Posted on July 7, 2015 by Bob Berwyn
Coral reefs in the Caribbean, like this one in the U.S. Virgin Islands, are at risk of bleaching as global warming heats up the world’s oceans. Photo by Caroline Rogers/USGS.
Warm oceans leading to widespread reef bleaching
FRISCO — Ocean researchers have updated their warnings of potential coral reef bleaching based on unusually warm ocean temperatures across the north Pacific, equatorial Pacific, and western Atlantic oceans this summer.
Scientists with NOAA’s coral reef watch say they expect bleaching of corals on Northern Hemisphere reefs through October, potentially leading to the death of corals over a wide area and affecting the long-term supply of fish and shellfish.
“The bleaching that started in June 2014 has been really bad for corals in the western Pacific,” said Mark Eakin, NOAA Coral Reef Watch coordinator. “We are worried that bleaching will spread to the western Atlantic and again into Hawaii.” Continue reading
Filed under: climate and weather, climate change, coral reefs, El Niño, global warming | Tagged: Coral bleaching, coral reefs, El Nino, global warming, NOAA, oceans | Leave a comment »
Posted on June 26, 2015 by Bob Berwyn
Can a genetic ‘mix-and-match effort save some coral species from global warming? Photo courtesy NOAA.
Mixing and matching corals from different latitudes may boost reef survival
FRISCO — If global warming can be capped at a reasonable level, some coral reefs may have a fighting chance to adapt to warmer ocean waters, according to new genetic research.
The new study suggests some coral species already have genetic variants necessary to tolerate warm ocean waters, and humans can help to spread these genes, said a team of scientists from The University of Texas at Austin, the Australian Institute of Marine Science and Oregon State University. Continue reading
Filed under: climate change, coral reefs, Environment, global warming | Tagged: climate change, coral reefs, Environment, genetic diversity, global warming, oceans | Leave a comment »
Posted on June 4, 2015 by Bob Berwyn
Coral reefs may not be completely doomed after all, although it may all depend on exactly how hot it gets.
New study says temperature thresholds not the end-all to coral reef survival
FRISCO — Many coral reefs will definitely struggle to survive the global warming era, but the devastation may not be as widespread as once believed.
New research that looked beyond simple temperature thresholds shows a more nuanced picture in which the survival of reefs is linked not only to temperatures, but to how they respond to other stress, including pollution. Continue reading
Filed under: biodiversity, climate and weather, climate change, coral reefs, global warming | Tagged: climate change, coral reefs, global warming, oceans | 1 Comment »
Posted on May 15, 2015 by Bob Berwyn
Scientists say more study needed before the next big spill
Oil from the Deepwater Horizon disaster approaches the Alabama coastline. Courtesy U.S. Navy.
FRISCO — Fallout from the 2010 Deepwater Horizon oil disaster is still rippling through the Gulf of Mexico — and through the scientific community studying the effects of the largest oil spill on record.
Along with 210 million gallons of crude oil that leaked from BP’s failed deep-sea well, cleanup workers applied 1.84 million gallons of chemical dispersant intended to break down the oil and prevent it from reaching the shoreline in massive quantities. Continue reading
Filed under: BP Gulf oil spill, coral reefs, Environment, gas drilling, Marine biology, oil drilling | Tagged: BP Gulf oil spill, Deepwater horizon oil spill, dispersants, Gulf of Mexico | 1 Comment »
Posted on May 8, 2015 by Bob Berwyn
A NASA satellite photo shows a slice of Australia’s Great Barrier Reef.
Ancient climate clues warn about impacts of modern human activities
FRISCO — Turbulent seas, loaded with sediment and nutrients at the end of the last ice age likely set back growth of the Great Barrier Reef by centuries, according to scientists who recently took a close look at the reef’s biological history.
The findings are important because those environmental conditions are similar to what the Great Barrier Reef is experiencing today as a result of human activities, including the controversial coal port dredging that’s seen as a huge threat to Australia’s cherished ocean landmark. Continue reading
Filed under: biodiversity, climate and weather, coral reefs, Environment | Tagged: climate change, coral reefs, Environment, Great Barrier Reef, oceans | Leave a comment »
Posted on April 27, 2015 by Bob Berwyn
Australian study shows how recreational and commercial fishing affect reef health
FRISCO —Biologists have long known that removing key predators from the food chain has top-down impacts on ecosystems, and a new study by Australian researchers shows the same holds true for coral reefs. Fishing, they say, is having a big impact on the Great Barrier Reef.
The loss of species like coral trout and snappers has altered the balance and structure of the coral reef ecosystem, raising the number of herbivorous and small prey fish, the scientists concluded after comparing fish abundance in protected parts of the reef with other areas. Continue reading
Filed under: biodiversity, coral reefs, Environment | Tagged: apex predators, ARC Centre of Excellence for Coral Reef Studies, coral reefs, Great Barrier Reef, groupers, Parrotfish | Leave a comment »
Posted on April 9, 2015 by Bob Berwyn
As early as 2012, scientists documented how oil and oil dispersants damaged communities of deep sea coral in the Gulf of Mexico. Photo courtesy Lophelia II 2010, NOAA OER and BOEMR.
‘It doesn’t take as much dispersant to kill a coral as it does oil’
FRISCO — New laboratory studies on the use of oil dispersants during the 2010 Deepwater Horizon oil spill show that the dispersant is more toxic to coldwater corals than the spilled oil.
The findings, published near the fifth anniversary of the spill, may help agencies developing future strategies for applying dispersants at oil spills that are more helpful than harmful to the environment, according to the scientists from Temple University and Penn State University. Continue reading
Filed under: BP Gulf oil spill, coral reefs, Environment | Tagged: coral reefs, corals, Deepwater horizon oil spill, oil spill dispersants | Leave a comment »