Ten-year development of Douglas-fir and associated vegetation after different site preparation on coast range clearcuts.

Stein, William I.

doi:10.2737/pnw-rp-473

Cited by 23 publications

(32 citation statements)

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“…prior to stem exclusion) and that this would be a dominant pattern in the models. For example, in the Oregon Coast Range, vegetative growth and replacement of Rubus spectabilis typically allows this species to maintain a dense canopy that can substantially inhibit regeneration of trees and taller shrubs (Tappeiner et al, 1991;Stein, 1995;Knowe et al, 1997). Once persistent cover of R. spectabilis is established, succession to other tree or shrub communities could be unlikely without major disturbance or management intervention.…”

Section: Discussionmentioning

confidence: 99%

Evaluation and prediction of shrub cover in coastal Oregon forests (USA)

Kerns¹,

Ohmann²

2004

Ecological Indicators

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Section: Discussionmentioning

confidence: 99%

Evaluation and prediction of shrub cover in coastal Oregon forests (USA)

Kerns¹,

Ohmann²

2004

Ecological Indicators

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“…Summed cover for woody species in the check treatment increased from 7.5% to 13.4% to 71.3% in years one through three of the study at Summit and from 41.7% to 68.2% to 119.2% at Marcola [25]. We suspect that woody species capable of doing so did not start to reach dominance until years 4 to 5, which is a commonly observed successional trend [10,26,27]. A temporal shift in dominance from herbaceous to woody species would explain the observed increase in volume at year 8 resulting from the woody-only control at Summit absent in year 3.…”

Section: Response To Herbaceous Versus Woody Competitionmentioning

confidence: 99%

“…Without fencing at this site, response to control of the woody component would have likely been lessened as deer would have reduced the level of cherry in-growth in untreated plots and cover of other potentially dominant tree species was negligible. Bigleaf maple (Acer macrophyllum Pursh) and especially red alder are tree species with widespread occurrence in the Oregon Coast Range with high dominance potential [6,13,27]. Had we chosen study sites where either of these species was a significant component of the plant community, response to control of the woody vegetation component would likely have been strong.…”

Section: Response To Herbaceous Versus Woody Competitionmentioning

confidence: 99%

“…By year 10, tree cover was the most competitive component of the vegetation community. Stein [27] examined species composition response to six site preparation treatments across five sites in the Oregon Coast range, and observed a shift from herbaceous species as the dominant component of weed cover years 1 through 3 post-treatment, to increasing woody dominance, primarily red alder (Alnus rubra Bong. ), beginning in year 5.…”

Section: Response To Herbaceous Versus Woody Competitionmentioning

confidence: 99%

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Eighth-year response of Douglas-fir seedlings to area of weed control and herbaceous versus woody weed control

Rose

Rosner

2005

Ann. For. Sci.

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-Coastal Douglas-fir growth response to eight experimental weed control treatments has been followed for eight years since planting at two western Oregon sites. Treatments included six areas of weed control around individual trees -0.0m 2 , 0.375 m 2 , 1.49 m 2 , 3.35 m 2 , 5.95 m 2 , and 9.63 m 2 (total vegetation control [TVC]) -control of herbaceous competition only or control of woody competition only. Herbaceous vegetation control treatments were maintained for the first two years after planting, while woody vegetation control treatments were maintained for three years. The greatest gain in Douglas-fir growth from increasing the area of control was observed between the 0.0 m 2 and the 0.375 m 2 treatments. Growth continued to increase, however, with increasing area of control out to complete weed control. The 5.95 m 2 and 9.63 m 2 treatments increased eighth-year individual-tree volume relative to the check treatment by 260% (20.9 dm 3 ) and 307% (24.7 dm 3 ), respectively. While herbaceous control increased growth at both sites, woody control affected growth only at the site having the hardwood component with greater height growth potential. Growth differences among treatments eight years after planting are discussed in terms of distance to competition and shifting dominance from herbaceous to woody vegetation over time.vegetation management / herbaceous competition / woody competition / area of weed control / herbicides Résumé -Impact de la surface désherbée et d'un contrôle de la végétation herbacée ou de la végétation ligneuse sur la croissance de jeunes sapins de Douglas âgés de huit ans. La réponse en termes de croissance de plants de Douglas verts huit ans après plusieurs modalités de contrôle de la végétation adventice a été étudiée dans deux sites de l'ouest de l'Oregon. Les traitements comprennent 6 surfaces de contrôle des mauvaises herbes autour d'arbres individuels -0,0 m 2 , 0,375 m 2 , 1,49 m 2 , 3,35 m 2 , 5,95 m 2 et 9,63 m 2 (contrôle total de la végétation (TVC)) -contrôle de la compétition herbacée seulement ou contrôle de la végétation ligneuse. Les traitements de contrôle de la végétation herbacée ont été maintenus les 2 premières années après plantation tandis que les traitements de contrôle de la végétation ligneuse ont été maintenus 3 ans. Le plus grand gain de croissance du Douglas avec l'augmentation de la surface de contrôle a été observé entre le traitement 0,0 m 2 et 3,75 m 2 . Toutefois la croissance continue à augmenter avec l'accroissement de la surface de contrôle en dehors d'un contrôle total des mauvaises herbes. Les traitements 5,95 m 2 et 9,63 m 2 présentent après 8 années un accroissement relatif de volume individuel d'un arbre de 260 % (20,9 dm 2 ) et 307 % (24,7 dm 2 ). Alors que le contrôle de la végétation herbacée augmente la croissance dans les deux sites d'étude, le contrôle de la végétation ligneuse influence la croissance uniquement dans le site qui a une composante d'espèces de feuillus ayant un fort potentiel de croissance en hauteur. Les différence...

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“…Consequently, extensive research (Stein 1995, Stewart 1978, Stewart and others 1984, Walstad and Kuch 1987 has addressed effects of such competition and methods for controlling it when needed. Control of grasses, forbs, and shrubs often is used to ensure favorable light conditions and adequate soil moisture for seedling survival and growth.…”

mentioning

confidence: 99%

Silviculture for multiple objectives in the Douglas-fir region.

Curtis¹,

DeBell²,

Harrington³

et al. 1998

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Silvicultural knowledge and practice have been evolving in the Pacific Northwest for nearly a century. Most research and management activities to date have focused on two major topics: (1) methods to regenerate older, naturally established forests after fire or timber harvest; and (2) growth and management of young stands. Today forest managers can reliably regenerate the major conifer and hardwood species under most conditions by using combinations of natural and artificial regeneration. They also can control stand density and species composition and growth of individual trees, thereby influencing stand structure. Available growth models can reasonably predict the outcome of growing conifer stands under a range of densities, species composition, and management scenarios, providing tree numbers by size class as well as crown characteristics and wood yields.Most silvicultural efforts have been financed through and directed toward production of wood. Although some other values have been produced or improved in conjunction with such activities, public interest and emphasis on nontimber values have increased. It has become apparent that some values are not benefitted by silvicultural practices aimed solely at wood production. In most situations, however, desired nontimber values can be enhanced by silvicultural measures implemented for their direct benefit or by some modifications of practices applied primarily to produce wood. We discuss the historical development of silviculture in the Pacific Northwest and review the silvicultural practices currently available to forest managers. We then point out how these practices can be modified and used to maintain and produce wildlife habitat, diverse stand structures (including those usually associated with old forests) and pleasing scenery, while also producing wood products. Most of the silvicultural knowledge needed to design and implement regimes for integrated production of these multiple values already exists.Keywords: Ecosystem management, multiple use, silvicultural systems, wildlife habitat, thinning, landscape management, forest ecology, Douglas-fir. Contents Regeneration Methods Natural RegenerationDirect Seeding and Planting Shaping Development of Young Natural Stands and Plantations Social Expectations and Silvicultural OpportunitiesEarly Density Control The above quotation, from the preface to the first edition of Foundations of Silviculture Upon an Ecological Basis (Tourney 1928), emphasizes the fact that silvicultural practice and the research in silviculture and the ecological relations that underpin it antedate the settlement of much of North America. The early foresters in the Pacific Northwest (and elsewhere in the United States) began with forest management concepts imported from Europe. These concepts were in part unsuited to the economic and social conditions existing in the United States at that time (ca. 1900), and to species and climatic conditions that differed somewhat from those of Europe. But this introduction of forestry concepts began a con...

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Ten-year development of Douglas-fir and associated vegetation after different site preparation on coast range clearcuts.

Cited by 23 publications

References 0 publications

Evaluation and prediction of shrub cover in coastal Oregon forests (USA)

Evaluation and prediction of shrub cover in coastal Oregon forests (USA)

Eighth-year response of Douglas-fir seedlings to area of weed control and herbaceous versus woody weed control

Silviculture for multiple objectives in the Douglas-fir region.

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