In ecology news– land-walking octopi, turtle locomotion, Pebble Mine science, fracking, Neanderthal love

This post contributed by Liza Lester, ESA communications officer An unusual crowd converged at the recent meeting of the Arctic Division of the American Association for Science in Dillingham, AK. Over 150 locals joined the 75 meeting attendants to discuss technical and scientific questions about development of a very large copper mine in the area. The fight over the proposed Pebble Mine has been under way for much of the last decade, with passionate verbal artillery flying from both sides. John Shively, CEO of the mining conglomerate Pebble Limited Partnership, was on hand to discuss the interests of the mine. Bryce Edgmon, who represents the region in the Alaska State Legislature, described the pro-mining atmosphere in Juneau. With oil revenues declining, state government is looking to mining to fill the gap. The Pebble claim sits at the headwaters of two major salmon spawning rivers, the Nushagak and Kvichak, which flow into Bristol Bay, the largest and most profitable salmon fishery in the world. The mining company promises unprecedented technological feats to secure mine tailings and contain dangerous, contaminated water behind dams up to 740 feet high. But members of the half-billion a year salmon industry are worried. The sport fishing industry, environmental organizations, and Alaska Native groups reliant on subsistence fishing have joined them in resisting exploitation of the deposit. Pebble has the potential to become one of the largest mines in the world, holding an estimated 80.6 billion pounds of copper and smaller amounts of gold, molybdenum, silver, rhenium and palladium worth 300-500 billion dollars. The ore also contains sulfides, which will be exposed to the elements by the digging and crushing of the mining process. Without stringent mitigation, sulfuric acid drainage from the mine will profoundly change the chemistry of the watershed. Pebble Partnership is cagy about its exact plans for the site, but it is likely that the open pit mine would cover two square miles and would require an enormous amount of power from a source yet to be identified. During the public forum, CEO Shively offered the Fraser River near Vancouver, British Columbia, as evidence that salmon and mining can coexist. Not everyone agrees. The Fraser had an unexplained record run of 36 million fish in 2010 after a decade of decline (2009’s run was below 2 million). The river hosts two copper mines, including Highland Valley, the largest copper mine in Canada, in operation since the 1970s. Scientists say that only 5 grams of copper (about 2 pennies) in 1 million liters of water (around the volume of public swimming pool)  is enough to screw up salmon’s sense of smell and cause them...

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