The mighty oak faces challenges in the Pacific West /
"Oaks in the Pacific West are facing four serious challenges that may trigger major changes in oak ecosystems. In Washington, Oregon, and northern California, fire exclusion has enabled Douglas-fir to encroach on the sun-loving Oregon white oak. In California, sudden oak death is taking a toll...
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| Format: | Government Document Book |
| Language: | English |
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Portland, Or. :
U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station,
[2010]
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| Series: | Science update (Portland, Or.) ;
issue 20. |
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| Online Access: | http://www.fs.fed.us/pnw/pubs/science-update-20.pdf |
| Summary: | "Oaks in the Pacific West are facing four serious challenges that may trigger major changes in oak ecosystems. In Washington, Oregon, and northern California, fire exclusion has enabled Douglas-fir to encroach on the sun-loving Oregon white oak. In California, sudden oak death is taking a toll on tanoaks, black oaks, and coast live oaks, and in central California, blue oak and valley oak are not regenerating fast enough to replace older trees. The goldspotted oak borer, first detected in 2004, is playing a major role in oak mortality in southern California. All along the west coast, conversion of oak woodlands and savannas to agricultural and residential uses has dramatically reduced oak coverage since settlement by Euro-Americans. Scientists with the Pacific Northwest and Pacific Southwest Research Stations are studying these various threats and developing practical strategies for addressing them. Most oak woodlands along the west coast are privately owned, making it imperative to broadly share information that may help preserve and restore these valued ecosystems."--Summary. |
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| Item Description: | Caption title. "Fall, 2010." |
| Physical Description: | 11 pages : color illustrations ; 28 cm. Also available on the World Wide Web. |
| Bibliography: | Includes bibliographical references (pages 11-[12]). |