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Articles 1 - 30 of 3635
Full-Text Articles in Other Environmental Sciences
A Better Great Plains: Bridging The Implementation Gap For A Better Future, David W. Sandahl
A Better Great Plains: Bridging The Implementation Gap For A Better Future, David W. Sandahl
School of Natural Resources: Dissertations, Theses, and Student Research
The Northern Great Plains is experiencing extensive native grassland loss and landscape degradation, jeopardizing both ecological integrity and the socio-economic systems that rely upon these ecosystems. In an early effort to lessen degradation, the United States Department of Agriculture (USDA) introduced the Conservation Reserve Program (CRP) which generated ecosystem services benefits such as reduced soil erosion, improved water quality, and increased species diversity through the retirement of cropland and rangeland for 10- or 15-year contracts. However, CRP has not fully modernized alongside today’s agriculturalists and adoption remains shaped by an historically fraught socio-political context characterized by deep-seated mistrust between ranchers, …
Confocal Laser Scanning Microscopy As A Method For Identifying Variation In Puparial Morphology And Establishing Characters For Taxonomic Determination, Christian Elowsky, Leon G. Higley
Confocal Laser Scanning Microscopy As A Method For Identifying Variation In Puparial Morphology And Establishing Characters For Taxonomic Determination, Christian Elowsky, Leon G. Higley
School of Natural Resources: Faculty Publications
Calliphoridae, or blow flies, are of much ecological and practical importance given their roles in decompositional ecology, medical and veterinary myiasis, and forensic entomology. As ephemeral and rapidly developing species, adults are frequently not present for identification, but puparia (the remaining outer integument of the third instar larvae) are frequently found. These heavily sclerotized remains are stable in the environment but they are of a conservative character. Historically, scanning electron microscopy (SEM) has been used for characterization, a technique which is not only time-consuming but also often expensive, effectively making large numbers of specimens impossible to quantify. As an alternative, …
Does Biofluorescence Enhance Visual Signals In Birds-Of-Paradise?, R. P. Martin, E. M. Carr, J. S. Sparks
Does Biofluorescence Enhance Visual Signals In Birds-Of-Paradise?, R. P. Martin, E. M. Carr, J. S. Sparks
School of Natural Resources: Faculty Publications
No abstract provided.
Impacts Of Irrigated And Non-Irrigated Land Use On Convective Environments And Related Diagnostic Variables During Grainex In Nebraska, Usa, Daniel Whitesel, Rezaul Mamood
Impacts Of Irrigated And Non-Irrigated Land Use On Convective Environments And Related Diagnostic Variables During Grainex In Nebraska, Usa, Daniel Whitesel, Rezaul Mamood
School of Natural Resources: Faculty Publications
No abstract provided.
Woody Plant Reinvasion Shortens The Lifespan Of Grassland Restoration Treatments, D. T. Fogarty, M. Beadle, C. R. Allen, C. Bielski, D. Twidwell
Woody Plant Reinvasion Shortens The Lifespan Of Grassland Restoration Treatments, D. T. Fogarty, M. Beadle, C. R. Allen, C. Bielski, D. Twidwell
School of Natural Resources: Faculty Publications
No abstract provided.
Heat Stress Induced By Irrigation Over The Us Great Plains And Related Uncertainties, L. Chen, I. C. Achugbu, Rezaul Mamood, K. Kintziger, J. Bell, G. Meredith
Heat Stress Induced By Irrigation Over The Us Great Plains And Related Uncertainties, L. Chen, I. C. Achugbu, Rezaul Mamood, K. Kintziger, J. Bell, G. Meredith
School of Natural Resources: Faculty Publications
No abstract provided.
Proximal Remote Sensing: An Essential Tool For Bridging The Gap Between High Resolution Ecosystem Monitoring And Global Ecology, Z. Pierrat, T. Magney, W. Richardson, B. Runkle, J. Diehl, X. Yang, J Gamon Et Al.
Proximal Remote Sensing: An Essential Tool For Bridging The Gap Between High Resolution Ecosystem Monitoring And Global Ecology, Z. Pierrat, T. Magney, W. Richardson, B. Runkle, J. Diehl, X. Yang, J Gamon Et Al.
School of Natural Resources: Faculty Publications
No abstract provided.
Annual Variation In Attribute Importance To Upland Game Hunter Satisfaction In Nebraska, M. P. Gruntarod, J. J. Lusk, C. J. Chizinski
Annual Variation In Attribute Importance To Upland Game Hunter Satisfaction In Nebraska, M. P. Gruntarod, J. J. Lusk, C. J. Chizinski
School of Natural Resources: Faculty Publications
No abstract provided.
Delineating Ecologically Distinct Groups For Annual Cycle Management Of A Declining Shorebird, E. C. Knight, J. Carlisle, A. J. Boyce, D. Bradley, P. Cimprich, S. Coates, L. A. Powell Et Al.
Delineating Ecologically Distinct Groups For Annual Cycle Management Of A Declining Shorebird, E. C. Knight, J. Carlisle, A. J. Boyce, D. Bradley, P. Cimprich, S. Coates, L. A. Powell Et Al.
School of Natural Resources: Faculty Publications
No abstract provided.
Population Increases Of The Threatened American Burying Beetle (Nicrophorus Americanus) Linked To Large-Scale Collaborations In A Working Lands Ecoregion, C. P. Roberts, A. K. Ludwig, D. T. Fogarty, E. F. Stuber, Daniel R. Uden, T. L. Walker Jr., D. Twidwell
Population Increases Of The Threatened American Burying Beetle (Nicrophorus Americanus) Linked To Large-Scale Collaborations In A Working Lands Ecoregion, C. P. Roberts, A. K. Ludwig, D. T. Fogarty, E. F. Stuber, Daniel R. Uden, T. L. Walker Jr., D. Twidwell
School of Natural Resources: Faculty Publications
No abstract provided.
Devising Optimized Maize Nitrogen Stress Indices In Complex Field Conditions From Uav Hyperspectral Imagery, J. Li, Y. Ge, J. Gamon, L. A. Puntel Et Al.
Devising Optimized Maize Nitrogen Stress Indices In Complex Field Conditions From Uav Hyperspectral Imagery, J. Li, Y. Ge, J. Gamon, L. A. Puntel Et Al.
School of Natural Resources: Faculty Publications
No abstract provided.
Human Recreation Influences Activity Of A Large Carnivore In An Urban Landscape, E. C. Bolas, J. F. Benson, R. V. Blakey
Human Recreation Influences Activity Of A Large Carnivore In An Urban Landscape, E. C. Bolas, J. F. Benson, R. V. Blakey
School of Natural Resources: Faculty Publications
No abstract provided.
Examination Of Cooperative Extension As A Bridging Organization To Enhance Cross Boundary Collaborative Water Management, Mark E. Burbach, S. Kennedy, W. M. Eaton, K. J. Brasier, R. R. Rudnick, W. Whitmer
Examination Of Cooperative Extension As A Bridging Organization To Enhance Cross Boundary Collaborative Water Management, Mark E. Burbach, S. Kennedy, W. M. Eaton, K. J. Brasier, R. R. Rudnick, W. Whitmer
School of Natural Resources: Faculty Publications
No abstract provided.
Northern Bobwhite Habitat Selection During The Nonbreeding Season In A Riparian Corridor In Colorado, J. M. Wolske, A. C. Behney, L. A. Powell
Northern Bobwhite Habitat Selection During The Nonbreeding Season In A Riparian Corridor In Colorado, J. M. Wolske, A. C. Behney, L. A. Powell
School of Natural Resources: Faculty Publications
No abstract provided.
Cover Crops Can Reduce Greenhouse Gas Emissions From No-Till Maize In Southern Brazil: Insights From A Long-Term Field Experiment, Guilherme Rosa Da Silva, Adam J. Liska, Cimélio Bayer
Cover Crops Can Reduce Greenhouse Gas Emissions From No-Till Maize In Southern Brazil: Insights From A Long-Term Field Experiment, Guilherme Rosa Da Silva, Adam J. Liska, Cimélio Bayer
Adam Liska Papers
Brazil is one of the countries that has the most agricultural area under no-till (NT) management. This research study aims to evaluate life-cycle greenhouse gas (GHG) emissions from maize (M) grain production in agroecosystems that used different cover crops under NT management in southern Brazil. The data for this study were from a long-term 41-year field experiment in southern Brazil. The long-term experiment evaluated the effects of fallow (F) and cover crops (oat (O), vetch (V), cowpea (B), pigeon pea (P), and lablab (L)) on nitrous oxide and methane emissions and soil carbon (C) sequestration in maize agroecosystems. Five cropping …
The Complete Genome Sequence Of Splendidofilaria Pectoralis (Onchocercidae, Rhabditida, Chromadorea, Nematoda), Andrew Sweet, Robert E. Wilson, Jack Reakoff, Sarah A. Sonsthagen, Colleen Hurst, Stacy Pirro
The Complete Genome Sequence Of Splendidofilaria Pectoralis (Onchocercidae, Rhabditida, Chromadorea, Nematoda), Andrew Sweet, Robert E. Wilson, Jack Reakoff, Sarah A. Sonsthagen, Colleen Hurst, Stacy Pirro
School of Natural Resources: Faculty Publications
We present the complete genome sequence of Splendidofilaria pectoralis, a nematode parasite of grouse (Aves: Galliformes: Tetraonini). Illumina paired-end reads were assembled by a de novo method followed by a finishing step. The raw and assembled data are publicly available via GenBank: Sequence Read Archive (SRR28509439) and assembled genome (JBFSWT000000000).
Performance Of Acoustic Telemetry And Space Use Of Pallid Sturgeon In The Lower Platte River, Nebraska, Christopher F. Pullano
Performance Of Acoustic Telemetry And Space Use Of Pallid Sturgeon In The Lower Platte River, Nebraska, Christopher F. Pullano
School of Natural Resources: Dissertations, Theses, and Student Research
Pallid Sturgeon (Scaphirhynchus albus) are centenarian, potamodromous, rheophiles that historically occupied the Missouri River and Mississippi River basins. Listed on the U.S. Endangered Species Act in 1990, population declines are attributed to habitat fragmentation and degradation, as well as overharvest, and hybridization. A knowledge gap exists regarding the extent to which tributaries facilitate key life stages for Pallid Sturgeon. This study evaluated the capacity of acoustic telemetry to monitor the movements of Pallid Sturgeon in a shallow, braided tributary to the Missouri River. The specific objectives were to (1) evaluate the environmental variables influencing the performance of acoustic …
Occupancy Of Fish Species Of Greatest Conservation Need And Temporal Patterns Of Assemblage Occurrence In Sandhills Ecoregion, Nebraska Streams, Braxton M. Newkirk
Occupancy Of Fish Species Of Greatest Conservation Need And Temporal Patterns Of Assemblage Occurrence In Sandhills Ecoregion, Nebraska Streams, Braxton M. Newkirk
School of Natural Resources: Dissertations, Theses, and Student Research
Fish species’ occurrence is influenced by environmental conditions across multiple spatial and temporal scales. Alteration to stream systems has the potential to affect occurrence patterns of fish species. Stream systems of the North American Great Plains face threats originating from climate change and anthropogenic activities resulting in negative implications for many fish species. The Sandhills Ecoregion, Nebraska is considered one of the largest intact grasslands in North America, and thus may experience fewer threats than surrounding areas. Stream systems of the Sandhills Ecoregion are home to 12 fish species of greatest conservation need (SGCN). Little context exists regarding the environmental …
Alabama Agricultural Producers’ Experiences With Wild Pigs (Sus Scrofa) And Their Preferences Concerning Wild Pig Management, Hailey E. Ellis, Luren M. Jaebker, Alan D. Bright, Mark D. Smith, Keith M. Carlisle
Alabama Agricultural Producers’ Experiences With Wild Pigs (Sus Scrofa) And Their Preferences Concerning Wild Pig Management, Hailey E. Ellis, Luren M. Jaebker, Alan D. Bright, Mark D. Smith, Keith M. Carlisle
United States Department of Agriculture Wildlife Services: Staff Publications
Government agencies and landowners use a variety of lethal methods to reduce invasive wild pig populations and resulting agricultural damages. To provide decision-makers with information regarding Alabama farmers’ experiences with wild pigs and their preferences for management actions, we surveyed Alabama Farmers Federation members in 2020. We found that wild pigs were commonly present on livestock, timber, and crop production acreage, but wild pig damages and costs were much more common among crop producers. Respondents' wildlife acceptance capacity for wild pigs was low and all lethal control methods were considered aceptable by most reposndents, particularly those performed by landowners. While …
Intrinsic And Environmental Drivers Of Pairwise Cohesion In Wild Canis Social Groups, John F. Benson
Intrinsic And Environmental Drivers Of Pairwise Cohesion In Wild Canis Social Groups, John F. Benson
School of Natural Resources: Faculty Publications
Animals within social groups respond to costs and benefits of sociality by adjusting the proportion of time they spend in close proximity to other individuals in the group (cohesion). Variation in cohesion between individuals, in turn, shapes important group-level processes such as subgroup formation and fission–fusion dynamics. Although critical to animal sociality, a comprehensive understanding of the factors influencing cohesion remains a gap in our knowledge of cooperative behavior in animals. We tracked 574 individuals from six species within the genus Canis in 15 countries on four continents with GPS telemetry to estimate the time that pairs of individuals within …
Appraising Groundwater Quality And Probabilistic Human Health Risks From Fluoride-Enriched Groundwater Using The Pollution Index Of Groundwater (Pig) And Gis: A Case Study Of Adama Town And Its Vicinities In The Central Main Ethiopian Rift Valley, Hassen Shube, Shankar Karuppannan, Muhammed Haji, Balamurugan Paneerselvam, Nafyad Kawo, Abraham Mechal, Ashu Fekadu
Appraising Groundwater Quality And Probabilistic Human Health Risks From Fluoride-Enriched Groundwater Using The Pollution Index Of Groundwater (Pig) And Gis: A Case Study Of Adama Town And Its Vicinities In The Central Main Ethiopian Rift Valley, Hassen Shube, Shankar Karuppannan, Muhammed Haji, Balamurugan Paneerselvam, Nafyad Kawo, Abraham Mechal, Ashu Fekadu
School of Natural Resources: Faculty Publications
This research's main objective is to identify the level of contamination in drinking water in Adama town and its environs by employing PIG, GIS and HHRA. The physical–chemical parameters of groundwater were determined, and the results were compared to regional and global drinking water quality guidelines. The pH of groundwater is alkaline, and the contents of Ca2+, Na+, HCO3 −, and F− in the majority of samples surpassed the permissible drinking limit. The hydrochemical facies were identified in the following order: Ca–Mg–HCO3, Na–Ca–HCO3, and Na–HCO3. Cation …
Applying Circuit Theory To Describe Changes In Structural Landscape Connectivity In Response To Wildfire, Christian Ross Nielsen
Applying Circuit Theory To Describe Changes In Structural Landscape Connectivity In Response To Wildfire, Christian Ross Nielsen
School of Natural Resources: Dissertations, Theses, and Student Research
Understanding and conserving ecological connectivity is critical to the preservation of vulnerable landscapes. Circuit theory, in which landscapes are imagined as circuit boards with varying resistances to the flow of current, is being increasingly used to model spatially explicit connectivity of landscapes and to inform land management and conservation decision-making. Utilizing continuous, quantitative estimates of percent cover by five land cover functional groups to create a conductance surface, this study expanded upon an established application of circuit theory that used the open-source software Circuitscape to model species-agnostic, omnidirectional connectivity. This model was automated using Python to create time-series connectivity maps …
Occurrence, Inputs, And Ecological Significance Of Antibiotics And Pharmaceuticals In Western Nebraska Streams, Katelyn F. Glause
Occurrence, Inputs, And Ecological Significance Of Antibiotics And Pharmaceuticals In Western Nebraska Streams, Katelyn F. Glause
School of Natural Resources: Dissertations, Theses, and Student Research
Few emerging environmental contaminants are as concerning as antibiotics. Human and animal health benefits greatly from the prudent use of antibiotics, yet we give little thought to environmental release of these biologically active compounds. Environmental occurrence of these and other pharmaceutical compounds must be measured in different environmental compartments such as municipal wastewater and in the vicinity of large animal feeding operations to understand potential effects. This study reports the results of a monitoring study in western Nebraska, with a large population of livestock and smaller but more concentrated population of humans, comparing the relative environmental concentrations and loading from …
Analysis Of Drought-Flood Abrupt Alternation Events And Their Impacts In Kenya, Betty Makena
Analysis Of Drought-Flood Abrupt Alternation Events And Their Impacts In Kenya, Betty Makena
School of Natural Resources: Dissertations, Theses, and Student Research
Drought-Flood Abrupt Alternation (DFAA) is a compound disaster event that refers to the abrupt shift of extreme drought events to extreme floods resulting in exacerbated impacts on already vulnerable communities and hindering their coping abilities. This study aimed to analyze drought-flood abrupt alternation events and their impacts in Kenya. The first chapter aimed to understand historical drought events in the Greater Horn of Africa and their impacts, while drawing comparisons with the recent 2020-2022 drought period, referred to as the ‘triple dip La Niña’. Datasets used in this study include the Climate Hazards Group InfraRed Precipitation with Station (CHIRPS), Normalized …
Remotely Sensed Early Warning Of Algal Blooms In An Eastern Nebraska Reservoir: A Comparison Of Temporal And Spatial Indicators, Mercy Kipenda
Remotely Sensed Early Warning Of Algal Blooms In An Eastern Nebraska Reservoir: A Comparison Of Temporal And Spatial Indicators, Mercy Kipenda
School of Natural Resources: Dissertations, Theses, and Student Research
Cyanobacterial harmful algal blooms (CyanoHABs) detrimentally affect human, animal, and ecosystem health. Remotely sensed early warning systems for cyanoHABs in inland lakes could contribute to more proactive water quality monitoring and help mitigate negative impacts. Advances in freely available remote sensing imagery, with finer spatial, temporal, and spectral resolutions, present new opportunities for the development and comparative analysis of methods to detect sudden deterioration in lake water quality. In this thesis, I compared and tested for temporal and spatial early warning signals of cyanoHABs in field-based and remotely sensed datasets from 2019 to 2023 in Pawnee Lake in southeast Nebraska, …
Impacts Of Invasive Carp And Their Population Dynamics On Fish Communities In The Missouri River, Joshua F. Kocik
Impacts Of Invasive Carp And Their Population Dynamics On Fish Communities In The Missouri River, Joshua F. Kocik
School of Natural Resources: Dissertations, Theses, and Student Research
Invasive Carp species: Silver Carp Hypophthalmichthys molitrix, Bighead Carp Hypophthalmichthys nobilis, Grass Carp Ctenopharyngodon idella, and Black Carp Mylopharyngodon piceus have both potential and realized abilities to negatively impact native species. Specifically, Bighead Carp and Silver Carp as filter feeders have been theorized to be detrimental not only to adult filter-feeding species, but to many fish which rely on plankton and algae in their early-life stages. The impact of Invasive Carp on the overall fish community remains underexplored. The fish communities below Gavins Point Dam (Invasive Carp present) and Fort Randall Dam (Invasive Carp absent) afford the …
Assessing, Restoring, And Centering Social–Ecological Relationships For Advancing Social–Ecological Resilience In The Northern Great Plains Grasslands, Katia Pilar Carranza Bernal
Assessing, Restoring, And Centering Social–Ecological Relationships For Advancing Social–Ecological Resilience In The Northern Great Plains Grasslands, Katia Pilar Carranza Bernal
School of Natural Resources: Dissertations, Theses, and Student Research
The Northern Great Plains grasslands are social-ecological systems that were shaped by evolutionary and Indigenous social-ecological relationships. European colonization disrupted many of these interactions, including the coupling of fire and grazing, and degraded social-ecological resilience, shifting these grasslands to a new state. For those reasons, my research focused on assessing, restoring, and centering evolutionary and Indigenous social-ecological relationships for advancing social-ecological resilience in the Northern Great Plains grasslands. I first performed a study in the Nebraska Sandhillls assessing the potential of patch-burn grazing to support grassland resilience by comparing its effects to those of rotational grazing. Through vegetation and bird …
Population Demography, Occupancy, And Connectivity Of Invasive Bigheaded Carp In The Platte River, Nebraska And Its Tributaries, Blake W. Logan
Population Demography, Occupancy, And Connectivity Of Invasive Bigheaded Carp In The Platte River, Nebraska And Its Tributaries, Blake W. Logan
School of Natural Resources: Dissertations, Theses, and Student Research
Silver Carp Hypophthalmichthys molitrix and Bighead Carp H. nobilis, collectively referred to as bigheaded carp, are invasive species in the United States of America that have expanded their range throughout the Missouri River basin in the last three decades. It may be desirable to develop management plans directed at the monitoring, control, or removal of bigheaded carp within the Missouri River basin. However, a knowledge gap exists regarding bigheaded carp ecology in Missouri River tributaries, which may be important for the development of management plans. As such, this study characterized bigheaded carp population demographics, occupancy, and connectivity in …
Virtual Fencing In Livestock Management: Effects On Beef Cattle Stress And Enhancing Wildlife Conservation, Kaitlyn E. Dozler
Virtual Fencing In Livestock Management: Effects On Beef Cattle Stress And Enhancing Wildlife Conservation, Kaitlyn E. Dozler
School of Natural Resources: Dissertations, Theses, and Student Research
I examined the effects of virtual fencing on beef cattle stress and how implementing the technology can aid wildlife habitat conservation at the University of Nebraska Gudmundsen Sandhills laboratory (GSL) near Whitman, NE. First, I examined how virtual fencing influences acute heart rate changes in beef cattle fitted with the virtual fencing collars. No significant difference in the average heart rate of a cow (P > 0.05) was observed between the 30 min control and virtual fenced periods for both trial dates. Second, I examined the influence of topography on wildlife species richness and presence at GSL using wildlife camera …
Evaluation Of An Autonomous Acoustic Surveying Technique For Grassland Bird Communities In Nebraska, Grace E. Schuster, Leroy J. Walston, Andrew R. Little
Evaluation Of An Autonomous Acoustic Surveying Technique For Grassland Bird Communities In Nebraska, Grace E. Schuster, Leroy J. Walston, Andrew R. Little
School of Natural Resources: Faculty Publications
Monitoring trends in wildlife communities is integral to making informed land management decisions and applying conservation strategies. Birds inhabit most niches in every environment and because of this they are widely accepted as an indicator species for environmental health. Traditionally, point counts are the common method to survey bird populations, however, passive acoustic monitoring approaches using autonomous recording units have been shown to be cost-effective alternatives to point count surveys. Advancements in automatic acoustic classification technologies, such as BirdNET, can aid in these efforts by quickly processing large volumes of acoustic recordings to identify bird species. While the utility of …