Articles tagged with Ocean Ph
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A 22-month study found that Hawaiian coral species experienced significant mortality, but some thrived under conditions simulating future ocean temperatures and acidity. The research provides hope for the future of corals, with certain species, like Porites, showing remarkable resilience.
Researchers from Texas A&M University have discovered past methane release in the Southern Ocean during a peak glaciation 23 million years ago. This finding suggests that ancient methane gas hydrates could contribute to ocean acidification and low oxygen levels, similar to recent environmental issues in the Gulf of Mexico.
Scientists discover that corals produce CaCO3 in compartments shielded from seawater, explaining differences in resilience to ocean acidification. Variations in crystallization rates among species contribute to varying levels of sensitivity.
Researchers at Bigelow Laboratory found that some coccolithophore species can use organic compounds as carbon sources, allowing them to thrive in dark conditions. This discovery has significant implications for understanding global ocean processes and the role of algae in the carbon cycle.
A new study reveals a shared molecular pathway governing sperm motility among corals, sea urchins, and humans. Researchers found that corals have a pH-sensing enzyme similar to one in human sperm, which signals when to swim.
A study published in Scientific Reports suggests that between 10.3% and 82% of the global ocean may experience new climates with higher temperatures and lower aragonite saturation by 2100. The disappearance of these climates could force marine species to adapt rapidly or disappear.
Research from UBC and HKU Earth scientists reveals that massive volcanism played a key role in triggering oceanic anoxia, with CO2-induced environmental warming creating 'dead zones' over short timescales. The findings provide important insights into the sensitivity of the Earth system to global biogeochemical cycles and marine biology.
New research reveals that increased atmospheric acidity is disrupting the ecological balance of oceans by altering nutrient transport and productivity. The study found that atmospheric acidity affects the quantity and distribution of nutrients delivered to the ocean, leading to a direct fertilizing effect on marine phytoplankton.
New research suggests that artificial ocean alkalinization can offset ten years of projected acidification in the Great Barrier Reef. The study used a high-resolution model to simulate the impact of alkalinity injection on the reef's acidity, finding that it could sequester 35,000 tons of carbon per year and alleviate the effects of oc...
A new study examines the feasibility of ocean alkalinization to simultaneously address global warming and ocean acidification. The research reveals that nearly doubling the carbon-dioxide uptake rate of the Mediterranean Sea after 30 years could mitigate climate change and counteract acidification.
A new study suggests that increasing CO2 levels in oceans may slow tropical fish's expansion into cooler, temperate waters. The research found that elevated CO2 reduced sea urchin numbers, leading to a decrease in urchin barrens and an increase in turf algal cover.
A $900,000 grant will fund a project to explore kelp aquaculture's impact on ocean acidity and carbon sequestration. The study aims to create a tool to restore ocean health and productivity. Kelp can absorb high levels of CO2, creating temporary 'halo' areas with improved water conditions for other sea life.
A new study finds that pteropods sampled off the coasts of Washington and Oregon made thinner shells than those in offshore waters. The shells' thinness is attributed to increasing ocean acidity, which interferes with the organisms' ability to build their exoskeletons.
Ocean acidification is transforming California mussel shells from aragonite to calcite, a response linked to increased acidity. This shift has significant implications for marine organisms and ecosystems, as mussels provide homes for hundreds of other species and are a rich food source.
Researchers found that sea urchins are more affected by low oxygen levels than ocean acidification when exposed to high temperatures. The study revealed that severe heat, hypoxia, and acidity do not have a synergistic effect on the urchins' performance.
A study of Maine's Swan's Island reveals declines in five species of mussels, barnacles, and snails over two decades, with young mussels experiencing the sharpest decline. The researchers attribute these changes to climate-driven ocean acidification and warming, which affect shellfish ability to thicken their shells.
A team of researchers reconstructed the key events leading to the Permian-Triassic mass extinction, which wiped out three-quarters of land species and 95% of ocean species. Volcanic eruptions released massive amounts of CO2, causing extreme warming and acidification of the ocean.
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.
The Desarc-Maresanus project uses an alkalinization process to counteract ocean acidification and remove CO2 from the atmosphere. The study found that dispersing calcium hydroxide on the surface of the sea could make it possible to halt the trend of ocean acidification, making it a promising solution to combat climate change.
A recent study by the University of Colorado Boulder and Rutgers University explores the impact of nuclear war on the world's oceans. The research finds that smoke generated by detonated warheads could shift ocean acidification patterns and rob waters of essential building blocks for organisms like corals.
Researchers used microscopic shells to reveal that California waters are acidifying twice as fast as the global ocean average, posing a threat to the state's economically valuable fisheries. The study found decade-long changes in acidity patterns, which match the Pacific Decadal Oscillation, a natural warming and cooling cycle.
A Yale University study reveals that the Cretaceous-Paleogene extinction event was triggered by a sharp drop in ocean acidity, leading to the demise of marine calcifiers and a 50% decline in species productivity. The research provides new insights into the recovery of marine life after the event.
Shrimp fed on acidic algae exhibited 63% female population, while those on normal pH had 36% females. Algal growth was correlated with CO2 levels in acidic waters, disrupting ocean's ecological balance.
Researcher Nadine Mengis investigates climate engineering methods' impact on interconnected variables, including solar radiation management and ocean alkalinity enhancement. Her study highlights the need for a holistic approach to understanding these projects' effects.
Scientists at the University of Sydney have modelled how marine snow absorbs carbon dioxide over millennia, keeping the planet cool. The study found that carbonate accumulation in deep-sea sediments has increased significantly over time, with a net increase in total volume of carbonate sediments in the oceans.
Scientists have discovered that westerly winds strengthen ocean acidification in Southern Ocean, which is critical for predicting its impact on marine life. The study sheds light on the mechanisms driving this process and provides insights into improving prediction models.
Research finds US coastal waters are vulnerable to acidification, affecting marine life like salmon, sharks, and cod. Elevated CO2 levels can cause cognitive problems and disorientation in fish, particularly in colder northern waters. The study highlights the need for sustained ocean observations to track coastal chemistry trends.
A new study reveals that acidic oceans impact fish ability to detect odors, affecting their food, habitat and predator avoidance
Researchers estimate early Earth's climate as temperate, with temperatures ranging from 0-50 °C. Ocean pH increased steadily from acidic to mildly basic over the past 4 billion years.
A new study found that pink sea urchin species are less vulnerable to climate change than other urchin species. The species is abundant at depths similar to spot prawn fishers and produces edible roe during winter. Legalizing fishing of pink sea urchin as bycatch could relieve pressure on vulnerable species.
The study found a 'pH minimum zone' 10 times more acidic than surface waters, posing risks to marine species like oysters and crabs. Oyster decline may hinder the bay's ability to deal with acidity.
Coral skeleton formation occurs within tissue, contrary to previous understanding that particles precipitate from surrounding water. This finding may improve paleoclimate reconstructions and enhance coral resilience research.
A three-year survey found highly acidic water throughout the California Current System, with "hotspots" of pH measurements as low as any oceanic surface waters in the world. Researchers identified refuges of more moderate pH environments that could be used to manage ecosystems and mitigate the effects of acidification.
Foraminifera, single-celled organisms that form the base of marine food webs, struggle to build their shells and make spines in high CO2 environments. This study suggests that stressed foraminifera could indicate a larger scale disruption of carbon cycling in the ocean.
Researchers developed a model suggesting early oceans were acidic, with pH between 6.0 and 7.5, conducive to primitive life's existence. Higher CO2 levels controlled ocean acidity, influencing chemical weathering and ion fluxes.
A recent study published in Nature Communications reveals that northern oceans pumped CO2 into the atmosphere during past natural climate changes, contradicting previous assumptions of ocean's role. The research found that areas in Norwegian Sea released more greenhouse gas into the air during severe cooling periods.
Researchers report rapid expansion of ocean acidification in the western Arctic Ocean, with waters becoming more acidic and extending deeper. This phenomenon threatens marine life, including clams, mussels, and pteropods, which are crucial to the diet of salmon and herring.
Sea snails, such as periwinkles, can speed up their shell-making process and produce less-dense shells in response to acidifying oceans. This adaptation may suggest that these organisms could be more resistant to future, harsher ocean conditions.
Ocean acidification is threatening mussel farming industries as mussels' ability to attach themselves to surfaces weakens in acidic conditions. The pH level plays a critical role in the attachment process, and changes in ocean chemistry are expected to impact mussel communities.
A study by University of California - Davis found that ocean acidification makes it harder for sea snails to escape from predatory sea stars. Lower pH levels impaired the snails' ability to sense and respond to the predators, with a tipping point at pH levels as low as 7.1.
A University of Miami-led study shows that the North Atlantic absorbed 100% more man-made carbon dioxide over the last decade, impacting ocean life and marine organisms. The findings highlight the importance of reducing fossil fuel emissions to mitigate the effects on the oceans.
Ocean acidification is affecting global marine ecosystems, with the Arctic and Antarctic oceans being particularly vulnerable. The study reveals that waters with lower aragonite saturation state are more corrosive to shellfish and coral species.
A new study reveals that the Arctic Ocean is rapidly becoming more corrosive to marine species, with surface waters of the Chukchi and Beaufort seas reaching levels of acidity that threaten shell-building animals by 2030. The Bering Sea is expected to reach this level of acidity by 2044.
A team of scientists has developed a new chemical model to determine the pH of Enceladus' ocean, finding it to be salty and alkaline with a pH of 11-12. This suggests that serpentinization, a geochemical process, could have created conditions suitable for life on the moon.
Scientists from GEOMAR Helmholtz Centre for Ocean Research Kiel reconstructed pH values of northern Pacific ocean over past 120 years with monthly resolution. The study found that the pH value has been declining since late 19th century, coinciding with rising carbon dioxide levels in atmosphere.
A new analysis finds that ocean acidification could significantly impact up to 21-32% of calcifying marine species, including coral, clams, and sea urchins. This widespread impact could have far-reaching consequences for ecosystems worldwide, as these species provide essential nursery habitats and food sources for other marine organisms.
Ocean acidity levels vary across the world's oceans, with the northern Indian Ocean being at least 10 percent more acidic than other regions. Ocean acidification could harm marine life and ecosystems, particularly coral reefs, if left unchecked.
Researchers found that animal communities in Sargassum rafts were significantly less diverse than those observed in the 1970s, with 13 species missing from recent samples. The study suggests that long-term shifts in ocean conditions may be contributing to the decline, but further research is needed to confirm this.
A new study suggests that sharks' ability to sense the smell of food may be impaired by rising atmospheric carbon dioxide levels. Adult sharks avoided squid odor after swimming in a pool of water treated with carbon dioxide concentrations consistent with climate forecasts for midcentury and 2100.
Ocean acidification is driving changes in vital Alaskan waters, threatening commercial fisheries and subsistence way of life. Communities in southeast and southwest Alaska face the highest risk, with lower incomes and fewer employment opportunities making them more vulnerable.
Soft coral tissue has been found to protect reef skeletons from declining pH levels, potentially providing a new approach to preserving coral reefs. The study, published in PLOS One, highlights the resilience of soft corals and their potential role in maintaining the health of coral reefs.
Researchers found that Japanese sea catfish use sensory nerve fibers to detect slight changes in water pH caused by respiration of small sea worms, allowing them to locate live prey. This discovery highlights the potential effects of ocean acidification on marine vertebrates.
Scientists have quantified the extent of surface ocean acidity from ancient days, finding that the oceans are on track to acidify at least as much as they did 56 million years ago, but at a much faster rate. The study confirms that acidification lasted for 70,000 years or more and may already be affecting marine life.
Researchers at Duke University documented dramatic short-term increases in a North Carolina estuary's acidity, exceeding global predictions and potentially harming shelled organisms. The study highlights the need to consider multiple environmental variables to predict ocean acidification effects.
Scientists report nearly double coastal erosion speed in Eastern Siberia due to rising summer temperatures and Arctic sea ice retreat. The study reveals a significant increase in wave-driven erosion, with the island of Muostakh at risk of disappearing.
A novel theory, proposed by Michael Russell and colleagues, suggests that life arose from geochemical processes, including serpentinization, which produced essential components for life. This theory could provide insights into the origins of life and potentially shed light on its existence elsewhere in the universe.
A new study finds that oyster reefs can buffer acidic inputs to Chesapeake Bay, providing a key ecosystem service. Restoring oysters could help moderate ocean acidity and support marine life.
The report outlines how climate change could affect habitats, plants and animals within the sanctuary, as well as adjacent coastal areas. Climate change poses a grave threat to the health of the ocean, with impacts felt in marine protected areas like the Olympic Coast sanctuary.
A new study published in Environmental Research Letters analyzes the benefits and drawbacks of dissolving particles in ocean surfaces to increase marine uptake of carbon dioxide. The researchers find that this approach would only compensate for around 9% of present-day anthropogenic CO2 emissions, highlighting its inefficiency.
Researchers predict that global warming will acidify saltwater sufficiently to make low-frequency sound travel twice as far as it currently does. This could lead to a clearer understanding of the sound environment of marine mammals and the effects of human activity on their habitats.