Forest Sciences | Open Access Articles | Digital Commons Network™

Chemical Analysis Data, Charlotte A. Shade, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Data Files

Hardness, Alkalinity, Orthophosphate, Soluble reactive phosphorus, Total suspended solids, Dissolved organic carbon, Total Kjeldahl nitrogen, Nitrate:Nitrite ratio

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Aquatic Fine Woody Debris, Erin C. Rowekamp, Julia I. Chapman, Ryan W. Mcewan

Data Files

No abstract provided.

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Prototype Data, Margaret E. Maloney, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Data Files

No abstract provided.

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Lonicera Maackii Leaf Feeding Tests: Initial Mass, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Data Files

Lymnaea stagnalis, Hyalella Azteca, and Allocapnia spp.

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Lonicera Maackii Leaf Feeding Tests: Physicochemical Data, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Data Files

Lymnaea stagnalis, Hyalella Azteca, and Allocapnia spp.

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Lonicera Maackii Flower Leachate Toxicity: Survival And Mass, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Data Files

In-stream (in situ) and in-lab microcosm trials using Hyalella Azteca and Anthopotamus verticis

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Leaf Litter Basket, Erin C. Rowekamp, Taylor M. Buskey, Julia I. Chapman, Ryan W. Mcewan

Data Files

No abstract provided.

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Seedling, Erin C. Rowekamp, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Data Files

No abstract provided.

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Characteristics Of Activated Carbons Produced From Herbaceous Biomass Feedstock, Oluwatosin Jerry Oginni

Graduate Theses, Dissertations, and Problem Reports (ETD)

Energy security and environmental protection are at the forefront of research due to the forecasted depletion of fossil fuel reserves and the growing concern of its adverse environmental impacts. The use of renewable sources for energy applications has centered on the use of biomass feedstocks and this include from herbaceous, woody, agricultural waste, forest residues and municipal wastes. The thermochemical conversion (pyrolysis) of these biomass feedstocks has potential to produce liquid fuel, a solid residue (biochar) and non-condensable gas. The biochar is primarily composed of renewable porous carbon and other inorganic compounds. The biochar is used for soil amendment, adsorption …

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Aquatic Coarse Woody Debris, Erin C. Rowekamp, Julia I. Chapman, Ryan W. Mcewan

Data Files

No abstract provided.

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Biofilm Ash Free Dry Mass And Chlorophyll A, Kevin W. Custer, Sean D. Mahoney, Mitchell J. Kukla, Corey Kuminecz, Joseph Murphy, Julia I. Chapman, Ryan W. Mcewan

Data Files

No abstract provided.

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Drivers Of Post-Fire Vascular Plant Regeneration In The Conifer-Dominated Boreal Forest Of Southern Northwest Territories, Alison White

Theses and Dissertations (Comprehensive)

In recent years, climate warming has led to an increase in the severity and frequency of naturally occurring fires in boreal ecosystems globally. In 2014, an unprecedented 3.4 million hectares of boreal forest burned in the Northwest Territories (NWT). While much research has focused on post-fire succession of serotinous tree species such as Picea mariana (black spruce) and Pinus banksiana (jack pine), the understory community of vascular plants play an important role in ecosystem functioning but less is known about the response of this component of the system to changing fire regimes. Regeneration strategies such as the ability to resprout …

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A Comparison Of Two Methods Of Quantifying Mating Success In Low Density Gypsy Moth (Lymantria Dispar) Populations, Alexandra Barry, Hannah Byrne, Derek M. Johnson

Undergraduate Research Posters

The gypsy moth (Lymantria dispar) is a defoliating pest native to Europe and invasive to North America. The gypsy moth is subject to depressed mating success in low density populations, which may restrict spread of the forest pest. Research focusing on gypsy moth density as it relates to mating behavior has often used counts of males caught in pheromone-baited delta traps as a proxy to estimate the probability of female mating success. The purpose of this project was to determine whether pheromone trap counts provide accurate estimates of female mating success probability, by comparing data gathered from pheromone-baited …

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Investigating The Ecology Of A Rare Species On St. John, Usvi: Reintroducing Solanum Conocarpum In Light Of Climate Change, Cecilia Rogers

Senior Honors Projects, 2010-2019

Approximately two thirds of St. John is National Park territory. However, the land has been threatened with tourism and development, greatly impacting island biodiversity. One species that may become extinct due to this degradation is Solanum conocarpum. S. conocarpum is a rare shrub, endemic to the dry tropical forests of St. John, USVI. This plant is a species of conservation concern and is one of very few native and endemic plants on this island. Very little is known about the ecology and reproduction of S. conocarpum. Most plants are found on the southern half of the island. Recent observations …

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Competition Issues In The Chicken Meat, Chicken Egg, And Pork Markets Of The Philippines, Cenon D. Elca, Prudenciano U. Gordoncillo, Charis Mae T. Neric, Janine P. Curibot

Journal of Public Affairs and Development

This study probed the supply chains of the Philippine markets for chicken meat, chicken egg, and pork; and identified several competition issues that present or may potentially lead to violations of the Philippine Competition Act (PCA). In the chicken meat supply chain, vertical integration in the production segment through contract growing was found to likely lead to an oligopolistic market and possible abuse of dominant position, one of the prohibited acts under PCA. There were reports that such abuse may already be in play in its transportation and consolidation segments. The practice in livestock auction markets to simply formalize pre-arranged …

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Overcoming Challenges In Earthquake Preparedness In Panay Island In The Philippines Through Good Governance, Ramil B. Atando

Journal of Public Affairs and Development

Disaster risk reduction is a major concern especially among developing and underdeveloped countries. This case study reviewed the governance strategies in place to manage the potential impacts of a magnitude 7.0 earthquake in Panay Island, which is home to more than 2 million inhabitants. National and local government offices engaged in disaster management provided the secondary data needed for this case study. Key informant interviews were conducted to collect salient information on governance strategies employed such as on fund sources and major players. Triangulation was employed to enhance the analysis and credibility of this research. Among the key findings is …

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Organizational Identification Of Personnel During A Major Restructuring: The Case Of The Agricultural Training Institute, Andrew D. Gasmen, Rowena Dt. Baconguis, Maria Ana T. Quimbo

Journal of Public Affairs and Development

Earlier studies found that extension organizations enjoy strong organizational identification (OID) among their personnel. However, organizational change often negatively impacts on personnel OID and subsequently on organizational performance. To explore these two contrasting views in the Philippine context, this study was conducted to examine the personnel OID of the Agricultural Training Institute (ATI), the country’s lead extension agency, while undergoing rationalization. A survey was conducted among staff members of ATI Central Office and Region IV-A Training Center. Responses were analyzed along OID’s cognitive and affective components in different demographic and employment characteristics and comparatively in five categories of personnel. Results …

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Knowledge And Practices On Family Development Of 4ps Beneficiaries In Camarines Sur, Philippines, Stanley O. Dy

Journal of Public Affairs and Development

The study assessed the knowledge and practices on family development among the 4Ps beneficiaries in Camarines Sur. Research methods employed were survey, KIIs, and review of secondary data. The data gathered from the 169 randomly selected respondents were analyzed through descriptive statistics, particularly frequency, percentage, and mean. Most topics discussed during family development sessions relate to disaster risk reduction and management, according to 27% of the respondents. Other topics were on fire, gardening, barangay improvement, community, and nutrition. Almost all respondents indicated that the family development sessions (e.g., proper parenting) are effective, relevant, interesting, and are easy to apply. They …

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The Role Of Environmental Filtering In Structuring Appalachian Tree Communities: Topographic Influences On Functional Diversity Are Mediated Through Soil Characteristics, Julia I. Chapman, Ryan W. Mcewan

Biology Faculty Publications

Identifying the drivers of community assembly has long been a central goal in ecology, and the development of functional diversity indices has provided a new way of detecting the influence of environmental gradients on biotic communities. For an old-growth Appalachian forest, we used path analysis to understand how patterns of tree functional diversity relate to topography and soil gradients and to determine whether topographic effects are mediated through soil chemistry. All of our path models supported the idea of environmental filtering: stressful areas (high elevation, low soil moisture, low soil nutrients) were occupied by communities of low functional diversity, which …

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Persistence Of Stream Restoration With Large Wood, Redwood National And State Parks, California, Diedra L. Rodriguez

Cal Poly Humboldt theses and projects

The conservation and recovery of anadromous salmonids (Oncorhynchus sp.) depend on stream restoration and protection of freshwater habitats. In-stream large wood dictates channel morphology, increases retention of terrestrial inputs such as organic matter, nutrients and sediment, and enhances the quality of fish habitat. Historic land use/land cover changes have resulted in aquatic systems devoid of large wood. Restoration by placement of large wood jams is intended to restore physical and biological processes. An important question for scientists and restoration managers, in addition to the initial effectiveness of restoration, is the persistence and fate of large wood installations. In this …

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Within-Fire Patchiness Associated With Prescribed Burning In The Northern Jarrah Forests Of Western Australia, Zigourney Nielsen

Theses: Doctorates and Masters

There is growing understanding of the importance of landscape mosaics and heterogeneity for biodiversity outcomes in Western Australia. However, there is limited information on the patchiness (spatial configuration of unburnt and burnt patches which occur at a range of spatial scales) within the perimeter of a single prescribed burn. Of particular concern is the idea that prescribed burning operations, carried out under very restricted weather and environmental conditions, can lead to structural and floristic homogenization of the area within a burn perimeter. This may be evident as reduced post-fire vegetation patchiness. Western Australian Jarrah (Eucalyptus marginata) forests are managed to …

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Natural And Anthropogenic Drivers Of Tree Evolutionary Dynamics, Brandon M. Lind

Theses and Dissertations

Species of trees inhabit diverse and heterogeneous environments, and often play important ecological roles in such communities. As a result of their vast ecological breadth, trees have become adapted to various environmental pressures. In this dissertation I examine various environmental factors that drive evolutionary dynamics in threePinusspecies in California and Nevada, USA. In chapter two, I assess the role of management influence of thinning, fire, and their interaction on fine-scale gene flow within fire-suppressed populations of Pinus lambertiana, a historically dominant and ecologically important member of mixed-conifer forests of the Sierra Nevada, California. Here, I find evidence …

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Highly Informative Ssr Genotyping Reveals Large Genetic Diversity And Limited Differentiation In European Larch (Larix Decidua) Populations From Romania, Pietro Gramazio, Ioana M. Plesa, Alina M. Truta, Adriana F. Sestras, Santiago Vilanova, Mariola Plazas, Oscar Vicente, Monica Boscaiu, Jaime Prohens, Radu E. Sestras

Turkish Journal of Agriculture and Forestry

European larch (Larix decidua) is naturally distributed at high elevations in Central Europe. Romanian populations of L. decidua are scattered in different areas of the country. In this study, we used 12 highly informative genomic simple sequence repeat (SSR) markers for genotyping seven populations from different areas of Romania. The SSR markers were highly variable, with up to 11 alleles per SSR locus and an average polymorphic information content of 0.713. High values of observed (Ho = 0.542) and expected (He = 0.738) heterozygosities were observed. Cluster analysis of populations did not group them according to geographical distance, but some …

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The Three Creeks Allotment Consolidation: Changing Western Federal Grazing Paradigms, Taylor Payne

Human–Wildlife Interactions

The federal government owns approximately 47% of all land in the western United States. In the state of Utah, about 64% of the land base is managed by the federal Bureau of Land Management (BLM) and the U.S. Forest Service (USFS). The government has historically issued permits to owners of private lands to allow the owners to graze their livestock on public lands. The permits (allotments) are generally of 10-year duration and allow for an annual season of use. In some cases, continued and repeated historical annual grazing practices may not be ideal for permit holders and their communities nor …

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The Infrastructure-Extractives-Resource Governance Complex In The Pan-Amazon: Roll Backs And Contestations, Denise Bebbington, Ricardo Verdum, Cesar Gamboa, Anthony J. Bebbington

Geography

Large-scale access and energy infrastructure projects, together with expanding investments in natural resource extraction, pose significant challenges to biodiversity conservation, forest cover, and the defence of forest peoples' rights and livelihoods across the wider Amazon region. Following a period in which safeguards and forest dwellers' territorial rights were strengthened under more permissive political opportunity structures, the current period has been characterized by efforts to weaken these protections and to facilitate large-scale private investment in previously protected lands. We describe these investment-based threats to forests and rights, and the nature of regulatory rollbacks in the region. We then discuss some of …

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Assessing The Interaction Between Mountain Forests And Snow Avalanches At Nevados De Chillán, Chile And Its Implications For Ecosystem-Based Disaster Risk Reduction, Alejandro Casteller, Thomas Häfelfinger, Erika Cortés Donoso, Karen Podvin, Dominik Kulakowski, Peter Bebi

Geography

Gravitational natural hazards such as snow avalanches, rockfalls, shallow landslides and volcanic activity represent a risk to mountain communities around the world. In particular, where documentary records about these processes are rare, decisions on risk management and land-use planning have to be based on a variety of other sources including vegetation, tree-ring data and natural hazard process models. We used a combination of these methods in order to evaluate dynamics of natural hazards with a focus on snow avalanches at Valle Las Trancas, in the Biobío region in Chile. Along this valley, natural hazards threaten not only the local human …

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Patterns And Drivers Of Recent Disturbances Across The Temperate Forest Biome, Andreas Sommerfeld, Cornelius Senf, Brian Buma, Anthony W. D’Amato, Tiphaine Després, Ignacio Díaz-Hormazábal, Shawn Fraver, Lee E. Frelich, Álvaro G. Gutiérrez, Sarah J. Hart, Brian J. Harvey, Hong S. He, Tomáš Hlásny, Andrés Holz, Thomas Kitzberger, Dominik Kulakowski, David Lindenmayer, Akira S. Mori, Jörg Müller, Juan Paritsis, George L.W. Perry, Scott L. Stephens, Miroslav Svoboda, Monica G. Turner, Thomas T. Veblen, Rupert Seidl

Geography

Increasing evidence indicates that forest disturbances are changing in response to global change, yet local variability in disturbance remains high. We quantified this considerable variability and analyzed whether recent disturbance episodes around the globe were consistently driven by climate, and if human influence modulates patterns of forest disturbance. We combined remote sensing data on recent (2001–2014) disturbances with in-depth local information for 50 protected landscapes and their surroundings across the temperate biome. Disturbance patterns are highly variable, and shaped by variation in disturbance agents and traits of prevailing tree species. However, high disturbance activity is consistently linked to warmer and …

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Conflicts Over Extractivist Policy And The Forest Frontier In Central America, Anthony J. Bebbington, Laura Aileen Sauls, Herman Rosa, Benjamin Fash, Denise Bebbington

Geography

Central America is characterized by an asymmetric forest transition in which net deforestation is a product of both forest loss and patches of forest resurgence. Forest loss is also associated with rights violations. We explore the extent to which extractive industry and infrastructure investments create pressure on forest resources, community rights and livelihoods. Drivers of this investment are identified, in particular: constitutional, legislative and regulatory reforms; energy policies; new financial flows; and ideas of development emphasizing the centrality of infrastructure in combining geographical integration and economic growth. We discuss forms of contentious action that have emerged in response to these …

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Plant Discrimination By Support Vector Machine Classifier Based On Spectral Reflectance, Saman Akbarzadeh, Arie J. Paap, Selam T. Ahderom, Beniamin Apopei, Kamal Alameh

Research outputs 2014 to 2021

Support Vector Machine (SVM) algorithms are developed for weed-crop discrimination and their accuracies are compared with a conventional data-aggregation method based on the evaluation of discrete Normalised Difference Vegetation Indices (NDVIs) at two different wavelengths. A testbed is especially built to collect the spectral reflectance properties of corn (as a crop) and silver beet (as a weed) at 635 nm, 685 nm, and 785 nm, at a speed of 7.2 km/h. Results show that the use of the Gaussian-kernel SVM method, in conjunction with either raw reflected intensities or NDVI values as inputs, provides better discrimination accuracy than that attained …

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Smallholder Farmers, Environmental Change And Adaptation In A Human-Dominated Landscape In The Northern Highlands Of Rwanda, Apollinaire William

Antioch University Dissertations & Theses

Climate change and crop intensification are key challenges to the livelihoods and wellbeing of the majority of rural smallholder farmers in developing countries, particularly in human-dominated, climate-sensitive landscapes such as the northern highlands of Rwanda where issues of fluvial floods, soil erosion pose serious threats to the livelihoods of smallholder farmers. In this mixed methods study conducted between August and December 2015, I explored smallholder farmers’ perceptions by examining what barriers might hinder the process of agroforestry adoption by smallholder farmers, what socio-economic and physical factors and attitudes influence crop choices, motivations for smallholder farmers’ willingness to plant trees within …

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Full-Text Articles in Forest Sciences

Chemical Analysis Data, Charlotte A. Shade, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Data Files

Aquatic Fine Woody Debris, Erin C. Rowekamp, Julia I. Chapman, Ryan W. Mcewan

Data Files

Prototype Data, Margaret E. Maloney, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Data Files

Lonicera Maackii Leaf Feeding Tests: Initial Mass, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Data Files

Lonicera Maackii Leaf Feeding Tests: Physicochemical Data, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Data Files

Lonicera Maackii Flower Leachate Toxicity: Survival And Mass, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Data Files

Leaf Litter Basket, Erin C. Rowekamp, Taylor M. Buskey, Julia I. Chapman, Ryan W. Mcewan

Data Files

Seedling, Erin C. Rowekamp, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Data Files

Characteristics Of Activated Carbons Produced From Herbaceous Biomass Feedstock, Oluwatosin Jerry Oginni

Graduate Theses, Dissertations, and Problem Reports (ETD)

Aquatic Coarse Woody Debris, Erin C. Rowekamp, Julia I. Chapman, Ryan W. Mcewan

Data Files

Biofilm Ash Free Dry Mass And Chlorophyll A, Kevin W. Custer, Sean D. Mahoney, Mitchell J. Kukla, Corey Kuminecz, Joseph Murphy, Julia I. Chapman, Ryan W. Mcewan

Data Files

Drivers Of Post-Fire Vascular Plant Regeneration In The Conifer-Dominated Boreal Forest Of Southern Northwest Territories, Alison White

Theses and Dissertations (Comprehensive)

A Comparison Of Two Methods Of Quantifying Mating Success In Low Density Gypsy Moth (Lymantria Dispar) Populations, Alexandra Barry, Hannah Byrne, Derek M. Johnson

Undergraduate Research Posters

Investigating The Ecology Of A Rare Species On St. John, Usvi: Reintroducing Solanum Conocarpum In Light Of Climate Change, Cecilia Rogers

Senior Honors Projects, 2010-2019

Competition Issues In The Chicken Meat, Chicken Egg, And Pork Markets Of The Philippines, Cenon D. Elca, Prudenciano U. Gordoncillo, Charis Mae T. Neric, Janine P. Curibot

Journal of Public Affairs and Development

Overcoming Challenges In Earthquake Preparedness In Panay Island In The Philippines Through Good Governance, Ramil B. Atando

Journal of Public Affairs and Development

Organizational Identification Of Personnel During A Major Restructuring: The Case Of The Agricultural Training Institute, Andrew D. Gasmen, Rowena Dt. Baconguis, Maria Ana T. Quimbo

Journal of Public Affairs and Development

Knowledge And Practices On Family Development Of 4ps Beneficiaries In Camarines Sur, Philippines, Stanley O. Dy

Journal of Public Affairs and Development

The Role Of Environmental Filtering In Structuring Appalachian Tree Communities: Topographic Influences On Functional Diversity Are Mediated Through Soil Characteristics, Julia I. Chapman, Ryan W. Mcewan

Biology Faculty Publications

Persistence Of Stream Restoration With Large Wood, Redwood National And State Parks, California, Diedra L. Rodriguez

Cal Poly Humboldt theses and projects

Within-Fire Patchiness Associated With Prescribed Burning In The Northern Jarrah Forests Of Western Australia, Zigourney Nielsen

Theses: Doctorates and Masters

Natural And Anthropogenic Drivers Of Tree Evolutionary Dynamics, Brandon M. Lind

Theses and Dissertations

Turkish Journal of Agriculture and Forestry

The Three Creeks Allotment Consolidation: Changing Western Federal Grazing Paradigms, Taylor Payne

Human–Wildlife Interactions

The Infrastructure-Extractives-Resource Governance Complex In The Pan-Amazon: Roll Backs And Contestations, Denise Bebbington, Ricardo Verdum, Cesar Gamboa, Anthony J. Bebbington

Geography

Assessing The Interaction Between Mountain Forests And Snow Avalanches At Nevados De Chillán, Chile And Its Implications For Ecosystem-Based Disaster Risk Reduction, Alejandro Casteller, Thomas Häfelfinger, Erika Cortés Donoso, Karen Podvin, Dominik Kulakowski, Peter Bebi

Geography

Geography

Conflicts Over Extractivist Policy And The Forest Frontier In Central America, Anthony J. Bebbington, Laura Aileen Sauls, Herman Rosa, Benjamin Fash, Denise Bebbington

Geography

Plant Discrimination By Support Vector Machine Classifier Based On Spectral Reflectance, Saman Akbarzadeh, Arie J. Paap, Selam T. Ahderom, Beniamin Apopei, Kamal Alameh

Research outputs 2014 to 2021

Smallholder Farmers, Environmental Change And Adaptation In A Human-Dominated Landscape In The Northern Highlands Of Rwanda, Apollinaire William

Antioch University Dissertations & Theses