Posted on April 13, 2012 by Bob Berwyn
Research links ocean acidification with stunted larval growth
If you enjoy fresh oysters, eat up, because global warming and ocean acidification are taking a toll on the reproduction of the popular shellfish. PHOTO BY BOB BERWYN.
SUMMIT COUNTY — An Oregon oyster farm may have to shut down because increasing increasing carbon dioxide concentrations in sea water has stunted larval growth, making the operation “non-economically viable.”
Researchers found that the sea water is becoming more corrosive, inhibiting larval oysters from developing their shells and growing at a pace that would make commercial production cost-effective.
As atmospheric CO2 levels continue to rise, the Oregon oysters may be the proverbial canary in the coal mine for other ocean acidification impacts on shellfish, according to Oregon State University scientists. (more…)
Filed under: biodiversity, climate and weather, Environment, global warming | Tagged: climate, global warming, National Oceanic and Atmospheric Administration, Netarts Bay, ocean acidification, Oceanography, Oregon, Oregon State University, oysters | Leave a Comment »
Posted on January 13, 2012 by Bob Berwyn
Hydrothermal 'black smoker' vents near the Cayman Islands may offer new clues to the dispersal of deep sea organisms. PHOTO COURTESY NOAA.
Research offers new clues to sea-floor formation, dispersal of deep-ocean organisms
By Summit Voice
SUMMIT COUNTY — British oceanographers and biologists say a group of volcanic vents on the Caribbean seafloor are the deepest discovered to-date, and another field of vents on a nearby submerged mountain suggests that so-called black smoker hydrothermal vents may be much more common than previously believed.
The vents — about three miles deep in a rift in the Cayman Trough, south of the Cayman Islands — may be hotter than 450 °C and are shooting a jet of mineral-laden water more than a kilometre into the ocean above.Despite extreme conditions, the vents are teeming with a new species of shrimp that has a light-sensing organ on its back.
Results of the 2010 expedition were reported this week in the scientific journal Nature Communications. The deep-sea research was led by marine geochemist Doug Connelly at the National Oceanography Centre in Southampton and marine biologist Jon Copley of the University of Southampton. (more…)
Filed under: biodiversity, Environment, Summit County news | Tagged: Caribbean, Geology, Hydrothermal vent, marine biology, National Oceanography Centre in Southampton, Oceanography | 1 Comment »
Posted on October 18, 2010 by Bob Berwyn
Corallium rubrum and other deep-sea corals are affected by ocean acidification.
National Science Foundation awards multiple grants to integrate various disciplines, including paleoecology, physics and marine chemistry
By Summit Voice
SUMMIT COUNTY — In addition to the most obvious effects of global warming — beetle kill, melting glaciers, more forest fires — oceans are feeling the effect of the changing climate in a much more subtle way. As atmospheric carbon dioxide increases, it’s making its way into marine ecosystems, and the water is growing increasingly acidic.
Animal species from pteropods–delicate, butterfly-like planktonic drifters–to hard corals are affected by ocean acidification; so, too, are unseen microbes that fuel ocean productivity and influence the chemical functioning of ocean waters.
As oceans become more acidic, the balance of molecules needed for shell-bearing organisms to manufacture shells and skeletons is altered. The physiology of many marine species, from microbes to fish, may be affected. A myriad of chemical reactions and cycles are influenced by the pH of the oceans. (more…)
Filed under: Environment, global warming, Summit County Colorado | Tagged: Earth science, Environment, Karl Erb, ocean acidification, Oceanography, Summit County Colorado, Summit County News | Leave a Comment »