Mountain Pine Beetle Infestations in Relation to Lodgepole Pine Diameters PDF Download
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Author: Walter E. Cole
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 8
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Book Description
Tree losses resulting from infestation by the mountain pine beetle (Dendroctonus ponderosae Hopkins) were measured in two stands of lodgepole pine (Pinus contorta Dougl.) where the beetle population had previously been epidemic. Measurement data showed that larger diameter trees were infested and killed first. Tree losses ranged from 1 percent of trees 4 inches (d.b.h.) to 87 percent of those 16 inches and greater d.b.h. Numbers of adult beetle emergence holes averaged 1.3 per square foot of bark area in trees 7 inches d.b.h. and 62 in trees 28 inches and greater d.b.h. The observations indicate that large infestations of mountain pine beetle depend on the presence of large diameter trees within a stand of lodgepole pine, thus implying that beetle population growth is food-limited.
Author: Walter E. Cole
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 8
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Book Description
Tree losses resulting from infestation by the mountain pine beetle (Dendroctonus ponderosae Hopkins) were measured in two stands of lodgepole pine (Pinus contorta Dougl.) where the beetle population had previously been epidemic. Measurement data showed that larger diameter trees were infested and killed first. Tree losses ranged from 1 percent of trees 4 inches (d.b.h.) to 87 percent of those 16 inches and greater d.b.h. Numbers of adult beetle emergence holes averaged 1.3 per square foot of bark area in trees 7 inches d.b.h. and 62 in trees 28 inches and greater d.b.h. The observations indicate that large infestations of mountain pine beetle depend on the presence of large diameter trees within a stand of lodgepole pine, thus implying that beetle population growth is food-limited.
Author: Walter E. Cole
Publisher:
ISBN:
Category : Lodgepole pine
Languages : en
Pages : 52
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Book Description
Author: S. A. Mata
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 24
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Book Description
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
Author: Robert C. Thatcher
Publisher:
ISBN:
Category : Conifers
Languages : en
Pages : 296
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Author: Arthur Lawrence Roe
Publisher:
ISBN:
Category : Lodgepole pine
Languages : en
Pages : 23
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 140
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Book Description
Backpacker brings the outdoors straight to the reader's doorstep, inspiring and enabling them to go more places and enjoy nature more often. The authority on active adventure, Backpacker is the world's first GPS-enabled magazine, and the only magazine whose editors personally test the hiking trails, camping gear, and survival tips they publish. Backpacker's Editors' Choice Awards, an industry honor recognizing design, feature and product innovation, has become the gold standard against which all other outdoor-industry awards are measured.
Author: Reese Halter
Publisher: Rocky Mountain Books Ltd
ISBN: 1926855663
Category : Nature
Languages : en
Pages : 178
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Book Description
"In our ever-warming world, trillions of indigenous bark beetles are killing billions of mature conifers throughout the forests of western North America and around the world, as they embark on their largest and most destructive feeding frenzy in modern times. In areas where cold temperatures traditionally prevented these insects from thriving, our once-healthy but now water-starved trees are becoming more and more vulnerable to the voracious appetites of these destructive pests. With aspects of both our environment and the economy at stake, Dr. Reese Halter's second RMB Manifesto provides information on the various types of beetles negatively impacting trees, descriptions of the ecosystems they currently inhabit, and an accessible look at the future humanity may face if we do not find ways to control greenhouse gas emissions and climate change, which are contributing factors to the ongoing spread of bark beetles." -- Publisher.
Author: Walter E. Cole
Publisher:
ISBN:
Category : Lodgepole pine
Languages : en
Pages : 12
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Book Description
Author: Robert E. Keane
Publisher:
ISBN:
Category : Coarse woody debris
Languages : en
Pages : 50
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Book Description
Fire managers need better estimates of fuel loading so they can more accurately predict the potential fire behavior and effects of alternative fuel and ecosystem restoration treatments. This report presents a new fuel sampling method, called the photoload sampling technique, to quickly and accurately estimate loadings for six common surface fuel components (1 hr, 10 hr, 100 hr, and 1000 hr downed dead woody, shrub, and herbaceous fuels). This technique involves visually comparing fuel conditions in the field with photoload sequences to estimate fuel loadings. Photoload sequences are a series of downward-looking and close-up oblique photographs depicting a sequence of graduated fuel loadings of synthetic fuelbeds for each of the six fuel components. This report contains a set of photoload sequences that describe the range of fuel component loadings for common forest conditions in the northern Rocky Mountains of Montana, USA to estimate fuel loading in the field. A companion publication (RMRS-RP-61CD) details the methods used to create the photoload sequences and presents a comprehensive evaluation of the technique.
Author:
Publisher: Academic Press
ISBN: 0128027444
Category : Science
Languages : en
Pages : 332
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Book Description
Pine Bark Beetles, the latest release in the Advances in Insect Physiology series, provides readers with the latest interdisciplinary reviews on the topic. It is an essential reference source for invertebrate physiologists, neurobiologists, entomologists, zoologists, and insect chemists. - Contains important, comprehensive, and in-depth reviews on insect physiology - Provides an essential reference source for invertebrate physiologists and neurobiologists, entomologists, zoologists, and insect biochemists - First published in 1963, this serial is ranked second in the highly competitive ISI category of entomology
