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Articles 11401 - 11430 of 16981
Full-Text Articles in Entire DC Network
Behavior And Reproductive Success Of Rock Sandpipers Breeding On The Yukon-Kuskokwim River Delta, Alaska, Matthew Johnson, Jesse R. Conklin, Branden L. Johnson, Brian J. Mccaffery, Susan M. Haig, Jeffrey R. Walters
Behavior And Reproductive Success Of Rock Sandpipers Breeding On The Yukon-Kuskokwim River Delta, Alaska, Matthew Johnson, Jesse R. Conklin, Branden L. Johnson, Brian J. Mccaffery, Susan M. Haig, Jeffrey R. Walters
United States Geological Survey: Staff Publications
We studied Rock Sandpiper (Calidris ptilocnemis) breeding behavior and monitored reproductive success from 1998 to 2005 on the Yukon-Kuskokwim River Delta, Alaska, USA. We banded 24 adults and monitored 45 nests. Annual return rate of adults ranged between 67 and 100%. Six pairs of Rock Sandpipers bred at our study site for ≥ 2 years, and among these we did not observe mate change (i.e., when both members of a pair returned and each mated with a new individual). Nests were typically initiated by mid-May and 53% of females laid second clutches if first clutches were lost through …
Cahokia's Boom And Bust In The Context Of Climate Change, Larry Benson, Timothy R. Pauketat, Edward R. Cook
Cahokia's Boom And Bust In The Context Of Climate Change, Larry Benson, Timothy R. Pauketat, Edward R. Cook
United States Geological Survey: Staff Publications
During the early Mississippian Lohmann phase (A.D. 1050-1100), the American Bottom experienced a political and economic transformation. This transformation included the abrupt planned construction of central Cahokia, a large-scale influx of people to "downtown Cahokia," the abandonment of pre-Mississippian village settlements, the reorganization of farming in the Mississippi River floodplain, and the founding of the Richland farming complex in the Illinois uplands. New tree ring-based records of climate change indicate that this rapid development occurred during one of the wettest 50-year periods during the last millennium. During the next 150 years, a series of persistent droughts occurred in the Cahokian …
Migratory Patterns And Population Structure Among Breeding And Wintering Red-Breasted Mergansers (Mergus Serrator) And Common Mergansers (M. Merganser) Характер Миграций И Популяционная Структура У Mergus Serrator И M. Merganser Вместах Зимовок И Гнез Ований, John M. Pearce, Kevin G. Mccracken, Thomas K. Christensen, Yuri N. Zhuravlev
Migratory Patterns And Population Structure Among Breeding And Wintering Red-Breasted Mergansers (Mergus Serrator) And Common Mergansers (M. Merganser) Характер Миграций И Популяционная Структура У Mergus Serrator И M. Merganser Вместах Зимовок И Гнез Ований, John M. Pearce, Kevin G. Mccracken, Thomas K. Christensen, Yuri N. Zhuravlev
United States Geological Survey: Staff Publications
Philopatry has long been assumed to structure populations of waterfowl and other species of birds genetically, especially via maternally transmitted mitochondrial DNA (mtDNA), yet other migratory behaviors and nesting ecology (use of ground vs. cavity sites) may also contribute to population genetic structure. We investigated the effects of migration and nesting ecology on the population genetic structure of two Holarctic waterfowl, the Red-breasted Merganser (Mergus serrator) and Common Merganser (M. merganser), using mtDNA control-region sequence data. Red-breasted Mergansers (a ground-nesting species) exhibited lower levels of population differentiation across their North American range, possibly as a result of post-Pleistocene range expansion …
Acute Oral Toxicities Of Wildland Fire Control Chemicals To Birds, Nimish B. Vyas, James W. Spann, Elwood F. Hill
Acute Oral Toxicities Of Wildland Fire Control Chemicals To Birds, Nimish B. Vyas, James W. Spann, Elwood F. Hill
United States Geological Survey: Staff Publications
Wildland fire control chemicals are released into the environment by aerial and ground applications to manage rangeland, grassland, and forest fires. Acute oral 24 h median lethal dosages (LD50) for three fire retardants (Fire-Trol GTS-R™, Phos-Chek D-75F™, and Fire-Trol LCG-R™) and two Class A fire suppressant foams (Silv-Ex™ and Phos-Chek WD881™) were estimated for northern bobwhites, Colinus virginianus, American kestrels, Falco sparverius, and red-winged blackbirds, Agelaius phoeniceus. The LD50s of all chemicals for the bobwhites and red0winged blackbirds and for kestrels dosed with Phos-Chek WD881™ and Silv-Ex™ were above the predetermined 2000 mg chemical/kg body mass …
A Simplified Method For Extracting Androgens From Avian Egg Yolks, Corinne P. Kozlowski, Joan E. Bauman, D. Caldwell Hahn
A Simplified Method For Extracting Androgens From Avian Egg Yolks, Corinne P. Kozlowski, Joan E. Bauman, D. Caldwell Hahn
United States Geological Survey: Staff Publications
Female birds deposit significant amounts of steroid hormones into the yolks of their eggs. Studies have demonstrated that these hormones, particularly androgens, affect nestling growth and development. In order to measure androgen concentrations in avian egg yolks, most authors follow the extraction methods outlined by Schwabl (1993. Proc. Nat. Acad. Sci. USA 90:11446–11450). We describe a simplified method for extracting androgens from avian egg yolks. Our method, which has been validated through recovery and linearity experiments, consists of a single ethanol precipitation that produces substantially higher recoveries than those reported by Schwabl (1993. Proc. Nat. Acad. Sci. USA 90:11446–11450).
Effects Of Fire Temperature On The Physical And Chemical Characteristics Of The Ash From Two Plots Of Cork Oak (Quercus Suber), X. Ú Beda, P. Pereira, L. Outeiro, D. A. Martin
Effects Of Fire Temperature On The Physical And Chemical Characteristics Of The Ash From Two Plots Of Cork Oak (Quercus Suber), X. Ú Beda, P. Pereira, L. Outeiro, D. A. Martin
United States Geological Survey: Staff Publications
Cork oak, (Quercus suber) is widely distributed in the Mediterranean region, an area subject to frequent fires. The ash produced by burning can have impacts on the soil status and water resources that can differ according to the temperature reached during fire and the characteristics of the litter, defined as the dead organic matter accumulated on the soil surface prior to the fire. The aim of this work is to determine the physical and chemical characteristics of ash produced in laboratory experiments to approximate conditions typical of fires in this region. The litter of Quercus suber collected from …
Prom: A Semantic Web Framework For Provenance Management In Science, Satya S. Sahoo, Roger Barga, Amit P. Sheth, Krishnaprasad Thirunarayan, Pascal Hitzler
Prom: A Semantic Web Framework For Provenance Management In Science, Satya S. Sahoo, Roger Barga, Amit P. Sheth, Krishnaprasad Thirunarayan, Pascal Hitzler
Kno.e.sis Publications
The eScience paradigm is enabling researchers to collaborate over the Web in virtual laboratories and conduct experiments on an industrial scale. But, the inherent variability in the quality and trust associated with eScience resources necessitates the use of provenance information describing the origin of an entity. Existing systems often model provenance using ambiguous terminology, have poor domain semantics and include modeling inconsistencies that hinders interoperability. Further, mere collection of provenance information is of little value without a well-defined and scalable query mechanism.
In this paper, we present 'PrOM', a framework that addresses both the modeling and querying issues in eScience …
Chipless Rfid Sensor Tag System With Microstrip Transmissionline Based Id Generation Schemes, Sudhir Shrestha
Chipless Rfid Sensor Tag System With Microstrip Transmissionline Based Id Generation Schemes, Sudhir Shrestha
Doctoral Dissertations
This dissertation presents a chipless radio frequency identification (RFID) sensor tag system consisting of passive chipless RFID sensor tags and specialized reader. The chipless sensor tags are fabricated on a flexible substrate and contain an ID generation circuit, a sensor, and a microstrip antenna. The ID generation circuit consists of meandered microstrip transmission lines and uses a novel reflection and delay based ID generation scheme. The scheme, using an input RF pulse, constructs an on-off keying (OOK) or pulse position modulated (PPM) signal pattern representing a unique ID code. Two transmission lines and OOK representation are used and the generation …
Co 611 Dynamics Of Human Sexuality, Asbury Theological Seminary
Co 611 Dynamics Of Human Sexuality, Asbury Theological Seminary
Syllabi
Hyde, J. S. (2006). Understanding Human Sexuality, (9th Edition), Boston: McGraw Hill. (Chapters 1-12, and 20 required – other chapters recommended) Laaser, M. (2004). Healing the Wounds of Sexual Addiction. Grand Rapids, MI: Zondervan. Rosenau, D. (2002). A celebration of sex (Rev. and updated. ed.). Nashville: Thomas Nelson. Rosenau, D., & Wilson, M. T. (2006). Soul virgins : redefining single sexuality. Grand Rapids, Mich.: Baker Books. senau, D.E., Sytsma, M., and Taylor, D.L. (2001). Sexuality and Sexual Counseling: Learning and Practicing the DEC-R Model. In T. Clinton, and G. Ohlschlager (Eds.) Competent Christian Counseling, Colorado Springs: Waterbrook. hnarch, D. M. …
Proveris Scientific Corp. V. Innovasystems, Inc. Sinks Safe Harbor Protection For Research Tools, 8 J. Marshall Rev. Intell. Prop. L. 452 (2009), Erin M. Mckibben
Proveris Scientific Corp. V. Innovasystems, Inc. Sinks Safe Harbor Protection For Research Tools, 8 J. Marshall Rev. Intell. Prop. L. 452 (2009), Erin M. Mckibben
UIC Review of Intellectual Property Law
The use of research tools is critical for pharmaceutical companies to conduct timely and efficient research in the development of new drugs. Traditionally, the use of all patented inventions during drug development that are reasonably related to submission of information to the Food and Drug Administration for regulatory review has been protected under the section 271(e)(1) safe harbor provision. Recently, the Federal Circuit narrowed the scope of the safe harbor provision excluding the use of certain patented research tools. The effect of this decision on research tools may negatively impact the public by raising the cost of pharmaceutical companies’ research …
Experimental Infection Of Richardson’S Ground Squirrels (Spermophilus Richardsonii ) With Attenuated And Virulent Strains Pf Brucella Abortus, Pauline Nol, Steven C. Olsen, Jack C. Rhyan
Experimental Infection Of Richardson’S Ground Squirrels (Spermophilus Richardsonii ) With Attenuated And Virulent Strains Pf Brucella Abortus, Pauline Nol, Steven C. Olsen, Jack C. Rhyan
United States Department of Agriculture Wildlife Services: Staff Publications
A previous investigation of the safety of Brucella abortus strain RB51 (sRB51) in various nontarget species suggested that Richardson’s ground squirrels (Spermophilus richardsonii) may develop persistent infections when orally inoculated with the vaccine. In the present study, sRB51, B. abortus strain 19 (s19), and virulent B. abortus strain 9941 (s9941) were administered orally to Richardson’s ground squirrels to further characterize B. abortus infection in this species. Six groups of nongravid ground squirrels were orally inoculated with 6x108 colony forming units (cfu) sRB51 (n=10), 2.5x104 cfu s19 (n=10), 2.5x107 cfu s19 (n=6), 1.3x106 cfu s9941 …
Cloning And Expression Of Aquaporin In The Antennal Gland Of Crayfish, Procambarus Clarkii, Yang Gao
Cloning And Expression Of Aquaporin In The Antennal Gland Of Crayfish, Procambarus Clarkii, Yang Gao
Browse all Theses and Dissertations
Aquaporins (AQPs) are responsible for transferring water and other small molecules across the cell membrane. Relatively little research has been conducted on AQPs in crustaceans. To study the AQPs in crayfish, I hypothesis that 1) AQP is expressed in the antennal gland (kidney analogue) of crayfish; 2) crayfish AQP will show greater expression in tissues (gill and antennal gland) associated with volume regulation; 3) AQP mRNA expression in antennal gland and gill will increase in premolt and decrease in postmolt compared with intermolt level. RT-PCR and Real-time PCR assay were applied to test the hypothesis. A partial AQP gene was …
2009-2010 - Graduate Catalog, Office Of The Registrar, East Tennessee State University
2009-2010 - Graduate Catalog, Office Of The Registrar, East Tennessee State University
Graduate Academic Catalogs
No abstract provided.
A Comprehensive Guide To Fuel Management Practices For Dry Mixed Conifer Forests In The Northwestern United States, Theresa B. Jain, Michael Battaglia, Han-Sup Han, Russell T. Graham, Jeremy S. Fried, Christopher R. Keyes, Jonathan Sandquist
A Comprehensive Guide To Fuel Management Practices For Dry Mixed Conifer Forests In The Northwestern United States, Theresa B. Jain, Michael Battaglia, Han-Sup Han, Russell T. Graham, Jeremy S. Fried, Christopher R. Keyes, Jonathan Sandquist
Joint Fire Science Program Research Project Reports
This guide describes the benefits, opportunities, and trade-offs concerning fuel treatments in the dry mixed conifer forests of northern California and the Klamath Mountains, Pacific Northwest Interior, northern and central Rocky Mountains, and Utah. Multiple interacting disturbances and diverse physical settings have created a forest mosaic with historically low- to mixed-severity fire regimes. Analysis of forest inventory data found nearly 80 percent of these forests rate hazardous by at least one measure and 20 to 30 percent rate hazardous by multiple measures. Modeled mechanical treatments designed to mimic what is typically implemented, such as thinning, are effective on less than …
A Comparison Of Fire Severity Patterns In The Late 19th And Early 21st Century In A Mixed Conifer Forest Landscape In The Southern Cascades, Alan H. Taylor, Carl N. Skinner, Becky Estes
A Comparison Of Fire Severity Patterns In The Late 19th And Early 21st Century In A Mixed Conifer Forest Landscape In The Southern Cascades, Alan H. Taylor, Carl N. Skinner, Becky Estes
Joint Fire Science Program Research Project Reports
The extent and severity of fires in the United States during the last decade has been remarkable. Since 2002, there has been seven years (2002, 2004, 2005, 2006, 2007, 2011, 2012) when over 2.8 million ha have burned, more than twice the previous decade. The extent of recent fire activity has increased risks to lives and property (Cohen 2008; , biodiversity and species-at-risk (Spies et al. 2006), the timber value of forests (Butry et al. 2001) and forests as a carbon sink (Hurteau et al. 2008, 2011). Although one driver of the increase in fire extent, at least in western …
Validation Of Smoke Transport Models With Airborne And Lidar Experiments, Shawn P. Urbanski, Wei Min Hao, Vladimir Kovalev
Validation Of Smoke Transport Models With Airborne And Lidar Experiments, Shawn P. Urbanski, Wei Min Hao, Vladimir Kovalev
Joint Fire Science Program Research Project Reports
This document reports our success in achieving the objectives and accomplishing the deliverables proposed in the project “Validation of Smoke Transport Models with Airborne and Lidar Experiments”. This final report is divided into four sections. Section 1, the Background, describes the purpose of the project and summarizes the project objectives and how accomplishment of these objectives addresses the original research solicitation JFSP AFP-2008-1, Task 6. The Background section also provides relates the project purpose material on smoke dispersion and air quality forecasting systems. The goal of Section 2 is to illustrate how the accomplished tasks contribute towards the project objective …
A Synthesis Of Post-Fire Road Treatments For Baer Teams: Methods, Treatment Effectiveness, And Decisionmaking Tools For Rehabilitation, Randy B. Foltz, Peter R. Robiochaud, Hakjun Rhee
A Synthesis Of Post-Fire Road Treatments For Baer Teams: Methods, Treatment Effectiveness, And Decisionmaking Tools For Rehabilitation, Randy B. Foltz, Peter R. Robiochaud, Hakjun Rhee
Joint Fire Science Program Research Project Reports
We synthesized post-fire road treatment information to assist BAER specialists in making road rehabilitation decisions. We developed a questionnaire; conducted 30 interviews of BAER team engineers and hydrologists; acquired and analyzed gray literature and other relevant publications; and reviewed road rehabilitation procedures and analysis tools. Post-fire road treatments are implemented if the values at risk warrant the treatment and based on regional characteristics, including the timing of first damaging storm and window of implementation. Post-fire peak flow estimation is important when selecting road treatments. Interview results indicate that USGS methods are used for larger watersheds (>5 mi2) and NRCS …
Creating Stand-Level Prescriptions That Integrate Ecological And Fuel Management Objectives Across The Eastern Cascades – A Workshop, John F. Lehmkuhl, Sue Livingston, Karl Halupka, Eric Knapp, John Bailey, Bill Gaines
Creating Stand-Level Prescriptions That Integrate Ecological And Fuel Management Objectives Across The Eastern Cascades – A Workshop, John F. Lehmkuhl, Sue Livingston, Karl Halupka, Eric Knapp, John Bailey, Bill Gaines
Joint Fire Science Program Research Project Reports
The primary goal of this workshop was to develop a range of fuel reduction prescriptions that integrate fuel and ecological objectives specifically related to northern spotted owl (NSO) conservation in dry forests of the Cascade Range in eastern Washington and Oregon and northern California. The workshop was held at the Eagle Crest Resort, Redmond, Oregon, from October 13-15, 2009. Over 200 managers and scientists attended from California, Oregon, and Washington. Most (82%) of the 194 people who formally registered for the workshop worked for federal land management, research, or regulatory agencies. The rest were a mix of university faculty and …
Characterizing Lessons Learned From Federal Biomass Removal Projects, Dennia R. Becker, Dalia Abbas, Kathleen E. Halvorsen, Pamela J. Jakes, Sarah M. Mccaffrey, Cassandra Moseley
Characterizing Lessons Learned From Federal Biomass Removal Projects, Dennia R. Becker, Dalia Abbas, Kathleen E. Halvorsen, Pamela J. Jakes, Sarah M. Mccaffrey, Cassandra Moseley
Joint Fire Science Program Research Project Reports
The idea of offsetting the costs of wildfire hazardous fuels reduction treatments by selling the biomass removed is appealing. There are however challenges to biomass utilization that impedes progress. For instance, the lack of biomass processing capacity may impede progress in some regions, while in other regions an inconsistent supply of biomass available for wood products markets limits private investment. Despite efforts to increase biomass utilization, uncertainty exists of regarding the characteristics necessary to stimulate biomass utilization, effectiveness of agency and local efforts, and the role of partnerships in building the types of capacity necessary to expedite biomass removal. The …
Delivery And Demonstration Of Surface Wind Simulation Tool For Fire Management Decision Support, Mark Finney, Larry Bradshaw, Bret Butler
Delivery And Demonstration Of Surface Wind Simulation Tool For Fire Management Decision Support, Mark Finney, Larry Bradshaw, Bret Butler
Joint Fire Science Program Research Project Reports
One major source of uncertainty in fire behavior predictions is the spatial variation in winds blowing over mountainous terrain. Fire managers have not had access to “real time” predictions of surface wind flow. With the generous support of the JFSP and additional funding from several USDA Forest Service sources a wind simulation tool has been developed and tested. This project had three primary objectives: 1. Support wildland fire incident management teams with surface wind flow simulations. 2. Validate, improve and document the utility of gridded wind as a fire management decision support tool. 3. Produce technical documentation, including a user’s …
Development And Delivery Of Version 2 Of The Fire And Fuels Extension To The Forest Vegetation Simulator, Nicholas Crookston, Stephanie Rebain, Elizabeth Reinhardt, Gary Dixon
Development And Delivery Of Version 2 Of The Fire And Fuels Extension To The Forest Vegetation Simulator, Nicholas Crookston, Stephanie Rebain, Elizabeth Reinhardt, Gary Dixon
Joint Fire Science Program Research Project Reports
This project provided for an improved version of the Fire and Fuels Extension to the Forest Vegetation Simulator (FFE-FVS), a program whose original development was largely financed by the JFSP. The program is widely used by JFSP member agencies and several JFSP-sponsored research projects to support analysis at the stand to large landscape spatial scales. New research results rendered version 1 obsolete and experience with the model demonstrated that some parts of it needed to be improved. Equally important are issues regarding support, training, and system usability. We conducted 42 on-site training sessions over the last 4 years and also …
Does Prescribed Burning In Southern Forests Release Significant Amounts Of Mercury To The Atmosphere?, Thomas A. Waldrop, Mac A. Callahn, John A. Stanturf
Does Prescribed Burning In Southern Forests Release Significant Amounts Of Mercury To The Atmosphere?, Thomas A. Waldrop, Mac A. Callahn, John A. Stanturf
Joint Fire Science Program Research Project Reports
Mercury (Hg) emissions from prescribed fire present a potential impact on air quality that could motivate regulators to further restrict prescribed burning. Atmospheric deposition of Hg (originating from industrial sources) to forests is well documented, and the prescribed burning of two to four million acres per year in the South recycles an unknown (but potentially significant) amount of Hg into the atmosphere and surface waters by volatilization and post-fire runoff. This and other environmental concerns present a significant challenge to local land managers who use prescribed fire. Our objectives were (1) to estimate local and South-wide emission of Hg due …
Effect Of Mechanical Mastication Followed By Prescribed Fire On Mycorrhizas And Hypogeous Fungi In Mixed Hardwood Chaparral, Darlene Southworth, Jennifer Gibson, Jessica Donohue, Jonathan Frank, Kate Wagner, Jason Lambert, Acacia Baldner
Effect Of Mechanical Mastication Followed By Prescribed Fire On Mycorrhizas And Hypogeous Fungi In Mixed Hardwood Chaparral, Darlene Southworth, Jennifer Gibson, Jessica Donohue, Jonathan Frank, Kate Wagner, Jason Lambert, Acacia Baldner
Joint Fire Science Program Research Project Reports
The purpose of this study was to examine the effects of mechanical mastication followed by prescribed fire on mycorrhizal fungi and hypogeous sporocarps. A dense fire-prone mixed hardwood-conifer chaparral comprises a significant component of vegetation at Whiskeytown National Recreation Area. Prescribed burns, as fuel reduction treatments, are limited by air quality restrictions and narrow climatic conditions appropriate for burnings. Brush mastication is a fast and inexpensive tool commonly used by land managers to reduce ladder fuels. However, a dense layer of chipped debris remains, which, when burned, heats the soil more than ladder fuels. The upper layers of mineral soil …
Synthesis Of Knowledge On The Effects Of Fire And Thinning Treatments On Understory Vegetation In U.S. Dry Forests, Anne M. Bartuszevige, Patricia L. Kennedy
Synthesis Of Knowledge On The Effects Of Fire And Thinning Treatments On Understory Vegetation In U.S. Dry Forests, Anne M. Bartuszevige, Patricia L. Kennedy
Joint Fire Science Program Research Project Reports
A century of fire exclusion in dry forests across the United States has resulted in high fuel loads and increasing dominance by fire-intolerant vegetation. Federal, state, and private agencies have adopted a goal of managing forests to reduce the risk of high-severity wildfire. Forest managers use a variety of tools to create desired conditions within forests; the most common are prescribed fire and mechanical thinning. These two treatments may be used separately or in combination, depending on restoration goals for the forest stand. Before these treatments can be applied, managers must justify their choice by documenting the effects of the …
Synthesis Of Knowledge On The Effects Of Fire And Fire Surrogates On Wildlife In U.S. Dry Forests, Patricia L. Kennedy, Joseph B. Fontaine
Synthesis Of Knowledge On The Effects Of Fire And Fire Surrogates On Wildlife In U.S. Dry Forests, Patricia L. Kennedy, Joseph B. Fontaine
Joint Fire Science Program Research Project Reports
Dry forests throughout the United States are fire-dependent ecosystems, and much attention has been given to restoring their ecological function. As such, land managers often are tasked with reintroducing fire via prescribed fire, wildland fire use, and fire-surrogate treatments such as thinning and mastication. During planning, managers frequently are expected to anticipate effects of management actions on wildlife species. This document represents a synthesis of existing knowledge on wildlife responses to fire and fire-surrogate treatments, presented in a useful, management-relevant format. Based on scoping meetings and dialogue with public lands managers from throughout the United States, we provide detailed, species-level, …
Effects Of Prescribed Fire On Biological Soil Crusts And Their Subsequent Recovery In A Great Basin Juniper Woodland, Steven D. Warren, Larry L. St.Clair, Jeffrey R. Johansen, Paul Kugrens
Effects Of Prescribed Fire On Biological Soil Crusts And Their Subsequent Recovery In A Great Basin Juniper Woodland, Steven D. Warren, Larry L. St.Clair, Jeffrey R. Johansen, Paul Kugrens
Joint Fire Science Program Research Project Reports
A prescribed burn was conducted in a juniper woodland approximately 40 km south of Tooele, Utah on 05 October 2006. Conditions were sub-optimal, and the fire did not encroach into mid- or late-successional areas; only the early-successional area burned successfully. This study evaluated the effects of the prescribed burn on biological soil crusts that occupy the soil surface and are important for soil stability, soil nutrient cycling, and the germination and survival of vascular plants. Biological soil crusts are composed primarily of cyanobacteria, green algae, lichens and mosses. Mosses were rare under juniper trees, so the effects of the fire …
Effects Of Fuels/Fire Risk Reduction Treatments Using Hydro-Mow Or Thinning On Pinyon-Juniper Ecosystem Components Within The Wildland-Urbaninterface., Gerard J. Gottfried, Steven T. Overby, Philip A. Kemp, Cara Macmillan
Effects Of Fuels/Fire Risk Reduction Treatments Using Hydro-Mow Or Thinning On Pinyon-Juniper Ecosystem Components Within The Wildland-Urbaninterface., Gerard J. Gottfried, Steven T. Overby, Philip A. Kemp, Cara Macmillan
Joint Fire Science Program Research Project Reports
Pinyon-juniper woodlands are a dominant vegetation type throughout the Interior West on lands managed by the U.S. Forest Service and the USDI Bureau of Land Management. The woodlands have traditionally been viewed as having a low risk of wildfires because of the lack of a continuous and dense ground cover and low tree stand densities. However, stand densities are often high and are increasing in many areas and wildfires, often resulting in loss of lives and property, will occur under conditions of low humidity, high temperatures and wind speeds, and an ignition source. Woodlands commonly surround or are adjacent to …
Ecological Effects Of Prescribed Fire Season: A Literature Review And Synthesis For Managers, Eric Knapp, Becky Estes, Carl N. Skinner
Ecological Effects Of Prescribed Fire Season: A Literature Review And Synthesis For Managers, Eric Knapp, Becky Estes, Carl N. Skinner
Joint Fire Science Program Research Project Reports
Prescribed burning may be conducted at times of the year when fires were infrequent historically, leading to concerns about potential adverse effects on vegetation and wildlife. Historical and prescribed fire regimes for different regions in the continental United States were compared and literature on season of prescribed burning synthesized. In regions and vegetation types where considerable differences in fuel consumption exist among burning seasons, the effects of prescribed fire season appears, for many ecological variables, to be driven more by fire-intensity differences among seasons than by phenology or growth stage of organisms at the time of fire. Where fuel consumption …
Epidemic Southern Pine Beetle Attacks: A Problem Of Fuel-Loading Or An Opportunity For Management?, Thomas A. Waldrop, G. Geoffrey Wang, Knight Cox
Epidemic Southern Pine Beetle Attacks: A Problem Of Fuel-Loading Or An Opportunity For Management?, Thomas A. Waldrop, G. Geoffrey Wang, Knight Cox
Joint Fire Science Program Research Project Reports
The Piedmont Region of South Carolina experienced one of the heaviest attacks of southern pine beetle (Dendroctonus frontalis Zimm.) in history during the early part of this decade. Managers with both commercial objectives and restoration objectives needed information on how prescribed burning or mechanical treatments can be used to reduce the heavy fuels resulting from these attacks, without neglecting their primary management objectives. Prescribed burning is of concern because intensities are expected to be high and fires may damage soils, neighboring trees, or target vegetation. Methods of predicting fire behavior and fuel consumption are unavailable. Mechanical treatments will reduce fuels …
Estimating Canopy Fuels And Their Impact On Potential Fire Behavior For Ponderosa Pine In The Black Hills, South Dakota., Frederick W. Smith, Tara Keyser, Wayne Shepperd
Estimating Canopy Fuels And Their Impact On Potential Fire Behavior For Ponderosa Pine In The Black Hills, South Dakota., Frederick W. Smith, Tara Keyser, Wayne Shepperd
Joint Fire Science Program Research Project Reports
We evaluate whether current procedures used in fire behavior prediction models such as FVS-FFE provide predictions of CBD and CBH suitable for evaluating fire behavior in response to fuel treatments. Currently, FFE-FVS uses a geographic non-specific set of tree allometries and assumes a uniform distribution of crown mass when estimating CBH and CBD. We develop allometric equations to predict crown mass specific to ponderosa pine in the Black Hills (Pinus ponderosa Dougl. ex Laws.) from a sample of 80 felled trees in 16 forest stands spanning a wide range in tree size and stand. We develop a non-uniform description of …