Index Catalog // ScholarsArchive@OSU

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

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

Enlargement of canopy gaps associated with a fungal pathogen in Yosemite Valley, California

Creator:: Rizzo, D. M., Slaughter, G. W., and Parmeter, J. R.
Abstract:: The enlargement of 21 canopy gaps associated with the root pathogen Heterobasidion annosum (Fr.:Fr.) Bref. (; Fomes annosus (Fr.) Karst.) in the mixed-conifer forest of Yosemite Valley was monitored between 1971 and 1998. Mean expanded gap area was 232 m2 (range 38–802 m2) in 1971 and 1455 m2 (range 150–4216...
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Full Text:: . Parmeter, Jr. (Emeritus).Department of Environmental Science, Policy and Management, University of

Strobilus production and growth of Pacific yew under a range of overstory conditions in western Oregon

Creator:: DeFazio, S. P., Vance, N. C., and Wilson, M. V.
Abstract:: Strobilus production, growth, and morphology of Pacific yew (Taxus brevifolia Nutt.) were examined at three sites in the Cascade Mountains and one site in the Willamette Valley of western Oregon. Strobilus production on branch segments was positively associated with overstory openness for male and female trees at all four sites...
Resource Type:: Article
Full Text:: Strobilus production and growth of Pacific yew under a range of

Leaf litter chemistry controls on decomposition of Pacific Northwest trees and woody shrubs

Creator:: Valachovic, Y. S., Caldwell, B. A., Cromack Jr., K., and Griffiths, Robert P.
Abstract:: The effects of initial leaf litter chemistry on first-year decomposition rates were studied for 16 common Pacific Northwest conifers, hardwoods, and shrubs at the H.J. Andrews Experimental Forest in western Oregon. Leaf litters were analyzed for C, N, P, K, Ca, Mg, proximate organic fractions (nonpolar, polar, acid-hydrolyzable extractives, acid-hydrolyzable...
Resource Type:: Article
Full Text:: of Pacific Northwest trees and woody shrubs1 Y.S. Valachovic, B.A. Caldwell, K. Cromack Jr., and R.P

Fine-root decomposition and N dynamics in coniferous forests of the Pacific Northwest, U.S.A.

Creator:: Chen, Hua, Harmon, Mark E., Sexton, Jay, and Fasth, Becky
Abstract:: We examined the effects of species, initial substrate quality, and site differences (including temperature, precipitation, and soil N availability) on fine-root (<2 mm diameter) decomposition in litter bags and its N dynamics in Sitka spruce (Picea sitchensis (Bong) Carrière), Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), and ponderosa pine (Pinus ponderosa Dougl....
Resource Type:: Article
Full Text:: coniferous forests of the Pacific Northwest, U.S.A. Hua Chen, Mark E. Harmon, Jay Sexton, and Becky Fasth

Interaction of vegetation control and fertilization on conifer species across the Pacific Northwest

Creator:: Rose, Robin and Ketchum, J. Scott
Abstract:: An experiment evaluating three levels of vegetation competition control (no control, 1.5 m2 of vegetation control, and 3.3 m2 of vegetation control), each with two fertilization treatments (fertilization at the time of planting with complete slow-release fertilizer (Woodace® IBDU), or no fertilization), was installed at five sites. Two of these...
Resource Type:: Article
Full Text:: fertilization on conifer species across the Pacific Northwest1 Robin Rose and J. Scott Ketchum Abstract: An

Decomposition and nitrogen release from decomposing woody roots in coniferous forests of the Pacific Northwest: a chronosequence approach

Creator:: Chen, Hua, Harmon, Mark E., and Griffiths, Robert P.
Abstract:: Decomposition of woody roots in Sitka spruce (Picea sitchensis (Bong.) Carrière), Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), and ponderosa pine (Pinus ponderosa P. Laws. ex C. Laws.) dominated forests in Oregon, U.S.A. was studied using a chronosequence. Roots of five coniferous species were excavated from stumps with ages up to 46...
Resource Type:: Article
Full Text:: woody roots in coniferous forests of the Pacific Northwest: a chronosequence approach Hua Chen, Mark E

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:: Douglas-fir – western hemlock forests in the Pacific Northwest, U.S.A.: results from a simulation model

Cesium radioisotope content of wild edible fungi, mineral soil, and surface litter in western North America after the Fukushima nuclear accident

Creator:: Trappe, Matthew J., Minc, Leah D., Kittredge, Kimberly S., and Pink, Jeremias W.
Abstract:: We measured activity levels of cesium radioisotopes ¹³⁴Cs and ¹³⁷Cs in wild edible fungi, mineral soil, and surface litter of the west coast of North America from southern California to northern Vancouver Island after the Fukushima nuclear accident. All activity measurements were below governmental limits for human health. ¹³⁷Cs activity...
Resource Type:: Article
Full Text:: Japan, 79% in the Pacific Ocean, and 2% 36 on land areas other than Japan (Stohl et al. 2012). 37

ScholarsArchive@OSU

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

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

Enlargement of canopy gaps associated with a fungal pathogen in Yosemite Valley, California

Strobilus production and growth of Pacific yew under a range of overstory conditions in western Oregon

Leaf litter chemistry controls on decomposition of Pacific Northwest trees and woody shrubs

Fine-root decomposition and N dynamics in coniferous forests of the Pacific Northwest, U.S.A.

Interaction of vegetation control and fertilization on conifer species across the Pacific Northwest

Decomposition and nitrogen release from decomposing woody roots in coniferous forests of the Pacific Northwest: a chronosequence approach

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

Cesium radioisotope content of wild edible fungi, mineral soil, and surface litter in western North America after the Fukushima nuclear accident

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