Watershed Investigative Support To The Poteau Valley Improvement Authority, 2018 University of Arkansas, Fayetteville
Watershed Investigative Support To The Poteau Valley Improvement Authority, Bradley J. Austin, Brina A. Smith, Brian E. Haggard
Nonpoint source pollution associated with human land use (agriculture and urbanization) is one of the leading causes of impairment to waterways in the United States (EPA, 2000). The primary pollutants associated with agricultural and urban land use are sediment and nutrients which enter nearby streams during rain events and are then carried downstream. These sediments and nutrients may result in water quality issues in the downstream water bodies like increased algal growth or decreased water clarity (e.g. Smith et al., 1999).
Design And Evaluation Of 16s Rrna-Targeted Peptide Nucleic Acid Probes For Whole-Cell Detection Of Members Of The Genus Listeria, Byron F. Brehm-Stecher, Jens J. Hyldig-Nielsen, Eric A. Johnson
Byron F. Brehm-Stecher
Six fluorescein-labeled peptide nucleic acid oligomers targeting Listeria-specific sequences on the 16S ribosomal subunit were evaluated for their abilities to hybridize to whole cells by fluorescence in situ hybridization (FISH). Four of these probes yielded weak or no fluorescent signals after hybridization and were not investigated further. The remaining two FISH-compatible probes, LisUn-3 and LisUn-11, were evaluated for their reactivities against 22 Listeria strains and 17 other bacterial strains belonging to 10 closely related genera. Hybridization with BacUni-1, a domain-specific eubacterial probe, was used as a positive control for target accessibility in both Listeria spp. and nontarget cells. RNase ...
Design And Evaluation Of Peptide Nucleic Acid Probes For Specific Identification Of Candida Albicans., 2018 Iowa State University
Design And Evaluation Of Peptide Nucleic Acid Probes For Specific Identification Of Candida Albicans., H. J. Kim, Byron F. Brehm-Stecher
Byron F. Brehm-Stecher
Candida albicans is an important cause of systemic fungal infections, and rapid diagnostics for identifying and differentiating C. albicans from other Candida species are critical for the timely application of appropriate antimicrobial therapy, improved patient outcomes, and pharmaceutical cost savings. In this work, two 28S rRNA-directed peptide nucleic acid-fluorescence in situ hybridization (PNA-FISH) probes, P-Ca726 (targeting a novel region of the ribosome) and P-CalB2208 (targeting a previously reported region), were evaluated. Hybridization conditions were optimized by using both fluorescence microscopy (FM) and flow cytometry (FCM), and probes were screened for specificity and discriminative ability against a panel of C. albicans ...
Stripping Away The Soil: Plant Growth Promoting Microbiology Opportunities In Aquaponics, 2018 University of Wisconsin - Milwaukee
Stripping Away The Soil: Plant Growth Promoting Microbiology Opportunities In Aquaponics, Ryan P. Bartelme, Ben O. Oyserman, Jesse E. Bloom, Osvaldo J. Sepulveda-Villet, Ryan J. Newton
Freshwater Faculty Articles
As the processes facilitated by plant growth promoting microorganisms (PGPMs) become better characterized, it is evident that PGPMs may be critical for successful sustainable agricultural practices. Microbes enrich plant growth through various mechanisms, such as enhancing resistance to disease and drought, producing beneficial molecules, and supplying nutrients and trace metals to the plant rhizosphere. Previous studies of PGPMs have focused primarily on soil-based crops. In contrast, aquaponics is a water-based agricultural system, in which production relies upon internal nutrient recycling to co-cultivate plants with fish. This arrangement has management benefits compared to soil-based agriculture, as system components may be designed ...
Mapping Water Availability, Cost And Projected Consumptive Use In The Eastern United States With Comparisons To The West, 2018 Sandia National Laboratories
Mapping Water Availability, Cost And Projected Consumptive Use In The Eastern United States With Comparisons To The West, Vincent C. Tidwell, Barbie D. Moreland, Calvin R. Shaneyfelt, Peter Kobos
Environmental Science and Management Faculty Publications and Presentations
The availability of freshwater supplies to meet future demand is a growing concern. Water availability metrics are needed to inform future water development decisions. Furthermore, with the help of water managers, water availability was mapped for over 1300 watersheds throughout the 31-contiguous states in the eastern U.S. complimenting a prior study of the west. The compiled set of water availability data is unique in that it considers multiple sources of water (fresh surface and groundwater, wastewater and brackish groundwater); accommodates institutional controls placed on water use; is accompanied by cost estimates to access, treat and convey each unique source ...
Assessing Surface Flowpath Interception By Vegetative Buffers Using Arcgis Hydrologic Modeling And Geospatial Analysis For Rock Creek Watershed, Central Iowa, David F. Webber, Amazon.Com, Inc., Steven K. Mickelson, Matthew J. Helmers, Kapil Arora, Brian K. Gelder, Manish Shrivastav, Casey J. Judge
Agricultural and Biosystems Engineering Publications
Nonpoint-source (NPS) pollution is a major cause of surface water quality degradation due to the transport of chemicals, nutrients, and sediments into lakes and streams. Vegetative buffers comprise several effective landscape best management practices (BMPs) that include vegetative filter strips (VFS) and grassed waterways. However, some BMPs are less effective due to concentrated surface flow, improper cropland-to-VFS area ratios, and surface flowpaths that partially or completely bypass vegetative buffers. The overall objective of this study was to quantify the accuracy of simulated flowpaths relative to observed and global positioning system (GPS)-assisted ground-truthed surface flowpaths for improved placement of VFS ...
Atmospheric Water Vapor Transport In Ncep–Ncar Reanalyses: Comparison With River Discharge In The Central United States, William J. Gutowski Jr., Yibin Chen, Zekai Ötles
William J. Gutowski, Jr.
The authors extract the water transport produced by the National Centers for Environmental Prediction reanalysis for a 10-yr period, 1984–93, and compare its convergence into two river basins with an independent dataset, river discharge (streamflow). Analysis focuses on two basins in the United States, the Upper Mississippi and the Ohio–Tennessee Basins, where the relatively high density of routine upper-air observations might be expected to give the reanalysis its closest rendition of the actual water transport. Over periods of several years, water input by the atmosphere should match water output from these basins in streamflow. However, in both basins ...
Evaluating Potential For Water Quality Decline In Maine Lakes, 2017 University of Maine
Evaluating Potential For Water Quality Decline In Maine Lakes, Kaci N. Fitzgibbon
Electronic Theses and Dissertations
Understanding lake vulnerability with respect to eutrophication and loss of water quality is important for sustainability of aquatic ecosystems. This project aims at identifying and quantifying the effects of relevant physiochemical, climate, and watershed characteristics on lake vulnerability in order to develop management decision tools for the Maine Department of Environmental Protection (MEDEP). In a changing chemical and physical environment, using independent variables from each of these categories and then relating them to the summer lake epilimnetic phosphorus (P) concentrations allows for development of models to inform stakeholders of lake vulnerability to eutrophication problems.
We studied 24 lakes covering a ...
Use Of Long Term Weather Data And Spatially Delineated Field Attributes To Predict Water And Energy Conservation From Variable Rate Irrigation, 2017 University of Nebraska - Lincoln
Use Of Long Term Weather Data And Spatially Delineated Field Attributes To Predict Water And Energy Conservation From Variable Rate Irrigation, Sahil Sharma
Biological Systems Engineering--Dissertations, Theses, and Student Research
The declining levels of the Ogallala aquifer calls for more judicious use of water. Studies have shown that VRI has the potential for water savings. But adoption of VRI is still very low. The major reason is lack of information on the returns from the VRI systems and its feasibility in different fields. Also, a quantification of the required reduction in prices of VRI is necessary. So, an economic return analysis of VRI strategies was done to compare it to uniform irrigation management (UIM) using a water balance model based on long term weather data and field properties for a ...
Bonneville Basin Data, 2017 U.S. Geological Survey
Bonneville Basin Data, Larry Benson
Data Sets for USGS Research
In the Bonneville Basin folder, all data were reported in: Benson, L.V., Lund, S.P., Smoot, J.P., Rhode, D.E., Spencer, R.J., Verosub, K.L., Louderback, L.A., Johnson, C.A., Rye, R.O., Negrini, R., 2011. The rise and fall of Lake Bonneville between 45 and 10.5 ka. Quaternary International 235, 57-69.
General Comment: in most cases an age model based on 14C analyses is not included with the data sets although ones were created for the original publications. Given the general problems with 14C ages in ...
Streamflow In The Upper Mississippi River Basin As Simulated By Swat Driven By 20th Century Contemporary Results Of Global Climate Models And Narccap Regional Climate Models, 2017 Iowa State University
Streamflow In The Upper Mississippi River Basin As Simulated By Swat Driven By 20th Century Contemporary Results Of Global Climate Models And Narccap Regional Climate Models, Eugene S. Takle, Manoj K. Jha, Er Lu, Raymond W. Arritt, William J. Gutowski
William J. Gutowski, Jr.
We use Soil and Water Assessment Tool (SWAT) when driven by observations and results of climate models to evaluate hydrological quantities, including streamflow, in the Upper Mississippi River Basin (UMRB) for 1981–2003 in comparison to observed streamflow. Daily meteorological conditions used as input to SWAT are taken from (1) observations at weather stations in the basin, (2) daily meteorological conditions simulated by a collection of regional climate models (RCMs) driven by reanalysis boundary conditions, and (3) daily meteorological conditions simulated by a collection of global climate models (GCMs). Regional models used are those whose data are archived by the ...
Origins And Transformations Of Dissolved Organic Matter In Large Arctic Rivers, 2017 Old Dominion University
Origins And Transformations Of Dissolved Organic Matter In Large Arctic Rivers, Karl Kaiser, Maria Canedo-Oropeza, Rachel Mcmahon, Eainer M. W. Amon
OEAS Faculty Publications
Arctic river watersheds are important components of the global climate system and show an amplified response to climate change. Here, we characterize origins and transformations of dissolved organic matter (DOM) in five major Arctic rivers (Kolyma, Lena, Yenisei, Ob, Mackenzie) over 3 years with seasonal sampling periods using measurements of carbohydrates, amino acids, bacterial biomarkers (D-amino acids), and plant protein biomarkers (hydroxyproline). A strong seasonal cycle of bioavailable DOM export was observed that correlated with discharge, vegetation, river morphology and water residence time. The chemical composition of bioavailable DOM was different among rivers reflecting unique characteristics of Arctic river watersheds ...
Using Hydroacoustics To Investigate Biological Responses In Fish Abundance To Restoration Efforts In The Penobscot River, Maine, Constantin C. Scherelis
Electronic Theses and Dissertations
Spatiotemporal advantages linked to hydroacoustic sampling techniques have caused a surge in the use of these techniques for fisheries monitoring studies applied over long periods of time in marine systems. Dynamic physical conditions such as tidal height, boat traffic, floating debris, and suspended particle concentrations result in unwanted noise signatures that vary in intensity and location within a hydroacoustic beam over time and can be mixed with the acoustic returns from intended targets (e.g., fish). Typical processing filters applied over long term datasets to minimize noise and maximize signals do not address spatiotemporal fluctuations of noise in dynamic systems ...
Final Report: Evaluation Of The Morphoedaphic Index And Sediment Diatoms For Inference Of Pre-European Settlement Total Phosphorus Concentration In Epa Region 10 Lakes, Rich Miller, Aaron Hook, Richard Petersen, Mark D. Sytsma
Mark D. Sytsma
Water quality in many Northwest lakes has declined over the past century due, in part, to increased anthropogenic nutrient loading (Edmonson and Lehman, 1981). Under the Clean Water Act, resource managers such as the Washington Department of Ecology, Oregon Department of Environmental Quality, and tribes are responsible for restoring and protecting the integrity of these waters. Targets for restoration or criteria for impairment are not well defined, however, and may naturally vary by geology, hydrology, morphometry, and climate. One way to determine whether lakes are impaired and to identify restoration targets is to assess lake reference conditions (EPA 2000). Reference ...
Forecasted Range Shifts Of Arid-Land Fishes In Response To Climate Change, 2017 University of Missouri
Forecasted Range Shifts Of Arid-Land Fishes In Response To Climate Change, James E. Whitney, Joanna B. Whittier, Craig Patrick Paukert, Julian D. Olden, Angela L. Strecker
Angela L. Strecker
Climate change is poised to alter the distributional limits, center, and size of many species. Traits may influence different aspects of range shifts, with trophic generality facilitating shifts at the leading edge, and greater thermal tolerance limiting contractions at the trailing edge. The generality of relationships between traits and range shifts remains ambiguous however, especially for imperiled fishes residing in xeric riverscapes. Our objectives were to quantify contemporary fish distributions in the Lower Colorado River Basin, forecast climate change by 2085 using two general circulation models, and quantify shifts in the limits, center, and size of fish elevational ranges according ...
Watershed Features And Stream Water Quality: Gaining Insight Through Path Analysis In A Midwest Urban Landscape, U.S.A., Jiayu Wu, Timothy W. Stewart, Janette R. Thompson, Randall K. Kolka, Kristie J. Franz
Timothy W. Stewart
Urban stream condition is often degraded by human activities in the surrounding watershed. Given the complexity of urban areas, relationships among variables that cause stream degradation can be difficult to isolate. We examined factors affecting stream condition by evaluating social, terrestrial, stream hydrology and water quality variables from 20 urban stream watersheds in central Iowa, U.S.A. We used path analysis to examine and quantify social and ecological factors related to variation in stream conditions. Path models supported hypotheses that stream water quality was influenced by variables in each category. Specifically, one path model indicated that increased stream water ...
Hydrologic Changes In Iowa's River Systems / Flood Resilience, 2017 Iowa Geological and Water Survey
Hydrologic Changes In Iowa's River Systems / Flood Resilience, Keith E. Schilling, Mark Ackelson, Thomas M. Isenhart
Thomas M. Isenhart
No abstract provided.
Economic Evaluation Of Coastal Land Loss In Louisiana, 2017 Louisiana State University
Economic Evaluation Of Coastal Land Loss In Louisiana, Stephen R. Barnes, Craig Bond, Nicholas Burger, Kate Anania, Aaron Strong, Sarah Weilant, Stephanie Virgets
Journal of Ocean and Coastal Economics
Louisiana has lost approximately 1,880 square miles of land over the past eighty years. Projections suggest that in a future without action, the next fifty years could result in the loss of 1,750 additional square miles of land area. As land loss continues, a large portion of the natural and man-made capital stocks of coastal Louisiana will be at greater risk of damage, either from land loss or from the associated increase in storm damage. We estimate the replacement cost of capital stock directly at risk from land loss ranges from approximately $2.1 billion to $3.5 ...
Micro-Spi Sediment Profile Imaging Micro-Inspector, 2017 California Polytechnic State University, San Luis Obispo
Micro-Spi Sediment Profile Imaging Micro-Inspector, Andrew P. Corvin, Caleb T. Davies, Matt R. Ferrari
This project was proposed by Dr. Brian Paavo through a desire to more easily study the benthic sediment layers of the ocean. To do so, he asked us to build a simple and compact machine for use in sediment profile imagery (SPI). Although devices like this already exist, they are all large scale devices that require a ship with a crane to deploy, which is expensive and time consuming. Instead, he desired a “micro” SPI, which is capable of being deployed from a small vessel that can easily navigate shallow waters. Our interpretation of these requirements was as follows: a ...
Long-Term Records Of Climate-Induced Changes In The Zooplankton Of West-Greenland Lakes, 2017 Dickinson College
Long-Term Records Of Climate-Induced Changes In The Zooplankton Of West-Greenland Lakes, Helen Schlimm
Student Honors Theses By Year
Recent research documents climate-induced changes in the algal communities of West Greenland lakes; however, less is known about the response of zooplankton to climate change effects in this region. Zooplankton are predominantly the top predator in these lakes, and thus may be changing due to direct climate effects on physical lake habitat and chemistry or indirect effects on their food source. Cladoceran remains from two lake sediment cores were collected in the Kangerlussuaq region of southwest Greenland: SS1341, located midway between the Greenland ice sheet and the coast, and SS901, close in proximity to the ice sheet. Modern zooplankton data ...