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Articles 31 - 60 of 376
Full-Text Articles in Forest Sciences
Recombinant Dna Modification Of Gibberellin Metabolism Alters Growth Rate And Biomass Allocation In Populus, Haiwei Lu, Venkatesh Viswanath, Cathleen Ma, Elizabeth Etherington, Palitha Dharmawardhana, Olga Shevchenko, Steven H. Strauss, David W. Pearce, Stewart B. Rood, Victor Busov
Recombinant Dna Modification Of Gibberellin Metabolism Alters Growth Rate And Biomass Allocation In Populus, Haiwei Lu, Venkatesh Viswanath, Cathleen Ma, Elizabeth Etherington, Palitha Dharmawardhana, Olga Shevchenko, Steven H. Strauss, David W. Pearce, Stewart B. Rood, Victor Busov
Michigan Tech Publications
Overexpression of genes that modify gibberellin (GA) metabolism and signaling have been previously shown to produce trees with improved biomass production but highly disturbed development. To examine if more subtle types of genetic modification of GA could improve growth rate and modify tree architecture, we transformed a model poplar genotype (Populus tremula × P. alba) with eight genes, including two cisgenes (intact copies of native genes), four intragenes (modified copies of native genes), and two transgenes (from sexually incompatible species), and studied their effects under greenhouse and field conditions. In the greenhouse, four out of the eight tested genes produced …
Smokejumper Obituary: Blowers, James E. (Missoula 1946), National Smokejumper Association
Smokejumper Obituary: Blowers, James E. (Missoula 1946), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Robust Modeling And Predictions Of Greenhouse Gas Fluxes From Forest And Wetland Ecosystems, Khandker S. Ishtiaq
Robust Modeling And Predictions Of Greenhouse Gas Fluxes From Forest And Wetland Ecosystems, Khandker S. Ishtiaq
FIU Electronic Theses and Dissertations
The land-atmospheric exchanges of carbon dioxide (CO2) and methane (CH4) are major drivers of global warming and climatic changes. The greenhouse gas (GHG) fluxes indicate the dynamics and potential storage of carbon in terrestrial and wetland ecosystems. Appropriate modeling and prediction tools can provide a quantitative understanding and valuable insights into the ecosystem carbon dynamics, while aiding the development of engineering and management strategies to limit emissions of GHGs and enhance carbon sequestration. This dissertation focuses on the development of data-analytics tools and engineering models by employing a range of empirical and semi-mechanistic approaches to robustly …
Smokejumper Obituary: Wiltse, Stephen H. (Missoula 1959), National Smokejumper Association
Smokejumper Obituary: Wiltse, Stephen H. (Missoula 1959), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
The Effect Of Disturbance And Freshwater Availability On Lower Florida Keys’ Coastal Forest Dynamics, Danielle E. Ogurcak
The Effect Of Disturbance And Freshwater Availability On Lower Florida Keys’ Coastal Forest Dynamics, Danielle E. Ogurcak
FIU Electronic Theses and Dissertations
Coastal forest retreat in the Florida Keys during the 20th century has been attributed to a combination of sea level rise and hurricane storm surge impacts, but the interactions between these two disturbances leading to forest decline are not well understood. The goal of my research was to assess their effects over a period spanning more than two decades, and to examine the relationships between these press and pulse disturbances and freshwater availability in pine rockland, hardwood hammock, and supratidal scrub communities. Impacts and recovery from two storm surges, Hurricanes Georges (1998) and Wilma (2005), were assessed with satellite-derived …
Smokejumper Obituary: Martin, Robert L. (Missoula 1941), National Smokejumper Association
Smokejumper Obituary: Martin, Robert L. (Missoula 1941), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Ward, James O. (Missoula 1946), National Smokejumper Association
Smokejumper Obituary: Ward, James O. (Missoula 1946), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Timber Talk, Vol. 53, No .4, November 2015
Timber Talk, Vol. 53, No .4, November 2015
Timber Talk: Nebraska Forest Industry Newsletter
In This Issue
Lumber Market News ...........................1
Hardwood Lumber Price Trends—Green..................................2
Hardwood Lumber Price Trends—Kiln Dried...........................2
Sun-dried Lumber.................................3
NFS Forest Products Program...............4
Milling Railroad Ties in Nebraska........4
A Closer Look at Edgers........................5
Nebraska Forest Industry Spotlight......7
The Trading Post....................................8
Quantifying The Effects Of Biomass Market Conditions And Policy Incentives On Economically Feasible Sites To Establish Dedicated Energy Crops, Sandhya Nepal, Marco A. Contreras, George A. Stainback, John M. Lhotka
Quantifying The Effects Of Biomass Market Conditions And Policy Incentives On Economically Feasible Sites To Establish Dedicated Energy Crops, Sandhya Nepal, Marco A. Contreras, George A. Stainback, John M. Lhotka
Forestry and Natural Resources Faculty Publications
This study used a spatially-explicit model to identify the amount and spatial distribution of economically feasible sites for establishing dedicated energy crops under various market and policy scenarios. A sensitivity analysis was performed for a biomass market with different discount rates and biomass prices as well as policy scenarios including propriety tax exemption, carbon offset payments, and the inclusion of farmland for biomass production. The model was applied to a four-county study area in Kentucky representing conditions commonly found in the Ohio River Valley. Results showed that both biomass price and discount rate have a can strongly influence the amount …
National Smokejumper Assocation Trail Maintenance Annual Report For 2015, National Smokejumper Association Trails Committee
National Smokejumper Assocation Trail Maintenance Annual Report For 2015, National Smokejumper Association Trails Committee
Trails Reports
The Trails Maintenance Program Annual Reports compiled by the National Smokejumper Association Trails Committee summarizes the activities of the Trails Program. The members of the program also go by the title Trails Restoration and Maintenance Project Specialists (TRAMPS). The contents of the 2011 report include: Volunteer of the Year; Administration Report; Johnson's Corner report; Baldy Cabin Restoration; Big Sand Lake; Bear Creek; Bighorn Crag Trail; Hogan's Cabin; Losh Trail; Mann Gulch; Reece Cabin; Rio Medio Trail; Priest River; Sabido Cabin; Caldwell Lakes Trail; Dixie; Minnesota Wilderness Canoe; Bowery Guard Station #1; Bowery Guard Station #2; Prairie & Goat Cr. Trails; …
Mcicsl Newsletter - November 2015, Shannon R. Trimboli Education Coordinator
Mcicsl Newsletter - November 2015, Shannon R. Trimboli Education Coordinator
MCICSL Newsletter
This issue includes the following:
Partners Recognized for Water Quality Research at Mammoth Cave National Park and Increasing Diversity in the Geosciences
Texas A&M – Galveston Students Participate in Citizen Science at Mammoth Cave National Park
Northern Kentucky University and the Mammoth Cave International Center for Science and Learning to Host Partners in the Parks Program at Mammoth Cave National Park
as well as education and research highlights, and MCICSL symposium information
Spatial Aspects Of Tree Mortality Strongly Differ Between Young And Old-Growth Forests, Andrew J. Larson, James A. Lutz, Daniel C. Donato, James A. Freund, Mark E. Swanson, Janneke Hillrislambers, Douglas G. Sprugel, Jerry F. Franklin
Spatial Aspects Of Tree Mortality Strongly Differ Between Young And Old-Growth Forests, Andrew J. Larson, James A. Lutz, Daniel C. Donato, James A. Freund, Mark E. Swanson, Janneke Hillrislambers, Douglas G. Sprugel, Jerry F. Franklin
Forest Management Faculty Publications
Rates and spatial patterns of tree mortality are predicted to change during forest structural development. In young forests, mortality should be primarily density dependent due to competition for light, leading to an increasingly spatially uniform pattern of surviving trees. In contrast, mortality in old-growth forests should be primarily caused by contagious and spatially auto-correlated agents (e.g., insects, wind), causing spatial aggregation of surviving trees to increase through time. We tested these predictions by contrasting a three-decade record of tree mortality from replicated mapped permanent plots located in young (<60-year-old) and old-growth (>300-year-old) Abies amabilis forests. Trees in young forests died at a …60-year-old)>
Korbel Sawmill Report, Susie Van Kirk
Smokejumper Obituary: Dickey, Ward Eugene (Mccall 1954), National Smokejumper Association
Smokejumper Obituary: Dickey, Ward Eugene (Mccall 1954), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
West Chester University Emerald Ash Borer Plan, West Chester, Pa, Kendra Mcmillin, Gerard D. Hertel
West Chester University Emerald Ash Borer Plan, West Chester, Pa, Kendra Mcmillin, Gerard D. Hertel
WCU Tree Campus USA Documents
No abstract provided.
Meeting Minutes, October 7th, 2015, National Smokejumper Association Board Of Directors
Meeting Minutes, October 7th, 2015, National Smokejumper Association Board Of Directors
National Smokejumper Association Meeting Minutes
Agenda: Call to order, introduction to site, introductions, approval of the agenda.; Approval of previous meeting minutes.; Website Committee update (written report).; Good Samaritan Fund report.; Research into mental health, suicide, PTSD.; Report on 2015 Trails Program.; Scholarship program.; Reunion evaluation and evaluation of future reunions.; Membership Report.; Evergreen Museum status and proposal for traveling Smokejumper display.; Update on NSA History project.; Ideas on Future Fundraising.; Budget Report of 2015-16 1st quarter Budget.; Investment Committee report.; Report on Malvin Brown event.; Merchandise report-future.; Long-term planning - Initial stage.; Current Mission Statement.; Current identified Values.; Preserving and cataloging smokejumper history.; Social …
Evaluating The Use Of Tree Shelters For Direct Seeding Of Castanea On A Surface Mine In Appalachia, Christopher Barton, Jarrod Miller, Kenton L. Sena, Patrick Angel, Michael French
Evaluating The Use Of Tree Shelters For Direct Seeding Of Castanea On A Surface Mine In Appalachia, Christopher Barton, Jarrod Miller, Kenton L. Sena, Patrick Angel, Michael French
Forestry and Natural Resources Faculty Publications
American chestnut (Castanea dentata), once a primary constituent of the eastern hardwood forest ecosystem, was nearly extirpated from the forest canopy by the accidental introduction of chestnut blight (Cryphonectria parasitica). An intensive breeding program has sought to breed blight resistance from Chinese chestnut into American chestnuts, while maintaining as much of the desirable American chestnut phenotypes as possible. Previous studies suggest that these blight resistant American chestnuts, termed “restoration chestnuts”, are capable of thriving on reclaimed surface mines. We direct seeded pure Chinese, pure American, and three backcross lines into brown sandstone minesoil on a mine …
Forest Diversity And Disturbance: Changing Influences And The Future Of Virginia’S Forests, Christine J. Small, James L. Chamberlain
Forest Diversity And Disturbance: Changing Influences And The Future Of Virginia’S Forests, Christine J. Small, James L. Chamberlain
Virginia Journal of Science
The Virginia landscape supports a remarkable diversity of forests, from maritime dune woodlands, swamp forests, and pine savannas of the Atlantic Coastal Plain, to post-agricultural pine-hardwood forests of the Piedmont, to mixed oak, mesophytic, northern hardwood, and high elevation spruce-fir forests across three mountain provinces in western parts of the state. Virginia’s forests also have been profoundly shaped by disturbance. Chestnut blight, hemlock woolly adelgid, emerald ash borer, and other pests have caused declines or functional extirpation of foundation species. Invasive plants like multiflora rose, Oriental bittersweet, and Japanese stiltgrass threaten both disturbed and intact forests. Oaks and other fire-dependent …
Economic Contribution Of Agriculture And Food To Arkansas' Gross Domestic Product 1997-2013, Leah English, Jennie Popp, Wayne Miller
Economic Contribution Of Agriculture And Food To Arkansas' Gross Domestic Product 1997-2013, Leah English, Jennie Popp, Wayne Miller
Research Reports and Research Bulletins
Agricultural production, processing, and retail industries are major contributors to the Arkansas economy in terms of GDP. Agriculture contributes to the economy through direct agricultural production, value-added processing, and agricultural retail activities, and it also plays an important role through its interactions with other sectors. The use of non-agricultural goods and services as inputs into the agricultural sector promotes diversified growth in Arkansas’ economy; thus agriculture remains a vital part of Arkansas’ economy. This report: 1) compares the relative size of the Agriculture and Food Sector in Arkansas with those of neighboring states; 2) provides an overview of Arkansas’ economy …
Mcicsl Newsletter - October 2015, Shannon R. Trimboli Education Coordinator
Mcicsl Newsletter - October 2015, Shannon R. Trimboli Education Coordinator
MCICSL Newsletter
This issue includes the following:
Mercy Academy Begins Study of Mammoth Cave’s Aquatic Habitat
National Network of Research Learning Centers Releases New Strategic Framework
as well as education and research highlights, MCICSL symposium information and FY16 Education report
The Dandy Scroll, Fall 2015, University Of Maine Pulp And Paper Foundation
The Dandy Scroll, Fall 2015, University Of Maine Pulp And Paper Foundation
General University of Maine Publications
The Fall 2015 issue of The Dandy Scroll newsletter produced by the University of Maine Pulp and Paper Foundation.
An Avian Biological Gradient Across Tropical Dry Lowland Local Habitats At Playa Venao, Los Santos Province, Panama, Abigail Thomas
An Avian Biological Gradient Across Tropical Dry Lowland Local Habitats At Playa Venao, Los Santos Province, Panama, Abigail Thomas
Independent Study Project (ISP) Collection
There are a myriad of forest types within Panama, varying by elevation, precipitation and other abiotic factors, which hosts a wide variety of native and migratory species in uniquely-structured avian communities. Panama has been well assessed for presence and distribution of its 987 collective avian species (Angehr, 2014). However most studies in Panama have been broad in scope, overlooking the highly specified habitats that are uniquely structured to host a certain range of avifauna communities. The distinctions in community structure of avifauna along a coastal to inland gradient were assessed among three specialized habitats: the Central Pacific coast, partially deforested …
Assessing The Sustainability Of Selective Logging In Ankarabolava-Agnakatrika New Protected Area, Eileen Nakahata
Assessing The Sustainability Of Selective Logging In Ankarabolava-Agnakatrika New Protected Area, Eileen Nakahata
Independent Study Project (ISP) Collection
Over the past 50 years, more than 90% of dense low-altitude humid forest in the District of Vangaindrano has been lost to deforestation and the remaining fragments continue to be threatened by slash and burn agriculture and selective cutting by local populations. These activities are driven by widespread poverty, population growth, and lack of development, which have made subsistence increasingly difficult. This study investigates logging rates and the stock of five commercially valuable trees in the Ankarabolava-Agnakatrika New Protected Area. Fifteen 1000m2 transects were established systematically within the territory of the Matanga commune. Within each transect data was collected …
Plant Index Card For Rubus Parviflorus,Western Thimbleberry, Jane Claire Dirks-Edmunds
Plant Index Card For Rubus Parviflorus,Western Thimbleberry, Jane Claire Dirks-Edmunds
Jane Claire Dirks-Edmunds Documents
This is one example of a research card used by Dr. Jane Claire Dirks-Edmunds. Dirks-Edmunds used these cards to catalog the plants, animals, and insects at her Saddleback Mountain research site during the 1950s. This card has notes on Rubus parviflorus (thimbleberry) a part of the Rosaceae (rose) family.
Heterogeneous Oxidation Of Catechol, Elizabeth A. Pillar, Ruixin Zhou, Marcelo I. Guzman
Heterogeneous Oxidation Of Catechol, Elizabeth A. Pillar, Ruixin Zhou, Marcelo I. Guzman
Chemistry Faculty Publications
Natural and anthropogenic emissions of aromatic hydrocarbons from biomass burning, agro-industrial settings, and fossil fuel combustion contribute precursors to secondary aerosol formation (SOA). How these compounds are processed under humid tropospheric conditions is the focus of current attention to understand their environmental fate. This work shows how catechol thin films, a model for oxygenated aromatic hydrocarbons present in biomass burning and combustion aerosols, undergo heterogeneous oxidation at the air–solid interface under variable relative humidity (RH = 0–90%). The maximum reactive uptake coefficient of O3(g) by catechol γO3 = (7.49 ± 0.35) × 10–6 occurs for …
Modeling Wood Fibre Length In Black Spruce (Picea Mariana (Mill.) Bsp) Based On Ecological Land Classification, Elisha Townshend, Bharat Pokharel, Art Groot, Doug Pitt, Jeffery P. Dech
Modeling Wood Fibre Length In Black Spruce (Picea Mariana (Mill.) Bsp) Based On Ecological Land Classification, Elisha Townshend, Bharat Pokharel, Art Groot, Doug Pitt, Jeffery P. Dech
Agricultural and Environmental Sciences Faculty Research
Effective planning to optimize the forest value chain requires accurate and detailed information about the resource; however, estimates of the distribution of fibre properties on the landscape are largely unavailable prior to harvest. Our objective was to fit a model of the tree-level average fibre length related to ecosite classification and other forest inventory variables depicted at the landscape scale. A series of black spruce increment cores were collected at breast height from trees in nine different ecosite groups within the boreal forest of northeastern Ontario, and processed using standard techniques for maceration and fibre length measurement. Regression tree analysis …
Smokejumper Obituary: Gillin, Chalmer C. (Cave Junction 1945), National Smokejumper Association
Smokejumper Obituary: Gillin, Chalmer C. (Cave Junction 1945), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Weaver, Richard S. (Missoula 1943), National Smokejumper Association
Smokejumper Obituary: Weaver, Richard S. (Missoula 1943), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Landscape Position Influences Microbial Composition And Function Via Redistribution Of Soil Water Across A Watershed, Zhe Du, Diego Andrés Riveros-Iregui, Ryan T. Jones, Timothy R. Mcdermott, John E. Dore, Brian L. Mcglynn, Ryan E. Emanuel, Xu Li
Landscape Position Influences Microbial Composition And Function Via Redistribution Of Soil Water Across A Watershed, Zhe Du, Diego Andrés Riveros-Iregui, Ryan T. Jones, Timothy R. Mcdermott, John E. Dore, Brian L. Mcglynn, Ryan E. Emanuel, Xu Li
Department of Civil and Environmental Engineering: Faculty Publications
Subalpine forest ecosystems influence global carbon cycling. However, little is known about the compositions of their soil microbial communities and how these may vary with soil environmental conditions. The goal of this study was to characterize the soil microbial communities in a subalpine forest watershed in central Montana (Stringer Creek watershed within the Tenderfoot Creek Experimental Forest) and to investigate their relationships with environmental conditions and soil carbonaceous gases. As assessed by tagged Illumina sequencing of the 16S rRNA gene, community composition and structure differed significantly among three landscape positions: high upland zones (HUZ), low upland zones (LUZ), and riparian …
Mcicsl Newsletter - September 2015, Shannon R. Trimboli Education Coordinator
Mcicsl Newsletter - September 2015, Shannon R. Trimboli Education Coordinator
MCICSL Newsletter
This issue includes the following:
Citizen Scientists Contribute Over $46,700 of Labor to Mammoth Cave National Park
Federal Agencies Directed to Advance Citizen Science
as well as education and research highlights,and MCICSL strategic planning.