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Is long primary growth associated with stem sinuosity in Douglas-fir?

Creator:: Gartner, Barbara L. and Johnson, G. R.
Abstract:: Stem sinuosity is a highly visible stem-form trait in the leaders of fast-growing Douglas-fir (Pseudotsuga menziesii var. (Mirb.) Franco) trees, yet its cause is unknown. We tested the hypotheses that sinuous stems have longer expanses of primary growth than nonsinuous stems (putting the leader at higher risk curvature, induction of...
Resource Type:: Article
Full Text:: in Douglas-fir? Barbara L. Gartner and G.R. Johnson Abstract: Stem sinuosity is a highly visible

Relationships of density, microfibril angle, and sound velocity with stiffness and strength in mature wood of Douglas-fir

Creator:: Lachenbruch, Barbara, Johnson, G. R., Downes, G., and Evans, R.
Abstract:: The relative importance of density, acoustic velocity, and microfibril angle (MFA) for the prediction of the stiffness (MOE) and strength (MOR) has not been well established for Douglas-fir (Pseudotsuga menziesii). MOE and MOR of small clear specimens of mature wood were better predicted by density and velocity than by either...
Resource Type:: Article
Full Text:: variables Age (years) MOEd (MPa) MORd (MPa) Densityd (g/cm3) Velocityd (m/s) Densityss (g/cm3) MFAss

Effects of silvicultural practices on carbon stores in Douglas-fir – western hemlock forests in the Pacific Northwest, U.S.A.: results from a simulation model

Creator:: Harmon, Mark E. and Marks, Barbara
Abstract:: We used a new model, STANDCARB, to examine effects of various treatments on carbon (C) pools in the Pacific Northwest forest sector. Simulation experiments, with five replicates of each treatment, were used to investigate the effects of initial conditions, tree establishment rates, rotation length, tree utilization level, and slash burning...
Resource Type:: Article
Full Text:: Mark E. Harmon and Barbara Marks Abstract: We used a new model, STANDCARB, to examine effects of

Impact of the foliar pathogen Swiss needle cast on wood quality of Douglas-fir

Creator:: Johnson, G. R., Grotta, Amy T., Gartner, Barbara L., and Downes, Geoff
Abstract:: Many stands of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) near coastal areas of Oregon and Washington are heavily infected with the foliar pathogen causing Swiss needle cast (SNC) disease, and yet there is very little research on the resulting wood quality. Modulus of elasticity (MOE), modulus of rupture (MOR), microfibril angle...
Resource Type:: Article
Full Text:: on wood quality of Douglas-fir G.R. Johnson, Amy T. Grotta, Barbara L. Gartner, and Geoff Downes

The role of epiphytes in rainfall interception by forests in the Pacific Northwest. I. Laboratory measurements of water shortage

Creator:: Pypker, Thomas G., Unsworth, Michael H., and Bond, Barbara J.
Abstract:: Old-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forests frequently contain large populations of epiphytic lichens and bryophytes. To determine the effect these epiphytes have on canopy hydrology we measured the maximum water fraction (f(x)max; maximum mass of internal and external water stored by an epiphyte divided by its tissue dry mass)...
Resource Type:: Article
Full Text:: forests in the Pacific Northwest. I. Laboratory measurements of water storage Thomas G. Pypker, Michael H

Effects of live crown on vertical patterns of wood density and growth in Douglas-fir

Creator:: Gartner, Barbara L., North, Eric M., Johnson, G. R., and Singleton, Ryan
Abstract:: It would be valuable economically to know what are the biological triggers for formation of mature wood (currently of high value) and (or) what maintains production of juvenile wood (currently of low value), to develop silvicultural regimes that control the relative production of the two types of wood. Foresters commonly...
Resource Type:: Article
Full Text:: density and growth in Douglas-fir Barbara L. Gartner, Eric M. North, G.R. Johnson, and Ryan Singleton

The role of epiphytes in rainfall interception by forests in the Pacific Northwest. II. Field measurements at the branch and canopy scale

Creator:: Pypker, Thomas G., Unsworth, Michael H., and Bond, Barbara J.
Abstract:: To determine how epiphytes affect the canopy hydrology of old-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forests, we measured rainfall interception by individual branches and an entire stand from March 2003 to May 2004. Epiphyte-laden branches at heights of 3.1, 24.8 and 46.5 m remained partially saturated for most of the...
Resource Type:: Article
Full Text:: forests in the Pacific Northwest. II. Field measurements at the branch and canopy scale Thomas G. Pypker

Wood density of young-growth western hemlock: relation to ring age, radial growth, stand density, and site quality

Creator:: DeBell, Dean S., Singleton, Ryan, Gartner, Barbara L., and Marshall, David D.
Abstract:: Breast-high stem sections were sampled from 56 western hemlock (Tsuga heterophylla (Raf.) Sarg.) trees growing in 15 plots representing a wide range of tree and site conditions in northwestern Oregon. Growth and wood density traits of individual rings were measured via X-ray densitometry, and relationships of ring density and its...
Resource Type:: Article
Full Text:: , Barbara L. Gartner, and David D. Marshall Abstract: Breast-high stem sections were sampled from 56

Effects of release from suppression on wood functional characteristics in young Douglas-fir and western hemlock

Creator:: Renninger, Heidi J., Gartner, Barbara L., and Meinzer, Frederick C.
Abstract:: Little is known of wood properties in trees that were initially suppressed and subsequently released from suppression. The purpose of this study was to assess differences in growth ring width, specific conductivity (Ks), tracheid dimensions, moisture content, and wood density in suppressed Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) and western hemlock...
Resource Type:: Article
Full Text:: functional characteristics in young Douglas-fir and western hemlock Heidi J. Renninger, Barbara L. Gartner

Effect of growth rate on the anatomy, specific gravity, and bending properties of wood from 7-year-old red alder (Alnus rubra)

Creator:: Lei, Hua, Gartner, Barbara L., and Milota, Michael R.
Abstract:: Understanding the association between growth rate and wood properties is of practical importance to maximizing and sustaining wood and fiber production. Anatomical characteristics, specific gravity, and bending properties were determined at breast height for thirty 7-year-old trees with varying growth rates, from a red alder (Alnus rubra Bong.) plantation. Wood...
Resource Type:: Article
Full Text:: properties of wood from 7-year-old red alder (Alnus rubra)1 Hua Lei, Barbara L. Gartner, and Michael R

ScholarsArchive@OSU

Is long primary growth associated with stem sinuosity in Douglas-fir?

Relationships of density, microfibril angle, and sound velocity with stiffness and strength in mature wood of Douglas-fir

Effects of silvicultural practices on carbon stores in Douglas-fir – western hemlock forests in the Pacific Northwest, U.S.A.: results from a simulation model

Impact of the foliar pathogen Swiss needle cast on wood quality of Douglas-fir

The role of epiphytes in rainfall interception by forests in the Pacific Northwest. I. Laboratory measurements of water shortage

Effects of live crown on vertical patterns of wood density and growth in Douglas-fir

The role of epiphytes in rainfall interception by forests in the Pacific Northwest. II. Field measurements at the branch and canopy scale

Wood density of young-growth western hemlock: relation to ring age, radial growth, stand density, and site quality

Effects of release from suppression on wood functional characteristics in young Douglas-fir and western hemlock

Effect of growth rate on the anatomy, specific gravity, and bending properties of wood from 7-year-old red alder (Alnus rubra)

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