Defining The Physiochemical, Biological And Habitat Requirements For The Upper Extant Of Oncorhynchus Mykiss Distribution,
2014
Bemidji State University
Defining The Physiochemical, Biological And Habitat Requirements For The Upper Extant Of Oncorhynchus Mykiss Distribution, Emily Powers
Journal of Earth and Life Science
The distribution of rainbow trout is strongly influenced by their habitat. As climatic conditions change, the distribution of rainbow trout populations will change along with them. The objective of this study was to identify the particular habitat parameters that rainbow trout select for in this lotic system and to specifically assess how this relates to the upper extant of their distribution. By assessing the distribution of the upper extant specifically, future research may be conducted to better assess climatic changes on a small and/or large scale basis. A 9,000 m section of the Clearwater River was used as the study …
The Effects Of Angling Pressure On Northern Pike Size Structure,
2014
Bemidji State University
The Effects Of Angling Pressure On Northern Pike Size Structure, Ryan Carrow
Journal of Earth and Life Science
A number of conditions within a lake system can affect northern pike (Esox lucius) size structure. Of these conditions, the amount of angling pressure may have the biggest effect on the size structure of northern pike in Minnesota lake systems. In this study, five private and five public lakes were chosen near Bemidji, Minnesota. Each lake was fished for twenty angling hours using live northern hog suckers (Hypentelium nigricans) or golden shiners (Notemigonus crysoleucas). Total length (mm) and weight (kg) were measured for each northern pike caught. The number of fish houses that were …
Zinc Sulfide: Manganese Doped Quantum Rods For Detection Of Metal Ions And A Business Model For Future Sales,
2014
University of Central Florida
Zinc Sulfide: Manganese Doped Quantum Rods For Detection Of Metal Ions And A Business Model For Future Sales, Andrew Teblum
Electronic Theses and Dissertations
Hexavalent chromium is an extremely carcinogenic chemical that has been widely produced in the United States. This has led to major waste contamination and pollution throughout the country. According to the Environmental Working Group Hexavalent chromium has been found in 89% of city tap water. Most people believe they are safe using regular home filter systems however that is not true. A more expensive ion exchange water treatment unit is required. Therefore to protect yourselves from this carcinogenic metal a reliable test is required. In this study we have developed a Zinc Sulfide Manganese doped Quantum Rod technology to detect …
Investigating Stormwater Drainage Basin Sediments As A Means Of Bacterial Accumulation And Transport Within A South Carolina Estaurine Watershed,
2014
Coastal Carolina University
Investigating Stormwater Drainage Basin Sediments As A Means Of Bacterial Accumulation And Transport Within A South Carolina Estaurine Watershed, Matthew Kyle Curtis
Electronic Theses and Dissertations
While the presence of fecal indicator bacteria such as Escherichia coli in urban stormwater has been widely documented, their occurrence and persistence in sediments are not as well understood. Traditional research into bacterial contamination of surface waters has focused on overland transport of waste material and assumes fecal bacteria such as E. coli have short lifetimes in the environment. Recent investigations suggest that E. coli can accumulate in drainage basin sediments and act as a fecal bacterial reservoir within a watershed. This thesis investigated the prevalence of E. coli populations in the sediments and overlying waters of Withers Swash (a …
A Review Of The Hyporheic Zone, Stream Restoration, And Means To Enhance Denitrification,
2014
SUNY Stony Brook
A Review Of The Hyporheic Zone, Stream Restoration, And Means To Enhance Denitrification, Leanne Merill, David J. Tonjes
Technology & Society Faculty Publications
The hyporheic zone is the subsurface area below and adjacent to a stream where groundwater mixes with stream water, through vertical, lateral, and longitudinal flows. The hyporheic zone connects the stream to uplands and other terrestrial environments. It is a zone of distinct faunal communities, high biological diversity and ecological complexity, and is the site of chemical processing and transformations of ground- and stream waters. The hyporheic zone is important to the overall ecosystem ecology of the stream, and it can influence stream water chemistry. Flows, reactions, and biota in the hyporheic zone are heterogeneous and patchy, making it difficult …
Kentucky Nutrient Model Calibration Tutorial,
2014
University of Kentucky
Kentucky Nutrient Model Calibration Tutorial, Kentucky Water Resources Research Institute
KWRRI Research Reports
This tutorial has been developed to illustrate how to calibrate the KYNM using two different example watersheds: 1) the Upper Chenoweth Run watershed and 2) the Middle Chenoweth Run watershed. Both models are provided with the KYNM Users Manual. The Upper Chenoweth Run does not contain any significant point sources, while the Middle Chenoweth Run watershed contains several point sources. Calibrating a model of a dynamic system is often not a simple linear process but an iterative one. The following discussion outlines “steps” in calibrating a model, but it must be understood that the phenomena being modeled are interconnected and …
Community Visions For Nutrient Management For The Floyds Fork Watershed,
2014
University of Kentucky
Community Visions For Nutrient Management For The Floyds Fork Watershed, Kentucky Water Resources Research Institute
KWRRI Research Reports
This report presents the results of a stakeholder engagement process for the Floyds Fork Watershed in north central Kentucky. The report is meant to inform the local citizens of the watershed, as well as US EPA and the Kentucky Division of Water as part of ongoing watershed management activities within the watershed. The process implemented in this study are intended to provide insights into a range of perspectives and community preferences related to possible nutrient management strategies for use in the Floyds Fork Watershed.
The Kentucky Nutrient Model (Kynm),
2014
University of Kentucky
The Kentucky Nutrient Model (Kynm), Kentucky Water Resources Research Institute
KWRRI Research Reports
The Kentucky Nutrient Model (KYNM) was developed in 2014 to provide the Kentucky Division of Water (KYDOW) with a simplified tool for use in developing nutrient based TMDLs and in evaluating different nutrient management strategies. This report provides a brief overview of the KYNM along with a discussion of the validation of the model against observed hydrology and water quality data, and a comparison of the model results against the results obtained by the LSPC model developed by Tetra Tech for the Floyds Fork Watershed.
A Summary Of The Kentucky River Watershed Watch 2014 Water Sampling Results,
2014
University of Kentucky
A Summary Of The Kentucky River Watershed Watch 2014 Water Sampling Results, Kentucky Water Resources Research Institute
Kentucky River Watershed Watch
No abstract provided.
A Discussion Of The Impact Of Political And Economic Forces On Equitable Access To Potable Water In Ecuador And Recommendations For Improvement Through Better Watershed Management,
2014
Pitzer College
A Discussion Of The Impact Of Political And Economic Forces On Equitable Access To Potable Water In Ecuador And Recommendations For Improvement Through Better Watershed Management, Eliza States
Pitzer Senior Theses
This thesis will address the impact of political and economic forces on the equitable access to fresh water in Ecuador. Demographic factors such as the rural-to-urban migration and the political and economic forces have strongly influenced the debate over the privatization of the provision of potable water and sanitation services. Within the context of Ecuador, two different approaches by the largest cities, Quito and Guayaquil, are analyzed; in Guayaquil, the services were privatized, while in Quito, the public utility was corporatized, remaining under public control. It concludes arguing that in the face of political instability and a lack of regulatory …
The Effect Of Azo Textile Dyes On Gross Primary Production And Community Respiration In An Artificial Environment,
2014
Colby College
The Effect Of Azo Textile Dyes On Gross Primary Production And Community Respiration In An Artificial Environment, Theresa L. Petzoldt
Honors Theses
Azo dyes are the largest category of textile dyes in production today, with over 100,000 tons of dye produced yearly in the United States. Ten to fifty percent of this dye is not fixed to the fabric during the textile production process, and is therefore discarded as effluent. Because dye waste is difficult to process in wastewater treatment facilities, it is important to understand how this waste affects aquatic systems using a whole ecosystem approach. This study used an artificial stream to model the effects of four azo dyes on benthic biofilm production and respiration. Dyes were found to have …
The Impact Of Dams On Nitrogen Cycling In The Messalonskee Stream,
2014
Colby College
The Impact Of Dams On Nitrogen Cycling In The Messalonskee Stream, Rebecca K. Forgrave
Honors Theses
The Messalonskee Stream in central Maine has five hydroelectric dams on 16.6km. Each dam drastically changes the flow regime of the stream, dividing it into segments with different patterns of sediment settling and organic matter retention. I investigated how these disruptions impact nitrogen cycling, specifically nitrification rates above and below each dam. I expected higher nitrification rates above the dams, where levels of organic matter are higher, and lower rates below the dam where scouring removes organic matter and fine sediment from the streambed. I measured sediment nitrification rates with a nitrapyrin-inhibition assay and potential drivers of nitrification including sediment …
Water Recovery From Silica Saturated Ro Concentrate By The Concentrate Enhanced Reverse Osmosis Process,
2014
University of Texas at El Paso
Water Recovery From Silica Saturated Ro Concentrate By The Concentrate Enhanced Reverse Osmosis Process, Gautam Patwardhan
Open Access Theses & Dissertations
Membrane fouling due to silica precipitation during reverse osmosis (RO) continues to be documented as the most common challenge in attaining stable continuous operation of RO systems across water treatment plants (1). Silica scale precipitation is time dependent and involves multiple steps leading to aqueous polymerization, condensation of polymers to form colloids, and deposition onto a solid surface (2). Exceeding the solubility of silica, widely considered to be in the range of 100-140 ppm, under a pH of 8 at 25 °C by various researchers, results in the precipitation of silica on the membranes, thereby limiting water recovery. Once the …
Hydropower,
2014
University of Richmond
Hydropower, Mary Finley-Brook
Geography and the Environment Faculty Publications
Hydropower dates back to the use of waterwheels to grind grain in Greece over two thousand years ago. Modern hydropower is a mature industry that has been used to generate electricity since the 1880s by capturing flowing water with a dam or other diversion structure and channeling it through a waterwheel or turbine. According to a 2012 report by the International Energy Agency, internationally dams are responsible for the largest amount of power generation from a renewable source; yet they have come under scrutiny as a result of environmental and social impacts perceived to be unsustainable (McCully 2001). Specific impacts, …
Assessing Resilience In Stressed Watersheds,
2014
University of Nebraska-Lincoln
Assessing Resilience In Stressed Watersheds, Kristine T. Nemec, Joana Chan, Christina Hoffman, Trisha L. Spanbauer, Joseph A. Hamm, Craig R. Allen, Trevor Hefley, Donald Pan, Prabhakar Shrestha
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Although several frameworks for assessing the resilience of social-ecological systems (SESs) have been developed, some practitioners may not have sufficient time and information to conduct extensive resilience assessments. We have presented a simplified approach to resilience assessment that reviews the scientific, historical, and social literature to rate the resilience of an SES with respect to nine resilience properties: ecological variability, diversity, modularity, acknowledgement of slow variables, tight feedbacks, social capital, innovation, overlap in governance, and ecosystem services. We evaluated the effects of two large-scale projects, the construction of a major dam and the implementation of an ecosystem recovery program, on …
Refining Aquatic Macroinvertebrate Community Metrics For The Assessment Of Headwater Streams In New York State,
2014
University at Albany, State University of New York
Refining Aquatic Macroinvertebrate Community Metrics For The Assessment Of Headwater Streams In New York State, Brian T. Duffy
Legacy Theses & Dissertations (2009 - 2024)
The River Continuum Concept describes the structural and functional shift that occurs from sensitive headwater streams to the lowest reaches of large, non-wadeable rivers. New York State (NYS) maintains a long-established biological monitoring program using macroinvertebrate community assemblages for water quality assessment. However, headwater streams are rarely assessed, and no reference models are available, except those calibrated for lower-continuum wadeable streams and rivers. Current patterns of rural landuse change emphasize the need for more accurate assessment of previously neglected headwaters, in order to set natural reference standards for more accurate assessments of water quality. Ecoregion, drainage area (DA), elevation (elev.), …
Self-Imposed Length Limits In Recreational Fisheries,
2014
USGS Nebraska Cooperative Fish and Wildlife Research Unit
Self-Imposed Length Limits In Recreational Fisheries, Christopher J. Chizinski, Dustin R. Martin, Keith L. Hurley, Kevin L. Pope
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
A primary motivating factor on the decision to harvest a fish among consumptive-orientated anglers is the size of the fish. There is likely a cost-benefit trade-off for harvest of individual fish that is size and species dependent, which should produce a logistic-type response of fish fate (release or harvest)as a function of fish size and species. We define the self-imposed length limit as the length at which a captured fish had a 50% probability of being harvested, which was selected because it marks the length of the fish where the probability of harvest becomes greater than the probability of release. …
Panarchy: Theory And Application,
2014
University of Nebraska-Lincoln
Panarchy: Theory And Application, Craig R. Allen, David G. Angeler, Ahjond S. Garmestani, Lance H. Gunderson, C. S. Holling
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
The concept of panarchy provides a framework that characterizes complex systems of people and nature as dynamically organized and structured within and across scales of space and time. It has been more than a decade since the introduction of panarchy. Over this period, its invocation in peer-reviewed literature has been steadily increasing, but its use remains primarily descriptive and abstract. Here, we discuss the use of the concept in the literature to date, highlight where the concept may be useful, and discuss limitations to the broader applicability of panarchy theory for research in the ecological and social sciences. Finally, we …
Discontinuities, Cross-Scale Patterns, And The Organization
Of Ecosystems,
2014
James Cook University
Discontinuities, Cross-Scale Patterns, And The Organization Of Ecosystems, Kirsty L. Nash, Craig R. Allen, David G. Angeler, Chris Barichievy, Tarsha Eason, Ahjond S. Garmestani, Nicholas A. J. Graham, Dean Granholm, Melinda Knutson, R. John Nelson, Magnus Nyström, Craig A. Stow, Shana M. Sundstrom
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Ecological structures and processes occur at specific spatiotemporal scales, and interactions that occur across multiple scales mediate scale-specific (e.g., individual, community, local, or regional) responses to disturbance. Despite the importance of scale, explicitly incorporating a multi-scale perspective into research and management actions remains a challenge. The discontinuity hypothesis provides a fertile avenue for addressing this problem by linking measureable proxies to inherent scales of structure within ecosystems. Here we outline the conceptual framework underlying discontinuities and review the evidence supporting the discontinuity hypothesis in ecological systems. Next we explore the utility of this approach for understanding cross-scale patterns and the …
Predicted Avian Responses To Bioenergy Development
Scenarios In An Intensive Agricultural Landscape,
2014
University of Nebraska-Lincoln
Predicted Avian Responses To Bioenergy Development Scenarios In An Intensive Agricultural Landscape, Daniel R. Uden, Craig R. Allen, Rob B. Mitchell, Tim D. Mccoy, Qingfeng Guan
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Conversion of native prairie to agriculture has increased food and bioenergy production but decreased wildlife habitat. However, enrollment of highly erodible cropland in conservation programs has compensated for some grassland loss. In the future, climate change and production of second-generation perennial biofuel crops could further transform agricultural landscapes and increase or decrease grassland area. Switchgrass (Panicum virgatum) is an alternative biofuel feedstock that may be economically and environmentally superior to maize (Zea mays) grain for ethanol production on marginally productive lands. Switchgrass could benefit farmers economically and increase grassland area, but there is uncertainty as to how conversions between rowcrops, …
