Index Catalog // ScholarsArchive@OSU

Microbial community dynamics associated with rhizosphere carbon flow

Creator:: Butler, Jessica L.
Abstract:: The cycling of root-deposited photo synthate (rhizodeposition) through the soil microbial biomass is widely recognized as a critical component of ecosystem functioning. Little is currently known about the flow of photosynthate through the microbial biomass however. My research goal was to examine if and how the flow of root-deposited photo...
Resource Type:: Masters Thesis
Full Text:: , J.J. 2002. Stable isotopes and biomarkers in microbial ecology. FEMS Microbiology Ecology 40, 85-95

Linking soluble C to microbial community composition and dynamics during decomposition of ¹³C-labeled ryegrass

Creator:: McMahon, Shawna K.
Abstract:: Ryegrass residue consists of three main C fractions: readily available soluble C, intermediately available cellulose and hemicellulose, and slowly available lignin. Changes in chemical composition during decomposition influence rate of degradation as well as composition of the microbial community involved. Use of ¹³C-labeled plant material coupled with analysis of phospholipid...
Resource Type:: Masters Thesis
Full Text:: soil microbial ecology, an examination of current methodology and some of the limitations of PLFA

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:: to examine whether there are any changes in the microbial communities after the termination of N

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:: Environmental Microbiology 64:4202-4209. 16 Atlas, R.M., and R. Bartha. 1998. Microbial Ecology

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:: presented on September 24, 2013. Title: Functional Profiles of Soil Microbial Communities in Second

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:: system, supported by over 30 years of research, to test difficult microbial ecology questions

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:: technology have enabled detailed examination of the microbial community within the soil. Molecular ecology

Carbon cycling and priming of soil organic matter decomposition in a forest soil following glucose additions

Creator:: Diaz, David D.
Abstract:: Soils are a globally significant carbon (C) pool and have the potential to respond to elevated CO2 and environmental changes through positive feedback cycles that enhance the turnover of soil organic matter (SOM). Understanding the mechanisms governing the turnover of SOM is particularly important for modeling the fate of C...
Resource Type:: Masters Thesis
Full Text:: interpreted the primed C to derive from the activation and turnover of microbial biomass or from the

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:: provides insight into the variability of the microbial community populations responsible for regulating

Quantifying the fertilizer value of algal meal : an evaluation of an integrated dairy-anaerobic digester-algae production facility

Creator:: Andrews, Shannon B.
Abstract:: Algae have shown great potential as a source for renewable fuels. However, current production schemes have not been able to prove a sustainable energy return on investment due in part to the high costs of nutrient addition and the energy required for drying the biomass. Integrated algae-dairy production systems have...
Resource Type:: Masters Thesis
Full Text:: , microbial respiration rate, and extracellular enzyme production, yield of sweet corn, and not have any

ScholarsArchive@OSU

Microbial community dynamics associated with rhizosphere carbon flow

Linking soluble C to microbial community composition and dynamics during decomposition of ¹³C-labeled ryegrass

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

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

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

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

Carbon cycling and priming of soil organic matter decomposition in a forest soil following glucose additions

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

Quantifying the fertilizer value of algal meal : an evaluation of an integrated dairy-anaerobic digester-algae production facility

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