Forest Sciences Commons^™

Smokejumper Obituary: Thornton, Dell Harold (North Cascades 1966), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Putnam, James Eugene (North Cascades 1948), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Dunnigan, Dan Gerald (Redmond 1969), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Adams, Larry R. (Missoula 1967), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Gutkoski, Joseph J. "Joe" (Missoula 1950), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Observations Of Post-Wildfire Landcover Trends In Boreal Alaska Using A Suite Of Remote Sensing Approaches, Eric John Deutsch

Theses - ALL

Wildfires are a common occurrence in the boreal ecosystems of the Pacific Northwest. Studies suggest that anthropogenic climate change has fostered more frequent and higher severity fires in recent decades in these forests, which may result in substantial changes in vegetation structure and ecosystem functioning. However, large-scale studies examining the linkages between changing boreal wildfire regimes and vegetation structure have historically been limited in spatial scope due to the broad area and inaccessibility of many boreal regions, including the Alaskan interior. The development and advancement of satellite remote sensing instruments and geospatial analysis techniques provide researchers with unmatched abilities to …

Abundance And Distribution Of The Forest Cockroaches In Different Algerian Ecosystems, Zakaria Hedjouli, Wafa Habbachi, Fatiha Masna, Saliha Benhissen, Sarra Habbachi, Abdelmadjid Yagoub Asloum, Abdelkrim Tahraoui

Journal of Bioresource Management

Forests have many insect species that are unique to biodiversity and play a crucial role in the functioning of ecosystems. Forest cockroaches are the best example of forest litter insects, which also help decompose fallen leaves. The composition of the Blattoptera fauna can vary from one region to another, depending on the habitat and numerous biotic and abiotic factors In order to study the diversity, abundance, and distribution of forest cockroaches in different Algeria ecosystems, we have selected four sites from three Wilayas: Senalba (Djelfa), Ain achir (Annaba), Seraidi (Annaba), and Lehnaya (El-taref). These sites are classified into two distinct …

Multi-Scale Environmental Conditions Associated With Shade-Tolerant Conifer Regeneration In Forest Park, Portland, Oregon, Matthew Cook

Dissertations and Theses

Forest Park is a 5,100-acre urban forest located in Portland, Oregon, that has been impacted by various anthropogenic stressors including logging, fragmentation, invasive species, air pollution and recreation use due to its proximity to the urban environment. This legacy of land use coupled with natural disturbances has resulted in changes to forest structure, composition, and function--threatening the long-term sustainability of the park. Past research in Forest Park has identified a lack of regenerating shade-tolerant conifers, particularly western hemlock and western red cedar species, in the section of the park closest to the city. Typically, western hemlock and western red cedar …

Urban Forestry Management Plan: Canopy And Forest Structure Analysis Summary Report, Diamond Head Consulting

Sehome Hill Arboretum

The City of Bellingham is a community of more than 90,000 residents that stretches over 28 square miles, with an additional 8 square miles of Urban Growth Area (UGA). The City manages an expansive urban forest which includes several thousands of acres of forest and thousands of street trees. Bellingham’s urban forest is a valued asset within the community, as recognized in the City’s Comprehensive Plan vision and its Tree City USA status.

In this context, the City is creating an Urban Forestry Management Plan (UFMP) as a strategic plan to help maintain a healthy and desirable urban forest through …

Dynamic Thermal Properties Estimation Using Sensitivity Coefficients For Rapid Heating Process, Anbuhkani Muniandy, Patnarin Benyathiar, Dharmendra K. Mishra, Ferhan Ozadali

Department of Food Science Faculty Publications

Thermal conductivity determination of food at temperatures > 100 °C still remains a challenge. The objective of this study was to determine the temperature-dependent thermal conductivity of food using rapid heating (TPCell). The experiments were designed based on scaled sensitivity coefficient (SSC), and the estimated thermal conductivity of potato puree was compared between the constant temperature heating at 121.10 °C (R12B10T1) and the rapid heating (R22B10T1). Temperature-dependent thermal conductivity models along with a constant conductivity were used for estimation. R22B10T1 experiment using the k model provided reliable measurements as compared to R12B10T1 with thermal conductivity values from 0.463 ± 0.011 W …

Climate Change And Forest Management Impacts On Tree Growth And Physiology, Kelly French

Electronic Theses and Dissertations

Projected changes in temperature and precipitation are expected to lead to declines in many forest tree species across the Northeastern United States. Red spruce (Picea rubens) and balsam fir (Abies balsamea) are two of the most common tree species in Maine that make up about 5.5 million acres of the state’s forest land. As such, future climate conditions pose a major challenge for management of these species, and it is unclear how management may mitigate or exacerbate the negative effects of climate change. Therefore, in this study we investigated how thinning to release suppressed red spruce influences understory microclimate, and …

Tree Responses To Moderate And Extreme Drought In The Northeastern United States, Ruth A. Van Kampen

Electronic Theses and Dissertations

Climate change is expected to lead to novel drought conditions in the Northeastern United States. Therefore, experimental studies that mimic these conditions are crucial to understand the potential impact on forests. Further, recent large scale dendrochronological studies suggest that spring and summer droughts may immediately impact tree growth while fall droughts may cause delayed impacts on growth the following growing season. Therefore, in this study, we investigated the impacts of six-week-long spring, summer, and fall droughts on the physiology and intra-annual growth on 288 saplings of six tree species native to the Northeastern United States. These species (deciduous broadleaf angiosperms, …

Forest Phenology In Maine: Trends And Drivers Over The Past Two Decades And Implications For Resource Managers, Valeria Briones

Electronic Theses and Dissertations

Rapid climate change in recent decades has impacted forest, coastal, and social systems globally. In the northeastern U.S., alterations to the seasonal timing and duration of phenology cycles are a direct result of increasing temperatures, and monitoring these changes serves as a valuable indicator to analyze the impacts of climate change. Furthermore, increasing temperatures can influence when and how visitors recreate in natural landscapes. In the past decade, outdoor spaces have seen an increase in the number of visitors, partly as a result of climate change, that has influenced how resource managers and tourism suppliers plan for and respond to …

Understanding The Adhesion Mechanism In Mycelium-Assisted Wood Bonding, Wenjing Sun

Electronic Theses and Dissertations

The increasing environmental awareness has led to an increased interest in developing more sustainable materials as alternatives to petroleum-derived products. Among different nature-based products, fungal-mycelium-based bio-composites have gained considerable attention in various applications. Multiple materials with different densities and structures and potential applications can be fabricated by inoculating filamentous white-rot fungi in lignocellulosic materials and other substrates. Different from lower-density as-grown foam-like mycelium composites, higher-density mycelium-lignocellulosic panels have the potential to replace commercial particleboard and fiberboard bonded by petroleum-based resins. This kind of composite can be produced by directly adding heat and pressure to the low-density foams or by assembling …

Remote Sensing Identification Of Black Ash (Fraxinus Nigra) In Maine Via Hyper- And Multi-Spectral Imagery, John W. Furniss

Electronic Theses and Dissertations

North American ash species (Fraxinus spp.) are under dire threat from the invasive pest, emerald ash borer (Agrilus planipennis, EAB). Black ash (F. nigra) has shown no resistance to EAB while its cultural and ecological importance render it irreplaceable. Traditional field forestry techniques are not suitable for the large-scale identification of individual black ash trees to facilitate conservation, thus necessitating the need for other identification and classification techniques. The objective of this research is to develop remote sensing techniques that can be used to identify ash trees, in particular black ash, at the individual tree level using both hyperspectral and …

Interspersed Denuded Zone (Idz): How Patchy Leaf Litter Dynamics In A Buckthorn-Invaded Urban Woodland Can Affect Microarthropod Species Richness, Angela Stenberg

DePaul Discoveries

Biodiversity loss may serve as a key diagnostic of the Anthropocene. An important driver of this loss is by means of invasive species. In this study of a forest preserve in Chicago, Illinois we examined Interspersed Denuded Zones (IDZs for short), which are areas of patchy leaf litter in invaded forests caused in this case by the rapid decomposition of litter from buckthorn (Rhamnus cathartica). We characterized the leaf litter mass in IDZs and enumerated litter-inhabiting microarthropod populations. We found that plots of high buckthorn density are associated with IDZs: there was significantly less leaf litter mass in …

Population Structure Analysis Of The Endangered Oak Quercus Brandegeei, Carolyn Brinckwirth

DePaul Discoveries

As humans continue to impact landscapes and ecosystems throughout the entire world, many plant and animal species have faced major changes in their environments. The rare endemic oak, Quercus brandegeei, is one such endangered species located in the Sierra La Laguna mountains of Baja California Sur, Mexico. This tree occurs solely on the ephemeral riverbeds of the mountains, which are inundated seasonally by hurricane waters. It is important to understand the fundamental characteristics, like spatial distribution, of Q. brandegeei in order to develop restorative management practices to protect this tree against extinction. Determining the geographic distribution of a species …

Modeling Reproduction Influencers Of An Endangered Oak, Camila Cortez

DePaul Discoveries

The endemic oak, Quercus brandegeei has been labeled as endangered by the IUCN Red List of Endangered Species due to its limited genetic diversity and lack of regeneration. The oak (Quercus) species is a keystone species in many parts of the world and has been facing various challenges to their survival (Westwood 2017) making efforts to support and protect endemic oaks all the more ecologically and socially imperative. There are challenges to identifying threats as there are many unknown characteristics of Q. brandegeei’s biology that are essential to carrying out conservation efforts. To develop a greater understanding of …

Determining The Novel Pathogen Neodothiora Populina As The Causal Agent Of The Aspen Running Canker Disease In Alaska, Loretta M. Winton, Gerard C. Adams, Roger W. Ruess

Aspen Bibliography

Neodothiora populina Crous, G.C. Adams & Winton was determined to be a new pathogen of trembling aspen (Populus tremuloides) growing in Alaska, based on completion of Koch’s Postulates in replicated forest and growth chamber inoculation trials. The pathogen is responsible for severe damage and widespread rapid mortality of sapling to mature aspen (≥ 80 years) in the boreal forests of interior Alaska, due to large diffuse annual (1–2 years) cankers. Isolation of the pathogen was challenging, and identification based on cultural characters was difficult. Fruiting bodies were not found on wild diseased trees, but erumpent pycnidia were found …

Incorporation Of Biochar To Improve Mechanical, Thermal And Electrical Properties Of Polymer Composites, Chinmoyee Das, Sandeep Tamrakar, Alper Kiziltas, Xinfeng Xie

Michigan Tech Publications

The strive for utilization of green fillers in polymer composite has increased focus on application of natural biomass-based fillers. Biochar has garnered a lot of attention as a filler material and has the potential to replace conventionally used inorganic mineral fillers. Biochar is a carbon rich product obtained from thermochemical conversion of biomass in nitrogen environment. In this review, current studies dealing with incorporation of biochar in polymer matrices as a reinforcement and conductive filler were addressed. Each study mentioned here is nuanced, while addressing the same goal of utilization of biochar as a filler. In this review paper, an …