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Alkefjellet These thick-billed murre are still safe from predators on the cliff-ledge nest sites they have used for thousands of years. But the ice that used to be nearby is now melting ever further back into the central Arctic. This is a worry because the ice-edge zone provides the best foraging ground: fresh water pours from the melting ice, floats on top of the nearby salty seawater and traps plankton close to the light where it can bloom. Now this zone is moving out of reach of nesting birds. |