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      Biosphere Reserve Information

United States of America


  General Description   H. J. Andrews Biosphere Reserve and Experimental Forest is located in the western Cascade Range (Oregon) in the drainage basin of Lookout Creek, a tributary of the Blue River and the McKenzie River.
Forests in this region are among the tallest and most productive in the world. Lower elevation forests are dominated by Douglas-fir (Pseudotsuga menziesii), western hemlock (Tsuga heterophylla), and western redcedar (Thuja plicata). As elevation increases, Douglas-fir and western red cedar decline in importance and western hemlock is gradually replaced by Pacific silver fir (Abies amabilis). Non-forest habitats include wet and dry meadows, rock cliffs, and talus slopes. H. J.Andrews Forest supports a rich biological diversity for a north temperate ecosystem including many plant and animal species associated with old-growth forests of the Pacific Northwest (e.g. northern spotted owl, Strix occidentalis).
The biosphere reserve is dedicated to both research and education, receiving a number of scientists and visitors each year. The research programmes have been diverse throughout the history of the H. J. Andrews Forest. Emphasis was given to applied research in silviculture, wildlife, landscape ecology under the Long-term Ecological Research (LTER) programme in the 1980s. Today, the central research question is of high scientific, social and economic interest: How do land use, natural disturbances, and climate change affect three key ecosystem properties (carbon dynamics, biodiversity, and hydrology)?
  Major ecosystem type   Mixed mountain and highland systems (conifer-dominated)
  Major habitats & land cover types   Douglas-fir/western hemlock/western red cedar forests
  Location   4415'N, 12210'W
  Area (hectares)    
  Total   6,400
  Core area(s)  
  Buffer zone(s)  
  Transition area(s) when given  
  Altitude (metres above sea level)   +435 to +1,631
  Year designated   1976
  Administrative authorities   H.J. Andrews Experimental Forest, U.S. Department of Agriculture, Forest Service in cooperation with Oregon State University

Last updated: 09/01/2002

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