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Climate: Increasing CO2 killing oyster larvae

Love oysters? Then you should be worried about global warming.

Love oysters? Then you should be worried about global warming and ocean acidification. bberwyn photo.

Natural buffering can’t keep up with increasing ocean acidification

Staff Report

FRISCO — Oysters at their earliest stages of development are already feeling the impacts of ocean acidification, scientists said this week, explaining that oyster larvae are sensitive to saturation state, rather than carbon dioxide or pH per se.

The saturation state is a measure of how corrosive seawater is to the calcium carbonate shells made by bivalve larvae, and how easy it is for larvae to produce their shells. A lower saturation rate is associated with more corrosive seawater. Continue reading

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Can some Caribbean corals survive global warming?

Coral and other marine resources in the Florida Keys are at risk from an approaching oil plume.

Some corals are less sensitive to ocean acidification than others, according to a new study. Photo via NOAA.

Study say soft Gorgonian coral species can still calcify under elevated CO2 levels

Staff Report

FRISCO — Not all corals are equal when it comes to withstanding the ravages of global warming.

Some Caribbean soft corals, known as gorgonians, may be able to calcify and grow under elevated carbon dioxide concentrations. Those corals may be more resilient to the ocean acidification levels projected by the end of the 21st century than previously thought, according to a new study published in the journal Coral Reef. Continue reading

New maps detail ocean acidification patterns

n northern winter, the Bering Sea, dividing Alaska and Siberia, becomes the most acidic region on earth (in purple) as shown in this February 2005 acidity map in pH scale. Temperate oceans are less acidic. The equatorial Pacific is left blank due to its high variability around El Niño and La Niña events. (Takahashi

During the northern hemisphere winter, the Bering Sea, dividing Alaska and Siberia, becomes the most acidic region on earth (in purple) as shown in this February 2005 acidity map in pH scale. Temperate oceans are less acidic. The equatorial Pacific is left blank due to its high variability around El Niño and La Niña events. Map courtesy Taro Takahashi.

New benchmark data will help track future changes

Staff Report

FRISCO — The world’s oceans are acidifying at a rate of about 5 percent each decade, a trend that could cost the global economy $3 trillion a year in lost revenue from fishing, tourism and other intangible lost ecosystem services.

At that pace, warm-water corals by the end of the century could be living in waters 25 percent more acidic than they are today, raising questions about the long-term survival of coral reef ecosystems.

To paint a more detailed picture of potential impacts, scientists have created an ocean acidification map, showing how how acidity levels vary across the world’s oceans. The data should help provide a benchmark for the future, as enormous amounts CO2 from fossil fuels ends up in the sea. Continue reading

GAO report finds lagging response to ocean acidification

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Ocean acidification is an existential threat to many marine species and ecosystems.

Federal government has failed to implement several key steps required by 2009 law

By Summit Voice

FRISCO — Federal agencies well recognize the environmental threats of increasing ocean acidification, but so far, the response has been lackluster at best, according to the Government Accountability Office.

In a report issued this week, the GAO said federal agencies have been slow in implementing several requirements of the 2009 Federal Ocean Acidification Research and Monitoring Act, including outlining the budget requirements for implementing the research and monitoring plan. Continue reading

Climate: Ocean acidification may be stunting coral growth

Mapping coral diseases is helping researchers determine the cause. Photo courtesy NOAA.

Coral growth is slowing dramatically along parts of the Great Barrier Reef. Photo courtesy NOAA.

Will the world’s coral reefs simply dissolve as oceans become more acidic?

Staff Report

FRISCO — Scientists monitoring the Great Barrier Reef said they’ve tracked a “perilous” 40 percent slowdown in coral growth rates since the 1970s.

The trend may be linked with increasing ocean acidification, according to the new study led  by researchers with the Carnegie Institution for Science.

The researchers compared current measurements of the growth rate of a section of Australia’s Great Barrier Reef with similar measurements taken more than 30 years ago. Continue reading

Report IDs ocean acidification threats to Alaska’s coastal resources, Native American communities

Important crab fisheries to suffer as oceans turn warm and acidiic

A nice haul of blue crabs.

Crabs are among the many commercially important species that will struggle as oceans grow warmer and more acidic. bberwyn photo.

Staff Report

FRISCO —Alaska’s economically important crab fishery and other coastal and ocean resources face significant global warming threats, according to a new study led by scientists with the National Oceanic and Atmospheric Administration. The research findings, to be published online in the journal Progress in Oceanography, show that many of Alaska’s nutritionally and economically valuable marine fisheries are located in waters that are already experiencing ocean acidification.

Communities in southeast and southwest Alaska face the highest risk from ocean acidification because they rely heavily on fisheries that are expected to be most affected by ocean acidification. Some of those Native American communities are also more vulnerable to economic risks because of lower average incomes and  fewer employment opportunities, NOAA said in a press release. Continue reading

Report shows global warming threats to Mediterranean

‘We all need to act and there is no time to lose’

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The Ionian Sea near Ksamil, Albania. bberwyn photo.

Staff Report

FRISCO — There’s no reason to believe that any of the world’s oceans will be spared the effects of global warming and ocean acidification, including the Mediterranean Sea, where rapid changes threaten numerous species and entire ecosystems, according to a new report from a team of European researchers.

“We knew next to nothing about the combined effects of warming and acidification in the Mediterranean until this study, now we know that they are a serious double threat to our marine ecosystems,” said project coordinator Patrizia Ziveri, from Institute of Environmental Science and Technology at the Universitat Autonoma de Barcelona. Continue reading

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