Salvage Harvest Effects on Advance Tree Regeneration, Soil Nitrogen, and Fuels Following Mountain Pine Beetle Outbreak in Lodgepole Pine PDF Download
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Author: Jacob M. Griffin
Publisher:
ISBN:
Category : Fire
Languages : en
Pages : 12
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Book Description
The extent and severity of recent native bark beetle (Dendroctonae) outbreaks in western North America have created a pressing need for forest managers to understand potential consequences of post-disturbance management. For example, post-outbreak timber harvest (i.e., salvage harvest) could alter future forest development, productivity and susceptibility to subsequent disturbance. To assess the potential for such consequences, we measured first-year effects of post-outbreak timber harvest on tree regeneration, soil nitrogen (N) availability and fuels by using a paired and replicated before?after-control-impact (BACI) experimental design with eight pairs of 0.25-ha plots in beetle-killed lodgepole pine (Pinus contorta var. latifolia) in Greater Yellowstone (Wyoming, USA). Post-outbreak timber harvest reduced total (live + dead) lodgepole pine basal area by 90%. Total sapling density (advance regeneration) declined by about 50% following harvest, with tall (30?140 cm) saplings declining most, but mean post-harvest sapling density still exceeded 1600 stems ha^?1. Relative species density was unaffected and remained dominated by lodgepole pine. Soil temperature at the litter?soil interface was warmer during summer in harvested stands, and soil View the MathML source concentration increased with harvest relative to untreated plots. Soil View the MathML source concentration and resin bag N accumulation increased through time in all beetle-killed plots and were not affected by harvest. Following harvest, dead woody surface fuels in all size categories doubled, and canopy fuel load and canopy bulk density both were reduced; dead fuel depth, duff depth, and canopy base height did not differ between untreated and harvested plots. Harvest did reduce canopy fuels, but the natural progression of needle shedding after beetle-kill accounted for 25?40% of this total canopy fuel reduction. Salvage harvest seems unlikely to alter post-outbreak successional trajectories in these lodgepole pine forests. However, the altered fuel complex (immediate increase in dead woody surface fuels and expected long-term reduction in large-diameter fuels) in harvested plots could cause subsequent fire behavior and effects to differ between harvested and untreated stands.
Author: Jacob M. Griffin
Publisher:
ISBN:
Category : Fire
Languages : en
Pages : 12
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Book Description
The extent and severity of recent native bark beetle (Dendroctonae) outbreaks in western North America have created a pressing need for forest managers to understand potential consequences of post-disturbance management. For example, post-outbreak timber harvest (i.e., salvage harvest) could alter future forest development, productivity and susceptibility to subsequent disturbance. To assess the potential for such consequences, we measured first-year effects of post-outbreak timber harvest on tree regeneration, soil nitrogen (N) availability and fuels by using a paired and replicated before?after-control-impact (BACI) experimental design with eight pairs of 0.25-ha plots in beetle-killed lodgepole pine (Pinus contorta var. latifolia) in Greater Yellowstone (Wyoming, USA). Post-outbreak timber harvest reduced total (live + dead) lodgepole pine basal area by 90%. Total sapling density (advance regeneration) declined by about 50% following harvest, with tall (30?140 cm) saplings declining most, but mean post-harvest sapling density still exceeded 1600 stems ha^?1. Relative species density was unaffected and remained dominated by lodgepole pine. Soil temperature at the litter?soil interface was warmer during summer in harvested stands, and soil View the MathML source concentration increased with harvest relative to untreated plots. Soil View the MathML source concentration and resin bag N accumulation increased through time in all beetle-killed plots and were not affected by harvest. Following harvest, dead woody surface fuels in all size categories doubled, and canopy fuel load and canopy bulk density both were reduced; dead fuel depth, duff depth, and canopy base height did not differ between untreated and harvested plots. Harvest did reduce canopy fuels, but the natural progression of needle shedding after beetle-kill accounted for 25?40% of this total canopy fuel reduction. Salvage harvest seems unlikely to alter post-outbreak successional trajectories in these lodgepole pine forests. However, the altered fuel complex (immediate increase in dead woody surface fuels and expected long-term reduction in large-diameter fuels) in harvested plots could cause subsequent fire behavior and effects to differ between harvested and untreated stands.
Author: Marc-André Parisien
Publisher: MDPI
ISBN: 3038970999
Category : Electronic books
Languages : en
Pages : 342
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Book Description
This book is a printed edition of the Special Issue "Wildland Fire, Forest Dynamics, and Their Interactions" that was published in Forests
Author: Paulo Pereira
Publisher: CSIRO PUBLISHING
ISBN: 1486308155
Category : Science
Languages : en
Pages : 400
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Book Description
Wildland fires are occurring more frequently and affecting more of Earth's surface than ever before. These fires affect the properties of soils and the processes by which they form, but the nature of these impacts has not been well understood. Given that healthy soil is necessary to sustain biodiversity, ecosystems and agriculture, the impact of fire on soil is a vital field of research. Fire Effects on Soil Properties brings together current research on the effects of fire on the physical, biological and chemical properties of soil. Written by over 60 international experts in the field, it includes examples from fire-prone areas across the world, dealing with ash, meso and macrofauna, smouldering fires, recurrent fires and management of fire-affected soils. It also describes current best practice methodologies for research and monitoring of fire effects and new methodologies for future research. This is the first time information on this topic has been presented in a single volume and the book will be an important reference for students, practitioners, managers and academics interested in the effects of fire on ecosystems, including soil scientists, geologists, forestry researchers and environmentalists.
Author: Steven R. Beissinger
Publisher: University of Chicago Press
ISBN: 022642300X
Category : Nature
Languages : en
Pages : 455
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Book Description
Papers from a summit, "Science for Parks, Parks for Science: the next century," organized by University of California, Berkeley, in partnership with the National Geographic Society and the National Park Service and held 25-27 March 2015 at the University of California, Berkeley.
Author: Sergey Govorushko
Publisher: CRC Press
ISBN: 1351646222
Category : Medical
Languages : en
Pages : 582
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Book Description
This book presents a 360-degree picture of the world of insects and explores how their existence affects our lives: the "good, bad, and ugly" aspects of their interactions with humankind. It provides a lucid introductory text for beginning undergraduate students in the life sciences, particularly those pursuing beginner courses in entomology, agriculture, and botany.
Author: Gary Austin
Publisher: Routledge
ISBN: 1317931769
Category : Architecture
Languages : en
Pages : 273
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Book Description
Green infrastructure integrates human and natural systems through a network of corridors and spaces in mixed-use and urban settings. Austin takes a broad look at green infrastructure concepts, research and case studies to provide the student and professional with processes, criteria and data to support planning, design and implementation. Key topics of the book include: The benefits of green infrastructure as a conservation and planning tool Requirements of ecosystem health Green infrastructure ecosystem services that contribute to human physical and psychological health Planning processes leading to robust green infrastructure networks Design of green infrastructure elements for multiple uses. The concept of ecosystem services is extensively developed in this book, including biological treatment of stormwater and wastewater, opportunities for recreation, urban agriculture and emersion in a naturalistic setting. It defines planning and design processes as well as the political and economic facets of envisioning, funding and implementing green infrastructure networks. The book differs from others on the market by presenting the technical issues, requirements and performance of green infrastructure elements, along with the more traditional recreation and wildlife needs associated with greenway planning, providing information derived from environmental engineering to guide planners and landscape architects.
Author: Paul Robert Hood
Publisher:
ISBN: 9781369234237
Category : Ecological disturbances
Languages : en
Pages : 39
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Book Description
Throughout the Rocky Mountain region, recent infestations by the mountain pine beetle (Dendroctonus ponderosae; MPB) have caused widespread tree mortality and accumulation of dead, woody fuels. As forest management strategies are implemented to reduce the increase in surface fuel loads and salvage harvest of standing dead for use as lumber or biofuels, an understanding of the impacts of such actions is critical for making sound management decisions. To quantify how harvesting MPB-killed forest may affect fuel loads and fuel moisture content (FMC), we compared two types of salvage harvest - biomass removal and retention - and untreated lodgepole pine (Pinus contorta , LPP) forest, approximately 10 years post MPB epidemic, in the Colorado State Forest located in north-central Colorado. Fuel loads measurements were collected across three treatments in 10 experimental blocks. Each block compared biomass removal and biomass retention harvests with untreated MPB-killed forest. To determine whether surface woody fuels FMC differed between untreated MPB and harvested stands, three FMC stations were constructed at each of the 30 plots within the 10 block design. FMC stations consisted of recently harvested fuels in each fuel moisture time-lag class (1, 10, 100, 1000-hour). Each FMC station was measured weekly from late-May until mid-October and fuel moisture was calculated as the percentage of dry biomass. Additionally, 10 weather stations, five in treated and five in untreated forest, were deployed to detect differences in microclimate between treated and untreated stands. Biomass retention harvest resulted in a 30% increase in surface fuels overall with 3x greater coarse fuels (1000hr) and ~1.5x greater activity fuels (1 & 10hr) than biomass removal harvests. Both harvest methods resulted in 2x more activity fuels than untreated plots. Harvesting resulted in significantly lower FMC in 1-, 10-, 100- and 1000-hour fuels. 10-, 100- and 1000-hour fuels in treated plots dropped below the moisture of extinction (25% FMC) much earlier in the sampling period, and the 100- and 1000- hours fuels remained lower than the moisture of extinction for a greater amount of the sampling season. Litter/duff temperature and wind speed were found to be significantly greater in treated plots and precipitation was found to have the greatest effect on FMC in untreated plots. Managers should be cautioned that treated areas may exhibit increased fuels loads, lower FMC earlier in the year and contain less moisture throughout the fire season that may result in increased fire behavior and effects. If managers are seeking a treatment that is exclusively intended for ease of wildfire suppression, biomass removal should be the most successful in achieving their objectives.
Author: Pacific Forestry Centre
Publisher:
ISBN: 9780662426233
Category : Forest management
Languages : en
Pages : 304
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Book Description
"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.
Author: Matthew D. Klingenberg
Publisher:
ISBN:
Category : Lodgepole pine
Languages : en
Pages : 0
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Book Description
A concern to reforestation efforts following the recent outbreak of mountain pine beetle, Dendroctonus ponderosae Hopkins, is the migration of the below-ground herbivore Warren root collar weevil, Hylobius warreni Wood, from stands with a high percentage (>80%) of mature, dead lodgepole pine, Pinus contorta var latifolia Dougl. ex. Loud., into adjacent young, replanted stands, resulting in significant levels of mortality to juvenile trees. The effects of the spatial patterns of salvage harvesting following outbreaks of mountain pine beetle on the development of Warren root collar weevil pressure in neighbouring, regenerating stands was examined in young lodgepole pine stands in the central interior of British Columbia, Canada. Gradients of tree mortality caused by feeding of Warren root collar weevils were observed and found to be dependent on characteristics of the adjacent, unsalvaged stands. Mortality was exacerbated by high components of dead pine in these stands, and became worse over time. To investigate whether reduced host availability is a potential causal factor explaining such patterns, I constructed three research plots consisting of combinations of live tree, dead tree and mixed (i.e., live and dead) tree habitats and observed dispersal patterns of labeled insects. Weevils were more likely to be captured close to the release location in the mixed and live habitats vs. the dead habitat. Movement rate was high in the dead habitat compared with the live and mixed habitats. In the plot with the dead habitat adjacent to the location of release, the probability of capture was lower, but movement rate and dispersal distance were greater, indicating that Warren root collar weevils will disperse out of a habitat with dead trees into a habitat with live trees. Implications to reforestation strategies following savage harvesting are discussed.--P.ii.
Author: Sarah Boon
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 38
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Book Description
"This study examines the impact of mountain pine beetle infestation on forest canopy structure on the Nechako Plateau, and the resulting impacts on snow accumulation and ablation under varied climatic conditions. Stand-scale results were used to drive a physically-based, distributed hydrological model of the Van Tine Creek watershed and assess watershed-scale hydrologic response to four harvesting/infestation scenarios."--Document.
