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Articles 451 - 480 of 11528
Full-Text Articles in Life Sciences
Timber Talk, Vol. 63, No. 3, July 2025 (Special)
Timber Talk, Vol. 63, No. 3, July 2025 (Special)
Timber Talk: Nebraska Forest Industry Newsletter
Timber Talk, Vol. 63, No. 3, July 2025 (Special)
Influence Of Different Rates Of Biochar And Deer Browsing On Pollinator Plant Productivity, Bipana Bhusal
Influence Of Different Rates Of Biochar And Deer Browsing On Pollinator Plant Productivity, Bipana Bhusal
Graduate Theses, Dissertations, and Problem Reports (ETD)
Biochar, a carbon-rich material produced from biomass, has received wide attention for soil amendment to improve plant growth. However, its specific effects on pollinator friendly plants remain poorly understood. In this study, we evaluated the effects of four biochar application rates (0, 10, 20, 40 tons/acre) and deer exclusion (fenced vs. unfenced) on the productivity of three pollinator species; Buckwheat (Fagopyrum esculentum), Plains Coreopsis (Coreopsis tinctoria), and Black-eyed Susan (Rudbeckia hirta) in a utility right of way with a history of mining. A split-plot randomized design was used, and the results were analyzed using …
2025 Annual Report, Tennessee. Division Of Forestry And Tennessee. Department Of Agriculture
2025 Annual Report, Tennessee. Division Of Forestry And Tennessee. Department Of Agriculture
Forestry Annual Reports
This annual report presents an overview of Tennessee Forestry Commission programs and management.
Feasibility Of Producing Non-Structural Wood Products Using Trembling Aspen Lumber, Mengyuan Zhang
Feasibility Of Producing Non-Structural Wood Products Using Trembling Aspen Lumber, Mengyuan Zhang
Aspen Bibliography
Trembling aspen (Populus tremuloides) is abundant in Canada but underutilized in non-structural solid wood products.This study was aimed at evaluating the feasibility of using aspen lumber to produce flooring, moulding, and siding. The shrinkage, surface roughness, and wettability of aspen wood were tested. The surface hardness, screw withdrawal resistance, colour change, and dimensional stability of there products fabricated were examined. The wood yield of each product was analyzed. It was found that aspen showed superior machinability and wettability to silver maple and yellow poplar. Aspen flooring had a Brinell hardness of 13.47 MPa, 60% lower than silver maple. …
Assessing Understory Along The Elk River (Hikshari') In Headwaters Forest Reserve, Humboldt County, California, Julie R. Meyers, Aliyah M. Ingram, Caleb N. Larkin, Joshua L. Carpenter
Assessing Understory Along The Elk River (Hikshari') In Headwaters Forest Reserve, Humboldt County, California, Julie R. Meyers, Aliyah M. Ingram, Caleb N. Larkin, Joshua L. Carpenter
Environmental Science & Management Senior Capstones
Northern California’s extensive logging history and lack of forest management has altered old-growth coast redwood (Sequoia sempervirens) forests, leaving dense, homogenous second and third-growth forest stands. This has led to the use of modern restoration techniques such as variable density thinning (VDT) which aims to rehabilitate old-growth forest conditions by improving stand heterogeneity and light availability for understory species. Our study was done in Headwaters Forest Reserve (HFR) along the Elk River (Hikshari’) Trail in Humboldt County, California. Initially, the project was supervised by the Bureau of Land Management (BLM) Arcata Field Office. However, the 2025 U.S. government …
Critical Environmental Communication Framework, Shumaila J. Bhatti, Srivi Ramasubramanian, Andrea Feldpausch-Parker, Bruno Takahashi, Silje Kristiansen
Critical Environmental Communication Framework, Shumaila J. Bhatti, Srivi Ramasubramanian, Andrea Feldpausch-Parker, Bruno Takahashi, Silje Kristiansen
Media Studies - All Scholarship
This study develops a Critical Environmental Communication (CEC) framework to assess the landscape of Environmental Communication research and to what extent and in which ways critical and justice-oriented perspectives are included. The CEC framework consists of four interconnected themes: (a) Marginalized Ecocultural Identities, (b) Context and Scale, (c) Power and Agency, and (d) Justice, Equity, Diversity, Access, and Inclusion (JEDAI). Using this framework in a bibliometric analysis examining 1,297 Environmental Communication publications, we assess the occurrence of these themes in the scholarship. Our analysis found that Marginalized Ecocultural Identities, and Context and Scale were most frequently occurring, while Power and …
A Method For Empirically Assessing Small Area Estimators Via Bootstrap-Weighted K-Nearest-Neighbor Artificial Populations, With Applications To Forest Inventory, Grayson W. White, Jerzy Wieczorek, Zachariah W. Cody, Emily X. Tan, Jacqueline O. Chistolini, Kelly S. Mcconville, Tracey S. Frescino, Gretchen G. Moisen
A Method For Empirically Assessing Small Area Estimators Via Bootstrap-Weighted K-Nearest-Neighbor Artificial Populations, With Applications To Forest Inventory, Grayson W. White, Jerzy Wieczorek, Zachariah W. Cody, Emily X. Tan, Jacqueline O. Chistolini, Kelly S. Mcconville, Tracey S. Frescino, Gretchen G. Moisen
Faculty Journal Articles
National Forest Inventories monitor forest attributes across a variety of spatial and temporal scales in a given country. Increased interest in reporting and management at smaller scales has driven National Forest Inventories to investigate and adopt small area estimation (SAE) due to the promise of increased precision at these scales. However, comparing and evaluating SAE models for a given application is inherently difficult. Typically, many areas lack enough data to check unit-level modeling assumptions or to assess unit-level predictions empirically; and no ground truth is available for checking area-level estimates. Design-based simulation from artificial populations can help with each of …
Potential Of Using Trembling Aspen To Make Structural Engineered Wood Products, Dawei Wang
Potential Of Using Trembling Aspen To Make Structural Engineered Wood Products, Dawei Wang
Aspen Bibliography
Trembling aspen (Populus tremuloides) is abundant in Canada but is widely considered an underutilized species. This study was aimed at evaluating the potential of using aspen lumber to produce cross-laminated timber (CLT), glued-laminated timber (glulam), and wood I-joists. The key mechanical properties of these engineered wood products, which were fabricated using a modified grading criterion, were examined. It was found that 1) The mean effective bending stiffness and characteristic bending moment resistance of 5-layer CLT specimens in the major-strength direction were 5,069x109 N·mm2/m and 97.65x106 N·mm/m; 2) The mean apparent MOE and characteristic modulus …
Collaborative Wildfire Governance Within The Southwest Idaho Wildfire Crisis Strategy Landscape: Survey Results 2025, Mahmood Muttaqee, Cody R. Evers, Lindsay K. Campbell, Max Nielsen-Pincus, Olivia Awbrey, Kathryn Hixson, Michelle Johnson, Erika Svendsen
Collaborative Wildfire Governance Within The Southwest Idaho Wildfire Crisis Strategy Landscape: Survey Results 2025, Mahmood Muttaqee, Cody R. Evers, Lindsay K. Campbell, Max Nielsen-Pincus, Olivia Awbrey, Kathryn Hixson, Michelle Johnson, Erika Svendsen
Environmental Science and Management Faculty Publications and Presentations
Collaboration plays a critical role in wildfire risk mitigation efforts. This study examines collaborative wildfire governance networks within Southwest Idaho, a priority landscape designated in 2022 under the USDA Forest Service's Wildfire Crisis Strategy (WCS). Through survey data from 64 respondents, the Fueling Adaptation study aimed to identify the structure, capacity, and gaps in governance networks addressing wildfire risk in Southwest Idaho and understand how WCS investments have influenced wildfire management in the area. The findings reveal a growing governance network centered on the USDA Forest Service and the Idaho Department of Lands and supported by numerous non-governmental organizations and …
Timber Talk, Vol. 63, No. 1, March 2025
Timber Talk, Vol. 63, No. 1, March 2025
Timber Talk: Nebraska Forest Industry Newsletter
Timber Talk, Vol. 63, No. 1, March 2025
Timber Talk, Vol. 63, No. 2, June 2025
Timber Talk, Vol. 63, No. 2, June 2025
Timber Talk: Nebraska Forest Industry Newsletter
Timber Talk, Vol. 63, No. 2, June 2025
Assessing The Potential For Bigleaf Maple Syrup Production In Humboldt County, Ca, David A. Reinhart, Juan A. Ramos-Cool, Liam H. Richardson
Assessing The Potential For Bigleaf Maple Syrup Production In Humboldt County, Ca, David A. Reinhart, Juan A. Ramos-Cool, Liam H. Richardson
Undergraduate Scholarship
The bigleaf maple (Acer macrophyllum, Pursh) is the largest maple of the Pacific Northwest. While it has generally been treated as a nuisance in timber harvesting operations, a small amount of research has been conducted on its sugaring ability in Oregon, Washington, and British Columbia. This research has yet to reach further south in the species' range. This study aims to help a California landowner understand which maple trees on his property produce the most maple sap, to gauge what environmental factors contribute to maple sap production, and to find greater implications for the production of maple sap …
Datasets And Script Associated With S. B. Correa Et Al. 2025. Floodplain Forests Drive Fruit-Eating Fish Diversity At The Amazon Basin Scale, Sandra B. Correa, Karold V. Coronado-Franco, Celine Jézéquel, Amanda Cantarute Rodrigues, Kristine O. Evans
Datasets And Script Associated With S. B. Correa Et Al. 2025. Floodplain Forests Drive Fruit-Eating Fish Diversity At The Amazon Basin Scale, Sandra B. Correa, Karold V. Coronado-Franco, Celine Jézéquel, Amanda Cantarute Rodrigues, Kristine O. Evans
CFR Publications
Datasets and script associated with S. B. Correa et al. 2025. Floodplain forests drive fruit-eating fish diversity at the Amazon Basin scale. File 1 (amazonfish_dist.csv) is a Comma-delimited file that includes occurrences of fruit-eating fish species per subbasin. File 2 (sp_frug_all.csv) is a Comma-delimited file that includes the scientific names of 29 fruit-eating fish species. File 3 (sp_frug_serrasal.csv) is a Comma-delimited file that includes the scientific names of 12 fruit-eating fish species of the family Serrasalmidae. File 4 (veget_data.csv) is a Comma delimited file that includes tree species richness per subbasin. File 5 (Script_analyses_plots_tables.docx) is a Microsoft Word file that …
Two-Year Biomass And Productivity Data For Populus Trials In Mississippi, Courtney M. Siegert, Heidi Renninger, Austin Himes, Waqar Shafqat, Andrea Drager
Two-Year Biomass And Productivity Data For Populus Trials In Mississippi, Courtney M. Siegert, Heidi Renninger, Austin Himes, Waqar Shafqat, Andrea Drager
CFR Publications
This dataset contains two years of biomass and productivity data for field trials of Populus in Mississippi.
Huchum: The Legacy Of Fire Suppression, Indigenous Land Management, And Media Representation, Carolyn Coyne
Huchum: The Legacy Of Fire Suppression, Indigenous Land Management, And Media Representation, Carolyn Coyne
Pomona Senior Theses
In my thesis, I examine how various forms of news media from the 1900s to present day in Ohlone territory have framed a particular hegemonic ideology around fire that matches early colonial journal entries – an ideology that is fueled by fear, sensationalism, and exclusion and directly commits violence against the Ohlone people. I investigate this time period because this is when modern news corporations, like The New York Times, rose into prominence. Specifically, I question how media representations of fire inform regulations over controlled burns; what are the similarities in discourse between media framing and policy? What tactics are …
How Forest Stand Conditions Influence Whitebark Pine And Clark’S Nutcracker: A Systematic Review, Bryan Mathew Cohen
How Forest Stand Conditions Influence Whitebark Pine And Clark’S Nutcracker: A Systematic Review, Bryan Mathew Cohen
Undergraduate Theses, Professional Papers, and Capstone Artifacts
Whitebark pine (Pinus albicaulis), a keystone species of high-elevation ecosystems of western North America, is threatened with extinction due to disease (Blister rust), pests (Mountain pine beetle), and climate change. Regeneration of the species depends nearly exclusively on the seed-caching behavior of Clark’s nutcracker (Nucifraga columbiana, Family Corvidae). Because of this, conservation of whitebark ecosystems requires restoring stand structures that favor nutcrackers. Although there are increasing numbers of studies on the relationship between nutcrackers and whitebark pine, findings have not yet been synthesized, limiting knowledge for application to management. I did a systematic literature review to answer the following questions: …
Predicting Patterns Of Species Presence In Eastern Kentucky Using Fine- And Broad-Scale Site-Species Relationships, Kyra L. Shrout
Predicting Patterns Of Species Presence In Eastern Kentucky Using Fine- And Broad-Scale Site-Species Relationships, Kyra L. Shrout
Theses and Dissertations--Forestry and Natural Resources
Understanding site-species relationships is integral to effective forest management, as landscape factors influence both the presence of mature trees and the regeneration of future trees. This study examined the influence of topographic, soil, and canopy variables on species presence at both fine (i.e., stand-level) and broad (i.e., forest-wide) scales within Robinson Forest, Kentucky. At the fine-scale, using vegetation data from permanent sampling plots, LiDAR-derived topographic data, and historical soils data, the relationships between the species of interest and the landscape variables within a single watershed were analyzed using conditional inference tree (CTree) models. Elevation and slope aspect were the most …
Long Oligos: Direct Chemical Synthesis Of Genes With Up To 1728 Nucleotides, Yipeng Yin, Reed Arneson, Yinan Yuan, Shiyue Fang
Long Oligos: Direct Chemical Synthesis Of Genes With Up To 1728 Nucleotides, Yipeng Yin, Reed Arneson, Yinan Yuan, Shiyue Fang
Michigan Tech Publications
The longest oligos that can be chemically synthesized are considered to be 200-mers. Here, we report direct synthesis of an 800-mer green fluorescent protein gene and a 1728-mer Φ29 DNA polymerase gene on an automated synthesizer. Key innovations that enabled this breakthrough include conducting the synthesis on a smooth surface rather than within the pores of traditional supports, and the use of the powerful catching-by-polymerization (CBP) method for isolating the full-length oligos from a complex mixture. Conducting synthesis on a smooth surface not only eliminated the steric hindrance that would otherwise prevent long oligo assembly, but also, surprisingly, drastically reduced …
Six Rivers National Forest Hazardous Fuels And Fire Management Project 2025 Orleans Complex Fire Effects From 9/13/25 - 9/14/25, James L. Parr, Nosheen Maung, Darby J. Lewis, Javier E. Margarito, Giancarlo Golloti
Six Rivers National Forest Hazardous Fuels And Fire Management Project 2025 Orleans Complex Fire Effects From 9/13/25 - 9/14/25, James L. Parr, Nosheen Maung, Darby J. Lewis, Javier E. Margarito, Giancarlo Golloti
Environmental Science & Management Senior Capstones
The 2025 Orleans Complex affected the Klamath National Priority Landscape, designated by Congress as a priority to reduce fuel load and mitigate wildfire risk near rural, at-risk communities. To address the threat of large destructive wildfires, the 2023 Six Rivers Hazardous Fuels and Fire Management Project identified desired ecological conditions, using the right type of fire at the right time and place.
Initial Fungal Decomposer Community Determines Wood-Derived Carbon In Discrete Soil Carbon Pools In Aspen Clearcuts, Theresa K. Meyer
Initial Fungal Decomposer Community Determines Wood-Derived Carbon In Discrete Soil Carbon Pools In Aspen Clearcuts, Theresa K. Meyer
Dissertations, Master's Theses and Master's Reports
Soil carbon storage can be affected by forest management activities that alter the amount of biomass at a site, including slash retention and salvage harvesting. Initial fungal colonization of retained biomass may affect soil carbon storage due to differences in fungal decomposition strategies. To examine the effect of wood addition on wood-derived soil carbon storage and the interaction between initial fungal decomposer communities and wood application depth, δ13C modified wood inoculated with white- or brown-rot fungi was applied to soils across Michigan’s Upper Peninsula. Wood-derived carbon was assessed after 3.5 years in bulk soil samples and in three …
Mangroves: A Lesson On Modeling Changing Shorelines, Willa Skye
Mangroves: A Lesson On Modeling Changing Shorelines, Willa Skye
ENGS 15.11: Design and Education
This lesson is an overview of storm barriers, specifically mangroves and how they maintain shorelines. It is meant to offer a visual experience of coastline protection and provide a background for deeper understanding about intertidal zones and their conservation. Students will spend time creating a solution to a flooding problem by making a mock coast and storm barrier. To wrap-up the lesson, students will pair up, then reflect on their model and then individually write or draw their takeaways.
Impacts Of Southern Pine Beetle (Dendroctonus Frontalis Zimmerman) On Loblolly Pine (Pinus Taeda L.) Canopy And Water Use In The Homochitto National Forest, Mississippi, Usa, Sasha Goodnow, Yun Yang, Hui Liu, Ashley Schulz
Impacts Of Southern Pine Beetle (Dendroctonus Frontalis Zimmerman) On Loblolly Pine (Pinus Taeda L.) Canopy And Water Use In The Homochitto National Forest, Mississippi, Usa, Sasha Goodnow, Yun Yang, Hui Liu, Ashley Schulz
Endeavors: Mississippi State Undergraduate Research Journal
Abiotic and biotic forest disturbances can have many impacts to forest ecosystem services, including to forest water use. Studies on impacts to forest evapotranspiration have been conducted on the mountain pine beetle (Dendroctonus ponderosae) in western North America, but not on the southern pine beetle (Dendroctonus frontalis), which is a native pest of loblolly pine (Pinus taeda) and shortleaf pine (Pinus echinata), in the southeastern United States. Stressed pine trees produce pheromones that attract southern pine beetles and, with enough stressed trees, beetle populations can quickly grow to epidemic levels and attack healthy trees, which results in widespread tree mortality. …
Age Class Is Not Related To Size Or Composition Of Home Ranges Among Suburban White-Tailed Deer During Parturition, Nathan D. Pyburn
Age Class Is Not Related To Size Or Composition Of Home Ranges Among Suburban White-Tailed Deer During Parturition, Nathan D. Pyburn
Journal of Earth and Life Science
How white-tailed deer use the landscape in an urban environment can help us understand the effects of urbanization on deer populations. White-tailed deer form observable matriarchal hierarchies in studied populations. This study examines the matriarchal structure, home range size, and home range composition of 25 collared white-tailed deer within the city limits of Bemidji, MN. The results found no significant difference between age class and home range size or composition. However, movement metrics from yearling and mature age classes were more similar than the juvenile age class females. I propose this is because social acceptance between mature females was higher …
Identification, Mapping And Treatment Of The Invasive Rosa Multiflora Using Unmanned Aerial Systems And Machine Learning Models, Kylie Virginia Shaw
Identification, Mapping And Treatment Of The Invasive Rosa Multiflora Using Unmanned Aerial Systems And Machine Learning Models, Kylie Virginia Shaw
Graduate Theses, Dissertations, and Problem Reports (ETD)
Invasive species are introduced species that cause detrimental impacts to the native ecosystem or cause harm to human health. The work necessary for land managers to survey for and treat invasive species takes up limited time, labor, and financial resources. This study assesses how Unmanned Aerial Systems (UAS) and machine learning models can be used to make the identification, mapping, and treatment of invasive vegetation more efficient and effective. A UAS-mounted multispectral camera captured images of our target species, Rosa multiflora (multiflora rose), throughout its growing season in southwest Pennsylvania. A random forest machine learning model was trained on these …
Machine Learning And Uass For Managing Autumn Olive (Elaeagnus Umbellata) On Reclaimed Surface Mines, Sean Michael Keane
Machine Learning And Uass For Managing Autumn Olive (Elaeagnus Umbellata) On Reclaimed Surface Mines, Sean Michael Keane
Graduate Theses, Dissertations, and Problem Reports (ETD)
This research introduces an innovative approach for managing autumn olive (Elaeagnus umbellata) on reclaimed surface mines through the integration of machine learning algorithms and unmanned aerial systems. The proliferation of autumn olive presents significant ecological challenges on disturbed landscapes, necessitating more efficient detection and control methods. This study evaluated Random Forest classification and deep learning approaches using the U-Net architecture for identifying autumn olive across four phenological stages using high-resolution imagery. The RGB U-Net model achieved F1-scores of 0.927, 0.912, and 0.871 for autumn olive detection during peak, late, and senescence stages respectively, outperforming both multispectral and vegetation …
Balancing Timber Harvest And Biodiversity: Impacts Of Selective Logging On Wildlife In The Chiquibul Forest Reserve, Belize, Kilynn Groen
Balancing Timber Harvest And Biodiversity: Impacts Of Selective Logging On Wildlife In The Chiquibul Forest Reserve, Belize, Kilynn Groen
Undergraduate Theses, Professional Papers, and Capstone Artifacts
Selective logging is often promoted as a sustainable forestry practice that maintains biodiversity and ecosystem function, yet its ecological consequences remain under examined, particularly in tropical forests. This study investigates how selective logging affects wildlife communities in the Chiquibul Forest Reserve, Belize. Using remote camera trap data from 22 sites (9 unlogged forest sites and 13 logged (stump) sites), we assessed species richness, trophic structure, and environmental predictors of wildlife abundance. While overall wildlife captures and species richness did not differ significantly between forest and stump habitats, principal component analysis revealed strong community-level separation, with stump habitats supporting distinct species …
Tree Crown Economics Of Broadleaf Deciduous Forests, Yiting Fan
Tree Crown Economics Of Broadleaf Deciduous Forests, Yiting Fan
Graduate Theses, Dissertations, and Problem Reports (ETD)
Tree crown architecture, a critical determinant of forest ecosystem processes such as photosynthesis, evapotranspiration, and spectral reflectance, is shaped by adaptive trade-offs in resource use and environmental responses. However, significant gaps remain in our understanding of how these traits vary across species, environmental gradients, and temporal scales. This dissertation addresses these gaps by employing remote sensing data across three interconnected studies. Together, these studies advance tree crown economic theory, highlighting how crown traits mediate trade-offs between light capture and water-use efficiency and how these traits influence forest responses to global change. Collectively, this dissertation offer insights for improving models that …
Synergetic Effect Of Cellulose And Chitosan Polymers In Cancer Treatment, Grace Peterson
Synergetic Effect Of Cellulose And Chitosan Polymers In Cancer Treatment, Grace Peterson
Graduate Theses, Dissertations, and Problem Reports (ETD)
This research explores the development of a biocompatible, natural drug delivery system designed for targeted cancer therapy. Lung cancer cells are used in these particular tests, but further research indicates treatment could be used for various cancer types. Traditional cancer treatments like chemotherapy are often limited by poor selectivity for tumor cells, causing significant damage to healthy tissues. The study proposes a dual-layered delivery system, utilizing Carboxymethyl Cellulose (CMC) as the core material and a charge-reversible chitosan shell to encapsulate and target cancer drugs. CMC, with its water solubility and ability to form stable gels, serves as a stable drug …
Screening Herbicides For Use In Newly Established Short Rotation Coppice Shrub Willow Plantations, Alex Thomas Smith
Screening Herbicides For Use In Newly Established Short Rotation Coppice Shrub Willow Plantations, Alex Thomas Smith
Graduate Theses, Dissertations, and Problem Reports (ETD)
A major setback for the establishment of short rotation coppice willow plantations is the control of competition from weeds. Weed competition has been found to cause increased mortality which lowers biomass yields when left uncontrolled. Mechanical weed control methods are the most used method of weed control, but their use can be complicated by cost, labor availability and site topography. Chemical weed control is also complicated by the fact that willow species are particularly sensitive to herbicides. Across three trials, we screen 11 herbicides for their potential to control weeds without significantly decreasing the vertical growth of willow trees. This …
The Everyday Scientist: Down In The Weeds In The Heart Of The South, Pamela Zendt
The Everyday Scientist: Down In The Weeds In The Heart Of The South, Pamela Zendt
Master's Projects
The Everyday Scientist: Down in the Weeds in the Heart of the South is a creative nonfiction capstone project that was released as a book. The narrative documents my two-year journey as a community scientist and explores how ordinary people contribute meaningfully to scientific research in the natural world. Rooted in my desire to connect my passion for the outdoors with the goals of the Master of Arts in Professional Writing program, this project illustrates that environmental science is not only for trained professionals. Instead, it thrives on the curiosity, dedication, and participation of volunteers who follow established protocols, collect …