Ph.D candidate Ludda Ludwig, right, helps load a helicopter before a short flight to the Toolik Field Station from her research site near the headwaters of the Kuparuk River. Ludwig's study is focused on the movement of water and nutrients from Arctic hillslopes to streams. The Toolik research facility, located about 370 miles north of Fairbanks on Alaska's North Slope, is operated by UAF's Institute of Arctic Biology.

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