Economic Contribution Of The Agricultural Sector To The Arkansas Economy In 2017, 2019 University of Arkansas, Fayetteville
Economic Contribution Of The Agricultural Sector To The Arkansas Economy In 2017, Leah English, Jennie Popp, Wayne Miller
Research Reports and Research Bulletins
Agriculture and associated agricultural activities are major contributors to the Arkansas economy. Agriculture is defined as the sum of agricultural production and processing activities, unless otherwise specified, and includes crop and animal production and processing, agricultural support industries, forestry and forest products, and textile goods. Agriculture contributes to the economy through direct agricultural production and value-added processing, and also leads to economic activity in other parts of the economy. This report is the eleventh in a series of reports examining agriculture’s economic contribution to the Arkansas economy. The total economic contribution of agriculture (direct, indirect, and induced effects) on ...
Valuing The Economic Benefits Of Conservation Land In Downeast Maine, 2019 University of Maine
Valuing The Economic Benefits Of Conservation Land In Downeast Maine, Lesley Lichko, Mindy Crandall, Tora Johnson, Adam Daigneault
Forest Resources Faculty Scholarship
This report uses an ecosystem services approach to calculate the economic value of conservation lands in Downeast Maine, an area composed of Hancock and Washington Counties. This region, roughly bordered by the Atlantic Ocean, the Penobscot River, and Canada, includes extensive coastline, thousands of acres of forestland, areas of agricultural land, mountains, lakes, rivers, and wetlands. The area is known for its recreational and aesthetic resources, and productive offshore areas. Employment centers range from the tourism-dominated area of Bar Harbor in Hancock County, adjacent to Acadia National Park, to the Baileyville tissue mill and Woodland pulp mill area in Washington ...
Matrix Recharge In A Shrink-Swell Floodplain Forest Soil, 2019 Louisiana State University
Matrix Recharge In A Shrink-Swell Floodplain Forest Soil, Savannah R. Morales
LSU Master's Theses
Despite the global distribution of fine-grained Vertisols, the hydrology of these floodplain soils is still not well understood. Vertisols shrink and swell depending on soil moisture leading to a range of soil pore sizes, from large macropore cracks to smaller micropores, and consequently a range of hydraulic conductivities. Despite the plethora of research indicating the importance of both flooding and soil moisture in floodplain ecosystems, the specific role that flooding plays in soil moisture recharge has been less widely studied and remains of interest. Blue food dye and deuterated water were used as tracers to determine the role of the ...
Press-Pulse Odocoileus Virginianus Herbivory In Relict Tsuga Canadensis Stands In The Western Upper Peninsula Of Michigan, Usa, 2019 Michigan Technological University
Press-Pulse Odocoileus Virginianus Herbivory In Relict Tsuga Canadensis Stands In The Western Upper Peninsula Of Michigan, Usa, Grace Parikh, Christopher R. Webster
Michigan Tech Publications
Ungulate herbivory occurring within a forest plant community’s natural range of variation may help maintain species diversity. However, acute or chronically elevated levels of herbivory can produce dramatic changes in forest communities. For example, chronically high levels of herbivory by white-tailed deer (Odocoileus virginianus Zimmerman) in regions of historically low abundance at northern latitudes have dramatically altered forest community composition. In eastern hemlock (Tsuga canadensis L. Carrière) stands where deer aggregate during winter, high deer use has been associated with a shift towards deciduous species (i.e., maples [Acer spp.]) dominating the regeneration layer. Especially harsh winters can lead ...
Integration Of Random Forest Classifiers And Deep Convolutional Neural Networks For Classification And Biomolecular Modeling Of Cancer Driver Mutations, Steve Agajanian, Odeyemi Oluyemi, Gennady M. Verkhivker
Mathematics, Physics, and Computer Science Faculty Articles and Research
Development of machine learning solutions for prediction of functional and clinical significance of cancer driver genes and mutations are paramount in modern biomedical research and have gained a significant momentum in a recent decade. In this work, we integrate different machine learning approaches, including tree based methods, random forest and gradient boosted tree (GBT) classifiers along with deep convolutional neural networks (CNN) for prediction of cancer driver mutations in the genomic datasets. The feasibility of CNN in using raw nucleotide sequences for classification of cancer driver mutations was initially explored by employing label encoding, one hot encoding, and embedding to ...
Mp764: Field Manual For Managing Eastern White Pine Health In New England, William H. Livingston, Isabel Munck, Kyle Lombard, Jennifer Weimer, Aaron Bergdahl, Laura S. Kenefic, Barbara Schultz, Robert S. Seymour
This manual provides basic information for identifying and evaluating important health problems of eastern white pine in New England. The health problems include:
• White pine weevil
• White pine blister rust
• Caliciopsis canker
• White pine bast scale
• White pine needle damage
• Red rot or Red-ring rot
In addition to providing descriptions of symptoms, signs, and risk factors, recommendations for white pine silviculture are described for managing stands for low densities and crop trees.
Genome Size Variation Within Species Of Chinese Jujube (Ziziphus Jujuba Mill.) And Its Wild Ancestor Sour Jujube (Z. Acidojujuba Cheng Et Liu), 2019 Hebei Agricultural University
Genome Size Variation Within Species Of Chinese Jujube (Ziziphus Jujuba Mill.) And Its Wild Ancestor Sour Jujube (Z. Acidojujuba Cheng Et Liu), Lihu Wang, Zhi Luo, Zhiguo Liu, Jin Zhao, Hairong Wei, Ping Liu, Mengjun Liu
Michigan Tech Publications
One of the most important attributes of a genome is genome size, which can to a large extent reflect the evolutionary history and diversity of a plant species. However, studies on genome size diversity within a species are still very limited. This study aims to clarify the variation in genome sizes of Chinese jujube and sour jujube, and to characterize if there exists an association between genome sizes and geographical variation. We measured the genome sizes of 301 cultivars of Chinese jujube and 81 genotypes of sour jujube by flow cytometry. Ten fruit traits, including weight, vertical diameter, horizontal diameter ...
Fire History Of A Georgia Montane Longleaf Pine (Pinus Palustris) Community, 2019 Georgia Department of Natural Resources, Nongame Conservation Section
Fire History Of A Georgia Montane Longleaf Pine (Pinus Palustris) Community, Nathan Klaus
Georgia Journal of Science
Montane longleaf pine forests, woodlands, and savannas are endangered, fire-dependent ecosystems of the Piedmont, Ridge and Valley, Appalachian, and Cumberland Plateau physiographic provinces of Georgia, Alabama, and North Carolina. Compared to other longleaf pine ecosystems, e.g., longleaf pine-wiregrass, little has been published about montane longleaf pine ecosystems. Understanding the historic fire regimes that once maintained montane longleaf pine ecosystems is an important first step toward achieving restoration and conservation goals for this ecosystem. I used two approaches to investigate historic fire regimes: 1) a dendrochronological study of fire scars on Sprewell Bluff Natural Area and 2) calculations of the ...
Introduction To Sorghum Paper Production, 2019 University of Nebraska-Lincoln
Introduction To Sorghum Paper Production, Zachary Christman
Theses, Dissertations, and Student Research in Agronomy and Horticulture
Sorghum is a tall grass used for many commercial products such as fodder and syrup. The 10 to 15 feet stalk of the plant has lower lignin than wood and provides a fiber length of 2.31 mm in the outer covering and 1.38 mm for the leaf. Sorghum fiber makes a high quality, strong paper suitable for printing, packaging and paperboard.
Forest Feedstock Supply Chains And Market Potential For Wood Pellet Facilities In The Ozark And Appalachia Regions, 2019 Missouri State University
Forest Feedstock Supply Chains And Market Potential For Wood Pellet Facilities In The Ozark And Appalachia Regions, James Robert Criger
MSU Graduate Theses
The pellet wood industry in the United States has grown exponentially in recent years, due mostly to the expanding export market to Europe. At this time, the European market for pellet wood is highly subsidized as part of the Renewable Energy Directive (RED) in an effort to mitigate fossil fuel consumption for power production. Although there are other popular renewable resources such as wind, water, and solar, the burning of biomass is among the most utilized sources of renewable energy today. This study examines the existing pellet wood industry in the United States, particularly within the Ozarks and Appalachia Regions ...
A Socio-Ecological Approach To Wildlife Disease Risk, 2019 University of Maine
A Socio-Ecological Approach To Wildlife Disease Risk, James A. Elliott
Electronic Theses and Dissertations
Many Eastern moose (Alces alces, Linnaeus; 1758) populations along the southern edge of their North American range are declining, including those in Minnesota, Vermont, and New Hampshire. More recently, in Maine, winter ticks (Dermacentor albipictus; Packard 1869) are suspected to also be influencing the population through periodic widespread mortality of calves. While metabolic stress from heavy winter tick parasitism has been implicated in these moose population declines, little is known about the relative effects of tick-borne diseases, which may compound metabolic stress. Tick-borne pathogens known to infect cervid species include Anaplasma species, a group of bacteria that cause a disease ...
Productivity, Costs, And Best Management Practices For Major Timber Harvesting Frameworks In Maine, 2019 University of Maine
Productivity, Costs, And Best Management Practices For Major Timber Harvesting Frameworks In Maine, Harikrishnan Soman
Electronic Theses and Dissertations
Though the timber harvesting industry in Maine ranges over two centuries, the state has more forest cover than a century ago. Currently, some of the crucial challenges faced by the forest management industry in Maine and elsewhere in the northeastern US are increasing costs of forest operations, diminishing monetary returns and falling markets.
The major goal of this study was to evaluate the production economics of timber harvesting frameworks under different silvicultural prescriptions common to the region. For which, two field studies were conducted at two different locations in Maine, US. The first field study (Study I) was conducted in ...
Effects Of Forest Management On Densities And Nest Survival Of Breeding Birds In Upland Hardwood Ecosystems, 2019 Pittsburg State University
Effects Of Forest Management On Densities And Nest Survival Of Breeding Birds In Upland Hardwood Ecosystems, Michael Barnes
Electronic Thesis Collection
Over the past 50 years, significant declines in 47% of Neotropical migrant bird species have been documented in North America. Declines are most likely due to the loss and fragmentation of breeding, wintering, and stopover habitat mainly caused by agriculture and urban development. This loss of critical habitat results in population sinks that need to be maintained by immigration from a population source found in continuously forested landscapes. However, in landscapes harvested for timber, forest management practices alter the landscape and as a result, affect breeding bird abundances and nest success. The objective of our study was to determine the ...
Mesopredator Distribution, Abundance And Potential Competition With The American Burying Beetle (Nicrophorus Americanus) At Fort Chaffee Joint Maneuver Training Center, Karisa Fenton
Theses and Dissertations from 2019
The American burying beetle (Nicrophorus americanus, hereafter ABB) was listed as an endangered species in 1989 and many hypotheses have been developed to explain their rangewide decline. I investigated the carcass competition hypothesis that implicates increased competition between vertebrate scavengers and ABBs for appropriate-sized carcasses as a cause for ABB decline. Predators of medium size that occupy an intermediate trophic level (hereafter mesopredators) are potential competitors for carcasses. I used camera trapping to assess mesopredator abundances in nine different habitats at Fort Chaffee Joint Maneuver Training Center (FCJMTC) in western Arkansas because this area supports the largest known population of ...
Stand Location Variance As An Indicator Of Disturbance Regime In A Monotypic Tsuga Canadensis Forest, 2019 Olivet Nazarene University
Stand Location Variance As An Indicator Of Disturbance Regime In A Monotypic Tsuga Canadensis Forest, Cole J. Doolittle
Honors Program Projects
Disturbance regimes, which are critical components of forest ecosystems, influence forest morphology, biodiversity, and regeneration. The heterogeneity of disturbance regimes are not well understood on small scales. In this study I analyzed tree cores from five sites within a Tsuga canadensis (Eastern hemlock) forest in northern Wisconsin to investigate disturbance regimes through mean growth release criteria. This study investigated the following questions: 1) Are disturbance regimes in T. canadensis stand level or site specific? 2) If disturbances are site specific, is site location an indicator of disturbance regime? 3) Do site characteristics such as density and tree diameter at breast ...
Mapping Wilderness Character In Adams County, Pennsylvania, 2019 Gettysburg College
Mapping Wilderness Character In Adams County, Pennsylvania, Alyssa J. Kaewwilai
Gettysburg Social Sciences Review
The spatial trends in wilderness character in Adams County, Pennsylvania were examined to evaluate how influenced specific areas are impacted by human activity and development. Indicators of wilderness character were selected as natural, untrammelled, undeveloped, along with solitude and unconfined recreation by the Death Valley National Park staff in which a 0-4 ranking system was based upon to portray a range of most degraded to optimal land. This was executed through examination of factors such as abundance of biodiversity and human development within the given area before a Monte Carlo simulation was run to show sensitivity of change. It was ...
Amphibian And Reptile Community Responses To Forest And Riparian Disturbance, 2019 University of Arkansas, Fayetteville
Amphibian And Reptile Community Responses To Forest And Riparian Disturbance, Jacquelyn Christine Guzy
Theses and Dissertations
Riparian zones are transitional, semi-terrestrial areas regularly influenced by freshwater. These areas serve as dispersal corridors for many animal and plant species and ultimately function as important reservoirs of biodiversity in altered landscapes. While much of the riparian habitat in the United States has been affected by anthropogenic activities, management actions may mitigate potentially negative influences of these activities. For example, Streamside Management Zones (i.e., riparian buffers; SMZs) are commonly implemented within managed forests to protect water quality, but may also provide habitat for riparian-associated wildlife. Yet, little research has rigorously addressed the value of SMZs for wildlife, particularly ...
Cool And Warm Season Climate Signals In Tree Rings From North America, 2019 University of Arkansas, Fayetteville
Cool And Warm Season Climate Signals In Tree Rings From North America, Max Carl Arne Torbenson
Theses and Dissertations
Earlywood (EW) and latewood (LW) ring-width chronologies have become an increasingly important proxy in paleoclimate reconstructions. These subannual variables can provide estimates of past hydroclimate variability for seasonal windows that total ring-widths cannot resolve. The strength of the relationship between EW and LW series may influence what type of paleoclimate information is embedded within the tree-ring series. High correlations (> 0.70) between EW and LW are recorded for much of the continent but the magnitude of correlation varies greatly across space and species boundaries. Using four LW chronologies from shortleaf pine, the North American conifer species displaying the lowest EW-LW ...
Analysis And Conservation Of Native Forests At Kessler Mountain Fayetteville, Arkansas, 2019 University of Arkansas, Fayetteville
Analysis And Conservation Of Native Forests At Kessler Mountain Fayetteville, Arkansas, Alan James Edmondson
Theses and Dissertations
Kessler Mountain in Fayetteville Arkansas has long been recognized for its beauty and natural resources. Parts of Kessler Mountain have been homesteaded and developed in the past, but most of the mountain has remained relatively undisturbed. The planned development of over 4,000 housing units to cover Kessler Mountain stimulated controversy and consideration of other management alternatives. A twist of fate involving an economic recession, a dedicated group of outdoor recreation enthusiasts, and environmental conservationists led to the permanent protection of 384 acres in the Kessler Mountain Regional Park. To help evaluate the natural resources at Kessler Mountain, forest composition ...
Genomic Signatures Of Extensive Inbreeding In Isle Royale Wolves, A Population On The Threshold Of Extinction, 2019 University of California
Genomic Signatures Of Extensive Inbreeding In Isle Royale Wolves, A Population On The Threshold Of Extinction, Jacqueline A. Robinson, Jannikke Raikkonen, Leah Vucetich, John A. Vucetich, Rolf O. Peterson, Kirk Lohmueller, Robert Wayne
Michigan Tech Publications
The observation that small isolated populations often suffer reduced fitness from inbreeding depression has guided conservation theory and practice for decades. However, investigating the genome-wide dynamics associated with inbreeding depression in natural populations is only now feasible with relatively inexpensive sequencing technology and annotated reference genomes. To characterize the genome-wide effects of intense inbreeding and isolation, we performed whole-genome sequencing and morphological analysis of an iconic inbred population, the gray wolves (Canis lupus) of Isle Royale. Through population genetic simulations and comparison with wolf genomes from a variety of demographic histories, we find evidence that severe inbreeding depression in this ...