Legacy Effects Of Long-Term Nitrogen Fertilizer Application On The Fate Of Nitrogen Fertilizer Inputs In Continuous Maize, Hanna J. Poffenbarger, John E. Sawyer, Daniel W. Barker, Daniel C. Olk, Johan Six, Michael J. Castellano
Nitrogen fertilizer management can impact soil organic C (SOC) stocks in cereal-based cropping systems by regulating crop residue inputs and decomposition rates. However, the impact of long-term N fertilizer management, and associated changes in SOC quantity and quality, on the fate of N fertilizer inputs is uncertain. Using two 15-year N fertilizer rate experiments on continuous maize (Zea mays L.) in Iowa, which have generated gradients of SOC, we evaluated the legacy effects of N fertilizer inputs on the fate of added N. Across the historical N fertilizer rates, which ranged from 0 to 269 kg N ha−1 yr ...
Indirect Greenhouse Gas Dynamics In Karst Groundwater Systems Under Agricultural Land Use, 2018 Western Kentucky University
Indirect Greenhouse Gas Dynamics In Karst Groundwater Systems Under Agricultural Land Use, Stacy Wayne Antle
Masters Theses & Specialist Projects
Greenhouse gases (GHGs) are a major global environmental concern, because their concentrations have continuously increased over the past few centuries, due to global population growth, fossil fuel dependency, and the Industrial Revolution. Since these gases are naturally occurring phenomena, they will never be completely eliminated. Efforts to reduce them span numerous scientific attempts, with minimal improvements in reducing their atmospheric concentrations. In agricultural land practices, greenhouse gases are common byproducts that affect the atmosphere and, potentially, the groundwater where livestock and fertilizers are key contributors. Little is known about the fate of such greenhouse gases in dissolved form, known as ...
Land-Use Impacts On The Hydrology Of The Hidden River Groundwater Subbasin, Horse Cave, Hart County, Kentucky, 2018 Western Kentucky University
Land-Use Impacts On The Hydrology Of The Hidden River Groundwater Subbasin, Horse Cave, Hart County, Kentucky, Cesalea N. Osborne
Masters Theses & Specialist Projects
No abstract provided.
Patterns And Drivers Of Recent Disturbances Across The Temperate Forest Biome, 2018 University of Natural Resources and Life Sciences (BOKU) Vienna, Institute of Silviculture
Patterns And Drivers Of Recent Disturbances Across The Temperate Forest Biome, Andreas Sommerfeld, Cornelius Senf, Brian Buma, Anthony W. D'Amato, Tiphaine Despres, Ignacio Díaz-Hormazábal, Shawn Fraver, Lee E. Frelich, Alvaro G. Gutiérrez, Sarah J. Hart, Brian J. Harvey, Hong S. He, Tomáš Hlásny, Andrés Holz, +
Geography Faculty Publications and Presentations
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 ...
Motivations, Specializations, Identities, And Constraints Associated With Hunting In Nebraska, 2018 University of Nebraska-Lincoln
Motivations, Specializations, Identities, And Constraints Associated With Hunting In Nebraska, Alisha Grams
Dissertations & Theses in Natural Resources
This research herein examines the statewide motivations, specializations, identities, and constraints of Nebraska resident hunters. An online survey was conducted in the fall of 2017 asking respondents about their motivations, skills, demographics, and constraints to personal hunting experiences to determine what factors affect hunters. We used factor analysis to examine the effect of motivations, specializations, and constraints to see which factors influence participation. By understanding multiple attributes of our hunters, we gain further insight into participation trends and recreationists needs and expectations. Results suggested that our biggest constraint to overcome is land access, while most people are motivated to hunt ...
Nebraska’S Wildlife Club; Nebraska Honors Program Clc Expanded Learning Opportunity Clubs, 2018 University of Nebraska-Lincoln
Nebraska’S Wildlife Club; Nebraska Honors Program Clc Expanded Learning Opportunity Clubs, Alexandrea E. Otto
Honors Expanded Learning Clubs
The goal of the club is to educate and explore with students the wildlife and nature that surrounds them every day. The main focus was to educate students on wildlife native to Nebraska; ranging all the way from West Nebraska to the wildlife found in cities such as Lincoln.
Monitoring And Evaluating The Influences Of Class V Injection Wells On Urban Karst Hydrology, 2018 Western Kentucky University
Monitoring And Evaluating The Influences Of Class V Injection Wells On Urban Karst Hydrology, James Adam Shelley
Masters Theses & Specialist Projects
The response of a karst aquifer to storm events is often faster and more severe than that of a non-karst aquifer. This distinction is often problematic for planners and municipalities, because karst flooding does not typically occur along perennial water courses; thus, traditional flood management strategies are usually ineffective. The City of Bowling Green (CoBG), Kentucky is a representative example of an area plagued by karst flooding. The CoBG, is an urban karst area (UKA), that uses Class V Injection Wells to lessen the severity of flooding. The overall effectiveness, siting, and flooding impact of Injection Wells in UKA’s ...
G-Bikes: Gettysburg Bike Share, 2018 Gettysburg College
G-Bikes: Gettysburg Bike Share, Matthew G. Palacio, Jeffrey J. Walters
The focus of this paper was to asses Gettysburg as possible location to implement a bike share program and ultimately to propose a framework for a successful program. We evaluated bike share programs across North America and created a list of criteria of successful programs. The second part of our data collection included a Google Forms survey which targeted three demographics, students, locals and tourists. We targeted our focus groups by posting on Facebook pages frequented by each demographic, as well as administering the survey in person with smart phones in Lincoln Square in Gettysburg. Our survey generated 134 responses ...
Algal Blooms In Arkansas Streams, Ponds, And Lakes, 2018 University of Arkansas, Fayetteville
Algal Blooms In Arkansas Streams, Ponds, And Lakes, Bradley J. Austin, Brie Olsen, Tate Wentz, Brian E. Haggard
Did you know that algae are a natural part of ponds, lakes, streams, and rivers? These organisms grow in the water (plankton) and on rocks, plants, and other surfaces (periphyton) and sometimes periphyton slough off into the water (seston). Most of the time these algae are hardly noticeable in waterbodies; however, sometimes they can form very noticeable algal blooms.
Unearthing The X-Streams:Visualizing Water Contamination, 2018 Singapore Management University
Unearthing The X-Streams:Visualizing Water Contamination, Akangsha Bandalkul, Angad Srivastava, Kishan Bharadwaj Shridhar, Jason Guan Jie Ong, Yanrong Zhang
Research Collection School Of Information Systems
The datasets released for VAST 2018 Mini Challenge 2 pertain to sensor readings capturing chemical concentrations and physical properties from water bodies in the Boonsong Lekagul wildlife preserve. This challenge is in continuation to the VAST 2017 Challenge, where the company Kasios was identified as the culprit in dumping the chemical - Methylosmoline. In the absence of actual chemical measurements in the soil, challenge participants need to visualize chemical contamination based on the proximal water bodies to identify trends of interest. A horizon plot developed helps to narrow down the complete list of 106 chemicals provided to only 7, from where ...
The Planet, 2018, Fall, 2018 Western Washington University
The Planet, 2018, Fall, Emily Stout, Huxley College Of The Environment, Western Washington University
No abstract provided.
Mid-Atlantic Forest Ecosystem Vulnerability Assessment And Synthesis: A Report From The Mid-Atlantic Climate Change Response Framework Project, 2018 Michigan Technological University
Mid-Atlantic Forest Ecosystem Vulnerability Assessment And Synthesis: A Report From The Mid-Atlantic Climate Change Response Framework Project, Patricia Leopold, Louis Iverson, Frank R. Thompson Iii, Leslie A. Brandt, Stephen D. Handler, Danielle Shannon, Matt Kelly, Et. Al.
School of Forest Resources and Environmental Science Publications
Forest ecosystems will be affected directly and indirectly by a changing climate over the 21st century. This assessment evaluates the vulnerability of 11 forest ecosystems in the Mid-Atlantic region (Pennsylvania, New Jersey, Delaware, eastern Maryland, and southern New York) under a range of future climates. We synthesized and summarized information on the contemporary landscape, provided information on past climate trends, and described a range of projected future climates. This information was used to parameterize and run multiple forest impact models, which provided a range of potential tree responses to climate. Finally, we brought these results before two multidisciplinary panels of ...
Sustaining Wetlands To Mitigate Disasters And Protect People, 2018 Utah State University
Sustaining Wetlands To Mitigate Disasters And Protect People, Joanna Endter-Wada, Karin M. Kettenring, Ariana E. Sutton-Grier
Watershed Sciences Faculty Publications
Hurricanes, flooding, droughts. Weather‐related disasters are dominating news cycles and causing widespread destruction, most recently with Typhoon Mangkhut and Hurricane Florence. The US had the most catastrophic hurricane season on record in 2017, with hundreds of billions of dollars in estimated damages. California is experiencing unprecedented tragedies from widespread wildfires and increased vulnerability to storms. Disasters that were once uncommon appear to be the new norm globally, and evidence suggests the frequency and impacts of extreme events will increase further with climate change.
Oyster Bag Sill Construction And Monitoring At Two Sites In Chesapeake Bay, 2018 Virginia Institute of Marine Science
Oyster Bag Sill Construction And Monitoring At Two Sites In Chesapeake Bay, Donna A. Milligan, C. Scott Hardaway Jr., Christine A. Wilcox, Walter I. Priest
The use of oyster shell bags as a means of shore protection along fetchlimited shorelines in Chesapeake Bay is growing. This method is an innovative use of a byproduct of the seafood industry and can provide habitat creation, water quality improvement, and shore protection. The landowner can install the bags themselves, and with the new living shoreline general permit in Virginia, these projects are easier than ever to afford and install. However, oyster shells are a limited resource that are needed for largescale oyster reef restoration with the Chesapeake Bay watershed, so determining the effectiveness of this shore protection strategy ...
Archetypes Of Community Wildfire Exposure From National Forests Of The Western Us, 2018 Portland State University
Archetypes Of Community Wildfire Exposure From National Forests Of The Western Us, Cody Evers, Alan A. Ager, Max Nielsen-Pincus, Palaiologos Palaiologou, Ken Bunzel
Environmental Science and Management Faculty Publications and Presentations
Risk management typologies and their resulting archetypes can structure the many social and biophysical drivers of community wildfire risk into a set number of strategies to build community resilience. Existing typologies omit key factors that determine the scale and mechanism by which exposure from large wildfires occur. These factors are particularly important for land managing agencies like the US Forest Service, which must weigh community wildfire exposure against other management priorities. We analyze community wildfire exposure from national forests by associating conditions that affect exposure in the areas where wildfires ignite to conditions where exposure likely occurs. Linking source and ...
Further Evidence For The Invasion And Establishment Of Pterois Volitans (Teleostei: Scorpaenidae) Along The Atlantic Coast Of The United States, 2018 South Carolina Department of Natural Resources, Marine Resources Research Institute,
Further Evidence For The Invasion And Establishment Of Pterois Volitans (Teleostei: Scorpaenidae) Along The Atlantic Coast Of The United States, H. Scott Meister, David M. Wyanski, Joshua K. Loefer, Steve W. Ross, Andrea M. Quattrini, Kenneth J. Sulak
USGS Staff -- Published Research
We document the continues population expansion of red lionfish, Pterois volitans, the first documented successful introduction of an invasive marine fish species from the western Pacific to Atlantic coastal water of the United States. Red lionfish are indigenous to the Indo-Pacific and have apparently established one or more breeding population on reefs off the southeastern United States. Fifty-nine specimens, most presumably adult red lionfish, were documented or collected on live-bottom reefs North Carolina, South Caroline, and Florida, and on a manmade structure off Georgia. Observation/collection depths and bottom water temperatures for these fish ranged from 4-99 m and 13 ...
Marine Threats Overlap Key Foraging Habitat For Two Imperiled Sea Turtle Species In The Gulf Of Mexico, 2018 Wetland and Aquatic Research Center, U.S. Geological Survey
Marine Threats Overlap Key Foraging Habitat For Two Imperiled Sea Turtle Species In The Gulf Of Mexico, Kristen M. Hart, Autumn R. Iverson, Ikuko Fujisaki, Margaret M. Lamont, David Bucklin, Donna J. Shaver
USGS Staff -- Published Research
Effective management of human activities affecting listed species requires understanding both threats and animal habitat-use patterns. However, the extent of spatial overlap between high-use foraging areas (where multiple marine species congregate) and anthropogenic threats is not well-known. Our modeling approach incorporates data on sea turtle spatial ecology and a suite of threats in the Gulf of Mexico to identify and map “hot spots” of threats to two imperiled turtle species. Of all 820 “high” threats grid cells, our tracked turtles foraged at least 1 day in 77% of them. Although threat data were not available outside the U.S. Exclusive ...
Irondequoit Bay Fish Stock Assessments 2005-2015, 2018 NYS DEC
Irondequoit Bay Fish Stock Assessments 2005-2015, Matthew J. Sanderson
Warm water fisheries assessments using standard gangs of gill nets were conducted in Irondequoit Bay in September of 2005, 2010, and 2015. In addition, a nighttime electrofishing survey was conducted in June 2009. The surveys were conducted to 1) assess the fish community; 2) determine the contribution of stocked fingerlings to the walleye (Sander vitreus) population; 3) estimate population characteristics of walleye, northern pike (Esox lucius), yellow perch (Perca flavescens), and largemouth bass (Micropterus salmoides), 4) compare fish community structure to statewide surveys; and 5) guide the development of appropriate management recommendations. From 2005 to 2015 overall gill net catch ...
Sea Squad, 2018 Goldsmiths, University of London
Sea Squad, Liam Geary Baulch
The Sea Squad is a band of cheerleaders against climate change. Taking action as a team in formation, they gather momentum, inviting all people to cheer with them, mimicking the infinitely expandable nature of the seas' molecular structure. The work was developed and performed as a bilingual project at Est-Nord-Est in Saint-Jean-Port-Joli, Quebec, Canada, and has since been performed and exhibited internationally. The following poems are some of the chants that Sea Squad use to get a crowd cheering together against climate change.
Ecology And Population Dynamics Of Salmonids In The Columbia River: Response Of Fishes To Anthropogenic Change In A Large Riverscape, Timothy Sean Elder
Dissertations and Theses
Freshwater ecosystems and the species that reside therein are disproportionately imperiled compared to terrestrial systems. Over the past 150 years, the Columbia River basin in the western United States has gone from one of the most productive and abundant salmon watersheds in the world, to having just a small fraction of its former salmon abundance. The cause of declines in salmon productivity and abundance are related to overlapping and confounding stressors including changes in large-scale climatic patterns and anthropogenic alterations within and adjacent to the Columbia River. Four main anthropogenic stressors have been identified as the leading causes of salmonid ...