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Occupancy And Habitat Use By Six Species Of Forest Ungulates On Tiwai Island, Sierra Leone, Kathryn R. McCollum, Emily Belinfonte, April L. Conway, John Carroll 2018 University of Nebraska-Lincoln

Occupancy And Habitat Use By Six Species Of Forest Ungulates On Tiwai Island, Sierra Leone, Kathryn R. Mccollum, Emily Belinfonte, April L. Conway, John Carroll

Papers in Natural Resources

Forest ungulates in West Africa are common bushmeat species and are subject to habitat degradation through deforestation. Based on historical data, there are possibly 12 species of forest Bovidae and Tragulidae found in eastern Sierra Leone. We used camera trapping to assess occupancy by forest ungulates on and around a small protected area, Tiwai Island, Sierra Leone. We then assessed habitat over two field seasons during 2008–2011 for those species where we had sufficient numbers of detections. We detected 6 of 12 potential species and obtained enough data to further assess the habitat of two species. Species detected included ...


Preventing Extinction Of At-Risk Plant Species In A Complex World, Holly Lee Bernardo 2018 Washington University in St. Louis

Preventing Extinction Of At-Risk Plant Species In A Complex World, Holly Lee Bernardo

Arts & Sciences Electronic Theses and Dissertations

Earthճ current biodiversity crisis is now considered a true mass extinction event, with species level extinction rates well above background rates and population level extinction rates orders of magnitude more common that species extinctions. There are many threats driving this loss of biodiversity. How each threat impacts the viability of a species is highly context dependent, but all are anthropogenic in origin and so as the human population continues to increase, so too will the pressure of these threats on our natural systems. Ultimately, how much a threat decreases the viability of a species depends on how that threat influences ...


A Comparison Of Vnir And Mir Spectroscopy For Predicting Various Soil Properties, Joshua R. Gates 2018 University of Nebraska-Lincoln

A Comparison Of Vnir And Mir Spectroscopy For Predicting Various Soil Properties, Joshua R. Gates

Dissertations & Theses in Natural Resources

Soil plays an important role in our daily lives, namely producing food, cleaning water and storing carbon. The ability to rapidly and cost-effectively quantify the various components of soils can help us understand and better manage this important resource. This study aims to compare the ability of visible near-infrared (VNIR) spectroscopy and mid-infrared (MIR) spectroscopy to quickly and accurately predict various important soil properties (electrical conductivity, soil pH, cation exchange capacity, exchangeable cations, phosphorus, carbon, beta-glucosidase enzyme activity and nitrogen). Prediction models were developed using partial least squares regression (PLSR) techniques. Three different calibration sampling methods were tested along with ...


Boundary Spanners And Trust Development Between Stakeholders In Integrated Water Resource Management: A Mixed Methods Study, Jodi L. Delozier 2018 University of Nebraska-Lincoln

Boundary Spanners And Trust Development Between Stakeholders In Integrated Water Resource Management: A Mixed Methods Study, Jodi L. Delozier

Dissertations & Theses in Natural Resources

Natural resource issues are inherently complex, even more so are those that involve the management of water. Because watersheds tend to cross multiple jurisdictional and geographical boundaries, a diverse set of stakeholders are needed to develop appropriate and sustainable management policy. This research sheds light on the importance of boundary spanners assisting in the development of trust between stakeholders in integrated water resource management (IWRM). Previous literature has explored the advantages to boundary spanning leadership in business practice, emergency management, university and community management as well as fish and wildlife management, but has failed to address the area of integrated ...


Perils Of The Fungal Kingdom: Mycotoxins In Food And Feed, Adrianna Isobel Pribil 2018 Louisiana State University

Perils Of The Fungal Kingdom: Mycotoxins In Food And Feed, Adrianna Isobel Pribil

LSU Master's Theses

Humans and fungi have a complex relationship, especially in regards to the many fungal secondary metabolites that can be produced. When secondary metabolites are toxic to animals and humans they are defined as mycotoxins. Fungi can grow on crops pre-harvest and post-harvest, and have the potential to produce mycotoxins which occur regularly in animal feed and food for human consumption. In high doses, mycotoxins cause variety of problems that result in economic losses and extreme health issues. However, multiple mycotoxins will co-occur in nature and commonly occur in low doses. Thus chronic low daily doses of multiple mycotoxins overtime may ...


Exploring The Amphibian Exposome In An Agricultural Landscape Using Telemetry And Passive Sampling, Jennifer E. Swanson, Erin Muths, Clay L. Pierce, Stephen J. Dinsmore, Mark W. Vandever, Michelle L. Hladik, Kelly L. Smalling 2018 Iowa State University

Exploring The Amphibian Exposome In An Agricultural Landscape Using Telemetry And Passive Sampling, Jennifer E. Swanson, Erin Muths, Clay L. Pierce, Stephen J. Dinsmore, Mark W. Vandever, Michelle L. Hladik, Kelly L. Smalling

Natural Resource Ecology and Management Publications

This is the first field study of its kind to combine radio telemetry, passive samplers, and pesticide accumulation in tissues to characterize the amphibian exposome as it relates to pesticides. Understanding how habitat drives exposure in individuals (i.e., their exposome), and how that relates to individual health is critical to managing species in an agricultural landscape where pesticide exposure is likely. We followed 72 northern leopard frogs (Lithobates pipiens) in two agricultural wetlands for insight into where and when individuals are at high risk of pesticide exposure. Novel passive sampling devices (PSDs) were deployed at sites where telemetered frogs ...


Improving The Calibration Of Silicon Photodiode Pyranometers, Elizabeth Walter-Shea, Kenneth Hubbard, Mark A. Mesarch, Glen Roebke 2018 University of Nebraska-Lincoln

Improving The Calibration Of Silicon Photodiode Pyranometers, Elizabeth Walter-Shea, Kenneth Hubbard, Mark A. Mesarch, Glen Roebke

Papers in Natural Resources

Reliable measurements of global irradiance are essential for research and practical applications. Silicon photodiode pyranometers (SiPs) offer low-cost sensors to measure direct and diffuse irradiance despite their non-uniform spectral response over the 300–1000 nm spectral range. In this study, non-adjusted linear and adjusted calibrations were applied at different times of the year to determine sources of estimated errors in global irradiance due to the two calibration approaches, calibration time, and sensor age. 16 SiPs, along with two standards, measured incident global irradiance over a 5-year period under a range of sky conditions. Sensors performed best in the months in ...


Analysis Of Gravity Recovery And Climate Experiment (Grace) Satellite-Derived Data As A Groundwater And Drought Monitoring Tool, Anthony James Mucia 2018 University of Nebraska-Lincoln

Analysis Of Gravity Recovery And Climate Experiment (Grace) Satellite-Derived Data As A Groundwater And Drought Monitoring Tool, Anthony James Mucia

Dissertations & Theses in Natural Resources

This research compares Gravity Recovery and Climate Experiment (GRACE) groundwater storage (GWS) and root zone soil moisture (RZSM) percentiles to measured data, other drought indicators (DIs) and indices, and stakeholder observations for the purpose of assessing the feasibility and usefulness of these products to detect drought conditions. GRACE percentiles were directly compared to historic groundwater percentiles at 89 Nebraska well locations. Spatial time-series correlations over CONUS were performed between GRACE GWS and RZSM and the U.S. Drought Monitor (USDM), Standardized Precipitation Index (SPI), and soil moisture parameters from several North American Land Data Assimilation System (NLDAS) models. A survey ...


Recognition Of Regional Water Table Patterns For Estimating Recharge Rates In Shallow Aquifers, Troy E. Gilmore, Vitaly A. Zlotnik, Mason Johnson 2018 University of Nebraska - Lincoln

Recognition Of Regional Water Table Patterns For Estimating Recharge Rates In Shallow Aquifers, Troy E. Gilmore, Vitaly A. Zlotnik, Mason Johnson

Papers in Natural Resources

We propose a new method for groundwater recharge rate estimation in regions with stream-aquifer interactions, at a linear scale on the order of 10 km and more. The method is based on visual identification and quantification of classically recognized water table contour patterns. Simple quantitative analysis of these patterns can be done manually from measurements on a map, or from more complex GIS data extraction and curve fitting. Recharge rate is then estimated from the groundwater table contour parameters, streambed gradients, and aquifer transmissivity using an analytical model for groundwater flow between parallel perennial streams. Recharge estimates were obtained in ...


International Energy Geopolitics, Bert Chapman 2018 Purdue University

International Energy Geopolitics, Bert Chapman

Libraries Faculty and Staff Presentations

Overview of international energy geopolitical trends. Emphasizes the importance of the Persian Gulf, South China Sea, East China Sea, Russia, and the Arctic to U.S. and international economic and strategic developments. Stresses the continuing importance of fossil fuels in domestic and international energy consumption, the variety of energy sources being used by various global regions, the potential for military conflict over access to natural resources, and how emerging energy leaders will determine global energy, environmental, and international security developments.


Shifting Niche Space In Coastal Landscapes: Spatio-Temporal Patterns Driving Submerged Aquatic Vegetation Across The Northern Gulf Of Mexico, Kristin Elise DeMarco 2018 Louisiana State University and Agricultural and Mechanical College

Shifting Niche Space In Coastal Landscapes: Spatio-Temporal Patterns Driving Submerged Aquatic Vegetation Across The Northern Gulf Of Mexico, Kristin Elise Demarco

LSU Doctoral Dissertations

Identifying distributions of submerged aquatic vegetation (SAV) across the northern Gulf of Mexico (NGOM) coastal landscape necessitates describing ecological processes in estuarine gradients. SAV assemblages are ecological indicators of aquatic ecosystem health; spatial and temporal distributions are strongly correlated to environmental conditions. Many wildlife species, including waterfowl, are dependent on SAV and seeds in NGOM coastal marshes for food and habitat. To understand SAV distributions at multiple spatial and temporal scales a multi-tiered project was designed to collect SAV presence, species assemblage, and cover data, and cores to describe seed food. The first tier sampled inter-annually in the growing seasons ...


Desalination Concentrate Disposal: Ecological Effects And Sustainable Solutions, Ryan Hanley 2018 University of Washington – Tacoma

Desalination Concentrate Disposal: Ecological Effects And Sustainable Solutions, Ryan Hanley

Global Honors Theses

Freshwater availability is a growing global concern, and desalination is often presented as the solution, but from this important technology comes issues of toxic waste. Ecosystems are delicate areas that contain species adapted to that specific location, and any chemical or physical changes can disrupt the fitness of species. The concentrate byproduct waste from desalination plants is toxic to species if the concentrate is not compatible with the receiving water body. A critical review of scientific articles, industry-leading books, conversations with industry experts, and information from the American Membrane Technology Association conference was used to analyze the current knowledge. Species ...


Making And Breaking Trust In Forest Collaborative Groups, Emily Jane Davis, Lee K. Cerveny, Donald R. Ulrich, Meagan L. Nuss 2018 Oregon State University

Making And Breaking Trust In Forest Collaborative Groups, Emily Jane Davis, Lee K. Cerveny, Donald R. Ulrich, Meagan L. Nuss

Humboldt Journal of Social Relations

There has been a recent increase in use of an organized, forest ‘collaborative’ group approach for multi-stakeholder input on federal forestlands in the U.S. West. This approach relies on the creation of shared trust to achieve social agreement. Yet growing critiques suggest a lack of trust in the U.S. Forest Service [Forest Service], between stakeholders, and the collaborative process itself. We conducted three comparative case studies of established forest collaborative groups in Oregon, Washington, and Idaho to ask how trust is created and damaged or broken in this context. We found multiple, interlinked dimensions to trust, including significant ...


Who’S In Charge? The Role Of Power In Collaborative Governance And Forest Management., Patricia B. Orth, Antony S. Cheng 2018 Colorado State University

Who’S In Charge? The Role Of Power In Collaborative Governance And Forest Management., Patricia B. Orth, Antony S. Cheng

Humboldt Journal of Social Relations

Collaborative processes for working toward common management goals between individuals and organizations, despite their differences, emerged as one enduring legacy resulting from the Timber Wars in the American West during the late-1980s and the early 1990s. Power imbalances are often cited as a common problem in collaborative processes and can have a lasting, deleterious impact on the collaborative process and its outcomes. For all its importance, however, there is a yet unfulfilled need to understand the extent to which power and power imbalances affect collaborative relationships. Our research uses a case study approach to qualitatively analyze power dynamics within three ...


The Role Of The Local Community On Federal Lands: The Weaverville Community Forest, Erin C. Kelly 2018 Humboldt State University

The Role Of The Local Community On Federal Lands: The Weaverville Community Forest, Erin C. Kelly

Humboldt Journal of Social Relations

In the wake of the timber wars, communities across the American West have struggled to redefine their relationships to nearby federal forests. The timber-dependent model of the pre-Timber War era, with clear timber targets and economic outputs, has been replaced by more nuanced and less clearly-defined model: ecosystem management. This case study research uses interviews with participants in the Weaverville Community Forest (WCF) to explore the role of a community in managing its nearby federal lands. Momentum for the WCF flowed from a small group of citizens who were invested in the forest despite their cultural and ideological differences regarding ...


An Opportunity To End The Timber Wars: How Collaboration In Southeast Alaska Has Helped To Dissipate Conflict, Diana K. Portner 2018 Meridian Institute

An Opportunity To End The Timber Wars: How Collaboration In Southeast Alaska Has Helped To Dissipate Conflict, Diana K. Portner

Humboldt Journal of Social Relations

Forest management in the Tongass National Forest has been a topic of controversy for decades, due to the result of intense timber extraction in the mid-twentieth century. In recent years, collaborative approaches to management, beginning with a federally chartered advisory committee, have offered opportunities to overcome the seemingly intractable conflict. While a new culture of collaboration is emerging in Southeast Alaska, the region still faces challenges associated with the implementation of these approaches. This commentary explores the history of the conflict, factors that contributed to the success of collaborative approaches to land management in the region, and continued challenges that ...


There Is A Fish In My Forest And Other Post-Timber War Musings, Mike Miles 2018 Humboldt Redwood Company

There Is A Fish In My Forest And Other Post-Timber War Musings, Mike Miles

Humboldt Journal of Social Relations

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Finding Solutions Through Politics: One View From Inside The Timber Wars, Erin C. Kelly, Andrea Tuttle 2018 Humboldt State University

Finding Solutions Through Politics: One View From Inside The Timber Wars, Erin C. Kelly, Andrea Tuttle

Humboldt Journal of Social Relations

There are many perspectives of the timber wars, and one perspective that is not frequently documented is that of government bureaucrats – policy makers, regulators, and others who were often caught in the crossfire of opposing sides. This oral history with Dr. Andrea Tuttle is one attempt to describe the Timber Wars from this perspective. On February 25, 2017, I invited Dr. Tuttle to sit down and discuss her history with forest regulation. I asked very few questions and instead listened as she told the history; I ended up with two hours of audio, which I transcribed to over fifteen pages ...


Timber Wars And Aftermath In Northwest Coastal California, Richard Gienger 2018 various watershed'forestry NGOs

Timber Wars And Aftermath In Northwest Coastal California, Richard Gienger

Humboldt Journal of Social Relations

Abstract and other info uploaded below


There Has Never Been A 'Timber War', Greg King 2018 Siskiyou Land Conservancy

There Has Never Been A 'Timber War', Greg King

Humboldt Journal of Social Relations

There has never been a 'timber war' in northwestern California, but rather premeditated and ongoing attacks against the forests, and against the people who would protect them. This paper provides a historic examination of redwood logging and protection efforts since 1850.


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