Posted on January 23, 2015 by Bob Berwyn
New study projects staggering coral losses as oceans warm
A school of surgeonfish cruise coral reefs in the Pacific. Photo courtesy NOAA.
*More Summit Voice reporting on coral reefs
FRISCO —Even under a moderate climate change scenario, with just 1 to 2 degrees Celsius warming, the Great Barrier Reef may be doomed to become just a shadow of itself within a few decades, researcher said this week, warning of the cumulative impacts of warmer water, acidification, pollution and over-fishing.
In the short term, the combined effects of those impacts enable seaweed to over-run corals, in effect suffocating them. In the longer term, interactions among reef organisms would lead to dominance by other groups, including sponges and soft corals known as gorgonians. Continue reading
Filed under: climate and weather, coral reefs, Environment, global warming, ocean acidification | Tagged: climate change, global warming, Great Barrier Reef, ocean acidification | Leave a comment »
Posted on January 6, 2015 by Bob Berwyn
Antarctic sea urchins may be able to adapt to global warming. Photo courtesy NOAA.
Lab testing measures response to rising temps, increasing acidification
FRISCO — Sea urchins around the Antarctic Peninsula are able to adapt to warmer and more acidic seawater conditions expected by the end of the century, at least in a laboratory setting.
The study, led by scientists from the British Antarctic Survey and Bangor University, involved collecting 288 sea urchins and and transporting them to the British Antarctic Survey in Cambridge, UK. Continue reading
Filed under: Antarctica, Environment, global warming, ocean acidification | Tagged: Antarctica, British Antarctic Survey, global warming, ocean acidification | Leave a comment »
Posted on December 17, 2014 by Bob Berwyn
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
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
Filed under: climate and weather, Environment, global warming, ocean acidification | Tagged: climate adaptation, global warming, ocean acidification, oceans, oyster hatcheries, Shellfish | Leave a comment »
Posted on December 12, 2014 by Bob Berwyn
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
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
Filed under: biodiversity, climate and weather, coral reefs, Environment, global warming, ocean acidification | Tagged: climate change, coral reefs, global warming, ocean acidification, oceans | Leave a comment »
Posted on November 11, 2014 by Bob Berwyn
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
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
Filed under: biodiversity, coral reefs, Environment, Marine biology, ocean conservation | Tagged: climate change, CO2, Environment, global warming, greenhouse gases, ocean acidification | Leave a comment »
Posted on October 16, 2014 by Bob Berwyn
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
Filed under: climate and weather, global warming, ocean acidification | Tagged: Environment, global warming, greenhouse gases, ocean acidification, oceans | Leave a comment »
Posted on September 17, 2014 by Bob Berwyn
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?
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
Filed under: biodiversity, climate and weather, coral reefs, Environment, global warming, ocean acidification | Tagged: carbon dioxide, climate change, CO2, coral reefs, greenhouse gases, ocean acidification | 1 Comment »