Download or read book Mountain Pine Beetle Stand Susceptibility Rating Systems and Silvicultural Management Guidelines for Eastern Oregon Lodgepole and Ponderosa Pine Stands written by Swaby J. and published by . This book was released on 1981 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the National Silviculture Workshop written by and published by . This book was released on 1985 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Growth of Lodgepole Pine Stands and Its Relation to Mountain Pine Beetle Susceptibility written by S. A. Mata and published by . This book was released on 2003 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Periodic diameter and basal area growth were determined for partially cut stands of lodgepole pine at five locations over approximately 10 year periods. After cutting, average diameters in the partially cut plots generally increased by 0.8 inches or more, while average diameter in the uncut controls increased by 0.6 inches or less. Diameter growth in the partially cut plots was generally significantly greater than diameter growth in the controls. Individual tree growth is discussed in relation to potential susceptibility to mountain pine beetle infestation. Basal area decreased in three of the four GSL (growing stock level) 40 stands because of windthrow. Basal area generally increased >1.0 ft 2 / acre/year in partially cut plots except in the GSL 40 stands with substantial windthrow and one GSL 100 with an Armillaria infection pocket. Basal area increases in the control plots ranged from 0.2 to 1.1 ft 2 /acre/year, although the one control with a BA growth rate of 1.1 ft 2 /acre/year had a relatively low initial BA. Data from the stands are employed in the susceptibility rating methods of Amman et al.(1977), Shore and Safranyik (1992),and Anhold et al. (1996 to determine stand susceptibility and the results discussed in terms of general applicability of these methods to partially cut stands. Basal area growth is used to estimate the length of time required for various stand densities to reach specific susceptibility thresholds for mountain pine beetle infestation. Several of the GSL 40 stands are not projected to reach the susceptibility thresholds in 100 years because of windthrow. Barring mortality 1%,GSL 80 stands are estimated to reach the basal area threshold of 120 ft 2 per acre in

Download or read book Growth of Ponderosa Pine Stands in Relation to Mountain Pine Beetle Susceptibility written by and published by . This book was released on 1999 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ten-year diameter and basal area growth were determined for partially cut stands at 4 locations. Average diameters in the partially cut plots generally increased by 1 inch or more, while average diameter in the uncut controls increased by 0.9 inches or less. Individual tree growth is discussed in relation to potential susceptibility to mountain pine beetle infestation. Basal area increases ranged from 0.9 to 1.9 ft2/acre/ yr in partially cut plots, while basal area increases in the control plots ranged from 0.4 to 1.4 ft2/acre/yr. Endemic mountain pine beetle infestations and snow breakage accounted for most of the mortality on the plots, which decreased the residual basal area and basal area growth. Increases in basal area are used to estimate the length of time required for various stand densities to reach the susceptibility thresholds for mountain pine beetle infestation. Stand marking may influence future susceptibility to beetle infestations.

Download or read book Mountain Pine Beetle Attack in Ponderosa Pine Comparing Methods for Rating Susceptibility written by David C. Chojnacky and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two empirical methods for rating susceptibility of mountain pine beetle attack in ponderosa pine were evaluated. The methods were compared to stand data modeled to objectively rate each sampled stand for susceptibly to bark-beetle attack. Data on bark-beetle attacks, from a survey of 45 sites throughout the Colorado Plateau, were modeled using logistic regression to estimate the probability of attack on individual trees from tree and stand variables. The logistic model allowed flexibility to easily scale results up to a stand level for comparison to the empirical methods. The empirical method, developed by Munson and Anhold, most closely correlated to the logistic regression results. However, the Munson/Anhold method rated all 45 study sites as either moderately or highly susceptible to bark-beetle attack, which raises concern about its lack of sensitivity. Future work on evaluating risk of bark-beetle impact should consider more than stand characteristics.

Download or read book The Mountain Pine Beetle written by Pacific Forestry Centre and published by . This book was released on 2006 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book presents a synthesis of published information on mountain pine beetle (Dendroctonus ponderosae Hopkins [Coleoptera: Scolytidae]) biology and management with an emphasis on lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) forests of western Canada. Intended as a reference for researchers as well as forest managers, the book covers three main subject areas: mountain pine beetle biology, management, and socioeconomic concerns. The chapters on biology cover taxonomy, life history and habits, distribution, insect-host tree interactions, development and survival, epidemiology, and outbreak history. The management section covers management strategy, survey and detection, proactive and preventive management, and decision support tools. The chapters on socioeconomic aspects include an economic examination of management programs and the utilization of post-beetle salvage timber in solid wood, panelboard, pulp and paper products."--Publisher's description.

Download or read book Mountain Pine Beetle Dynamics in Lodgepole Pine Forests written by Walter E. Cole and published by . This book was released on 1980 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mountain Pine Beetle Dynamics in Lodgepole Pine Forests written by Walter E. Cole and published by . This book was released on 1980 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proposed Land and Resource Management Plan written by and published by . This book was released on 1986 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Source Or Sink Stands written by Niklas Björklund and published by . This book was released on 2008 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stand-level planning of lodgepole pine management can benefit from the use of mountain pine beetle susceptibility-risk model analyses to assign treatment priority. Priority is currently assigned based solely on relative levels of expected volume loss in the event of a mountain pine beetle outbreak. We evaluated the possibility to predict the relative contribution of brood beetles, by infested stands, to the next beetle generation. Existing data were used to develop generalized parameters for inclusion in predictive models of stand-level mortality and brood production. Model output for independent stands achieved a highly significant relationship with measured outcomes of brood productivity, indicating that relative levels of brood production can be predicted and incorporated into decision-models.

Download or read book Bark Beetle Risk in Mature Ponderosa Pine Forests in Western Montana written by Philip Cornwell Johnson and published by . This book was released on 1972 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mountain Pine Beetle written by William F. McCambridge and published by . This book was released on 1979 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Hazard Rating System for Western Montana Ponderosa Pine Stands Susceptible to Mountain Pine Beetle written by Robert S. Loveless and published by . This book was released on 1981 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Thinning on Temperature Dynamics and Mountain Pine Beetle Activity in a Lodgepole Pine Stand written by Dale L. Bartos and published by . This book was released on 1994 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Preliminary Risk Rating for Mountain Pine Beetle Infestation of Lodgepole Pine Forests Over Large Areas with Ordinal Regression Modelling written by Colin Robertson and published by . This book was released on 2009 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: In western Canada, the operational risk rating system for mountain pine beetle is based on biological knowledge gained from a rich legacy of stand-scale field studies. Owing to the large spatial and temporal extents of the current epidemic, new research into large-area mountain pine beetle processes has revealed further insights into the landscape-scale characteristics of beetle infested forests. This research evaluates the potential for this new knowledge to augment an established system for rating the short-term risk of tree mortality in a stand due to mountain pine beetle.--Publisher's website.

Download or read book Ochoco National Forest N F and Crooked River National Grassland Proposed Land and Resource s Management Plan LRMP written by and published by . This book was released on 1989 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparison of Risk Hazard Rating Systems for Mountain Pine Beetle in Black Hills Ponderosa Pine Forests Classic Reprint written by Judith E. Pasek and published by Forgotten Books. This book was released on 2018-10-13 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Comparison of Risk/Hazard Rating Systems for Mountain Pine Beetle in Black Hills Ponderosa Pine Forests Stevens et al. (1980) described a system for rating ponderosa pine stands in the Black Hills for susceptibility to mountain pine beetle (mpb), Dendroctonus ponderosae Hopkins, using parameters of stand structure (one or two-storied), average diameter at breast height (deh), and average basal area (ba). This mpb risk-rating system was incorporated into a model subroutine called ponbug, which is linked to the Rocky Mountain Resource Inventory System (rmris) database used by National Forests in the Rocky Mountain Region, so that mpb risk could be automatically calculated in the program called rmstand. Results can be displayed in the optional field bug_risk in the table r2ris_site. Values of 1, 3, and 5 indicate low, medium, and high mpb stand risk, respectively. The program was modified in 1993 for the Black Hills and Nebraska National Forests based upon results of Schmid and Mata They suggested that 120 sq. Ft. Per acre may be the critical BA for separating high risk stands of susceptible-sized trees in the Black Hills, rather than 150 sq. Ft. Per acre. This risk-rating program is often used by district personnel during project planning to help prioritize pine stands for thinning or harvesting. As Rapid City Service Center staff became involved in assisting district personnel with analyses of mpb risk, it became apparent that the ponbug model did not always produce the same results as hand calculations of the method published by Stevens et al. Closer examination of the computer program ponbug revealed that it used average diameter and BA of trees 2 1 inch qmd (quadratic mean diameter, an estimate of average stand diameter) rather than those for trees 2 5 inches in diameter, as specified by Stevens et ai. In addition, Stevens et al. (1980) did not define one-storied and two storied stand structure in their rating system. In order to use the stand structure parameter in the ponbug model, a stand was designated as two-storied if BA of trees 2 1 inch qmd was 30 sq. Ft. Per acre and number of live trees between 1 and 5 inches qmd was 250 per acre. Stands without these conditions were designated as one-storied. By this method, most stands in the Black Hills would be designated as one-storied. Whether or not this is an accurate portrayal of stand structures of ponderosa pine in the Black Hills is debatable. The ponbug designations for stand structure may not represent what Stevens et al. (1980) envisioned when they described their rating system. The omission of trees smaller than 5 inches deh from their model suggests that they considered such small trees to be unimportant for risk rating mountain pine beetle susceptibility and may also reflect a scarcity of such trees in stands of high risk. Their two-storied stands were likely to contain scattered mature trees with an understory of pole-sized trees, typical of stands found some years following shelterwood or seed tree harvesting. A quantitative means of describing such stands for use in risk/hazard rating systems for mountain pine beetle in ponderosa pine has not been developed to date. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.