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Hydrological consequences of two native shrubs in semi-arid Senegal : patterns, processes, concepts and methods

Creator:: Kizito, Fred
Abstract:: Water availability is a critical limiting element in semi-arid ecosystem productivity and presents particular challenges in Sahelian countries such as Senegal. The landscapes are characterized by the presence of two common semi-arid shrubs (Piliostigma reticulatum and Guiera senegalensis), both of which may be important hydraulic regulators in these water-limited ecosystems....
Resource Type:: Dissertation
Full Text:: requires knowledge of root 5 distribution and plant consumptive water use patterns (Ong et al., 1991

Spatial analysis and modeling of carbon storage in native shrubs of Senegal's Peanut Basin

Creator:: Lufafa, Abel
Abstract:: Farmlands, grasslands, and savannas in semi-arid sub-Sahelian Africa have the potential to store carbon (C) in soil. There is a great need to manage ecosystems to increase C storage in semipermanent soil pools. This will improve soil quality, impede desertification and by reducing atmospheric CO₂ levels, will slow climate change....
Resource Type:: Dissertation

A G-type Lectin Receptor-like Kinase Associated with Septoria Canker Resistance and Susceptibility Described using Multi-omics and Biotechnology

Creator:: Lenz, Ryan R.
Abstract:: Managers of forest and plantation ecosystems are encountering growing problems involving plant pathogens and the expanding geographic ranges of these pathogens. Historically unexposed stands are exceptionally vulnerable when a non-native pathogen is introduced because these pathogens can cause devastating disease in a host population that lacks co-evolved resistance mechanisms. One...
Resource Type:: Dissertation
Full Text:: DISSERTATION OF Ryan R. Lenz for the degree of Doctor of Philosophy in Botany and Plant Pathology

Comparison of the water relations characteristics of woody plants in western Oregon

Creator:: Davis, Kent J.
Abstract:: I studied the water relations traits, twig conductivity, C'3 isotopic composition, and wood density of three conifer and five angiosperm species in western Oregon. This study took place from spring 2002 to fall 2003 on four sites. Species were selected to represent the diversity of drought tolerance of woody plants...
Resource Type:: Masters Thesis
Full Text:: Relations Properties and Seasonal Variation 67 Suites of Water Relations Properties and Plant Adaptation

Ecohydrological mediation of water budget partitioning and time scales of subsurface flow in a seasonally semi-arid grassland

Creator:: Pangle, Luke A.
Abstract:: Understanding how the interactions and feedbacks between plant function, climate, and soils ultimately affects the terrestrial water balance and subsurface flow processes is major challenge in scientific hydrology. This dissertation summarizes the findings of a manipulative climate warming experiment, an observational field study that utilized stable-isotope tracers, and associated modeling...
Resource Type:: Dissertation
Full Text:: ]. Plant canopies intercept precipitation and dramatically alter the amount and pathway of water that

Physiological impacts of groundwater and surface water application on desert graminoids of different geographic origin

Creator:: Abdallah, Mohamed (Mohamed Ahmed B.)
Abstract:: Desert plant communities are among the most sensitive to changes in soil water conditions. In areas with shallow aquifers, it is important to understand both the effects of groundwater alterations on vegetation and how changes in surface-soil water affect plant water uptake. Studies in arid environments have evaluated the effect...
Resource Type:: Masters Thesis
Full Text:: : Ricardo Mata-Gonzalez Desert plant communities are among the most sensitive to changes in soil water

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

Community Ecology of Foliar Fungi and Oomycetes of Pseudotsuga menziesii on the Pacific Northwest Coast

Creator:: Gonen, Lilah
Abstract:: Pseudotsuga menziesii var. menziesii (coast Douglas-fir) is a tree of ecological, economic, and cultural value in its native North American Pacific Northwest (PNW) distribution. P. menziesii is host to a variety of well-documented endophytic foliar microorganisms, including the fungus Nothophaeocryptopus gaeumannii, the causal agent of Swiss needle cast (SNC), and...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Botany and Plant Pathology presented on December 9, 2020. Title

Diagnosis and Etiology of a Soilborne Disease Complex of Winter Squash (Cucurbita maxima) in the Willamette Valley, OR

Creator:: Rivedal, Hannah M.
Abstract:: Winter squash (Cucurbita maxima) grown in Oregon’s Willamette Valley for edible seed, frozen foods, and fresh markets is susceptible to an undiagnosed soilborne disease. Diseased squash fields exhibit symptoms of stunting, root and crown rot, vascular discoloration, and late-season wilt, which in extreme cases can lead to total crop failure....
Resource Type:: Dissertation
Full Text:: THE DISSERTATION OF Hannah M. Rivedal for the degree of Doctor of Philosophy in Botany and Plant

Soil organic matter management and root health

Creator:: Darby, Heather
Abstract:: Annual applications of fresh or composted dairy manure were assessed for their effects on root rots of sweet corn and snap bean and damping-off of cucumber in a field soil. Soil biological and physical properties were measured as possible indicators of root rot suppressive potential. Regardless of amendment type or...
Resource Type:: Dissertation
Full Text:: drainage can reduce the growth, movement, and plant infection of water loving pathogens such as the

ScholarsArchive@OSU

Hydrological consequences of two native shrubs in semi-arid Senegal : patterns, processes, concepts and methods

Spatial analysis and modeling of carbon storage in native shrubs of Senegal's Peanut Basin

A G-type Lectin Receptor-like Kinase Associated with Septoria Canker Resistance and Susceptibility Described using Multi-omics and Biotechnology

Comparison of the water relations characteristics of woody plants in western Oregon

Ecohydrological mediation of water budget partitioning and time scales of subsurface flow in a seasonally semi-arid grassland

Physiological impacts of groundwater and surface water application on desert graminoids of different geographic origin

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

Community Ecology of Foliar Fungi and Oomycetes of Pseudotsuga menziesii on the Pacific Northwest Coast

Diagnosis and Etiology of a Soilborne Disease Complex of Winter Squash (Cucurbita maxima) in the Willamette Valley, OR

Soil organic matter management and root health

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