Killed or drove away all fish in the region.
When a new underwater volcano formed south of El Hierro island in October 2011, it was the first chance in 500 years to watch the local ecosystem evolve in response to an eruption, says this article on LiveScience.com.
Researcher Eugenio Fraile-Nuez of Spain’s Instituto Español de Oceanografía and his colleagues have been monitoring the volcano since then, measuring its effect on ocean temperature, salinity, carbon dioxide content and more.
“The eruption killed or drove away all of the fish in the region (though many were seen floating dead on the ocean’s surface), the researchers found. Some phytoplankton, or the floating plants that sit at the bottom of the ocean food chain, were able to adapt.”
“Over the crater, the water heated up by as much as 65 degrees Fahrenheit (18.8C), the researchers found. Dissolved oxygen in the water all but disappeared, decreasing by 90 percent to 100 percent in places. Meanwhile, carbon and carbon dioxide values shot up, and the pH of the water went down by 2.8, meaning it became more acidic.”
The water heated up by as much as 65 F? Gee, I wonder what is heating our oceans?
Carbon dioxide values shot up without any help from humans? Hmmmm.
“The underwater eruption killed a massive amount of plankton in deep waters. In their place, a community of carbon-eating bacteria sprung up, many of which shone with bright green fluorescence.”
The article then, predictably, goes on to link the eruption to global warming, saying that “increase in temperature, decrease in oxygen and a more acidic pH is exactly what scientists would expect to be the result of global warming for the ocean.”
Fraile-Nuez and his colleagues detailed their results online this week in the open-access journal Scientific Reports.
See entire article:
Thanks to Laurel for this link