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Accuracy and suitability of several stand sampling methods in riparian zones

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dc.contributor.advisor Hailemariam, Temesgen
dc.creator Marquardt, Theresa
dc.date.accessioned 2010-04-05T18:25:43Z
dc.date.available 2010-04-05T18:25:43Z
dc.date.copyright 2010-02-22
dc.date.issued 2010-02-22
dc.identifier.uri http://hdl.handle.net/1957/15230
dc.description Graduation date: 2010 en
dc.description.abstract Stand structure in headwater riparian areas of western Oregon is highly variable making quantification of structural attributes within these stands difficult. A reliable sampling design is important to characterize and monitor changes in stand structure over time. This study examined sixteen alternatives for sampling live conifers and six alternatives for sampling hardwoods and snags. Each sampling alternative was replicated 500 times on a 72 meter square stem map at eight headwater stream locations in western Oregon. A variety of plot sizes and shapes were considered at two sampling intensities of 10 % and 20 % of the stand area. Applied to live conifers, the performance of the alternatives were assessed with respect to estimation of trees per hectare, basal area per hectare, and height to diameter ratio using root mean square error, average mean deviation and percent bias as criteria. Performance with respect to snags and hardwoods was similar. In general, rectangular strip designs oriented perpendicular to the stream outperformed circular, radial plots, and variable plots. en
dc.language.iso en_US en
dc.relation Explorer Site::Forest Explorer en
dc.subject sampling en
dc.subject forestry en
dc.subject riparian en
dc.subject Oregon en
dc.subject.lcsh Trees -- Sampling -- Oregon, Western -- Methodology en
dc.subject.lcsh Riparian forests -- Oregon, Western en
dc.subject.lcsh Forest surveys -- Oregon, Western -- Methodology en
dc.title Accuracy and suitability of several stand sampling methods in riparian zones en
dc.type Thesis/Dissertation en
dc.degree.name Master of Science (M.S.) in Forest Resources en
dc.degree.level Master's en
dc.degree.discipline Forestry en
dc.degree.grantor Oregon State University en


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