Invasive Buckthorn Mapping: A Uav-Based Approach Utilizing Machine Learning, Gis, And Remote Sensing Techniques In The Upper Peninsula Of Michigan,
2023
Michigan Technological University
Invasive Buckthorn Mapping: A Uav-Based Approach Utilizing Machine Learning, Gis, And Remote Sensing Techniques In The Upper Peninsula Of Michigan, Vikranth Madeppa
Dissertations, Master's Theses and Master's Reports
An Invasive species is a species that is alien or non-native to the ecosystem which causes harm to economic, environmental, or human health (E.O. 13112 of Feb 3, 1999). Invasive species have posed a serious threat to ecosystems across the globe. These invasive species have impacts on the biodiversity and productivity of invaded forests. Remotely sensed data is a valuable resource for understanding and addressing issues related to invasive species. This study presents a novel approach for mapping the distribution of two invasive plant species, Common and Glossy Buckthorn, using unmanned aerial vehicles (UAVs), machine learning algorithms, geographic information systems …
Fine Root Respiration In Quercus Rubra Is Influenced By Multidimensional Trade-Offs In Root Trait Space,
2023
Michigan Technological University
Fine Root Respiration In Quercus Rubra Is Influenced By Multidimensional Trade-Offs In Root Trait Space, Emma L. Shedd
Dissertations, Master's Theses and Master's Reports
Economic theory is often applied to plant strategies, arguing that trade-offs exist between maximizing quick returns on investment within short lifespans or producing longer-lived tissues with slower returns. While these trade-offs are well-studied aboveground, their influence on belowground traits, including root respiration, remains unclear. Resource heterogeneity and symbioses with mycorrhizal fungi may complicate root trade-off axes beyond those predicted by economics theory alone. Investigating fine root trade-offs in Quercus rubra populations along a latitudinal gradient in the Midwest, USA, we identified two distinct axes of variation in root traits: one related to a potential “fungal symbiosis” trade-off and another representing …
The Art And Science Of Wood: From Pyrography To Termites And Wood Decomposition,
2023
Michigan Technological University
The Art And Science Of Wood: From Pyrography To Termites And Wood Decomposition, Joanna D. Walitalo
Dissertations, Master's Theses and Master's Reports
Wood is vital to many natural ecosystems, as it provides energy, nutrients, and habitat for organisms from the micro- to the macro- scale. Wood is also critical to humans for similar reasons, and can be an important medium of art and education. This dissertation addresses three diverse aspects of wood with the contexts of science, art, and education. First, we explored the impact of timber harvest techniques and site preparation on microbial wood decay and subterranean termite responses on a forest-stand scale. The amount of coarse woody debris removed post-harvest, coupled with the location and species of the test wood …
Two Research Perspectives On Sugar Maple Canopy Dieback In The Upper Great Lakes: A Decade Of Herbaceous Community Responses And A Survey Of Michigan Forest Managers,
2023
Michigan Technological University
Two Research Perspectives On Sugar Maple Canopy Dieback In The Upper Great Lakes: A Decade Of Herbaceous Community Responses And A Survey Of Michigan Forest Managers, Manuel Eduardo Anderson
Dissertations, Master's Theses and Master's Reports
Sugar maple canopy dieback has been reported in the upper Great Lakes since the mid-2000s. This thesis builds on research conducted to determine some of the underlying causes of canopy dieback, which include invasive earthworm impacts, with a view toward adaptations in management of northern hardwood forests in our region. The first chapter reports a study of understory communities in a subsection of forest health monitoring plots located in four national forests near Lake Superior. Based on plot assessments from 2010 and 2021, responses of plant community composition and traits to earthworm impacts and sugar maple canopy dieback were explored. …
Genome-Wide Identification And Characterization Of Auxin Response Factor (Arf) Gene Family Involved In Wood Formation And Response To Exogenous Hormone Treatment In Populus Trichocarpa,
2023
Northeast Forestry University
Genome-Wide Identification And Characterization Of Auxin Response Factor (Arf) Gene Family Involved In Wood Formation And Response To Exogenous Hormone Treatment In Populus Trichocarpa, Yingying Liu, Ruiqi Wang, Jiajie Yu, Shan Huang, Yang Zhang, Hairong Wei, Zhigang Wei
Michigan Tech Publications, Part 1
Auxin is a key regulator that virtually controls almost every aspect of plant growth and development throughout its life cycle. As the major components of auxin signaling, auxin response factors (ARFs) play crucial roles in various processes of plant growth and development. In this study, a total of 35 PtrARF genes were identified, and their phylogenetic relationships, chromosomal locations, synteny relationships, exon/intron structures, cis-elements, conserved motifs, and protein characteristics were systemically investigated. We also analyzed the expression patterns of these PtrARF genes and revealed that 16 of them, including PtrARF1, 3, 7, 11, 13–17, 21, 23, 26, 27, 29, 31, …
Forest Bathing Increases Adolescent Mental Well-Being And Connection To Nature: A Transformative Mixed Methods Study,
2023
Antioch University of New England
Forest Bathing Increases Adolescent Mental Well-Being And Connection To Nature: A Transformative Mixed Methods Study, Jennifer Keller
Antioch University Dissertations & Theses
Previous research has demonstrated that practicing forest bathing has significant positive effects on well-being. However, few studies have investigated whether forest bathing increases adolescent well-being despite the growing adolescent mental health crisis in the United States. Similarly, few studies have explored forest bathing’s impacts on connectedness to nature. Considering the ongoing environmental crisis, determining if forest bathing increases connectedness to nature is a critical expansion of forest bathing research, as connectedness to nature is linked to environmental care and concern. This study investigated the possibility that forest bathing, a nature-based mindfulness practice, could increase adolescent mental well-being and connectedness to …
Impacts Of Climate And Wildfire On Western Larch Regeneration,
2023
University of Montana, Missoula
Impacts Of Climate And Wildfire On Western Larch Regeneration, Spencer T. Vieira
Graduate Student Theses, Dissertations, & Professional Papers
Fire plays a critical role in forests of the western United States (US), but as wildfire and climate deviate from historical patterns, increasing fire activity may significantly alter forest ecosystems. To understand the impacts of changing climate and wildfire activity on conifer forests, we studied the impact of wildfire and annual post-fire climate on western larch (Larix occidentalis) regeneration. We destructively sampled 1651 seedlings from 57 sites within 32 fires that burned at moderate or high severity from 2000-2015 in the northwestern US. Using dendrochronological methods, we estimated germination years of seedlings to calculate annual recruitment rates. We …
The Effects Of Weather On Facilitating The Intensification And Collapse Of Bark Beetle Outbreaks In Ponderosa Pine Forests Of The Northern Rocky Mountains And The Black Hills,
2023
University of Montana
The Effects Of Weather On Facilitating The Intensification And Collapse Of Bark Beetle Outbreaks In Ponderosa Pine Forests Of The Northern Rocky Mountains And The Black Hills, Jordan T. Lestina
Graduate Student Theses, Dissertations, & Professional Papers
Bark beetles are a diverse family of insect herbivores, of which the most aggressive species can cause significant tree mortality, and are integral components of disturbance regimes in conifer dominated forests of North America. Recent drought events across the western U.S. have been broadly associated with the initiation of multiple bark beetle outbreaks in ponderosa pine forests during the last two decades. Changing weather conditions, such as those observed during the onset of drought, affect outbreak progression through their influence on bark beetle physiology and life history traits and the overall vigor and defensiveness of host trees. This study used …
Assessing The Impact Of Parallel Burnout Fires On Flank Rate Of Spread,
2023
University of Montana
Assessing The Impact Of Parallel Burnout Fires On Flank Rate Of Spread, Erik Borke
Graduate Student Theses, Dissertations, & Professional Papers
The effects of flank-parallel suppression fires on the local rate of spread (ROS) of freely burning headfires through fully cured homogeneous grass fuels are assessed. Data sets include: one thermal image stack of a prescribed burn recorded by drone, and a suite of simulation experiments carried out in Wildland Urban Interface Fire Dynamics Simulator (WFDS). A new approach to computing ROS, curvature proxy driven normals to convex polylines, was developed to carry out this analysis. ROS time series depicting flank acceleration of the prescribed burn and simulation experiments, observable under coarse and fine directional classification schemes respectively, are the primary …
The Birds And The Trees: Quantifying The Drivers Of Whitebark Pine Decline And Clark's Nutcracker Habitat Use In Glacier National Park,
2023
The University Of Montana
The Birds And The Trees: Quantifying The Drivers Of Whitebark Pine Decline And Clark's Nutcracker Habitat Use In Glacier National Park, Vladimir Kovalenko
Graduate Student Theses, Dissertations, & Professional Papers
Whitebark pine (Pinus albicaulis), recently listed as threatened under the Endangered Species Act, is in steep decline in Glacier National Park, Montana, USA due to the non-native pathogen Cronartium ribicola, causal agent of the fatal disease white pine blister rust. A sample of the park’s population suggests that approximately 70 percent of whitebark pines have died, while 65 percent of the remaining trees are infected. Using landscape and climate variables, we show how geographic location, elevation, aspect, solar radiation, relative humidity, and snowpack interact with tree diameter to affect mortality, disease incidence, cone production, and regeneration. We also examine how …
Establishing A Market Capacity And Economic Baseline For Forest Biomass Utilization In The Southern Cascade And Northern Sierra Nevada Mountain Range, California,
2023
Humboldt State University
Establishing A Market Capacity And Economic Baseline For Forest Biomass Utilization In The Southern Cascade And Northern Sierra Nevada Mountain Range, California, Clarke Stevenson
Cal Poly Humboldt theses and projects
Attempts to address wildfire risk and forest resilience have increased substantially over the last 20 years with specific interest in removing excess vegetation from stands, commonly referred to as “forest biomass”. However, the market capacity for and the economics of biomass utilization have been a limiting factor to achieving statewide goals for forest health and fire resilience. This thesis looks at the Southern Cascade and Northern Sierra Nevada biomass supply chain to benchmark current market capacity for biomass utilization through mapping and harvest record analysis. It also calculates the net revenue of biomass mobilization based on costs developed from a …
Investigating Tribal Co-Management Of Caifornia’S Public Lands,
2023
Cal Poly Humboldt
Investigating Tribal Co-Management Of Caifornia’S Public Lands, Zachary Joseph Erickson
Cal Poly Humboldt theses and projects
Collaborative management with Indigenous groups is becoming increasingly common as many Indigenous communities continue to assert their inherent rights to self-determination. Due to the removal from and dispossession of lands, tribes often rely on access to public properties for various uses including ceremonies and gathering of culturally important plants. Some believe that the absence of indigenous involvement has also led to a decline in both the quality and abundance of culturally important resources, as well as limited the intergenerational transfer of traditional ecological knowledge, or TEK. There is increasing momentum toward re-engaging tribes as stewards of their ancestral lands through …
Physical Characteristics And Fine Roots Within Duff Mounds Of Old-Growth Sugar And Jeffrey Pine In A Fire-Excluded Sierran Mixed-Conifer Forest,
2023
Cal Poly Humboldt
Physical Characteristics And Fine Roots Within Duff Mounds Of Old-Growth Sugar And Jeffrey Pine In A Fire-Excluded Sierran Mixed-Conifer Forest, Jules Bartley
Cal Poly Humboldt theses and projects
Fire exclusion has profoundly impacted frequent fire forests in western North America, disrupting fundamental ecological processes while leaving large, old pine trees vulnerable to drought, insects and disease, and fire. Forest managers want to increase the pace and scale of prescribed burning, yet heavy accumulations of organic material (duff mounds) at the bases of large pines can smolder for prolonged periods, damaging the cambium or consuming fine roots occupying the O horizon and/or upper mineral soil horizons. Increased duff mound depth is associated with greater mortality risk during prescribed fire, yet the biotic and abiotic drivers of duff mound accumulation …
Assessing The Recovery Of Forest Understory Vegetation After Clearcut Logging Across A 445-Year Chronosequence,
2023
Humboldt State University
Assessing The Recovery Of Forest Understory Vegetation After Clearcut Logging Across A 445-Year Chronosequence, Molly Smith Metok
Cal Poly Humboldt theses and projects
The conversion of natural forested lands to managed forests has reduced the amount of older, structurally diverse forests worldwide. In conifer forests of the Pacific Northwest (USA) – where the understory plant communities comprise only 1% of forest biomass but represent 90% of the plant species richness – the long-term impacts of timber harvesting are not fully understood. I used a chronosequence of forests in southwestern Oregon that ranged from 25 to 445 years of age to compare changes in plant communities in logged (i.e., managed) stands with that of stands in late succession and old growth conditions. The chronosequence …
Tree Biomass – A Fragile Carbon Storage In Old-Growth Birch And Aspen Stands In Hemiboreal Latvia,
2022
Latvian State Forest Research Institute
Tree Biomass – A Fragile Carbon Storage In Old-Growth Birch And Aspen Stands In Hemiboreal Latvia, Laura Ķēniņa, Didzis Elferts, Ieva Jaunslaviete, Endijs Bāders, Guntars Šņepsts, Āris Jansons
Aspen Bibliography
Birch (Betula pendula Roth, Betula pubescens Ehrh.) and European aspen (Populus tremula L.) stands dominate the deciduous forests of Northern Europe. Due to increasing forest protections, more deciduous stands will reach the old-growth stage. Thus, data on the carbon storage potential in such areas are essential. We aimed to establish a benchmark for carbon stocks of the main carbon pools in old-growth deciduous hemiboreal stands. Carbon pools were calculated from measurements in forty old-growth (104–148 years-old) deciduous stands in forests on fertile mineral soil. The carbon stock in these stands is distributed across tree biomass (~ 60%), mineral soil (~ …
Smokejumper Obituary: Rosenkrance, Lester Kenneth “Les” (Mccall 1961),
2022
Eastern Washington University
Smokejumper Obituary: Rosenkrance, Lester Kenneth “Les” (Mccall 1961), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Newton, Roger (Cave Junction 1951),
2022
Eastern Washington University
Smokejumper Obituary: Newton, Roger (Cave Junction 1951), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Aspen Leaves As A "Chemical Landscape" For Fungal Endophyte Diversity - Can Nitrogen And Herbivory Shape The Community Composition In Controlled Conditions?,
2022
Umeå University
Aspen Leaves As A "Chemical Landscape" For Fungal Endophyte Diversity - Can Nitrogen And Herbivory Shape The Community Composition In Controlled Conditions?, Johanna Witzell, Vicki Huizu Guo Decker, Marta Agostinelli, Carmen Romeralo Tapia, Michelle Cleary, Benedicte Riber Albrectsen
Aspen Bibliography
The endophytic microbiome may influence the ecological performance of plants, including forest trees. Various abiotic and biotic factors may shape the endophyte communities directly but also indirectly, by modifying the quality of host plants as a substrate. We hypothesized that potentially antifungal or fungistatic condensed tannins (CTs) would determine the quality of aspen (Populus tremula) leaves as a substrate for endophytic fungi. By subjecting the plants to nitrogen fertilization (N) or herbivory (H; leaf beetles) we aimed to change the internal “chemical landscape”, especially the CT levels, in aspen leaves. We expected that this would lead to changes in the …
Smokejumper Obituary: Hatch, Huntington Talbott (Missoula 1953),
2022
Eastern Washington University
Smokejumper Obituary: Hatch, Huntington Talbott (Missoula 1953), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Indicadores De Sustentabilidad Vba Mesmis,
2022
Universidad de Cundinamarca
Indicadores De Sustentabilidad Vba Mesmis, Geovanny Andres Martinez Jimenez
Ciencias Administrativas, Económicas y Contables
El presente libro se ha diseñado con el propósito de que el lector tenga una experiencia satisfactoria al momento de emplear los indicadores VBA MESMIS. Por tanto, el documento se estructura de manera minuciosa en dos apartados; el primero que trata acerca de los criterios de diagnóstico, en el que se plantea un ejemplo con información de tres unidades productivas, con el fin de i) desarrollar los indicadores correspondientes a los criterios; ii) conocer el nivel de desempeño de los indicadores; iii) realizar un análisis general y proponer recomendaciones para el fortalecimiento de la sustentabilidad de las unidades productivas; en …
