A Maine woman has been sentenced to one year of probation for stealing more than $7,000 while working for the National Park Service at Yellowstone National Park. Danel Nickerson of Kittery was sentenced Thursday in U.S. District Court in Portland. The 45-year-old Nickerson pleaded guilty in May to stealing $7,429 while she worked in the Wyoming park’s cash-counting office in the summer of 2007. The judge also ordered Nickerson to pay restitution and a $1,200 fine. Prosecutors said Nickerson has already paid back the money.