Index Catalog // ScholarsArchive@OSU

The influence of antidesiccants on field performance and physiology of 2+0 ponderosa pine (Pinus ponderosa Dougl.) seedlings

Creator:: Vera-Castillo, J. A. Gil
Abstract:: This thesis research examines the effects of film-forming antidesiccants applied to dormant pondexosa pine (Pinus ponderosa Dougl.) seedlings after being lifted and to actively growing seedlings. The basic proposition was that antidesiccants would have a positive effect on reducing water loss in ponderosa pine seedlings. In order to evaluate the...
Resource Type:: Dissertation

Physiological and morphological responses to water deficit in seedling progeny of four populations of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco)

Creator:: Joly, Robert J.
Abstract:: The relationships among total water potential (psi), osmotic potential ([pi]), pressure potential (P), and relative water content (R*) were determined during four consecutive soil drying cycles for shoots of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) seedlings. In each cycle, seedlings were sampled for pressure-volume determinations as soil water was depleted gradually...
Resource Type:: Dissertation

Hydraulic properties of compression wood in branches and reoriented shoots of Douglas-fir (Psuedotsuga menziesii)

Creator:: Spicer, Rachel
Abstract:: Xylem anatomy is a strong determinant of water transport efficiency and is therefore an important component of the overall hydraulic strategy of any woody plant. However, in addition to its role in water transport, xylem also serves in mechanical support, and these two functions may represent conflicting design requirements. To...
Resource Type:: Masters Thesis

Water movement in the stem xylem in relation to xylem specific conductivity in four hardwood species

Creator:: Fallas-Cedeño, Lottie
Abstract:: In deciduous species, water exits stems mainly through leaf traces attached to the outer growth ring and yet we know that water ascends throughout the entire cross-section of the sapwood. There is an increasing amount of information on sap flow and sapwood hydraulic properties from separate studies, but little information...
Resource Type:: Masters Thesis

The effects of water and shade treatments on photosynthesis and root-rhizosphere respiration in young ponderosa pine

Creator:: Johnson, Theresa J.
Abstract:: Water treatments were applied to young ponderosa pine trees in the Eastern Cascades, Oregon during the 2003 growing season, and shade treatments were applied during the 2003 and 2004 growing seasons to understand how photosynthesis and soil respiration, particularly the root/rhizosphere fraction (R[subscript rrh]), would respond to increased moisture availability...
Resource Type:: Masters Thesis

Patterns of soil organic matter and microclimate accompanying the death and regeneration of a mountain hemlock (Tsuga mertensiana ) forest

Creator:: Boone, Richard D.
Abstract:: Soil organic matter levels, soil temperature and moisture, and vegetation properties were measured along a sequence of death and regeneration in a mountain hemlock (Tsuga mertensiana) forest. The sequence is produced by slowly moving waves of the root pathogen Phellinus weirii. While analysis of variance for all sampled soil layers...
Resource Type:: Masters Thesis
Full Text:: 12 Stand and ground cover biomass 14 Temperature 14 Particle size analysis 18 Water release curve 18

Meta-sedimentary bedrock as an alternative source of water for forest ecosystems in a Mediterranean climate

Creator:: Zwieniecki, Maciej A.
Abstract:: Evaluation of meta-sedimentary bedrock as a source of stored water available to plants in a mediterranean climate is presented based on: root length distribution (RLD), root morphology, rock water holding capacity and seasonal pattern of water depletion. Studies were performed in southwestern Oregon under young stands of whiteleaf manzanita, ponderosa...
Resource Type:: Dissertation

Ecology of Craterellus tubaeformis in western Oregon

Creator:: Trappe, Matthew James
Abstract:: Craterellus tubaeformis is a small to medium-sized forest mushroom that is fairly common in the Douglas-fir/western hemlock forests of the Pacific Northwestern United States and is most often associated with decayed coarse woody debris. In this study, the mycorrhizae of Craterellus tubaeformis in western Oregon is identified by DNA analysis...
Resource Type:: Masters Thesis
Full Text:: .......................................................... 35 Relationship with Hydnum species

Height-related trends in structure and function of Douglas-fir foliage

Creator:: Woodruff, David R.
Abstract:: This dissertation investigated the impacts of tree height upon a range of physiological and structural characteristics of Douglas-fir foliage; relationships between structural and functional trends with height; and compensatory mechanisms that mitigate height-related growth constraints. Height-related trends in foliar physiological and anatomical characteristics were examined both within trees as well...
Resource Type:: Dissertation
Full Text:: height growth in Douglas-fir. Tree Physiology 17: 441- 453. Boyer J.S. (1968) Relationship of water

The spatial distribution of beaver (Castor canadensis) impoundments and effects on plant community structure in the lower Alsea drainage of the Oregon Coast Range

Creator:: Perkins, Thaïs Erbel
Abstract:: Stream systems in the Pacific Northwest have come to be understood in the absence of beaver (Castor canadensis). To understand the effect of beaver upon riparian plant communities, four basins in the lower Alsea drainage were examined to determine the effect of beaver and their impoundments on streamside herbaceous/shrub and...
Resource Type:: Masters Thesis
Full Text:: . Impact on Plant Community Structure Beaver influence plant communities by impounding water and browsing

ScholarsArchive@OSU

The influence of antidesiccants on field performance and physiology of 2+0 ponderosa pine (Pinus ponderosa Dougl.) seedlings

Physiological and morphological responses to water deficit in seedling progeny of four populations of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco)

Hydraulic properties of compression wood in branches and reoriented shoots of Douglas-fir (Psuedotsuga menziesii)

Water movement in the stem xylem in relation to xylem specific conductivity in four hardwood species

The effects of water and shade treatments on photosynthesis and root-rhizosphere respiration in young ponderosa pine

Patterns of soil organic matter and microclimate accompanying the death and regeneration of a mountain hemlock (Tsuga mertensiana ) forest

Meta-sedimentary bedrock as an alternative source of water for forest ecosystems in a Mediterranean climate

Ecology of Craterellus tubaeformis in western Oregon

Height-related trends in structure and function of Douglas-fir foliage

The spatial distribution of beaver (Castor canadensis) impoundments and effects on plant community structure in the lower Alsea drainage of the Oregon Coast Range

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