Graduate Thesis Or Dissertation
 

Prescribed fire in Eastern Oregon ponderosa pine forests : relationships between soil fertility and ecology

Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/8049g7390

Descriptions

Attribute NameValues
Creator
Abstract
  • I conducted two separate studies, both related to the impacts of spring and fall prescribed fire on ponderosa pine (Pinus ponderosa Dougl. ex Loud.) forest soils in Eastern Oregon. The studies were either conducted at or linked to four stands of ponderosa pine, in the Malheur National Forest. Each stand received three treatments: spring prescribed burn, fall prescribed burn and no burn. For the first study, ion exchange resin bags were used to measure the relative concentrations of NO 3-, NH4+, Ca+, K+, PO4, Na+, total P and total S in the soil solution under the three different treatments. The second study focused on soil ecology and consisted of three projects: microarthropod feeding preference trials, microarthropod stable isotopes (8 15N and 613C) as indicators of feeding habits and the role of microarthropod grazing in fungal competition. All arthropods and fungi used were either collected at the Eastern Oregon field sites or selected as representative species for ponderosa pine forest soils. Most microarthropods exhibited distinct feeding preferences in the feeding preference trials. Isotopic ratios (for 8 13C and 5 15N) suggested that different microarthropod species have distinct diets in the field. Isotope ratios appear to be indicators of trophic level for soil microarthropods. Fungal competition experiments indicated that microarthropod grazing can sometimes alter fungal competition and can therefore shape the fungal community.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Publisher
Peer Reviewed
Language
File Format
File Extent
  • 3251988 bytes
Digitization Specifications
  • Master files scanned at 600 ppi (256 Black and White) using Capture Perfect 3.0 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 ppi (256 Black and White) using Capture Perfect 3.0 and OmniPage Professional 15.0 for textual OCR on a Canon DR-9080C.
Replaces

Relationships

Parents:

This work has no parents.

In Collection:

Items

Thumbnail Title Date Uploaded Visibility Actions
file details Grossmann_Emilie_B_ocr.pdf 2017-08-01 Public Download