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Filtering by: Subject Soils -- Cascade Range Committee Member Kleber, Markus Degree Level Master's

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:

coniferous forest on the western side of the central Oregon Cascade Range. The fate of these small glucose
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:

. Franco) at three sites in Oregon (Cascade Head, the H.J. Andrews, and McDonald Forest) that had a soil
Interactions between nitrogen, phosphorus, and molybdenum in forest soils and cyanobacterial lichen in the Oregon Coast Range

Creator:

Marks, Jade A.

Abstract:

Molybdenum is an essential component of biogeochemical cycling, most notably as a component of the nitrogenase enzyme used in biological nitrogen (N) fixation. While the important role of phosphorus (P) in limiting N fixation in ecosystems has been well documented, occurrence and prevalence of molybdenum (Mo) limitation is largely unknown....

Resource Type:

Masters Thesis

Full Text:

availability through soil acidification. As Coast Range forests mature to old-growth, their source of