The brook trout was nearly wiped out in the last century by two main contributing factors. First, the logging industry ravaged the landscape and the brook trout's habitat. Second, the loggers introduced the non-native species of rainbow trout into the streams of East Tennessee to offset the lost brook trout. "The rainbow trout has some advantages over the native brook trout. Between the rainbow trout and the logging industry, they wiped out about 75 percent of the brook trout population," said Moore. As part of the effort to save the brook trout, biologists first had to get rid of the non-native rainbow trout in the streams identified for restoration.