| Abstract: | We studied the ages and diameter growth rates of trees in former Douglas-fir (Pseudotsuga menziesii (Mirb.)Franco) old-growth stands on 10 sites and compared them with young-growth stands (50-70 years old, regenerated after timber harvest) in the Coast Range of western Oregon. The diameters and diameter growth rates for the first 100 years of trees
in the old-growth stands were significantly greater than those in the young-growth stands. Growth rates in the old stands were comparable with those from long-term studies of young stands in which density is about 100-120 trees/ha; often young-growth stand density is well over 500 trees/ha. Ages of large trees in the old stands ranged from 100 to 420 years; ages
in young stands varied by only about 5 to 10 years. Apparently, regeneration of old-growth stands on these sites occurred over a prolonged period, and trees grew at low density with little self-thinning; in contrast, after timber harvest, young stands may develop with high density of trees with similar ages and considerable self-thinning. The results suggest that thinning may be needed in dense young stands where the management objective is to speed development of old-growth characteristics. |
| Genre: | Article |
| ProdID: | 1015852 |
| Citation Author: | Tappeiner, J. C., II; Huffman, D.; Spies, T.; Spies, T.; Bailey, John D. |
| Citation Contributing Office: | Forest and Rangeland Ecosystem Science Center |
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| Citation End Page: | 648 |
| Citation Issue: | 5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Canadian Journal of Forest Research |
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| Citation Month: | MAY |
| Citation No Pagination: | |
| Citation Number Of Pages: | 11 |
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| Citation Phsyical Description: | p. 638-648 |
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| Citation Search Results Text: | Density, ages, and growth rates in old-growth and young-growth forests in coastal Oregon; 1997; Article; Journal; Canadian Journal of Forest Research; Tappeiner, J. C., II; Huffman, D.; Spies, T.; Spies, T.; Bailey, John D. |
| Citation Start Page: | 638 |
| Citation Volume: | 27 |
| Citation Year: | 1997 |
| Type: | citation/reference |
| Text: | Density, ages, and growth rates in old-growth and young-growth forests in coastal Oregon; 1997; Article; Journal; Canadian Journal of Forest Research; Tappeiner, J. C., II; Huffman, D.; Spies, T.; Spies, T.; Bailey, John D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1997 00:00 -0600 |
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