Index Catalog // ScholarsArchive@OSU

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:: Ectomycorrhizal Mat and Non- mat Forest Soils Abstract approved: David D. Myrold Dense hyphal mats

Response of Soil Microbial Activity and Community Composition to Timber Harvest in an Oregon Douglas-Fir Forest

Creator:: Martin, Kelsey M.
Abstract:: Forests and forest soils are some of the largest biologically active carbon reservoirs in the world. Therefore, understanding how disturbances, such as forest harvest, influence biogeochemical cycling is particularly important for managing forests sustainably. Timber harvest can have large impacts on forest soils, which may affect the long-term productivity and...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: ______________________________________________________ David D. Myrold

Response of soil microbial communities and nitrogen cycling processes to changes in vegetation inputs

Creator:: Brewer, Elizabeth Ann
Abstract:: Changes in the type and amount of plant inputs can occur gradually, as with succession, or rapidly, as with harvesting or wildfire. With global change it is anticipated that both gradual and immediate scenarios will occur at increasing frequency. Changes in vegetation inputs alter the quality and quantity of soil...
Resource Type:: Dissertation
Full Text:: Input. Abstract approved: ______________________________________ David D. Myrold

Response of Soil Microbially Mediated Nutrient Cycling and Community Structure to Timber Harvest in the Pacific Northwest

Creator:: Danielson, Rachel E.
Abstract:: Forest harvest persists as one of the most globally important industries, and crucially provides raw wood products for both building and fuel materials. Mechanistically complex abiotic and biotic processes curb ecosystem recovery following timber harvest and it is of great importance to understand the effects of this practice on biogeochemical...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ David D. Myrold Forest harvest persists as one of the most globally important industries, and

Functional profiles of soil microbial communities in second-growth Douglas-fir forests of the Pacific Northwest

Creator:: McGinnis, Megan L.
Abstract:: Forests are one of the largest repositories of terrestrial C. Understanding factors that drive organic matter transformations and nutrient efflux from these systems is therefore highly important. Temperate forests are of particular significance due to the large fraction of C that is stored below ground in the soil. Characterizing nutrient...
Resource Type:: Masters Thesis
Full Text:: -growth Douglas- fir Forests of the Pacific Northwest Abstract Approved: David D. Myrold

The effects of the Mazama tephra-falls : a geoarchaeological approach

Creator:: Matz, Stephan E.
Abstract:: About 7,000 years ago two major tephra-falls blanketed the Pacific Northwest in volcanic ash. These two tephra-falls, identified as the Llao and climatic tephra-falls, were a part of the eruptive events that led up to the collapse of Mount Mazama to form Crater Lake in the southern Oregon Cascades. The...
Resource Type:: Masters Thesis
Full Text:: time and comments. Dr. David Brauner, the chair of my committee, got me started in archaeology and

Soil community dynamics in sagebrush and cheatgrass-invaded ecosystems of the northern Great Basin

Creator:: DeCrappeo, Nicole M.
Abstract:: Sagebrush steppe ecosystems in the Great Basin have become increasingly threatened by the proliferation of cheatgrass (Bromus tectorum L.), an invasive annual grass. Diverse sagebrush and perennial bunchgrass landscapes can be converted to homogenous cheatgrass grasslands mainly through the effects of fire. Although the consequences of this conversion are well...
Resource Type:: Dissertation
Full Text:: Basin. Abstract approved: Peter J. Bottomley David D. Myrold

Biological soil crusts in forested ecosystems of southern Oregon : presence, abundance and distribution across climate gradients

Creator:: Olarra, Jennifer A.
Abstract:: In arid and semi-arid deserts, soils are commonly covered with biological soil crusts. The study of arid biocrusts and their ecological function has become increasingly common in the literature over the last several decades. Interestingly, no mention is made of biological soil crusts in forested ecosystems, raising the question as...
Resource Type:: Masters Thesis
Full Text:: inspiring the underlying logic behind this project and Dr. Paul Adams, Dr. David Graham, and Dr

Mineral Surfaces as Agents of Environmental Proteolysis: Mechanisms and Controls

Creator:: Chacon, Stephany S.
Abstract:: The bottleneck in the turnover of soil organic matter (SOM) is the conversion of large molecular compounds into smaller compounds that can be transported through a cell membrane of a microbe for processing. Once inside the cell, organic compounds can be converted into biomass or be respired. The microbial depolymerization...
Resource Type:: Dissertation
Full Text:: completing my work I’d like to thank my committee Dr. David Myrold, Dr. Peter Bottomley, Dr. Maria Dragila

Assessing the role of reactive metal species in soil organic matter cycling using chemical imaging

Creator:: Keiluweit, Marco
Abstract:: Intimate associations with reactive metal species permanently protect soil organic matter (SOM) from microbial access and oxidation, contributing to the build-up of organic carbon (C) stocks in soils. It is increasingly recognized, however, that such associations can be reversible and that reactive metal species might even facilitate the oxidation of...
Resource Type:: Dissertation
Full Text:: sinuous PhD studies. A special thanks to my committee members David Myrold, Doug Maguire and Fred Prahl

ScholarsArchive@OSU

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

Response of Soil Microbial Activity and Community Composition to Timber Harvest in an Oregon Douglas-Fir Forest

Response of soil microbial communities and nitrogen cycling processes to changes in vegetation inputs

Response of Soil Microbially Mediated Nutrient Cycling and Community Structure to Timber Harvest in the Pacific Northwest

Functional profiles of soil microbial communities in second-growth Douglas-fir forests of the Pacific Northwest

The effects of the Mazama tephra-falls : a geoarchaeological approach

Soil community dynamics in sagebrush and cheatgrass-invaded ecosystems of the northern Great Basin

Biological soil crusts in forested ecosystems of southern Oregon : presence, abundance and distribution across climate gradients

Mineral Surfaces as Agents of Environmental Proteolysis: Mechanisms and Controls

Assessing the role of reactive metal species in soil organic matter cycling using chemical imaging

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