Articles tagged with Coral Reefs
Coral reefs face severe threats from human activities, and current MPAs are often insufficient to protect biodiversity. A global network of MPAs with optimal size and isolation is necessary to conserve coral reefs.
A new study reveals that coral reefs in Aceh, Indonesia, can survive devastating events like tsunamis, economic crises, and civil wars if effectively managed. Managed reefs showed significantly higher coral cover than open-access areas.
Researchers urge governments to implement stricter controls on the live reef fish trade, a growing threat to coral reefs. The trade has devastating effects on the ecosystem, including the depletion of coral reef stocks and the spread of destructive harvesting methods.
A global survey of coral reefs, built using NASA satellite images, found that only a handful of marine protected areas provide effective protection for fish species and marine life. The study highlights the need for larger reserves to protect these ecosystems.
A UCF study found that coral tissue damage cannot heal near pollution sources on land, leading to reef decline and increased hurricane risks. The loss of coral harms natural ecosystems and the tourism economy, while also protecting coastal areas from storms.
A Johns Hopkins University researcher found that corals can switch from using aragonite to calcite minerals in building their skeletons based on the magnesium-to-calcium ratio of seawater. This change poses questions about coral reefs' future survival amid global warming and ocean acidification.
A new report warns that carbon dioxide emissions are dramatically altering ocean chemistry, threatening marine organisms such as corals and pteropods. The report highlights the potential impacts on marine food webs, biodiversity, and ecosystems, emphasizing the need for further research to understand these changes.
The world's coral reefs are left vulnerable by insufficiently managed marine protected areas (MPAs), according to a new global analysis. The study found that many MPAs are too small and far apart, leaving them susceptible to poaching and external human threats such as pollution and overfishing.
The study found that 40% of marine protected areas are smaller than 1-2km2, an insufficient size to protect large fish and other animals. To effectively conserve coral reefs, each Marine Protected Area should be at least 10-20 km in diameter.
A global assessment of coral reef protection reveals that marine protected areas (MPAs) are often poorly managed and fail to effectively safeguard these critical ecosystems. The study found that many MPAs lack enforcement mechanisms, leading to threats such as resource extraction, poaching, pollution, coastal development, and overfishing.
Scientists have discovered a link between bacterial growth fueled by algae and the death of corals. The study shows that bacteria suffocate corals by cutting off oxygen supply, leading to a positive feedback loop that accelerates reef decline. Human activities such as overfishing, pollution, and climate change exacerbate this process.
A recent study found that coral reefs in the Seychelles have suffered severe damage from global warming, leading to a 90% decline in coral cover and a significant loss of biodiversity. The damaged reefs are unable to reseed and recover, resulting in profound impacts on other organisms in the ecosystem.
A new study found that branching coral Montipora capitata sharpens its plankton intake when bleached, increasing its chances of recovery. The findings indicate that any coral, regardless of shape or location, can recover if it can increase feeding.
Researchers discovered that some coral species can replenish energy reserves by increasing feeding rates, allowing them to recover from bleaching events. However, even resilient species face a significant threat as global warming projections suggest up to 60% of the world's coral reefs could be lost within 10-30 years.
A group of high school students will participate in a groundbreaking coral reef research expedition to the Red Sea, assessing threats such as climate change, ecotourism, and pollution. The team's findings will guide international policy on coral reef management and have significant economic and social implications for the world's oceans.
The Khaled bin Sultan Living Oceans Foundation is conducting a pioneering study on the Farasan Islands Marine Protected Area off the coast of Saudi Arabia. The research will assess the effects of ecotourism, pollution, over-fishing, climate change, dredging, and development on coral reefs.
Cold-water corals are vulnerable to ocean acidification, which can harm their ability to build skeletons. By 2100, only 30% of cold-water reefs may still be in waters supersaturated with aragonite, a form of calcium carbonate.
Scientists have retrieved high-resolution climate records from coral cores off the Tahiti coast, spanning 20,000 years and providing insights into sea level change and El Niño anomalies. The longest continuous coral core is 3.5 meters long, representing 350 years of growth, and contains valuable information on climate variability and p...
The Bahamas Biocomplexity Project adopts a holistic approach to marine conservation, combining scientific tools with ethnographic and economic surveys. The project's findings suggest that marine protected areas can increase seaweed grazing and reduce algal abundance, benefiting coral reefs.
Research by Kline at the Smithsonian Tropical Research Institute found that high levels of sugar in seawater can kill corals by encouraging bacterial growth. This discovery underscores the need to consider the impact of carbon compounds on coral reefs when developing conservation efforts.
Marine scientists are investigating the world's coral reefs to assess biodiversity, identify species, and predict reef collapse. The CReefs project aims to answer key questions about reef dynamics, species survival, and conservation strategies.
A study in Science journal reveals that marine reserves can support the growth of parrotfish populations, maintaining reef ecosystems. The Nassau Grouper's impact on the reef is minimal due to the size limit for predation, enabling healthy coral reef recovery.
Researchers found that direct tsunami damage was mainly restricted to unconsolidated coral substrates, while chronic human misuse had a greater impact on reefs. Healthy reefs did not reduce tsunami-induced land damage, contrary to previous assumptions.
A two-week survey of over 600 kilometers of Aceh's southwest coast will examine the damage to coral reefs caused by the December 2004 earthquake and tsunami. The survey aims to understand the extent of the damage and provide insight into the natural recovery process.
Researchers discovered that sponges are the most important inhabitants of underwater caves on coral reefs, filling over 60% of cavities. They filter massive quantities of planktonic particles, facilitating growth and conversion of organic to inorganic nutrients.
Researchers discover crystal structure of cyan fluorescent protein, leading to understanding of coral reef coloration. The study provides insight into the biological function of coral reef coloration and its potential connection to environmental stresses.
A team of scientists found that coral populations were healthy until the 1980s when they were killed by disease and high sea temperatures. Addressing global environmental issues like climate change is crucial for saving coral reefs.
Research found that coral and rock reefs offshore played a key role in shaping the severity of tsunami inundation. Healthy coral reefs in the Maldives islands may have contributed to their narrow escape from destruction.
Researchers tracked coral reef fish larvae using DNA paternity analysis and marking with tetracycline, finding that one third settled within a two-hectare area near their birth site. This study documents the smallest scale of dispersal for a marine fish species, providing insights into sustainable marine reserve management.
In a unique project, scientists collaborated with Fijian villagers to explore, protect, and generate income from their coral reef. The project involves planting synthetic rock that becomes naturally covered by desirable species, providing villagers with financial benefits.
Researchers discovered a new species of coral-reef pygmy goby that lives for just 59 days, with daily mortality rates as high as 8%. The tiny fish lays only three clutches of eggs in its lifetime, contributing to the complex and hectic life cycle of reef fish.
Researchers found genetically similar fish in ecologically similar habitats across vast distances, contradicting the idea that geographical barriers drive speciation. This discovery supports ecological speciation and suggests a new approach to understanding biodiversity evolution on land and sea.
Coral reef ecosystems in Hawaii and Florida are facing ecological degradation due to pollution, overfishing, disease, and climate change. Researchers recommend managing coral reefs as whole ecosystems, reducing terrestrial runoff and investing in infrastructure to prevent further decline.
The Pew Institute for Ocean Science has selected 89 international Pew Fellows from over 20 countries who have completed conservation projects across the globe. The fellowships aim to protect ocean environments through education, collaboration, and research.
Blast fishing remains a widespread issue despite Indonesia's ban in 1985. To combat this, programs that decrease destructive fishing practices are critical for ecosystem restoration and economic value., Gentle, low-cost care can help restore coral reefs.
A new study contradicts previous predictions that coral reefs will suffer large declines by 2100 due to ocean warming. Instead, the research finds that coral reef calcification rates may increase by up to 35% by 2100, potentially exceeding pre-industrial levels.
A new analysis by Princeton University and Brown University scientists found that delaying action on reducing greenhouse gas emissions can result in dramatic environmental consequences. Even reaching the same target level of greenhouse gases, plans would have vastly different effects on ecosystems.
Marine scientists aim to fill information gaps on coral reef ecosystems to strengthen global management and policy interventions. The assessment focuses on identifying sources of new marine pathogens, reducing inputs, and developing control measures.
A new internet-based library for coral reefs has been created by NASA, providing a comprehensive world data resource on coral reefs and adjacent land areas. The library will help improve local assessments of reef resources around the world and provide access to reliable global satellite datasets for mapping coral reefs.
Research identifies seven ecological ratchets that contribute to coral reef loss, including decreased reproductive success and disproportionate predator survival. Organizations should focus on preventing degradation rather than restoration, with local management of resources being a key strategy.
Macroalgae, particularly Halimeda opuntia, triggers a virulent white plague type II disease in corals. The alga is also found to be a reservoir for the causative agent Aurantimonas coralicida.
A new project led by Newcastle University aims to examine the ecosystem consequences of bleaching on coral reefs. The research team will analyze changes in reef fish assemblages over five to 15 year time scales at sites in the Western Indian Ocean and Australia.
A new study found that subsistence fishing has disastrous consequences for coral reefs, causing healthy corals to die and being rapidly replaced by algae. Even low levels of fishing can bring about profound ecosystem changes, including the growth of crown-of-thorns starfish populations.
Commercial fishing methods are causing significant damage to Fijian coral reefs. The study highlights the importance of sustainable fishing practices to protect these critical ecosystems.
A recent study using genetic data reveals that individual coral reefs within the Great Barrier Reef are vulnerable to global warming due to limited dispersal of corals. In contrast, reefs at Lord Howe Island have low genetic diversity and appear disconnected from the Great Barrier Reef.
Scientists warn that coral reefs are facing a 'crisis' due to human-caused climate change, threatening biodiversity and economic benefits. Rising CO2 levels and warmer waters cause coral bleaching and ocean acidification, devastating reef ecosystems.
Researchers are working on a method to accurately estimate coral reef health from sensors on airplanes and satellites. By analyzing light reflectance from corals, scientists can detect early signs of disease and stress, providing valuable insights into marine ecosystem health.
A study by University of North Carolina researchers suggests that chemical nutrients washed into the sea can increase the severity of coral diseases, leading to significant declines in Caribbean reef health. The findings support calls for reducing nutrient pollution from agricultural runoff, sewage and deforestation.
Field experiments on Mexican reefs show that modest nutrient pollution can increase coral mortality by facilitating disease spread. Further steps should be taken to reduce agricultural runoff, sewage pollution, and deforestation to protect coral reef health.
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.
Historical coral reef research reveals that most world reefs were degraded by overfishing and pollution even before grandparents' birth. Top carnivores and grazers are the first to disappear when humans enter the picture.
Researchers found that coral reef declines followed the same pattern globally, starting with large predators and herbivores, followed by smaller animals and finally sea grasses. The study provides a yardstick for conservation efforts, offering hope for restoring ecosystems with strong management decisions.
A recent study reveals a long-term decline of coral reef ecosystems globally, dating back to before 1900, with declines in large animals and architectural species. Overfishing is identified as the primary driver of this decline, with synergistic effects from land-derived pollution in some areas.
Scientists used an autonomous underwater vehicle to map two deepwater coral reefs, discovering well-developed reefs with nearly 100% living coral cover. The study provides new insights into the structure and composition of deeper coral reefs, which are essential for protecting commercial fisheries.
Research by West and Salm reveals that factors such as local upwellings of cold water and diverse coral populations can protect coral reefs from bleaching. Additionally, corals emerging at low tides may be more tolerant of heat stress, with examples seen in Palau's Rock Islands.
A recent study found that non-destructive fishing methods on the Banggai cardinalfish population reduced group size by half. This threat is alarming, given the species has been commercially fished for only six years and its range expands widely. To mitigate this, researchers encourage local people to raise Banggai cardinalfish in aquar...
High fish biodiversity does not guarantee ecosystem resilience in coral reefs. Human activities negatively impact bioerosion rates, even on unexploited reefs.
Researchers found that school-forming goat fish synchronize their activity patterns to increase food catch. This synchronization strategy is effective even in chaotic systems, where individual behavior can vary wildly.
The study found that coral reef fish deliberately choose mangrove forests and seagrass fields as nursery grounds, providing shelter from predatory fish and a feeding place. Without these habitats, common and economically important coral fish species will not survive.
A new study reveals that coral reef biodiversity hotspots are not driven by local endemic species, but rather by the overlap of globally dispersed species. Conservation efforts should target both high and low biodiversity regions.