Forest Sciences Commons^™

Smokejumper Obituary: Christensen, James Gordon (Missoula 1961), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Bison Influences On Composition And Diversity Of Riparian Plant Communities In Yellowstone National Park, J. Boone Kauffman, Dian Lyn Cummings, Cimarron Kauffman, Robert L. Beschta, Jeremy Brooks, Keeley Macneill, William J. Ripple

Aspen Bibliography

Riparian zones are among the most biologically diverse ecosystems in the Intermountain West, USA, and provide valuable ecosystem services, including high rates of biotic productivity, nutrient processing, and carbon storage. Thus, their sustainability is a high priority for land managers. Large ungulates affect composition and structure of riparian/stream ecosystems through herbivory and physical effects, via trailing and trampling. Bison (Bison bison) in Yellowstone National Park (YNP) have been characterized as "ecosystem engineers" because of their demonstrated effects on phenology, aboveground productivity of grasses, and woody vegetation structure. Bison have greatly increased in numbers during the last two decades …

Smokejumper Obituary: Scott, Jonathan Lavon "Scotty" (Mccall 1948), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Kirkpatrick, John Roy (Grangeville 1962), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Holtet, John A. (Missoula 1961), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Dominant Ecological Processes And Plant Functional Strategies Change During The Succession Of A Subtropical Forest, Taotao Han, Hai Ren, Dafeng Hui, Yanpeng Zhu, Hongfang Lu, Qingfeng Guo, Jun Wang

Biology Faculty Research

Understanding community assembly process could enhance forest conservation and restoration, while which dominant ecological process drives the community assembly during forest succession is still controversial. In this study, the phylogeny-based and functional trait-based indicators were used to investigate the community assembly processes during forest succession in southern China. 30 dominant species and 33 functional trait indicators related to plant competition, reproduction, and defense strategies, 7 environmental factors related to light availability and soil nutrients, and species richness were selected to explore the dominant ecological processes during succession via Monte Carlo method, structural equation model, multiple linear regression, and one-way …

Properties And Emissions Of Three-Layer Particleboards Manufactured With Mixtures Of Wood Chips And Partially Liquefied Bark, Wen Jiang, Stergios Adamopoulos, Reza Hosseinpourpia, Thomas Walther, Sergej Medved

Michigan Tech Publications, Part 1

Partial liquefaction of residual biomass shows good potential for developing new materials suitable for making bio-based composites. Three-layer particleboards were produced by replacing virgin wood particles with partially liquefied bark (PLB) in the core or surface layers. PLB was prepared by the acid-catalyzed liquefaction of industrial bark residues in polyhydric alcohol. The chemical and microscopic structure of bark and residues after liquefaction were evaluated by means of Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM), while the particleboards were tested for their mechanical and water-related properties, as well as their emission profiles. Through a partial liquefaction process, some …

Comparison Of High-Resolution Naip And Unmanned Aerial Vehicle (Uav) Imagery For Natural Vegetation Communities Classification Using Machine Learning Approaches, Parth Bhatt, Ann Maclean

Michigan Tech Publications, Part 1

To map and manage forest vegetation including wetland communities, remote sensing technology has been shown to be a valid and widely employed technology. In this paper, two ecologically different study areas were evaluated using free and widely available high-resolution multispectral National Agriculture Imagery Program (NAIP) and ultra-high-resolution multispectral unmanned aerial vehicle (UAV) imagery located in the Upper Great Lakes Laurentian Mixed Forest. Three different machine learning algorithms, random forest (RF), support vector machine (SVM), and averaged neural network (avNNet), were evaluated to classify complex natural habitat communities as defined by the Michigan Natural Features Inventory. Accurate training sets were developed …

Forest Ecosystem Properties Emerge From Interactions Of Structure And Disturbance, J. Christina Mitchell, Daniel M. Kashian, Xiongwen Chen, Stella Cousins, David J. Flaspohler, Daniel S. Gruner, Jeremy S. Johnson, Thilina D. Surasinghe, Jenny Zambrano, Brian Buma

Michigan Tech Publications, Part 1

Forest structural diversity and its spatiotemporal variability are constrained by environmental and biological factors, including species pools, climate, land-use history, and legacies of disturbance regimes. These factors influence forest responses to disturbances and their interactions with structural diversity, potentially creating structurally mediated emergent properties at local to continental spatial scales and over evolutionary time. Here, we present a conceptual framework for exploring the emergent properties that arise from interactions between forest structural diversity and disturbances. We synthesize and present definitions for key terms, including emergent property, disturbance, and resilience, and highlight various types and examples of emergent properties, such as …

Genomic Underpinnings Of Population Persistence In Isle Royale Moose, Christopher C. Kyriazis, Annabel C. Beichman, Kristin Brzeski, Sarah Hoy, Rolf O. Peterson, John A. Vucetich, Leah Vucetich, Kirk E. Lohmueller, Robert K. Wayne

Michigan Tech Publications, Part 1

Island ecosystems provide natural laboratories to assess the impacts of isolation on population persistence. However, most studies of persistence have focused on a single species, without comparisons to other organisms they interact with in the ecosystem. The case study of moose and gray wolves on Isle Royale allows for a direct contrast of genetic variation in isolated populations that have experienced dramatically differing population trajectories over the past decade. Whereas the Isle Royale wolf population recently declined nearly to extinction due to severe inbreeding depression, the moose population has thrived and continues to persist, despite having low genetic diversity and …

Tree Stem Volume Estimation From Terrestrial Lidar Point Cloud By Unwrapping, Zhongming An, Robert E. Froese

Michigan Tech Publications, Part 1

Estimating the volume of standing trees is a fundamental concern in forestry and is typically accomplished using one or more measurements of stem diameter along with formulae that assume geometric primitives. In contrast, technologies such as terrestrial Light Detection And Ranging (LiDAR) can record very detailed spatial information on the actual surface of an object, such as a tree bole.We present a method using LiDAR that provides accurate volume estimates of tree stems, as well as 2D rasters that display details of stem surfaces, which we call the “unwrapping method.” This method combines the concepts of cylinder fitting, voxelization, and …

Smokejumper Obituary: Tucker, William Dinwiddie “Bill” (Missoula 1950), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Structuring Life After Death: Plant Leachates Promote Co2 Uptake By Regulating Microbial Biofilm Interactions In A Northern Peatland Ecosystem, Allison R. Rober, Allyson J. Lankford, Evan Kane, Merritt R. Turetsky, Kevin H. Wyatt

Michigan Tech Publications, Part 1

Shifts in plant functional groups associated with climate change have the potential to influence peatland carbon storage by altering the amount and composition of organic matter available to aquatic microbial biofilms. The goal of this study was to evaluate the potential for plant subsidies to regulate ecosystem carbon flux (CO2) by governing the relative proportion of primary producers (microalgae) and heterotrophic decomposers (heterotrophic bacteria) during aquatic biofilm development in an Alaskan fen. We evaluated biofilm composition and CO2 flux inside mesocosms with and without nutrients (both nitrogen and phosphorus), organic carbon (glucose), and leachates from common peatland plants (moss, sedge, …

Smokejumper Obituary: Klein, Buster Victor (Redding 1969), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: King, Thomas Patrick (North Cascades 1979), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Johnson, Dean Bruce (Redmond 1974), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Jaderlund, Loren Dale (North Cascades 1958), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Kloepfer, James Ramon "Jim" (Redding 1957), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Johnson, Duane William (Redding 1967), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Arnett, Edward M. (Missoula 1945), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Flake, Harold William (Idaho City 1961), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

The World Of Underground Ecology In A Changing Environment, Elsa Abs, Moira Hough

Michigan Tech Publications, Part 1

This special feature presents state-of-the-art soil ecological science and was sparked following the 2-day long online live event entitled “Ecology Underground” during the Ecological Society of America annual meeting of 2020. Here, we, the co-guest-editors of this special feature, present this body of research in context of the current state of the field. This issue highlights that we are currently in a hot time for microbial research in soil science. Specifically, we find that two themes emerge from this corpus as key next questions to answer to move the field forward. How do microbial processes scale up in space and …

Dinitrogen Emissions Dominate Nitrogen Gas Emissions From Soils With Low Oxygen Availability In A Moist Tropical Forest, Maya Almaraz, Peter M. Groffman, Whendee L. Silver, Steven J. Hall, Yang Lin, Christine S. O'Connell, Stephen Porder

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Lowland tropical forest soils are relatively N rich and are the largest global source of N₂O (a powerful greenhouse gas) to the atmosphere. Despite the importance of tropical N cycling, there have been few direct measurements of N₂ (an inert gas that can serve as an alternate fate for N₂O) in tropical soils, limiting our ability to characterize N budgets, manage soils to reduce N₂O production, or predict the future role that N limitation to primary productivity will play in buffering against climate change. We collected soils from across macro- and micro-topographic gradients …

Smokejumper Obituary: Harris, Gordon Leon (Idaho City 1969), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Macpherson, Cole L. (Missoula 1955), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Linking Soil Properties To Originally Wooded And Afforested Areas, Ashton A. Crowe, Matthew Laun

Posters-at-the-Capitol

Linking Soil Properties to Originally Wooded and Afforested Areas

Matthew Laun, Ashton Crowe

Mentor: I. P. Handayani

Hutson School of Agriculture Murray State University, KY, USA

Abstract

Afforestation, adding an artificial forest to a piece of land that has been barren of trees for a significant amount of time, has some seriously huge impacts on the environment. These effects can be seen as an increase in the soil organic matter, a decrease in compaction, and enhancement of porosity. Therefore, the soil can support more diverse microbes and fungal communities leading to better micro and macro nutrient transfers between plants. This …

Assessment Of Carbon Productivity Dynamics In Aspen Stands Under Climate Change Based On Forest Inventories In Central Siberia, Andrey Andreevich Vais, Valentina Valerievna Popova, Alina Andreevna Andronova, Viktor Nikolaevich Nemich, Artem Gennadievich Nepovinnykh, Pavel Vladimirovich Mikhaylov

Aspen Bibliography

The aim of the present research was to study the dynamics of growth and conditions of aspen stands under climate change, according to different periods of forest inventory. The study was conducted in modal aspen forests growing in the subtaiga/forest steppe region of Central Siberia. Aspen forests grow intensively at young age, which allows them to realize maximum carbon sequestration potential. The research was based on forest inventory data from 1972, 1982, 2002, and 2021 (the study was conducted on a limited territory). There was a steady increase in temperatures in the growing season from 1982 to 2002. The amount …

Avian Community Response To Oak Savanna Management In West Michigan, Abigail Elaine Fischer, Paul W. Keenlance, Alexandra B. Locher, Joseph J. Jacquot

Masters Theses

In the midwestern United States, oak savanna ecosystems have experienced steep declines over the past century due to loss of disturbances and changes in land use. This loss coincides with the decline in avian communities across North American and has negatively impacted taxa that associate with open vegetation cover types. Expanding efforts to restore and manage oak savanna ecosystems has resulted in increased open habitat which has positively impacted these avian communities, resulting in increased species diversity. While numerous studies within the Midwest have observed similar results, there have been no studies in Michigan that have formally assessed the impact …

Degradation Assessment Of Archaeological Oak (Quercus Spp.) Buried Under Oxygen-Limited Condition, Amir Ghavidel, Amin Jorbandian, Miklos Bak, Jana Gelbrich, Jeffrey J. Morrell, Ion Sandu, Reza Hosseinpourpia

Michigan Tech Publications, Part 1

The biological deterioration of archaeological wood under oxygen-limited conditions varies due to the limited activities of microorganisms. It is essential to expand the knowledge of the degradation types and the status of archaeological monuments for selecting the proper consolidates. The physical, chemical, and anatomical properties of approximately 600-650 year old archaeological oak collected from an archaeological site in Iasi-Romania were analysed to assess the quality and to identify the degradation types. The results were compared with similar tests on recently-cut oak. X-ray photoelectron spectroscopy (XPS) revealed the presence of more lignin-related peaks in the archaeological oak, which likely reflected the …

Determining Puma Habitat Suitability In The Eastern Usa, Veronica Yovovich, Nathaniel Robinson, Hugh Robinson, Michael J. Manfredo, Shelby Perry, Jeremy T. Bruskotter, John Vucetich, Luis Aníbal Solórzano, Lydia A. Roe, Alison Lesure, Jamie Robertson, Tom Bulter, L. Mark Elbroch

Michigan Tech Publications, Part 1

Pumas (Puma concolor) were eliminated from most of the eastern USA a century ago. In the past couple of decades, their recovery in the West has increased puma dispersal into the Midwest, with some individuals even traveling to the East Coast. We combined published expert opinion data and a habitat suitability index in an analysis that identified 17 areas in the Upper Midwest, Ozarks, Appalachia, and New England that could potentially host puma populations in the future. Thirteen of these were larger than 10,000 km2 and so likely to ensure a puma population’s long-term genetic health. Further, we quantified patch …