The spatial autocorrelation of individual tree characteristics in loblolly pine stands

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dc.contributor.authorReed, David Dossen
dc.contributor.committeechairBurkhart, Harold E.en
dc.contributor.committeememberBurger, James A.en
dc.contributor.committeememberBurk, Thomas E.en
dc.contributor.committeememberOderwald, Richarden
dc.contributor.committeememberReynolds, Marion R. Jr.en
dc.contributor.departmentForestryen
dc.date.accessioned2017-01-30T21:23:22Zen
dc.date.available2017-01-30T21:23:22Zen
dc.date.issued1982en
dc.description.abstractMathematical methods of assessing the spatial autocorrelation associated with individual tree characteristics in forest stands were identified. These measures were used to investigate the spatial autocorrelation of discrete tree characteristics including the species, product, and defect classifications. With the exception of the species classification, none of the discrete tree characteristics examined showed any evidence of significant (α = 0.05) levels of spatial autocorrelation in loblolly pine stands. The significant autocorrelation of the species classification was probably due to past stand history or microsite variability rather than overall stand conditions such as age, density, or percent pine. The relationship between the level of spatial autocorrelation associated with basal area and several descriptive stand characteristics was also examined. No strong relationships were identified but trends were noticed between the autocorrelation measures and measures of stand competition such as basal area and crown competition factor. The measures of spatial association indicate positive autocorrelation between the characteristics of neighboring trees at very low levels of competition with the autocorrelation becoming increasingly negative as competition increases. At extremely high levels of competition, the spatial autocorrelation measures become positive again, reflecting the stagnated condition of the stand. Methods were developed, using the measures of spatial autocorrelation, to assign characteristics to individual trees in computer generated stands. These methods, applicable for discrete or continuous characteristics; assign the characteristics to individual trees depending on the spatial location of the individual tree and the locations and characteristics of its neighbors.en
dc.description.degreePh. D.en
dc.format.extentvii, 126, [2] leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/74640en
dc.language.isoen_USen
dc.publisherVirginia Polytechnic Institute and State Universityen
dc.relation.isformatofOCLC# 9185225en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1982.R632en
dc.subject.lcshLoblolly pine -- Spacingen
dc.subject.lcshAutocorrelation (Statistics)en
dc.subject.lcshForests and forestry -- Measurementen
dc.titleThe spatial autocorrelation of individual tree characteristics in loblolly pine standsen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineForestryen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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