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Filtering by: Subject Frankia -- Oregon -- H.J. Andrews Experimental Forest Contributor advisor sim Bottomley, Peter J.

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:

. Two experimental sites (Lookout and Carpenter) were chosen in the H. J. Andrews Experimental Forest
Episodic dynamics of microbial communities associated with the birth and death of ectomycorrhizal mats in old-growth Douglas-fir stands

Creator:

Blanchard, Joseph H.

Abstract:

Ectomycorrhizal (ECM) fungi of the genera Piloderma and Ramaria form dense hyphal mats in the organic and upper mineral soil layers, respectively, in coniferous forest floors of the Pacific Northwest. Previous studies have determined that fungal mats change the chemical, physical, and biological properties of the soil within. Little information...

Resource Type:

Masters Thesis

Full Text:

the H.J. Andrews Experimental Forest located in the Oregon Cascade Mountains. Samples from each mat
Response of soil microbial communities to physical and chemical disturbances: implications for soil quality and land use sustainability

Creator:

Chaer, Guilherme M.

Abstract:

The objectives of this thesis were to evaluate the responses of soil microbial communities to physical and chemical disturbances, and associate these responses with soil functional stability and changes in soil quality. The first study consisted of application of heat shocks (HS) to soils with contrasting land use history to...

Resource Type:

Dissertation

Full Text:

Characterization of sampling sites at the HJ Andrews Experimental Forest……………………………………………………………………... 109