Index Catalog // ScholarsArchive@OSU

Community profiles of ammonia oxidizers across high-elevation forest-to-meadow transects

Creator:: Mintie, Ann
Abstract:: In recent years considerable interest has been shown in the diversity of ammonia-oxidizing bacteria in soil communities. The majority of the research has been carried out in Northern Europe where soils have received high atmospheric inputs of nitrogen over the past two centuries. In contrast, although much work has been...
Resource Type:: Masters Thesis
Full Text:: measuring nitrification potential along a high-elevation temperate meadow-to-forest gradient, and

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

Facilities development master plan for H.J. Andrews Experimental Forest and associated research natural areas, Willamette National Forest and Range Experiment Station

Creator:: Willamette National Forest (Agency : U.S.) and Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Abstract:: Gerald W. Williams Collection
Resource Type:: Book
Full Text:: I II IApprove H Facilities Development Master Plan for H.J. Andrews Experimental Forest and

Water residence time and runoff generation in the western Cascades of Oregon

Creator:: McGuire, Kevin J.
Abstract:: The age, or residence time of water is a fundamental descriptor of catchment hydrology, revealing information about the storage, flow pathways and source of water in a single integrated measure. While there has been tremendous recent interest in residence time to characterize catchments, there are few studies that quantify residence...
Resource Type:: Dissertation

Arthropods associated with various age stands of Douglas-fir from foliar, ground, and aerial strata

Creator:: Mispagel, Michael E., Rose, Sharon Diane, and U.S. International Biological Program. Coniferous Forest Biome
Abstract:: The arthropod community in a Douglas-fir forest near Blue River, Lane County, Oregon was investigated from March through August 1973. Five stands of Douglas-fir were sampled: two clearcuttings, a young-growth (20 years old), a midgrowth (125 years old), and an old-growth (450 years old) plot. A pole pruner was used...
Resource Type:: Technical Report
Full Text:: the H. J. Andrews Experimental Forest, Oregon, March 27 to August 7, 1973. 22-25 2. Total numbers of

The historic and contemporary ecology of western Cascade meadows : archeology, vegetation, and macromoth ecology

Creator:: Highland, Steven A.
Abstract:: Montane meadows in the western Cascades of Oregon occupy approximately 5% of the landscape, but contribute greatly to the region's biodiversity. Western Cascades meadows are dynamic parts of the landscape and have contracted by over 50% in the past two hundred years in the HJ Andrews Experimental Forest (hereafter Andrews...
Resource Type:: Dissertation
Full Text:: McKenzie River watershed. The high ridges of the HJ Andrews Experimental Forest were analyzed using air

H.J. Andrews Experimental Forest reference stand system : establishment and use history

Creator:: Hawk, Glenn M. and U.S. International Biological Program. Coniferous Forest Biome
Abstract:: Nineteen l/4-hectare reference stands have been established in the central western Cascade Mountains of Oregon to represent widespread and important portions of the vegetation continuum. Their species diversity, cover, and structure are described here. The stands provide points of reference for visiting scientists and researchers who wish to design experiments...
Resource Type:: Technical Report
Full Text:: Studies OREGON STATE. LIBRARIES 12 0.141670949 5 F 6 6 ,:! W H. J. ANDREWS EXPERIMENTAL FOREST

Study of some biological and nutritional factors that influence nodulation by Frankia on red alder (Alnus rubra) and snowbrush (Ceanothus velutinus) within three age-class Douglas-fir forests in H.J. Andrews Experimental Forest, Oregon

Creator:: Rojas-Melo, Nestor S.
Abstract:: Bioassays using red alder and snowbrush plants grown in soils collected from a clearcut, a young Douglas-fir plantation, and an old-growth stand were conducted. Sites are located at the Andrews Experimental Forest, Oregon. In the first bioassays, more alder than snowbrush plants survived and nodulated. Of the plants that survived,...
Resource Type:: Dissertation

Measurement and modeling the physical controls of snowmelt in the Pacific Northwest

Creator:: Mazurkiewicz, Adam B.
Abstract:: The physical controls of snowmelt in the Pacific Northwest (PNW) are poorly understood. While there have been numerous field and modeling investigations at the plot and watershed scale, few studies have identified how the snow energy balance (EB) components vary in importance both spatially and temporally. The identification of how...
Resource Type:: Masters Thesis
Full Text:: H.J. Andrews Experimental Forest (HJA) in the western Cascade Mountains of Oregon found that

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:: was established at seven old-growth Douglas-fir sites in the H.J. Andrews Experimental Forest. At

ScholarsArchive@OSU

Community profiles of ammonia oxidizers across high-elevation forest-to-meadow transects

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

Facilities development master plan for H.J. Andrews Experimental Forest and associated research natural areas, Willamette National Forest and Range Experiment Station

Water residence time and runoff generation in the western Cascades of Oregon

Arthropods associated with various age stands of Douglas-fir from foliar, ground, and aerial strata

The historic and contemporary ecology of western Cascade meadows : archeology, vegetation, and macromoth ecology

H.J. Andrews Experimental Forest reference stand system : establishment and use history

Study of some biological and nutritional factors that influence nodulation by Frankia on red alder (Alnus rubra) and snowbrush (Ceanothus velutinus) within three age-class Douglas-fir forests in H.J. Andrews Experimental Forest, Oregon

Measurement and modeling the physical controls of snowmelt in 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

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