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World’s coral reefs face new peril from beneath within decades

The world’s coral reefs, already enduring multiple threats from bleaching to nutrient run-off from farming, also face another challenge – this time from below. New research, published in the journal Science on Friday, has found the sediments on which many reefs are built are 10 times more sensitive to the acidifying oceans than the living corals themselves. […]

Our acid oceans will dissolve coral reef sands within decades

Carbonate sands on coral reefs will start dissolving within about 30 years, on average, as oceans become more acidic, new research published today in Science shows. Carbonate sands, which accumulate over thousands of years from the breakdown of coral and other reef organisms, are the building material for the frameworks of coral reefs and shallow […]

Coral reefs at risk of dissolving as oceans get more acidic: study

OSLO (Reuters) – Coral reefs could start to dissolve before 2100 as man-made climate change drives acidification of the oceans, scientists said on Thursday. Acidification will threaten sediments that are building blocks for reefs. Corals already face risks from ocean temperatures, pollution and overfishing. Show More Summary

Coral reefs at risk of losing building material by end of century

A new study suggests that by 2050, most coral reefs around the world are at risk of experiencing constant depletion of one of their building blocks – calcium carbonate sediments. A few reefs are already experiencing this state, called net sediment dissolution, which greatly hinders the growth of coral reefs and consequently impacts the health […]

Coral reefs will transition to net dissolving before end of century

Ocean acidification refers to the lowering of the ocean’s pH due to the uptake of anthropogenic CO2 from the atmosphere. Coral reef calcification is expected to decrease as the oceans become more acidic. Dissolving calcium carbonate (CaCO3) sands could greatly exacerbate reef loss associated with reduced calcification but is presently poorly constrained. Here we show […]

Macroalgal response to a warmer ocean with higher CO2 concentration

Highlights • Decreased pH had a positive effect on short-term production of the studied species. • Algae with tropical affinity increased their production at higher temperatures. • Respiration rates were higher at the lower temperature treatments. Show More Summary

Effects of carbamazepine and cetirizine under an ocean acidification scenario on the biochemical and transcriptome responses of the clam Ruditapes philippinarum

Highlights • Drugs were bioconcentrated at both pH conditions (7.8 and 7.5). • Uptake and BCF of CTZ decreased comparing low pH (7.5) with control pH (7.8). • No oxidative stress was induced by drug exposure and/or pH. • Exposure to drugs or low pH changed mRNA levels. • Drug exposure and ocean acidification interaction […]

Elevated CO2 delays the early development of scleractinian coral Acropora gemmifera

The effects of elevated CO2 on the early life stages of coral were investigated by culturing the pelagic larvae and new recruits of Acropora gemmifera at three concentrations of CO2 (corresponding to pH?=?8.1, 7.8 and 7.5, respectively). Acidified seawater resulted in fewer A. gemmifera larvae settling, and led to the production of smaller new recruits […]

Carbonate chemistry of an in-situ free-ocean CO2 enrichment experiment (antFOCE) in comparison to short term variation in Antarctic coastal waters

Free-ocean CO2 enrichment (FOCE) experiments have been deployed in marine ecosystems to manipulate carbonate system conditions to those predicted in future oceans. We investigated whether the pH/carbonate chemistry of extremely coldShow More Summary

Ecological responses to ocean acidification by developing marine fouling communities

Increasing levels of CO2 in the atmosphere are rapidly affecting ocean chemistry, leading to increased acidification (i.e., decreased pH) and reductions in calcium carbonate saturation state. This phenomenon, known as ocean acidification, poses a serious imminent threat to marine species, especially those that use calcium carbonate. Show More Summary

Ocean acidification affects both the predator and prey to alter interactions between the oyster Crassostrea gigas (Thunberg, 1793) and the whelk Tenguella marginalba (Blainville, 1832)

As the oceans acidify, marine invertebrates will experience physiological and behavioural changes that may alter how predators interact with their prey. This study assessed whether ocean acidification alters the predatory whelk Tenguella marginalba, their prey, the Pacific oyster, Crassostrea gigas, and their interactions. Show More Summary

Population-specific responses in physiological rates of Emiliania huxleyi to a broad CO2 range

Although coccolithophore physiological responses to CO2-induced changes in seawater carbonate chemistry have been widely studied in the past, there is limited knowledge on the variability of physiological responses between populations. Show More Summary

Update to SDG14.3 Voluntary Committment: Enhancing global ocean acidification monitoring and research by GOA-ON

Update from 25 January 2018: GOA-ON contributes to the Sustainable Development Goals and the 2030 Agenda The 2030 Agenda for Sustainable Development, adopted in September 2015 by the United Nations, contains 17 Sustainable Development Goals (SDGs). Goal 14, life below water, is to conserve and sustainably use the oceans, seas, and marine resources, and consists […]

How oysters, mussels, and corals help marine vegetation buffer ocean acidification

  Ocean acidification is already threatening marine life around the world, and conditions are only expected to worsen in the coming years. But for certain shoreline environments, there may be a workaround. Researchers have discovered that marine vegetation such as seaweed and seagrass exert such a strong mitigating effect on local water acidification that they […]

Ocean acidification is dissolving starfish

Although warming water temperatures get much of the negative press when it comes to our oceans, ocean acidification is wreaking havoc as well. Most divers know that waters are warming around the world, and this is leading to all manner of negative impacts for the oceans. But ocean acidification could present just as large a […]

‘Cli-fi’ author tests the waters of tomorrow in Alaska-set novel

In a future where fresh water is so scarce as to inspire bloody wars, a teenage apprentice must learn from her father the location and caring of a secret natural spring, one of the last in the world. A gifted young mathematician in near-future New York crafts worst-case scenarios for a mysterious financial consulting firm, […]

Interactive effects of seawater carbonate chemistry, light intensity and nutrient availability on physiology and calcification of the coccolithophore Emiliania huxleyi

Rising atmospheric carbonate dioxide (CO2) levels lead to increasing CO2 concentration and declining pH in seawater, as well as ocean warming. This enhances stratification and shoals the upper mixed layer (UML), hindering the transport of nutrients from deeper waters and exposing phytoplankton to increased light intensities. Show More Summary

Simultaneous shifts in elemental stoichiometry and fatty acids of Emiliania huxleyi in response to environmental changes

Climate-driven changes in environmental conditions have significant and complex effects on marine ecosystems. Variability in phytoplankton elements and biochemicals can be important for global ocean biogeochemistry and ecological functions,...Show More Summary

Inorganic carbon fluxes on the Mackenzie Shelf of the Beaufort Sea (update)

The Mackenzie Shelf in the southeastern Beaufort Sea is a region that has experienced large changes in the past several decades as warming, sea-ice loss, and increased river discharge have altered carbon cycling. Upwelling and downwelling events are common on the shelf, caused by strong, fluctuating along-shore winds, resulting in cross-shelf Ekman transport, and an […]

Towards an autonomous microfluidic sensor for dissolved carbon dioxide determination

Highlights •A microfluidic sensor for dissolved carbon dioxide determination in aqueous environments has been developed. •The design of a microfluidic chip coupled with a white LED and a colour detector successfully formed the detection system. Show More Summary

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