Digital Commons Network^™

The Role Of Fine-Scale Habitat Associations In Structuring Spider Assemblages: Determinants Of Spatial Patterns In Community Compostion, Stephanie M. Cobbold

Green Canyon Environmental Research Area, Logan Utah

No abstract provided.

Livestock Foraging Behavior In Response To Sequence And Interactions Among Alkaloids, Tannins, And Saponins, Tiffany L. Jensen

Green Canyon Environmental Research Area, Logan Utah

No abstract provided.

The Role Of Modern Zoos In Wildlife Conservation: From The Wcs To The Wild, John Scott

Student Theses 2001-2013

The reality of the modern world is that humanity is increasing its population rapidly, and demanding more resources than the earth can provide. Humans are utilizing resources like water and fossil fuels, and are in turn polluting and causing a shift in the global climate. Most importantly, humans are taking previously untouched land and utilizing it for living space or agriculture. Therefore there is very little “wild” left after human consumption, and this rapid consumption is adversely affecting all other animal species on this planet. With little food of their own or territory to roam, many species begin their dramatic …

Nutrient Criteria Development Mini-Workshops For Usepa Region Vi States, Brian E. Haggard, J. Thad Scott

Arkansas Water Resources Center Technical Reports

The U.S. Environmental Protection Agency (USEPA) has been encouraging states to accerlate their efforts in developing numeric nutrient criteria to promulgate within respective water quality standards and regulations. Based on USEPA recommendations, many states are pursuing nutrient criteria development by assessing frequency distributions and stressor‐response relationships in historical databases, various special studies and the literature. The mini‐workshops described here were targeted toward state agency personnel and stakeholder groups with an interest in understanding statistical techniques that could be used to aide, guide and support numeric nutrient criteria. An initial workshop was conducted at the USEPA Regional Technical Assistance Group meeting …

Sestonic Chlorophyll-A And Nutrient Relationships Across The Red River Basin, Usa, Brian E. Haggard, J. Thad Scott, Scott D. Longing, John T. Metrailer

Arkansas Water Resources Center Technical Reports

The Red River is a trans‐boundary, multi‐jurisdictional basin, where water‐quality standards often change at the state lines. The state agencies with USEPA Region VI focused resources to organize water‐quality data from within this basin and have it statistically analyzed to evaluate the relationships between nutrients and sestonic chlorophyll‐a (chl‐a). There were 152 sites within the Red River Basin that had nutrient and sestonic chl‐a data, and these sites were narrowed down to 132 when a minimum number of observations was required. Sestonic chl‐a levels increased with increasing nutrient concentrations; these significant regressions were used to predict nutrient concentrations at 10 …

Water Quality Trends Across Select 319 Monitoring Sites In Northwest Arkansas, Bryan W. Bailey, Brian E. Haggard, Leslie B. Massey

Arkansas Water Resources Center Technical Reports

Northwest Arkansas contains two 319 priority watersheds that the Arkansas Natural Resources Commission has identified as being impacted by point source and nonpoint source pollution (i.e., phosphorus, nitrogen, and sediment). This project specifically focused on determining water quality trends at select sites within the Illinois River (HUC# 11110103) and Beaver Reservoir (HUC# 11010001) priority watersheds, including Ballard Creek, Osage Creek, Illinois River, White River, West Fork White River and the Kings River where sufficient constituent data were available. Water quality trends were analyzed using flow‐adjusted constituent concentrations of phosphorus, nitrogen, sediment, sulfate and chloride, and parametric and non‐parametric statistical techniques …

Strategies For Wildlife Disease Surveillance, Jonathan M. Sleeman, Christopher J. Brand, Scott D. Wright

United States Geological Survey: Staff Publications

Epidemiologic surveillance is defined by the Centers for Disease Control and Prevention (CDC) as the "ongoing systematic and continuous collection, analysis, and interpretation of health data': The objective of surveillance is to generate data for rapid response to the detection of a disease of concern to apply prevention, control, or eradication measures as well as to evaluate such interventions. This is distinct from disease monitoring, which usually does not involve a particular response to disease detection.

Surveillance for wildlife diseases has increased in importance due to the emergence and re-emergence of wildlife diseases that are threats to human, animal, and …

Urban Ecosystem Services: Tree Diversity And Stability Of Tropospheric Ozone Removal, Fausto Manes, Guido Incerti, Elisabetta Salvatori, Marcello Vitale, Carlo Ricotta, Robert Costanza

Institute for Sustainable Solutions Publications and Presentations

Urban forests provide important ecosystem services, such as urban air quality improvement by removing pollutants. While robust evidence exists that plant physiology, abundance, and distribution within cities are basic parameters affecting the magnitude and efficiency of air pollution removal, little is known about effects of plant diversity on the stability of this ecosystem service. Here, by means of a spatial analysis integrating system dynamic modeling and geostatistics, we assessed the effects of tree diversity on the removal of tropospheric ozone (O3) in Rome, Italy, in two years (2003 and 2004) that were very different for climatic conditions and ozone levels. …

Working Trees For Water Quality

Working Trees (USDA-NAC)

Working trees for water quality

Working Trees: a partner in watershed management. Agroforestry helps to protect water quality while achieving both landowner and community objectives.

Environmental Education Reform: Using Experiential Learning To Influence Environmental Policy-Making By Fostering A Sense Of Environmental Citizenship And Eco-Literacy, Nicol Belletiere

Student Theses 2001-2013

This paper argues on behalf of environmental education reform in order to improve America’s ailing environmental politics. It does so by emphasizing the overlap between environmental education, the history of education and American conservation, and environmental politics. It first discusses the core differences in varying styles of education in order to provide a context for the terminology and theories used to discuss education reform. More specifically, I compare and contrast the differences in the thought processes each style of education encourages. Divergent thinking, which results from what is known as informal education, is necessary in order to be an ecologically …

The Economics Of Biodiversity, Paige Doyle

Student Theses 2001-2013

Throughout history there has often been a blatant separation between environmental preservation and economic growth, suggesting that the two cannot possibly flourish simultaneously. This idea is not only detrimental to both causes, but prevents their cooperation and coexistence to create a sustainable world. In this paper I will address one of the greatest threats to environmental and economic well-being: the loss of biodiversity. In understanding what biodiversity is and its immeasurable value to society, I hope to exemplify the importance in its preservation. While I will touch on the ecological and ethical reasoning for this, my argument will be mainly …

The Journal’S The Thing: Teaching Natural History And Nature Writing In Baja California Sur, John S. Farnsworth, Christopher Beatty

Environmental Studies and Sciences

The skills of making informed observations, synthesizing those observations, and communicating them effectively are central to the naturalist. Developing university courses that optimize instruction in these skills simultaneously can, however, be a challenge. Here we describe a program at Santa Clara University comprised of two integrated co-requisite courses, Writing Natural History (ENVS 142) and The Natural History of Baja (BIOL/ENVS 144). Lectures through the 10-week winter quarter expand students’ knowledge of the ecosystems and biodiversity of the Baja Peninsula and help them to develop descriptive writing skills. The courses culminate in a ten-day expedition to the Baja Peninsula and Isla …

Working Trees For Water Quality

Working Trees (USDA-NAC)

Water is a precious national resource. Often, human activities degrade the quality of the water in the streams, lakes, estuaries, wetlands, and aquifiers on which we depend. Pollutants from agricultural and urban sources have made many of our waters unsuitable for swimming and fishing. Excessive sedimentation, pesticides, and fertilizers are harming fish and other aquatic life. Changes in land use also have had a dramatic effect on floodwater damage and frequency. Both surface and subsurface drinking water supplies are being impacted by human activities.

Water quality is the end result of the individual actions of all the “neighbors” in a …

Changing The Way We Address Change, Richard Straight

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Covers factors impacting private forest management in the United States, and other related issues.

Assessment Of Windbreak Condition And Indicators To Renovate, Steve Rasmussen

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

A presentation covering assessment of windbreak condition and indicators to renovate.

Mechanisms Of Success: Plant-Herbivore Interactions And The Invasion Of Non-Native Lonicera Species In North America, Deah Lieurance

Browse all Theses and Dissertations

Invasion by non-native species is a complicated process and many hypotheses have been proposed to explain how invasive plant species are often poor competitors in their native range, but dominant in their novel range including the enemy release and novel weapons hypotheses. Additionally, many invasive species are characterized as being tolerant and/or resistant to both damage and limitations in abiotic resources. These hypotheses are based on plant-plant, plant-microbial, and plant-herbivore interactions in the invaders novel range and are not mutually exclusive. The genus Lonicera (Caprifoliaceae) includes approximately 200 species worldwide, with 18 native and 16 introduced species in North America. …

Climate Divisions For Alaska Based On Objective Methods, Peter A. Bieniek, Uma S. Bhatt, Richard L. Thoman, Heather Angeloff, James Partain, John Papineau, Frederick Fritsch, Eric Holloway, John E. Walsh, Christopher Daly, Martha Shulski, Gary Hufford, David F. Hill, Stavros Calos, Rudiger Gens

National Drought Mitigation Center: Faculty Publications

Alaska encompasses several climate types because of its vast size, high-latitude location, proximity to oceans, and complex topography. There is a great need to understand how climate varies regionally for climatic research and forecasting applications. Although climate-type zones have been established for Alaska on the basis of seasonal climatological mean behavior, there has been little attempt to construct climate divisions that identify regions with consistently homogeneous climatic variability. In this study, cluster analysis was applied to monthly-average temperature data from 1977 to 2010 at a robust set of weather stations to develop climate divisions for the state. Mean-adjusted Advanced Very …

The Social Dimensions Of Sustainability And Change In Diversified Farming Systems, Christopher M. Bacon, Christy Getz, Sibella Kraus, Maywa Montenegro, Kaelin Holland

Environmental Studies and Sciences

Agricultural systems are embedded in wider social-ecological processes that must be considered in any complete discussion of sustainable agriculture. Just as climatic profiles will influence the future viability of crops, institutions, i.e., governance agreements, rural household and community norms, local associations, markets, and agricultural ministries, to name but a few, create the conditions that foster sustainable food systems. Because discussions of agricultural sustainability often overlook the full range of social dimensions, we propose a dual focus on a broad set of criteria, i.e., human health, labor, democratic participation, resiliency, biological and cultural diversity, equity, and ethics, to assess social outcomes, …

Modeling Of Growth Kinetics And Characterization Of Membrane Mechanics, Antonio Nava

Electronic Theses and Dissertations

One growing field in alternative energy is biofuel production through microorganisms. These fields of research include hydrogen and biofuel production through the cultivation of algae. We've selected 2 different algae, Anabaena sp. cpcc 387 and Tetraselmis to study. Through mathematical modeling of Anabaena we investigate the complex multicellular relationships and colony stability when noise is introduced. In conjunction with researchers at NREL, we've set out to characterize Tetraselmis cells' membrane elasticity.

The Future Of Agriculture And Society In Iowa: Four Scenarios, Meghann E. Jarchow, G. L. Drake Larsen, Robert Costanza, Gretchen Zdorkowski, Stefans R. Gailans, Nicholaus Ohde, Ranae Dietzel, Sara Kaplan, Jeri Neal, Mae Rose Petrehn, Theodore Gunther, Stephanie N. D’Adamo, Nicholas Mccann, Andrew Larson, Phillip Damery, Lee Gross, Marc Merriman, Ida Kubiszewski, Julian Post, Meghan Sheradin, Matt Liebman

Institute for Sustainable Solutions Publications and Presentations

Iowa is a leader in crop and livestock production, but its high productivity has had concomitant negative environmental and societal impacts and large requirements for fossil-fuel-derived inputs. Maintaining agricultural productivity, economic prosperity and environmental integrity will become ever more challenging as the global demand for agricultural products increases and the resources needed become increasingly limited. Here we present four scenarios for Iowa in 2100, based on combinations of differing goals for the economy and differing energy availability. In scenarios focused on high material throughput, environmental degradation and social unrest will increase. In scenarios with a focus on human and environmental …

Spatial Heterogeneity Across Five Rangelands Managed With Pyric-Herbivory, Devan Allen Mcgranahan, David M. Engle, Samuel D. Fuhlendorf, Stephen L. Winter, James R. Miller, Diane M. Debinski

School of Natural Resources: Faculty Publications

1. Many rangelands evolved under an interactive disturbance regime in which grazers respond to the spatial pattern of fire and create a patchy, heterogeneous landscape. Spatially heterogeneous fire and grazing create heterogeneity in vegetation structure at the landscape level (patch contrast) and increase rangeland biodiversity. We analyzed five experiments comparing spatially heterogeneous fire treatments to spatially homogeneous fire treatments on grazed rangeland along a precipitation gradient in the North American Great Plains.

2. We predicted that, across the precipitation gradient, management for heterogeneity increases both patch contrast and variance in the composition of plant functional groups. Furthermore, we predicted that …

Interannual And Spatial Impacts Of Phenological Transitions, Growing Season Length, And Spring And Autumn Temperatures On Carbon Sequestration: A North America Flux Data Synthesis, Chaoyang Wu, Alemu Gonsamo, Jing Ming Chen, Werner A. Kurz, David T. Price, Peter M. Lafleur, Rachhpal S. Jassal, Danilo Dragoni, Gil Bohrer, Christopher M. Gough, Shashi B. Verma, Andrew E. Suyker, J. William Munger

School of Natural Resources: Faculty Publications

Understanding feedbacks of ecosystem carbon sequestration to climate change is an urgent step in developing future ecosystem models. Using 187 site-years of flux data observed at 24 sites covering three plant functional types (i.e. evergreen forests (EF), deciduous forests (DF) and non-forest ecosystems (NF) (e.g., crop, grassland, wetland)) in North America, we present an analysis of both interannual and spatial relationships between annual net ecosystem production (NEP) and phenological indicators, including the flux-based carbon uptake period (CUP) and its transitions, degree-day-derived growing season length (GSL), and spring and autumn temperatures. Diverse responses were acquired between annul NEP and these indicators …

Kings Canyon To Alger Pass Pipeline Project, Project No. Utu-82322, United States Department Of The Interior, Bureau Of Land Management

Environmental Assessments (UT)

XTO has requested their existing Temporary Use Permit (UTU-82322-01), which authorizes an existing 8 inch, surface, steel, and natural gas pipeline be converted to a permanent right-of-way grant. In addition, XTO proposes to remove a portion of the existing pipeline and to install an additional 15,075 feet of 12 inch, buried, natural gas pipe line to re-direct the flow of gas. XTO has constructed a natural gas compressor plant (Wild Horse Bench Compressor Site) on Ute Tribal land and would like to redirect the flow of gas from the Kings Canyon Area to this facility which involves the removal of …

Nitrogen Partitioning And Transport Through A Subalpine Lake Measured With An Isotope Tracer, Dave M. Epstein, Wayne A. Wurtsbaugh, Michelle A. Baker

Watershed Sciences Faculty Publications

We used a stable isotope tracer to measure nitrogen (N) assimilation and transfer through Bull Trout Lake, a 0.3-km2 mountain lake in Idaho, specifically to explore the relative importance of pelagic and benthic producers. was added into the inflow stream above the lake during spring runoff and the resulting mass of tracer was measured within the various ecosystem compartments, including the outflow stream. Although a portion of the moved through the lake quickly due to a low hydraulic residence time during the addition, the tracer was also assimilated rapidly by seston in the water column and at a slower rate …

‘Looking After Country Two-Ways’: Insights Into Indigenous Community-Based Conservation From The Southern Tanami, Karissa Preuss, Madeline Dixon

Aboriginal Policy Research Consortium International (APRCi)

This paper offers insights and practical lessons for a ‘two-way’ approach to combining Indigenous and non-Indigenous ecological knowledge in environmental planning and management. It is based on the experience of developing an Indigenous Protected Area to conserve 10 million hectares of biologically and culturally significant land in the Southern Tanami region of Central Australia

Pacific Cod (Gadus Macrocephalus) As A Paleothermometer: Otolith Oxygen Isotope Reconstruction, Catherine F. West, Stephen Wischniowski, Christopher Johnston

United States Department of Commerce: Staff Publications

Stable isotope studies are increasingly important for understanding past environmental and cultural developments along the North Pacific Rim. In this paper, we present methods for using Pacific cod (Gadus macrocephalus) otoliths as a paleothermometer using a case study from Kodiak Island, Alaska. The results of this study indicate that Pacific cod otoliths record variable paleoenvironmental conditions during the Little Ice Age. The broad distribution of Pacific cod and success in using the otoliths as a paleothermometer makes this method widely applicable to researchers working throughout the northern Pacific Rim.

Sustainable Design Of Complex Industrial And Energy Systems Under Uncertainty, Zheng Liu

Wayne State University Dissertations

Depletion of natural resources, environmental pressure, economic globalization, etc., demand seriously industrial organizations to ensure that their manufacturing be sustainable. On the other hand, the efforts of pursing sustainability also give raise to potential opportunities for improvements and collaborations among various types of industries.

Owing to inherent complexity and uncertainty, however, sustainability problems of industrial and energy systems are always very difficult to deal with, which has made industrial practice mostly experience based. For existing research efforts on the study of industrial sustainability, although systems approaches have been applied in dealing with the challenge of system complexity, most of them …

Biofuels Production From Hydrotreating Of Vegetable Oil Using Supported Noble Metals, And Transition Metal Carbide And Nitride, Huali Wang

Wayne State University Dissertations

The focus of this research is to prepare non-sulfided hydrotreating catalysts, supported noble metal and transition metal carbide/ nitride, and evaluate their hydrocracking activities and selectivities by using soybean oil as the feedstock. For comparison study, catalytic cracking of soybean oil over a commercialized ZSM-5 was investigated. However, steady state could not be reached because significant amounts of tar and coke were generated during the reaction though a high yield (21%) of jet fuel was obtained from the process. Compared to the catalytic cracking process, less tar and coke were formed during the hydrocracking process and stable continuous flow reaction …

Scwds Briefs: Volume 27, Number 4 (January 2012), Jeanenne Brewton, Michael J. Yabsley

Southeastern Cooperative Wildlife Disease Study: Publications

TB or Not TB: Michigan and Minnesota

Continued Public Support for Hunting

CWD Update: February 2012

Lymphoproliferative Disease in Turkeys

H5N1 HPAI Virus Studies at SCWDS

We Have Lost a Good Friend

Immunomodulation In Eastern Oysters, Crassostrea Virginica, Exposed To A Pah-Contaminated, Microphytobenthic Diatom, April N. Croxton, Gary H. Wikfors, Richard D. Schulterbrandt-Gragg

United States Department of Commerce: Staff Publications

The trophic transfer of sediment-associated pollutants is a growing concern in shellfish harvesting areas. Previous studies have examined the role of phytoplankton in the transport of organic contaminants to bivalve species, but little information on microphytobenthic communities and their role as contaminant vectors exists. Polycyclic aromatic hydrocarbons (PAHs) are organic compounds formed during natural and industrial processes; they are termed “persistent organic pollutants” because they are only slowly degraded by natural processes. This study examined the transfer of PAH compounds (naphthalene, pyrene, and benzo(a)pyrene) by a microphytobenthic diatom to the eastern oyster, a commercially important shellfish species, to determine if …