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Initial and future stand development following mountain pine beetle in harvested and uncut lodgepole pine forests

dc.contributor.authorCollins, Byron Joshua, author
dc.contributor.authorRomme, William, advisor
dc.contributor.authorRhoades, Charles, advisor
dc.contributor.authorHubbard, Robert, committee member
dc.contributor.authorMartin, Patrick, committee member
dc.descriptionCovers not scanned.
dc.description.abstractThe extent and severity of over tory lodgepole pine (Pinus contorta Dougl.) mortality from mountain pine beetle (Dendroctonus ponderosae Hopkins) has created management concerns associated with forest regeneration, wildfire risk, human safety, and scenic, wildlife and watershed resources in western North America. In northern Colorado and southern Wyoming the long-term ecological and socioeconomic consequences of the outbreak hinge upon the response of tree regeneration in both harvested and untreated forests. To characterize initial and future forest development following mountain pine beetle mortality I conducted two studies. First, I used historic U.S. Forest Service stand and seedling survey records to compare the density and species composition of advance regeneration in uncut stands and post-harvest recruits in clearcut harvest units during pre-outbreak (1980-1996) and outbreak (2002-2007) period. Second, I compared the effects of various intensities of forest management on site conditions, seedling establishment and growth of advance regeneration to uncut areas in beetle-infested lodgepole pine stands. Advance regeneration averaged 3,953 stems ha-1 and was at least as high in beetle-infested stands compared to the pre-outbreak period. Lodgepole pine advance regeneration showed increased leader growth from 2008 to 2009 in harvested and untreated stands in response to canopy removal and decreased canopy foliage following overstory mortality. The density of seedling recruitment was three times higher in harvested than untreated stands (6,487 versus 2,021 seedlings ha-1), and did not differ between outbreak and pre-outbreak stands. Growth simulations showed uncut and partial cut stands will be dominated by subalpine fir (Abies lasiocarpa), while clearcut stand will be dominated by lodgepole pine and have attributes similar to pre-outbreak stands within a century.
dc.format.mediummasters theses
dc.publisherColorado State University. Libraries
dc.relationCatalog record number (MMS ID): 91014245449703361
dc.relationSD409 .C655 2010
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see
dc.subject.lcshForest regeneration
dc.subject.lcshMountain pine beetle
dc.subject.lcshLodgepole pine -- Diseases and pests
dc.titleInitial and future stand development following mountain pine beetle in harvested and uncut lodgepole pine forests
dcterms.rights.dplaThis Item is protected by copyright and/or related rights ( You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s)., Rangeland, and Watershed Stewardship State University of Science (M.S.)


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