Articles tagged with Coral Reefs
A new study found that coral reefs in Palau's naturally acidic waters are thriving, despite the expected negative impacts of ocean acidification. However, increased bioerosion was observed, threatening the long-term survival of these ecosystems. The research team hopes to better understand how corals adapt to low pH conditions.
Researchers found that no-take marine reserves on the Great Barrier Reef significantly reduced coral disease levels, four times lower inside reserves compared to outside. The study highlights the benefits of marine reserves for enhancing coral health and managing fishing-related damage.
A new study by the Wildlife Conservation Society presents a more complex model that incorporates multiple environmental factors and field observations to predict coral reef resilience. The model challenges traditional 'temperature threshold' predictions, suggesting a more nuanced and spatially complex future for coral reefs.
A recent PNAS study reports that the stress-tolerant alga Symbiodinium trenchii is not native to the Caribbean but was introduced from the Pacific Ocean. This finding raises concerns about the long-term damage it could cause on coral reefs, which cover only a small percentage of the world's oceans.
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.
Researchers found that coral adaptation to high salinity levels in the southern Persian/Arabian Gulf may prevent them from escaping their fate through global warming. Corals lose their exceptional heat stress tolerance when adapting to normal salinity levels.
Cold-water coral reefs, found in subarctic waters, are known for their vast biodiversity and ability to turn over carbon. Recent advances in underwater technology have enabled researchers to investigate these hidden reefs, revealing significant damage caused by deep-sea trawling and ocean warming.
Research links environmental factors to Great Barrier Reef's eight-thousand-year growth slowdown, highlighting the need for conservation efforts in the face of projected port expansions and nutrient runoff. The study suggests a two-thousand-year delay in reef growth following sea level rise and flooding of pre-existing reefs.
Climate model projections show that conditions are likely to increase the frequency and severity of coral disease outbreaks. The research team also compares their model outputs with expected future changes in the more widely publicized impact of coral bleaching.
A recent study published in Geology has shown that parrotfish play a pivotal role in providing the sands necessary to build and maintain coral reef islands. The research found that parrotfish produced over 85% of the new sand-grade sediment on reefs around island communities in the Maldives.
A new coral-dwelling gall crab, Lithoscaptus semperi, was discovered inhabiting free-living corals of the species Trachyphyllia geoffroyi on sandy bottoms near coral reefs. The study highlights the need to protect coral reefs, with the newly designated Tun Mustapha Park being a priority.
Research reveals that removing predatory fish through fishing causes significant changes to the reef's fish populations, altering the balance of the ecosystem. The study supports the continued use of marine reserves, which are effective in preserving predator numbers.
Coral reefs can recover if a minimum target of 500 kilograms of fish biomass per hectare is maintained. The study found that most degraded reefs lack key species and require time for recovery, with estimated times ranging from 35 to 59 years.
A global study found that nearly 83% of fished coral reefs have lost more than half their fish biomass, highlighting the need for effective management and conservation strategies. Marine reserves can recover fish populations in approximately 35 years, while heavily depleted reefs take around 60 years to recover.
Scientists outline a six-point plan to restore the Great Barrier Reef through better policies on science, protection, and conservation. The plan includes measures to reduce stressors such as fishing, pollution, and coastal development, as well as transitioning away from fossil fuels and limiting coal port development.
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.
A new study examines human impact on Pacific coral reefs, finding significant reductions in fish biomass at most reefs due to human presence. The analysis of nearly 40 islands and atolls reveals that even low levels of human influence can cause substantial declines in fish abundance.
Scientists have found that warming waters in the tropics are slowing the development of baby fish larvae, putting their survival at risk. This discovery raises concerns about the impact of global warming on fish populations and food security for millions of people living near the equator.
The expansion of no-take marine reserves in Australia's Great Barrier Reef Marine Park has led to an increase in fish numbers and sizes, particularly coral trout. However, researchers emphasize that no-take reserves alone are not enough to protect the reef from other threats such as pollution, sedimentation, and climate change.
A long-term study found that green zones have more than doubled coral trout biomass since the 1980s, while fished reefs experienced stable numbers and increases in large, reproductively-mature fish. Effective protection networks help reef fishes cope with stresses and maintain populations.
Researchers warn that localized issues like nutrient pollution and deforestation can exacerbate climate change impacts on ecosystems. Strengthening local management is crucial to expand the 'safe operating space' for these ecosystems, which are critical to global biodiversity. Local actions can be well understood and not too expensive.
Researchers warn that localised issues such as water pollution and deforestation can exacerbate the effects of climatic extremes, reducing an ecosystem's capacity to cope with climate change. The authors call for enhanced local action to protect globally important ecosystems like the Great Barrier Reef and Amazon rainforest.
A study published in Current Biology reveals that the dusky dottyback, a small predatory fish found on coral reefs, changes its color to mimic other fish species to hunt juvenile offspring. This clever strategy also helps the fish avoid detection by predators.
Researchers found La Niña-like conditions associated with a 2,500-year hiatus in coral reef growth. The study suggests that similar climate changes could lead to coral reef collapse. Climate change is the leading cause of coral-reef degradation.
Researchers at James Cook University have discovered that Great Barrier Reef corals will consume microplastic pollution. The study found that the corals eat plastic particles at rates only slightly lower than their normal rate of feeding on marine plankton.
Researchers found that symbiotic algae Symbiodinium D is more common in Caribbean corals than previously thought, suggesting potential for coral resilience. This discovery could inform future analysis of the Great Barrier Reef's response to climate change.
Researchers have found that corals use multiple identical copies of a gene to control pigment production, leading to dramatic differences in color among individuals. This genetic strategy helps corals survive in stressful environments and extends their distribution range along light gradients of coral reefs.
Researchers have discovered two new species of Palythoa anemones living in cracks and caves of coral reefs, lacking zooxanthellae. The species exhibit unique morphological features adapted to their dark habitats, providing insights into parallel evolution.
A new study projects that the Great Barrier Reef could lose more than half of its coral cover if ocean temperatures continue to rise. The research suggests that moderate warming would lead to a high probability of coral cover declining to less than 10 percent, threatening reef growth.
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.
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.
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.
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.
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.
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.
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.
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.
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 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.
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.
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.