, painting a different picture than traditional species counts.
A decline in shark populations leads to a decrease in herbivorous fishes, promoting algae growth on coral reefs. This study highlights the critical role sharks play in maintaining reef health and underscores the need for conservation efforts to protect these apex predators.
A study suggests that shark populations are declining due to commercial fishing, leading to a decrease in herbivorous fish that promote reef health. This has fundamental effects on the structure of food chains and ecosystem resilience.
The OceanCube Observatories are designed to understand changes in species, nutrients, and energy within a controlled cube-shaped volume of water. The system provides real-time data on temperature, salinity, and other chemical, biological, and physical data critical to understanding coral reef ecosystem health.
A new study investigates why gorgonian corals, which can form a 'canopy' over reefs, appear to be proliferating in certain places. Preliminary data suggests that gorgonian coral density has been increasing on shallow reefs surrounding St. John, even as stony corals have declined.
Researchers suggest that extreme events like tropical storms and cloudy weather can trigger coral regrowth on degraded reefs. By adopting a more resilient management approach, it may be possible to restore living coral cover to these systems.