Index Catalog // ScholarsArchive@OSU

Influences of nitrogen on carbon dynamics in forest soil and density fractions

Creator:: Swanston, Christopher W.
Abstract:: Application of N fertilizer is a common forest management practice in the Pacific Northwest, yet the long-term influence of fertilization on forest soil properties is not well known. Although elevated N often increases mineralization of C and N from labile organic matter, negative effects have been documented in recalcitrant organic...
Resource Type:: Dissertation

Measuring Electron Activity to Constrain the Role of Soil Structure in the Formation of Biogeochemical Heterogeneity

Creator:: Wanzek, Thomas
Abstract:: Soils have a critical role in global carbon (C) cycling, containing one of the largest fast-cycling carbon stocks on earth. Robust representation of soil organic matter dynamics in Earth System Models is critical for future climate prediction. Current C cycling models assume that all C cycling in non-hydric (i.e. ‘upland’)...
Resource Type:: Masters Thesis
Full Text:: toward my committee, Mark Johnson, Maria Dragila, and Jeff Jenkins. Thank you for always being

Characteristics of dissolved organic matter (DOM) and its stabilization in forest soil

Creator:: Yano, Yuriko
Abstract:: Dissolved organic matter (DOM) plays an important role in transport of C and essential nutrients such as N, P and S. DOM is also critical for the formation of soil organic matter (SOM), which is the largest terrestrial C pool. Nonetheless, we lack a basic understanding of what controls immobilization...
Resource Type:: Dissertation

Soil respiration, carbon and nitrogen leaching, and nitrogen availability in response to harvest intensity and competing vegetation control in Douglas-fir (Pseudotsuga menziesii) forests of the Pacific Northwest

Creator:: Slesak, Robert A.
Abstract:: Management practices following forest harvest can affect long-term soil productivity through alteration of soil carbon (C) and nitrogen (N) pools, but processes contributing to change are poorly understood. I assessed effects of three levels of logging-debris retention in combination with initial or annual applications of competing vegetation control (CVC) following...
Resource Type:: Dissertation
Full Text:: I asked for it. Many thanks to Mark Johnson, Dave Myrold, and Terry Brown for serving on my

Sea-Salt Impacts On Nutrient Cycling In Oregon Coastal Soils

Creator:: Aleman, Ruben
Abstract:: Sea-salt aerosols (SSA) impact the cycling of nutrients within coastal soils, including the mobility of dissolved organic carbon (DOC) and ammonium, denitrification, and litter decomposition. These aerosols are formed during tumultuous weather in the open ocean and are transported and deposited inland by wind. Soils closer to the ocean are...
Resource Type:: Masters Thesis
Full Text:: research. I’d also like to thank my committee; Kate Lajtha, Mark Johnson, and Miguel Goni. Kate has

Effects of season and interval of prescribed burns on pyrogenic carbon cycling in ponderosa pine stands in Malheur National Forest

Creator:: Matosziuk, Lauren
Abstract:: In ponderosa pine (Pinus ponderosa) forests of the western United States, prescribed fires are used to reduce fuel loads and restore historical fire regimes. The season in which prescribed burns are performed and the interval between burns can have complex consequences for the ecosystem, including soil carbon cycling through the...
Resource Type:: Masters Thesis
Full Text:: information about the history of the project as well as many years of vegetation and fuels data. Dr. Mark

Characteristics of soil organic matter in two forest soils

Creator:: Crow, Susan E.
Abstract:: Soil organic matter (SOM) is the terrestrial biosphere's largest pool of organic carbon (C) and is an integral part of C cycling globally. Soil organic matter composition typically can be traced directly back to the type of detrital inputs; however, the stabilization of SOM results as a combination of chemical...
Resource Type:: Dissertation
Full Text:: and time. I also thank my committee members Elizabeth Sulzman, Chris Swanston, Mark Johnson, Pat Muir

Persistence of aromatic compounds in soils and sediments : a molecular perspective

Creator:: Keiluweit, Marco
Abstract:: This thesis explores open questions regarding molecular forms and interactions of natural and synthetic aromatic compounds present in soils and sediments. Plant biomass-derived black carbon (biochar) generated through incomplete natural and anthropogenic combustion processes is a major source of aromaticity in terrestrial ecosystems. Chapter one represents a detailed account of...
Resource Type:: Masters Thesis
Full Text:: members Jennifer A. Field and Mark G. Johnson. I also thank Fredrick G. Prahl and Margret A. Sparrow for

Evaluating Community Engagement in Wave Energy Siting off the Oregon Coast

Creator:: Goodwin, Briana
Abstract:: The ocean off Oregon's coast is a busy place with many activities occurring that can sometimes be in competition or cooperation. Deciding how new uses fit with existing ocean uses is complex, but there are some tools available to help decision-makers. Generating energy from waves is an emerging ocean use...
Resource Type:: Masters Thesis
Full Text:: , Mark Needham, Teresa Johnson, Belinda Batten and Kaety Jacobson for

Division algebra representations of SO(4,2)

Creator:: Kincaid, Joshua James
Abstract:: Representations of SO(4,2;R) are constructed using 4 x 4 and 2 x 2 matrices with elements in H' ⊗ C . Using 2 x 2 matrix representations of C and H', the 4 x 4 representation is interpreted in terms of 16 x 16 real matrices. Finally, the known isomorphism...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Influences of nitrogen on carbon dynamics in forest soil and density fractions

Measuring Electron Activity to Constrain the Role of Soil Structure in the Formation of Biogeochemical Heterogeneity

Characteristics of dissolved organic matter (DOM) and its stabilization in forest soil

Soil respiration, carbon and nitrogen leaching, and nitrogen availability in response to harvest intensity and competing vegetation control in Douglas-fir (Pseudotsuga menziesii) forests of the Pacific Northwest

Sea-Salt Impacts On Nutrient Cycling In Oregon Coastal Soils

Effects of season and interval of prescribed burns on pyrogenic carbon cycling in ponderosa pine stands in Malheur National Forest

Characteristics of soil organic matter in two forest soils

Persistence of aromatic compounds in soils and sediments : a molecular perspective

Evaluating Community Engagement in Wave Energy Siting off the Oregon Coast

Division algebra representations of SO(4,2)

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