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Understanding the role of vegetation succession in forest ecosystems of the Pacific Northwest is a fundamental part of long-term ecological research at H.J. Andrews Experimental Forest. Studies in this component seek to understand how plant communities change in composition and structure over the course of succession and what processes control these changes. We are particularly interested in how changes in vegetation over the course of succession affect other ecosystem processes such as vegetation water-use, carbon storage, nitrogen cycling, and disturbance regimes. The research for this component primarily makes use of data from a large network of permanent study plots across a wide range of stand ages, habitats, management histories, and disturbance types in Oregon and Washington and data from long-term monitoring of experimental watersheds at the H.J. Andrews Experimental Forest. The long-term data from the permanent study plot program provides the only means of directly observing the relatively slow dynamics of Pacific Northwest forests. Mature, old-growth at HJA Reference Stand 12

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Key Databases

List of all Vegetation databases

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