Index Catalog // ScholarsArchive@OSU

Integrating functional trait frameworks into restoration : the role of seed and seedling traits in recruitment success

Creator:: Larson, Julie E.
Abstract:: Seeding is a vital tool to facilitate recovery of degraded ecosystems, but low seedling recruitment rates limit the utility of this practice in a range of ecosystems across the globe. Plant functional traits impact individual fitness through effects on growth, reproduction and survival. Consequently, seed and seedling trait variation among...
Resource Type:: Masters Thesis

Influence of cattle grazing and forage seeding on establishment of conifers in southwest Oregon

Creator:: Alejandro-Castro, Mabel
Abstract:: The ability of controlled livestock grazing, in combination with seeding of palatable forages, to reduce understory competition and enhance conifer establishment, was evaluated during 1985 and 1986, on two adjacent sites in southwestern Oregon. In 1984, Site 1 was clearcut and broadcast burned to remove slash, and Site 2 was...
Resource Type:: Masters Thesis

Evaluation of native and introduced plant species for revegetating Central Tunisian rangelands

Creator:: Chouki, Salah
Abstract:: The evaluations performed in this thesis were intended to provide a partial basis for the selection of species and varieties for reseeding Central Tunisian rangelands. The first evaluation determined the effects of four moisture regimes and two growth mediums on seedling emergence and early root and shoot development of eight...
Resource Type:: Masters Thesis

Effects of prescribed cattle grazing on reforestation in Oregon's southern Cascades

Creator:: Karl, Michael G.
Abstract:: Reforesting harvested lands in southwestern Oregon has been difficult because of low rainfall, high evaporative demand, and competitive understory vegetation. Herbicides have been a preferred method to control competing vegetation but herbicide use on federal lands was curtailed in 1984. As a result, interest in livestock grazing as a vegetation...
Resource Type:: Dissertation

Effect of temperature and competition on shoot and root growth of cheatgrass (Bromus tectorum L.) and 5 collections of Idaho fescue (Festua idahoensis. Elmer)

Creator:: Nasri, Mohamed
Abstract:: This research was conducted to determine the effects of temperature and competition on seedling root and shoot growth of cheatgrass (Bromus tectorum L.) and 5 collections of Idaho fescue (Festuca idahoensis. Elmer). For the temperature study, seedlings were grown in environmental chambers with 16 hours day/8 hours night, at temperatures...
Resource Type:: Masters Thesis

Response of Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis) to defoliation of understory grasses and drought

Creator:: Purrington, Teal Mackenzie
Abstract:: Water potential, leaf conductance, growth, nitrogen content, and seedling survival of Wyoming Big Sagebrush (Artemisia tridentata ssp. wyomingensis) following defoliation of the herbaceous understory were assessed during two growing seasons. Precipitation was 107% and 63% of the long-term mean (283 mm) in 1989 and 1990, respectively, which presented an opportunity...
Resource Type:: Masters Thesis

Ecotypic variation, adaptation, and persistence of Idaho fescue on degraded central Oregon rangelands

Creator:: Goodwin, Jay Rodney
Resource Type:: Masters Thesis

Similarities in understory vegetation composition between unthinned, thinned and old-growth Douglas fir stands in western Oregon

Creator:: Mayrsohn, Cheryl
Abstract:: Forest stands were studied to determine if old-growth forest structure could be mimicked in younger stands via overstory manipulation. Cover and species composition of understory plants were systematically sampled in sixteen thinned second-growth stands and sixteen adjacent unthinned second-growth Douglas fir (Pseudotsuga menziesii (Mirabel) Franco.) stands. The stands were thinned...
Resource Type:: Masters Thesis

Community structure of old-growth Juniperus occidentalis woodlands

Creator:: Waichler, Wendy Sims
Abstract:: Knowledge of old-growth Juniperus occidentalis woodlands, which occur in central and eastern Oregon, is limited. Wise management of these woodlands necessitates a better understanding of the community ecology. The community structure of woodlands at seven sites in three areas of central Oregon was studied. Measurements taken at nine plots per...
Resource Type:: Masters Thesis

Relative competitive abilities of several common forest species and planted Douglas-fir in western Oregon

Creator:: Naylor-Murphy, Lanea
Abstract:: In terms of production forestry, more often than not any species that is not the crop species is considered a competitor as they are using finite growing resources that would otherwise be available to the crop species. With specific regard to Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) production in the Pacific...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Integrating functional trait frameworks into restoration : the role of seed and seedling traits in recruitment success

Influence of cattle grazing and forage seeding on establishment of conifers in southwest Oregon

Evaluation of native and introduced plant species for revegetating Central Tunisian rangelands

Effects of prescribed cattle grazing on reforestation in Oregon's southern Cascades

Effect of temperature and competition on shoot and root growth of cheatgrass (Bromus tectorum L.) and 5 collections of Idaho fescue (Festua idahoensis. Elmer)

Response of Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis) to defoliation of understory grasses and drought

Ecotypic variation, adaptation, and persistence of Idaho fescue on degraded central Oregon rangelands

Similarities in understory vegetation composition between unthinned, thinned and old-growth Douglas fir stands in western Oregon

Community structure of old-growth Juniperus occidentalis woodlands

Relative competitive abilities of several common forest species and planted Douglas-fir in western Oregon

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