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Interactions between ecosystem nitrogen and bedrock control long-term calcium sources in Oregon Coast Range forests

Creator:: Hynicka, Justin D.
Abstract:: Ecosystem nitrogen (N) supply strongly influences the availability and cycling of other essential nutrients in temperate forests, especially calcium (Ca). Short-term additions of N that exceed ecosystem demands often increase dissolved nitrate fluxes and decrease soil pH, which can stimulate soil Ca loss. However, the long-term effects of high N...
Resource Type:: Masters Thesis
Full Text:: . Hynicka for the degree of Master of Science in Forest Ecosystems and Society and Soil Science presented

The development and decline dynamics of two ectomycorrhizal fungal mat soil microbial communities in response to a reciprocal soil transfer experiment in old-growth Douglas-fir forests

Creator:: Cappellazzi, Jed E.
Abstract:: Ectomycorrhizal fungi (EmF) form symbioses with trees. These symbioses profoundly influence forest ecology. Certain EmF form specialized profusions of hyphae, known as ectomycorrhizal fungal mats (mats) which are visible to the naked eye, alter forest soil biogeochemistry, substantially contribute to soil microbial biomass/respiration and support unique microbial communities. Piloderma and...
Resource Type:: Masters Thesis
Full Text:: combination of a graduate research assistantship in the laboratory of Dave Myrold, Soil Biology, and a

Low molecular weight organic acids in forest soils

Creator:: Hayden, John
Abstract:: Two studies concerning low molecular weight organic acids in soils were conducted. In the first study, anion exclusion chromatography was used to separate and identify 12 common organic acids, and the accuracy, precision and detection limits of the method were determined. The method was found to be sensitive and accurate...
Resource Type:: Masters Thesis
Full Text:: Langlois, 1990). Research has established the benefit to forest trees from these associations, and the

Soil genesis, classification, and nitrogen cycling in forest ecosystems of the northwestern Rif region of Morocco

Creator:: Ben Jelloun, Hassane
Resource Type:: Dissertation
Full Text:: my research work. My thanks are adressed to Dr. 0. M'Hirit (Director of the Forest Rechearch

Surface erosion on a clearcut in the Willamette National Forest

Creator:: George, Danella
Resource Type:: Masters Thesis
Full Text:: Forest AN ABSTRACT OF THE THESIS OF renella George for the degree of Master pi Science in Soil

Litter controls of microbial community composition and function in forest soils

Creator:: Brant, Justin B.
Abstract:: Most carbon (C) transformations in soil are carried out by a diverse and complex soil microbial community. The size and composition of the soil microbial community is determined by poorly understood interactions between the quantity and chemical composition of plant inputs, as well as climate. Given the metabolic diversity of...
Resource Type:: Masters Thesis
Full Text:: hardwood forest. Canadian Journal of Forest Research-Revue Canadienne De Recherche Forestiere 23:1402-1407

Consolidation, compression, and shear strength of four western Oregon forest soils

Creator:: McNabb, David H.
Abstract:: Forest soils with low bulk densities are often considered less susceptible to compaction than soils with higher bulk densities. The objective of this study was to determine if soil strength controlled the compression of soils with low bulk density. Four soils were selected for this evaluation. Three of these were...
Resource Type:: Dissertation
Full Text:: and David Baldassano of the Forest Research Laboratory is greatly appreciated. The research would

Effects of forest soil compaction on gas diffusion, denitrification, nitrogen mineralization, and soil respiration

Creator:: Pascoe, Frank (Frank Nicanor), 1958-
Resource Type:: Masters Thesis
Full Text:: Effects of forest soil compaction on gas diffusion

Soil biochemical measures as ecological indicators across agricultural and forest ecosystems of Oregon

Creator:: Knight, Timothy R.
Abstract:: A variety of soil properties have been proposed and tested as potential indicators of soil quality. This study was conducted in an effort to produce a standardized soil quality index for systems in Oregon. Soils in both forested and agricultural systems were sampled in a wide variety of locations, climates,...
Resource Type:: Masters Thesis
Full Text:: Ecological Indicators Across Agricultural and Forest Ecosystems of Oregon Abstract approved Richard P. Dick

Microbial and biochemical dynamics of ectomycorrhizal mat and non-mat forest soils

Creator:: Kluber, Laurel A.
Abstract:: Dense hyphal mats formed by ectomycorrhizal (EcM) fungi are prominent features in Douglas-fir (Pseudotsuga menziesii) forest soils and have been estimated to cover up to 40% of the forest floor in some stands. Although previous studies have examined various aspects of EcM fungi, little is known about their associated microbial...
Resource Type:: Dissertation
Full Text:: my research, I surveyed EcM mat and non-mat soils from early and late seral forest stands in the

ScholarsArchive@OSU

Interactions between ecosystem nitrogen and bedrock control long-term calcium sources in Oregon Coast Range forests

The development and decline dynamics of two ectomycorrhizal fungal mat soil microbial communities in response to a reciprocal soil transfer experiment in old-growth Douglas-fir forests

Low molecular weight organic acids in forest soils

Soil genesis, classification, and nitrogen cycling in forest ecosystems of the northwestern Rif region of Morocco

Surface erosion on a clearcut in the Willamette National Forest

Litter controls of microbial community composition and function in forest soils

Consolidation, compression, and shear strength of four western Oregon forest soils

Effects of forest soil compaction on gas diffusion, denitrification, nitrogen mineralization, and soil respiration

Soil biochemical measures as ecological indicators across agricultural and forest ecosystems of Oregon

Microbial and biochemical dynamics of ectomycorrhizal mat and non-mat forest soils

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