Posted on February 25, 2015 by Bob Berwyn
Elkhorn coral in the Caribbean Sea. Photo via NOAA.
‘Our data show that climate change has helped drive down staghorn and elkhorn corals …’
FRISCO — Elkhorn and staghorn corals, once widespread across the Caribbean, have all but disappeared from the region, and scientists at the Florida Institute of Technology think they know why — ocean warming has been a big factor in the die-off, making the corals more susceptible to white-band disease.
“Our data show that climate change has helped drive down staghorn and elkhorn corals by boosting white-band disease,” said Florida Tech Ph.D. student Carly Randall. “We still don’t know if the disease is caused by a marine microbe, but now we do know that changes in the environment contributed to the problem.” Continue reading
Filed under: climate and weather, coral reefs, Environment, global warming | Tagged: Caribbean, coral reefs, elkhorn coral, global warming, staghorn coral, white-band disease | Leave a comment »
Posted on February 25, 2015 by Bob Berwyn
A satellite view of the Great Barrier Reef, via NOAA.
Plastic micro-pollution adds insult to injury for stressed coral reefs
FRISCO — Widespread micro-plastic pollution may take a toll on the famed Great Barrier Reef, scientists said this week after discovering that coral organisms will ingest the tiny plastic particles.
“Corals are non-selective feeders and our results show that they can consume microplastics when the plastics are present in seawater,” said Dr, Mia Hoogenboom, a researchers with the ARC Centre of Excellence for Coral Reef Studies at James Cook University.
“If microplastic pollution increases on the Great Barrier Reef, corals could be negatively affected as their tiny stomach-cavities become full of indigestible plastic,” Hoogenboom added. Continue reading
Filed under: biodiversity, coral reefs, Environment | Tagged: coral reefs, Environment, micro-plastic pollution, oceans | 1 Comment »
Posted on February 24, 2015 by Bob Berwyn
Coral reefs near Panama stopped growing during an exstended phase of La Niña-like conditions in the Pacific Ocean. Photo courtesy NOAA.
‘It’s possible that anthropogenic climate change may once again be pushing these reefs towards another regional collapse …’
FRISCO — Past climate shifts resulting in La Niña-like conditions off the coast of Panamá resulted in a 2,500-year shutdown in coral reef growth, scientists said this week, warning that human-caused global warming could lead to similar conditions in the coming decades.
“We are in the midst of a major environmental change that will continue to stress corals over the coming decades, so the lesson from this study is that there are these systems such as coral reefs that are sensitive to environmental change and can go through this kind of wholesale collapse in response to these environmental changes,” said Kim Cobb, an associate professor in the School of Earth and Atmospheric Sciences at the Georgia Institute of Technology. Continue reading
Filed under: biodiversity, climate and weather, climate change, coral reefs, Environment, global warming, ocean acidification | Tagged: climate change, coral reef decline, coral reefs, global warming, La Niña, Panama | Leave a comment »
Posted on February 18, 2015 by Bob Berwyn
NOAA scientists say warm oceans pose risk to reefs
Vast areas of the world’s oceans are so warm that coral reefs may take a big hit this year, according to the latest coral-bleaching outlook from NOAA.
Pink coral at Rose Atoll in National Marine Sanctuary of American Samoa. Photo courtesy NOAA.
FRISCO — After reporting major coral-bleaching events in 2014, scientists with the National Oceanic and Atmospheric Administration are warning that continued warm ocean temperatures are setting the stage for a repeat in 2015.
The warning is spelled out in the most recent outlook from NOAA’s Coral Reef Watch, a weekly product that forecasts the potential for coral bleaching up to four months in the future. Just last summer, the federal government put 20 coral types on the Endangered Species List, citing climate change as a major threat. Continue reading
Filed under: biodiversity, climate and weather, climate change, coral reefs, Environment, global warming | Tagged: climate change, coral reefs, global warming, NOAA, warm oceans | Leave a comment »
Posted on January 4, 2015 by Bob Berwyn
Hawaii bleaching the worst on record
Coral reefs experienced major heat stress in 2014. Map courtesy NOAA Climate.gov – Dan Pisut.
FRISCO — Even without a surge of El Niño ocean heat, there was widespread coral bleaching across parts of the Pacific Ocean and the Caribbean this past summer.
Reefs in the Florida Keys saw their worst bleaching episode since 1997-1999, when a major El Niño was followed by strong La Niña conditions, NOAA scientists reported recently. The surprising intensity of bleaching across multiple ocean basins in 2014 has scientists wondering what to expect in 2015, when El Niño is forecasted to finally develop. Continue reading
Filed under: climate and weather, climate change, coral reefs, Environment, global warming | Tagged: Coral bleaching, coral reefs, Environment, global warming, oceans | Leave a comment »
Posted on December 23, 2014 by Bob Berwyn
Will global temps soar when trade winds weaken?
Coral chemistry shows strong link between winds and temperature regimes
FRISCO — In the complex climate puzzle of the Pacific Ocean, the trade winds may be a key piece regulating the rate of global warming, according to new research that links the intensity of those winds to global temperatures.
The study, led by scientists at the National Center for Atmospheric Research and the University of Arizona, tracked chemical changes in coral to show that when when trade winds weakened in the early 20th century, global temperatures warmed rapidly. When the natural pattern shifted and winds began to strengthen after 1940, the warming slowed. Continue reading
Filed under: Uncategorized, Environment, global warming, climate and weather, agriculture | Tagged: global warming, climate change, coral reefs, trade winds | 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: Environment, global warming, biodiversity, climate and weather, coral reefs, ocean acidification | Tagged: global warming, climate change, ocean acidification, coral reefs, oceans | Leave a comment »