Index Catalog // ScholarsArchive@OSU

The roles of provenance and phylogeny in recruitment, community assembly, and species coexistence in invaded California grasslands

Creator:: Brandt, Angela J.
Abstract:: Biological invasions pose one of the greatest threats to global biodiversity, but many naturalized invaders coexist with the native community. Community ecology theory provides a framework for understanding the mechanisms by which invaders might coexist with native species or exclude them from the community, thus informing management practices to maximize...
Resource Type:: Dissertation
Full Text:: .......................................................................................... 2 2 Regional and decadal patterns of native and exotic plant coexistence in California grasslands

Variation of carbon allocation and competitive ability of different tree species as related to successional position and habitat

Creator:: Malavasi, Ubirajara Contro
Abstract:: Early and late seral tree species were compared for inter-and intraspecific competitive ability; within-population genetic variability; and allocation patterns of soluble sugars and starch seasonally and in response to shade and nitrogen fertilization. Species were Douglas-fir (early seral) and western hemlock (late seral) from a low elevation habitat; and noble...
Resource Type:: Dissertation

Evaluation of allelopathy as a mechanism by which buckwheat suppresses Canada thistle and its mycorrhizae

Creator:: Eskelsen, Steven R.
Abstract:: Experiments were conducted to determine if allelopathy is a mechanism by which buckwheat interferes with a) the growth of Canada thistle and/or b) mycorrhizae colonization in Canada thistle roots. In a competition experiment, buckwheat plant biomass was only affected by the intraspecific competition from other buckwheat plants and not by...
Resource Type:: Dissertation
Full Text:: Canada thistle roots. In a competition experiment, buckwheat plant biomass was only affected by the

Underplanting and competition in thinned Douglas-fir

Creator:: Brandeis, Thomas James
Abstract:: Understory conifer regeneration needs to occur beneath conifer-dominated canopies if two-storied or uneven-aged structures are to be considered for western Oregon Coast Range stand management. To ensure adequate numbers of seedlings to meet stocking or habitat structure objectives, planting may be a solution. We undertook a multi-level study to determine...
Resource Type:: Dissertation

Growth and carbon allocation of red alder seedlings grown over a density gradient

Creator:: Giordano, Peter A.
Abstract:: The amount and quality of competition among individuals in developing plant communities is an important factor determining community structure, composition and development. In perennial plant communities, this competition is reflected by shifts in carbon allocation among plant parts and can result in long-term structural differences between neighboring individuals. This study...
Resource Type:: Masters Thesis

Effect of density, proportion, and spatial arrangement on the competition of winter wheat and Italian ryegrass (Lolium multiflorum Lam)

Creator:: Hashem, Abul, 1956-
Resource Type:: Dissertation
Full Text:: computation 9 REVIEW OF LITERATURE 10 Nature of plant competition 10 Mechanism of competition 14 Competition

Interactive effects of stripe rust and plant competition in heterogeneous wheat populations

Creator:: Finckh, Maria Renate
Abstract:: Disease has been implied as an important selective force acting in plant populations. This study was conducted to determine the effects of stripe rust (Puccinia striiformis) on the population dynamics of wheat (Triticum aestivum) cultivar mixtures. Five wheat cultivars were grown in pure stands and all possible mixtures at three...
Resource Type:: Dissertation
Full Text:: Interactive effects of stripe rust and plant competition

Water use of cool season grasses and their effect on grapevine (Vitis vinifera) growth and development

Creator:: Doty, Jean A.
Abstract:: The use of grass cover crops is a recommended practice in nonirrigated vineyards in the Willamette Valley, Oregon. Two studies were initiated to investigate the competitive and noncompetitive effects of grass cover crops on the growth and development of Pinot noir grapevines. Two greenhouse pot culture experiments were performed to...
Resource Type:: Masters Thesis
Full Text:: provide benefits to the vineyard without strong competition for soil water during the summer months

Fifth-year growth responses of Douglas-fir to crowding and other competition

Creator:: Cole, Elizabeth C.
Abstract:: This thesis examines the competitive aspects of Douglas-fir trees growing with two commonly associated competitors--red alder and grass--at varying densities. Two Nelder plots in three different environments in the Oregon Coast Range were studied. The sites represented the warm, dry climate of the Willamette Valley; the warm, moist climate of...
Resource Type:: Masters Thesis

Stand development and individual tree morphology and physiology of young Douglas-fir (pleudotsuga menziesii) in association with tanoak (Lithocarpus densiflorus)

Creator:: Harrington, Timothy B. (Timothy Brian)
Abstract:: Effects of tanoak (Lithocarpus densiflorus) on early growth, morphology, and physiology of Douglas-fir (Pseudotsuga menziesii) were studied to determine developmental characteristics of young stands and mechanisms of competition. Growth, leaf area, and biomass of Douglas-fir, tanoak, and shrubs / herbs were monitored for six years after establishing a gradient of...
Resource Type:: Dissertation

ScholarsArchive@OSU

The roles of provenance and phylogeny in recruitment, community assembly, and species coexistence in invaded California grasslands

Variation of carbon allocation and competitive ability of different tree species as related to successional position and habitat

Evaluation of allelopathy as a mechanism by which buckwheat suppresses Canada thistle and its mycorrhizae

Underplanting and competition in thinned Douglas-fir

Growth and carbon allocation of red alder seedlings grown over a density gradient

Effect of density, proportion, and spatial arrangement on the competition of winter wheat and Italian ryegrass (Lolium multiflorum Lam)

Interactive effects of stripe rust and plant competition in heterogeneous wheat populations

Water use of cool season grasses and their effect on grapevine (Vitis vinifera) growth and development

Fifth-year growth responses of Douglas-fir to crowding and other competition

Stand development and individual tree morphology and physiology of young Douglas-fir (pleudotsuga menziesii) in association with tanoak (Lithocarpus densiflorus)

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