 The virgin forests cooled the land and streams . The creeks and runs flowed more evenly year @-@ round , since centuries of accumulated organic matter in the forest soil caused slow percolation of rainfall into them . Pine Creek was home to large numbers of fish , including trout , but dams downstream on the Susquehanna River have eliminated the shad , salmon , and eels once found here by blocking their migrations . Habitat for land animals was destroyed by the clearcutting of forests , but there was also a great deal of hunting , with bounties paid for large predators . 
