Index Catalog // ScholarsArchive@OSU

Effects of vegetation and disturbance on fungal communities in the western Cascades of Oregon

Creator:: Kageyama, Stacie Ann, 1967-
Abstract:: The use of high throughput molecular methods that allow for the study of bacterial communities in environmental samples is commonplace in microbial ecology. Until recently, fungal community ecology has focused on isolation, collection of sporocarps, or collection of ectomycorrhizal roots. The techniques used to extract and amplify DNA from environmental...
Resource Type:: Dissertation
Full Text:: were located at the H.J. Andrews Experimental Forest Long Term Ecological Research site (44.2°N

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

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

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:: largest fraction of released N in these systems, and dynamics of DON in N cycle warrant further research

Contributions of ammonia-oxidizing bacteria and archaea to nitrification in forest soils

Creator:: Lu, Xinda
Abstract:: Prior to 2005, ammonia oxidation, the first step of nitrification, was thought mediated mainly by ammonia-oxidizing bacteria (AOB). However, the discovery of Thaumarchaeota carrying the genes coding for the ammonia monooxygenase (AMO) enzyme led to the discovery that ammonia-oxidizing archaea (AOA) also contribute to nitrification. Despite the uptick in studies...
Resource Type:: Masters Thesis
Full Text:: Nitrification in Forest Soils AN ABSTRACT OF THE THESIS OF Xinda Lu for the degree of Master of

The link between nitrogen cycling and soil microbial community composition in forest soils of western Oregon

Creator:: Boyle, Stephanie A.
Abstract:: The objectives of this thesis were to examine the links between soil microbial community composition and function using the nitrogen (N) cycle as a model for these interactions and to assess the impact of environmental factors such as microclimate, vegetation type, and nutrient availability on microbial diversity and N transformations...
Resource Type:: Dissertation
Full Text:: . Canadian Journal of Forest Research 22:1434-1437. Rich, J.J., Heichen, R.S., Bottomley, P.J., Cromack

Variation in communities of ammonia-oxidizing and denitrifying bacteria in Fennoscandian boreal forest soils

Creator:: Ghimire, Rama D.
Abstract:: The objective of this study was to examine the variation among ammonia-oxidizing and denitrifying communities in soils of a natural Fennoscandian boreal forest and of a forest with a long history of fertilization with different levels of nitrogen (N), and to examine whether there are any changes in the microbial...
Resource Type:: Masters Thesis
Full Text:: fertilizer since the 1960s to increase the forest productivity. The Swedish Forest Research Institute

Ammonia-oxidizer and denitrifier populations in boreal forest soils of differing nitrogen availability

Creator:: Burton, Marci S.
Abstract:: Nitrification and denitrification are major biological processes transforming nitrogen (N) in soils to plant available N, highly leachable nitrate (NO₃⁻) and gaseous N oxides. Although many studies in the past have studied N cycling communities, the effect of increased N inputs on ammonia-oxidizer and denitrifier population dynamics is still under...
Resource Type:: Masters Thesis
Full Text:: Ammonia-Oxidizer and Denitrifier Populations in Boreal Forest

Community composition and activities of denitrifying bacteria in soils

Creator:: Rich, Jeremy J.
Abstract:: Few studies have directly compared denitrifying community composition and activities in soils by coupling molecular-genetic techniques and traditional measures of denitnfication. I investigated communities of denitrifying bacteria from adjacent meadow and forest soils in the Cascade Mountains, Oregon. A key gene in the denitrification pathway, N₂O reductase (nosZ), served as...
Resource Type:: Dissertation
Full Text:: from adjacent meadow and forest soils in the Cascade Mountains, Oregon. A key gene in the

Soil Health and the Response of the Soil Microbial Community to Disturbances across Western North America

Creator:: Kersey, Jordan H.
Abstract:: Temperate coniferous forests, such as those that cover vast areas of the western US and Canada, have evolved to depend on cycles of disturbance for succession of species and overall ecosystem maintenance. Many of these forest systems are managed, often for timber production, where disturbances are of anthropogenic origin and...
Resource Type:: Masters Thesis
Full Text:: . Many of these forest systems are managed, often for timber production, where disturbances are of

ScholarsArchive@OSU

Effects of vegetation and disturbance on fungal communities in the western Cascades of Oregon

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

Litter controls of microbial community composition and function in forest soils

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

Contributions of ammonia-oxidizing bacteria and archaea to nitrification in forest soils

The link between nitrogen cycling and soil microbial community composition in forest soils of western Oregon

Variation in communities of ammonia-oxidizing and denitrifying bacteria in Fennoscandian boreal forest soils

Ammonia-oxidizer and denitrifier populations in boreal forest soils of differing nitrogen availability

Community composition and activities of denitrifying bacteria in soils

Soil Health and the Response of the Soil Microbial Community to Disturbances across Western North America

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