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Talaksan:ANF Old-Growth Forest (1).jpg

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Paglalarawan

Betula alleghaniensis — Yellow birch, old-growth fallen tree.

  • Within the Tionesta Research Natural Area of Allegheny National Forest, in Wetmore Township, McKean County, Pennsylvania.
  • The exposed, stilted roots have grown from the stump of long-ago fallen tree.


  • Remote and difficult to access, the research area protects an old-growth forest of hemlocks, white pines, and northern hardwoods. It and the adjacent Tionesta Scenic Area form one of the largest tracts of old-growth forest east of the Mississippi River.
  • The forest has had its share of disturbances--deer overbrowsing, encroachment from oil and natural-gas drilling, and the destructive May 1985 tornado. The hemlock woolly adelgid has not yet been detected here; however, beech bark disease has killed many trees.
  • "Despite the disturbances, the forest is magnificent. It was late in the day when I visited, and I had time to explore only a small portion of the forest. Will make a return trip."
Petsa Kinuha noong 11 Hunyo 2011, 19:28:04
Pinanggalingan Flickr: Old-Growth Forest (1)
May-akda Nicholas
Camera location41° 37′ 37.69″ N, 78° 56′ 28.04″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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