Ancient Alaskan Cod Bones Show More Mercury in the Food Chain as Sea Levels Rise
SEAFOODNEWS.COM [Alaska Dispatch News] by Yereth Rosen - March 2, 2015
Ancient cod bones unearthed at an Alaska archaeological site carry a very modern warning for a world with a rapidly changing climate -- as sea levels rise, so do levels of mercury in the food chain.
The bones, discovered at a coastal site in Katmai National Park and Preserve, date back to the early and mid-Holocene, a time when a warming climate melted glaciers and expanded the oceans. The rising seas inundating the Bering Land Bridge and other stretches of terrain caused some of the naturally occurring mercury that was locked in dry or frozen land to get free and disperse in the expanded marine waters.
The high levels of mercury in the cod bones are described in a study published in the journal Frontiers in Environmental Science...
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