Development of a Mixed Shrub-tanoak-Douglas-fir Community in a Treated and Untreated Condition PDF Download
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Author: Philip M. McDonald
Publisher:
ISBN:
Category : Douglas-fir
Languages : en
Pages : 24
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Book Description
Author: Philip M. McDonald
Publisher:
ISBN:
Category : Douglas-fir
Languages : en
Pages : 24
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Book Description
Author: Deborah J. Chavez
Publisher:
ISBN:
Category : Forest reserves
Languages : en
Pages : 498
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Book Description
Author: Philip M. McDonald
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 24
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 420
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Book Description
Author: Frederica Bowcutt
Publisher: University of Washington Press
ISBN: 0295805935
Category : Nature
Languages : en
Pages : 240
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Book Description
Tanoak (Notholithocarpus densiflorus) is a resilient and common hardwood tree native to California and southwestern Oregon. People’s radically different perceptions of it have ranged from treasured food plant to cash crop to trash tree. Having studied the patterns of tanoak use and abuse for nearly twenty years, botanist Frederica Bowcutt uncovers a complex history of cultural, sociopolitical, and economic factors affecting the tree’s fate. Still valued by indigenous communities for its nutritious acorn nut, the tree has also been a source of raw resources for a variety of industries since white settlement of western North America. Despite ongoing protests, tanoaks are now commonly killed with herbicides in industrial forests in favor of more commercially valuable coast redwood and Douglas-fir. As one nontoxic alternative, many foresters and communities promote locally controlled, third-party certified sustainable hardwood production using tanoak, which doesn’t depend on clearcutting and herbicide use. Today tanoaks are experiencing massive die-offs due to sudden oak death, an introduced disease. Bowcutt examines the complex set of factors that set the stage for the tree’s current ecological crisis. The end of the book focuses on hopeful changes including reintroduction of low-intensity burning to reduce conifer competition for tanoaks, emerging disease resistance in some trees, and new partnerships among tanoak defenders, including botanists, foresters, Native Americans, and plant pathologists. Watch the book trailer: https://www.youtube.com/watch?v=xzY7QxOiI8I
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 88
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Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 10
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Book Description
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 1960
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Book Description
Author: Philip M. McDonald
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 28
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Book Description
Author: Philip M. McDonald
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 20
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Book Description
Douglas-fir seedlings on the Arcata Resource Area, Bureau of Land Management, U.S. Department of the Interior, in central coastal California, were released by chain sawing and grubbing competing vegetation around them at different frequencies (0, 2, and 3 grubbings) over a 5-year period. After 5 years, average Douglas-fir stem diameter (measured at 12 inches above mean groundline) of seedlings grubbed at ages 1,2, and 5 was 0.91 inches, and of seedlings grubbed after the first and fifth growing season was 0.95 inches. Both were significantly larger than counterparts in the control (0.57 inches). Tanoak, the most competitive species, constituted 84 percent of total plant cover in the control after 5 years, but only 25 percent on treated plots. Combined shrubs varied little between the untreated control and treated plots and averaged about 7 percent of total foliar cover. Grasses were not present in the control and only for the fifth year in treated plots. The most abundant forb, a hedge nettle, increased greatly in density in both control and treated plots. These relationships and others denoted in the paper yield valuable ecological information on species and community dynamics in both a natural and treated environment. Crew time (no overhead or travel costs) for the three grubbings was 52 hours and for the two grubbings was 44 hours.
