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Articles 421 - 450 of 1354
Full-Text Articles in Other Environmental Sciences
Reconstruction Of Pre-Illinoian Ice Margins And Glaciotectonic Structures From Airborne Electromagnetic (Aem) Surveys At The Western Limit Of Laurentide Glaciation, Midcontinent U.S.A., Jesse T. Korus, Robert M. Joeckel, Jared D. Abraham, Anne-Sophie Høyer, Flemming Jørgensen
Reconstruction Of Pre-Illinoian Ice Margins And Glaciotectonic Structures From Airborne Electromagnetic (Aem) Surveys At The Western Limit Of Laurentide Glaciation, Midcontinent U.S.A., Jesse T. Korus, Robert M. Joeckel, Jared D. Abraham, Anne-Sophie Høyer, Flemming Jørgensen
School of Natural Resources: Faculty Publications
Early and early Middle Pleistocene glaciations in midcontinental USA are poorly understood relative to more recent Illinoian and Wisconsinan glaciations, largely because pre-Illinoian glacial landforms and deposits are eroded and buried. In this paper, we present a new interpretation of buried, pre-Illinoian glacial features along the Laurentide glacial margin in northeastern Nebraska using Airborne ElectroMagnetics (AEM) supplemented with borehole logs and 2m LiDAR elevation data. We detect and map large-scale (101–102 km) geological features using contrasts in electrical resistivity. The Laurentide glacial limit is marked by a continuous (>120 km) contrast between conductive (<15 Ω-m), clayey tills and resistive (>40 Ω-m) sandy sediments. Several …
Patterns In Spatial Use And Movement Of Silver Carp Among Tributaries And Main-Stem Rivers: Insight From Otolith Microchemistry Analysis, J. P. Werner, Q. J. Dean, M. A. Pegg, M. J. Hamel
Patterns In Spatial Use And Movement Of Silver Carp Among Tributaries And Main-Stem Rivers: Insight From Otolith Microchemistry Analysis, J. P. Werner, Q. J. Dean, M. A. Pegg, M. J. Hamel
School of Natural Resources: Faculty Publications
No abstract provided.
Juvenile Chinook Salmon Use Of Sandbar Willows In A Large-Scale, Simulated Riparian Floodplain: Microhabitat And Energetics, N. A. Fangue, D. E. Cocherell, F. Mauduit, J. Poletto, K. Carr, T. A. O'Rear, G. Soyster, S. Lorenzato, J. Carlon, M. L. Kavvas, Cech, J. Joseph Jr.
Juvenile Chinook Salmon Use Of Sandbar Willows In A Large-Scale, Simulated Riparian Floodplain: Microhabitat And Energetics, N. A. Fangue, D. E. Cocherell, F. Mauduit, J. Poletto, K. Carr, T. A. O'Rear, G. Soyster, S. Lorenzato, J. Carlon, M. L. Kavvas, Cech, J. Joseph Jr.
School of Natural Resources: Faculty Publications
No abstract provided.
Feeding Ecology Of Walia Ibex (Capra Walie) In Simien Mountains National Park, Ethiopia, D. Ejigu, A. Bekele, L. A. Powell
Feeding Ecology Of Walia Ibex (Capra Walie) In Simien Mountains National Park, Ethiopia, D. Ejigu, A. Bekele, L. A. Powell
School of Natural Resources: Faculty Publications
No abstract provided.
Simulated Atmospheric Response To Four Projected Land-Use Land-Cover Change Scenarios For 2050 In The North-Central United States, P. Flanagan, R. Mahmood, T. Sohl, M. Svoboda, B. Wardlow, M. J. Hayes, E. Rappin
Simulated Atmospheric Response To Four Projected Land-Use Land-Cover Change Scenarios For 2050 In The North-Central United States, P. Flanagan, R. Mahmood, T. Sohl, M. Svoboda, B. Wardlow, M. J. Hayes, E. Rappin
School of Natural Resources: Faculty Publications
No abstract provided.
Dynamic Landscapes In Northwestern North America Structured Populations Of Wolverines (Gulo Gulo), D. M. Krejsa, S. L. Talbot, S. Sonsthagen, T. S. Jung, A. J. Majoun, J. A. Cook
Dynamic Landscapes In Northwestern North America Structured Populations Of Wolverines (Gulo Gulo), D. M. Krejsa, S. L. Talbot, S. Sonsthagen, T. S. Jung, A. J. Majoun, J. A. Cook
School of Natural Resources: Faculty Publications
No abstract provided.
Assessment Of Dimension-Reduction And Grouping Methods For Catchment Response Time Estimation In Hungary, E. Nagy, J. Szilagyi, P. Torma
Assessment Of Dimension-Reduction And Grouping Methods For Catchment Response Time Estimation In Hungary, E. Nagy, J. Szilagyi, P. Torma
School of Natural Resources: Faculty Publications
No abstract provided.
Reply To Comment By S. Han And F. Tian On "A Calibration-Free Formulation Of The Complementary Relationship Of Evaporation For Continental-Scale Hydrology", J. Szilagyi, R. Crago, R. Qualls
Reply To Comment By S. Han And F. Tian On "A Calibration-Free Formulation Of The Complementary Relationship Of Evaporation For Continental-Scale Hydrology", J. Szilagyi, R. Crago, R. Qualls
School of Natural Resources: Faculty Publications
No abstract provided.
Calibration-Free Complementary Relationship Estimates Terrestrial Evapotranspiration Globally, N. Ma, J. Szilagyi, Y. Zhang
Calibration-Free Complementary Relationship Estimates Terrestrial Evapotranspiration Globally, N. Ma, J. Szilagyi, Y. Zhang
School of Natural Resources: Faculty Publications
No abstract provided.
Spatial And Temporal Trends And Variability Of Rainfall Using Long-Term Satellite Product Over The Upper Blue Nile Basin In Ethiopia, G. T. Ayehu, T. Tadesse, B. Gessesse
Spatial And Temporal Trends And Variability Of Rainfall Using Long-Term Satellite Product Over The Upper Blue Nile Basin In Ethiopia, G. T. Ayehu, T. Tadesse, B. Gessesse
School of Natural Resources: Faculty Publications
No abstract provided.
Combined Use Of Landsat 8 And Sentinel 2a Imagery For Improved Sugarcane Yield Estimation In Wonji-Shoa, Ethiopia, G. Abebe, T. Tadesse, B. G. Awoke
Combined Use Of Landsat 8 And Sentinel 2a Imagery For Improved Sugarcane Yield Estimation In Wonji-Shoa, Ethiopia, G. Abebe, T. Tadesse, B. G. Awoke
School of Natural Resources: Faculty Publications
No abstract provided.
Evaluating Student Attitudes And Learning At Remote Collegiate Soil Judging Events, R. Owen, A. Anderson, A. Bhandari, K. Clark, M. Davis, A. Dere, N. Jelinski, C. Moorberg, K. Osterloh, D. Presley, J. Turk, R. Young
Evaluating Student Attitudes And Learning At Remote Collegiate Soil Judging Events, R. Owen, A. Anderson, A. Bhandari, K. Clark, M. Davis, A. Dere, N. Jelinski, C. Moorberg, K. Osterloh, D. Presley, J. Turk, R. Young
School of Natural Resources: Faculty Publications
No abstract provided.
Manyclasses 1: Assessing The Generalizable Effect Of Immediate Feedback Versus Delayed Feedback Across Many College Classes, E.R. Fyfe, J. R. De Leeuw, P. F. Carvalho, R. L. Goldstone, J. Sherman, D. M. Admiraal, J. Turk Et Al.
Manyclasses 1: Assessing The Generalizable Effect Of Immediate Feedback Versus Delayed Feedback Across Many College Classes, E.R. Fyfe, J. R. De Leeuw, P. F. Carvalho, R. L. Goldstone, J. Sherman, D. M. Admiraal, J. Turk Et Al.
School of Natural Resources: Faculty Publications
No abstract provided.
Towards Routine Mapping Of Crop Emergence Within The Growing Season Using The Harmonized Landsat And Sentinel-2 Dataset, F. Gao, M. Anderson, D. Johnson, R. Seffren, B. Wardlow, A. Suyker, C. Diao, D. M. Browning
Towards Routine Mapping Of Crop Emergence Within The Growing Season Using The Harmonized Landsat And Sentinel-2 Dataset, F. Gao, M. Anderson, D. Johnson, R. Seffren, B. Wardlow, A. Suyker, C. Diao, D. M. Browning
School of Natural Resources: Faculty Publications
No abstract provided.
Tag Type And Location-Dependent Retention Impart Varied Levels Of Bias On Mark–Recapture Parameter Estimates, Douglas L. Zentner, Jonathan J. Spurgeon, Steve E. Lochmann, Christy L. Graham
Tag Type And Location-Dependent Retention Impart Varied Levels Of Bias On Mark–Recapture Parameter Estimates, Douglas L. Zentner, Jonathan J. Spurgeon, Steve E. Lochmann, Christy L. Graham
School of Natural Resources: Faculty Publications
Population parameter estimates from mark–recapture studies are dependent on individuals retaining marks or tags. Therefore, tag retention estimates are needed for different tag types and anatomical tagging locations. Few studies have empirically quantified the bias from tag retention on fish population parameters that are derived from mark–recapture studies. We examined differences in retention between T-bar anchor tags and PIT tags as well as among four anatomical locations for PIT tags in Brown Trout Salmo trutta in a tailwater fishery in Arkansas, USA. We also estimated the relative bias of tag type and PIT tag location on apparent survival estimates from …
Sarcocystis Neurona Transmission From Opossums To Marine Mammals In The Pacific Northwest, A. M. O'Byrne, D. M. Lambourn, D. Rejmanek, K. Haman, E. Vanwormer, K. Shapiro
Sarcocystis Neurona Transmission From Opossums To Marine Mammals In The Pacific Northwest, A. M. O'Byrne, D. M. Lambourn, D. Rejmanek, K. Haman, E. Vanwormer, K. Shapiro
School of Natural Resources: Faculty Publications
No abstract provided.
Aquatic Habitat Changes Within The Channelized And Impounded Arkansas River, Arkansas, Usa, Jonathan J. Spurgeon, Mike Rhodes, J. Wesley Neal, Kristine O. Evans
Aquatic Habitat Changes Within The Channelized And Impounded Arkansas River, Arkansas, Usa, Jonathan J. Spurgeon, Mike Rhodes, J. Wesley Neal, Kristine O. Evans
School of Natural Resources: Faculty Publications
River-wide changes in morphologic character following channelization and impoundment alter the occurrence and distribution of surface water and available habitats for aquatic organisms. Quantifying patterns of creation, redistribution or disappearance of habitats at river-wide and decadal spatiotemporal scales can promote understanding regarding trajectories of different habitat types following alteration and prospects of direct habitat enhancement projects within altered alluvial rivers. Newly available remote-sensing tools and databases may improve detection of river-wide changes in habitat through time. We used a combination of remote-sensing data and generalized linear models to assess changes in surface water coverage from 1984 to 2015 among aquatic …
Influence Of Tundra Polygon Type And Climate Variability On Co2 And Ch4 Fluxes Near Utqiagvik, Alaska, Sigrid Dengel, David Billesbach, Margaret S. Torn
Influence Of Tundra Polygon Type And Climate Variability On Co2 And Ch4 Fluxes Near Utqiagvik, Alaska, Sigrid Dengel, David Billesbach, Margaret S. Torn
School of Natural Resources: Faculty Publications
Arctic tundra has the potential to generate significant climate feedbacks, but spatial complexity makes it difficult to quantify the impacts of climate on ecosystem-atmosphere fluxes, particularly in polygonal tundra comprising wetter and drier polygon types on the scale of tens of meters. We measured CO2, CH4, and energy fluxes using eddy covariance for 7 yr (April to November, 2013–2019) in polygonal tundra near Utqiagvik, Alaska. This period saw the earliest snowmelt, latest snow accumulation, and hottest summer on record. To estimate fluxes by polygon type, we combined a polygon classification with a flux-footprint model. Methane fluxes …
Gas Exchange Measurements In The Unsteady State, Aaron J. Saathoff, Jonathan Mark Welles
Gas Exchange Measurements In The Unsteady State, Aaron J. Saathoff, Jonathan Mark Welles
School of Natural Resources: Faculty Publications
Leaf level gas exchange is a widely used technique that provides real-time measurement of leaf physiological properties, including CO2 assimilation (A), stomatal conductance to water vapour (gsw) and intercellular CO2 (Ci). Modern open-path gas exchange systems offer greater portability than the laboratory-built systems of the past and take advantage of high-precision infrared gas analyzers and optimized system design. However, the basic measurement paradigm has long required steadystate conditions for accurate measurement. For CO2 response curves, this requirement has meant that each point on the curve needs 1–3 min and a full response curve …
Critical Decision Dates For Drought Management In Central And Northern Great Plains Rangelands, A. J. Smart, K. Hamoney, J. D. Scasta, M. Stephenson, J. Volesky, L. T. Vermeire, J. C. Mosley, K. Sedivec, M. Meehan, T. Haigh Et Al.
Critical Decision Dates For Drought Management In Central And Northern Great Plains Rangelands, A. J. Smart, K. Hamoney, J. D. Scasta, M. Stephenson, J. Volesky, L. T. Vermeire, J. C. Mosley, K. Sedivec, M. Meehan, T. Haigh Et Al.
School of Natural Resources: Faculty Publications
No abstract provided.
On The Thermodynamic Foundations Of The Complementary Relationship Of Evaporation, J. Szilagyi
On The Thermodynamic Foundations Of The Complementary Relationship Of Evaporation, J. Szilagyi
School of Natural Resources: Faculty Publications
No abstract provided.
Potential Caveats In Land Surface Model Evaluations Using The U.S. Drought Monitor: Roles Of Base Periods And Drought Indicators, H. Wang, L. Xu, M. Hughes, M. Chelliah, D. G. Dewitt, B. A. Fuchs, D. L. Jackson
Potential Caveats In Land Surface Model Evaluations Using The U.S. Drought Monitor: Roles Of Base Periods And Drought Indicators, H. Wang, L. Xu, M. Hughes, M. Chelliah, D. G. Dewitt, B. A. Fuchs, D. L. Jackson
School of Natural Resources: Faculty Publications
No abstract provided.
Developing Persulfate-Activator Soft Solid (Pass) As Slow Release Oxidant To Remediate Phenol-Contaminated Groundwater, Maneekarn Yoo-Iam, Tunlawit Satapanajaru, Chanat Chokejaroenrat, Chainarong Sakulthaew, Steve Comfort, Ann Kambhu
Developing Persulfate-Activator Soft Solid (Pass) As Slow Release Oxidant To Remediate Phenol-Contaminated Groundwater, Maneekarn Yoo-Iam, Tunlawit Satapanajaru, Chanat Chokejaroenrat, Chainarong Sakulthaew, Steve Comfort, Ann Kambhu
School of Natural Resources: Faculty Publications
The research objective was to develop a persulfate-activator soft solid (PASS) as a biodegradable slow-release oxidant to treat phenol-contaminated groundwater. PASS was prepared by graft copolymerization of acrylic acid (AA) and acrylamide (AM) onto 1% (w/v) sodium alginate mixed with 500 mg L−1 sodium persulfate and 5 mg L−1 ferrous sulfate. The physical and chemical properties of PASS were characterized using scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, the water content and swelling ratio. Various variables, including the ratio of AA/AM, pH, temperature and the type of groundwater cations affecting PS release, were …
Effects Of Drought On Groundwater-Fed Lake Areas In The Nebraska Sand Hills, N. Shrestha, A. R. Mittelstet, T. E. Gilmore, V. Zlotnik, C. Neale
Effects Of Drought On Groundwater-Fed Lake Areas In The Nebraska Sand Hills, N. Shrestha, A. R. Mittelstet, T. E. Gilmore, V. Zlotnik, C. Neale
School of Natural Resources: Faculty Publications
No abstract provided.
Implications Of Historical And Contemporary Processes On Genetic Differentiation Of A Declining Boreal Songbird: The Rusty Blackbird, R. E. Wilson, S. M. Matsuoka, L. L. Powell, J. A. Johnson, D. W. Demarest, D. Stralberg, S. Sonsthagen
Implications Of Historical And Contemporary Processes On Genetic Differentiation Of A Declining Boreal Songbird: The Rusty Blackbird, R. E. Wilson, S. M. Matsuoka, L. L. Powell, J. A. Johnson, D. W. Demarest, D. Stralberg, S. Sonsthagen
School of Natural Resources: Faculty Publications
No abstract provided.
Reconstruction Of Ancient Microbial Genomes From The Human Gut, M. C. Wibowo, Z. Yang, M. Borry, A. Hubner, K. D. Huang, B. T. Tierney, S. Zimmerman, F. Barajas-Olmos, C. Contreras-Cubas, H. Garcia-Ortiz, A. Martinez-Hernandez, J. M. Luber, K. Reinhard Et Al.
Reconstruction Of Ancient Microbial Genomes From The Human Gut, M. C. Wibowo, Z. Yang, M. Borry, A. Hubner, K. D. Huang, B. T. Tierney, S. Zimmerman, F. Barajas-Olmos, C. Contreras-Cubas, H. Garcia-Ortiz, A. Martinez-Hernandez, J. M. Luber, K. Reinhard Et Al.
School of Natural Resources: Faculty Publications
No abstract provided.
The Great Plains Irrigation Experiment (Grainex), Eric Rappin, Rezaul Mahmood, Udaysankar S. Nair, Roger A. Pielke Sr., William Brown, Steven Oncley, Joshua Wurman, Karen Kosiba, Aaron Kaulfus, Chris Phillips, Emilee Lachenmeier, Joseph A. Santanello Jr., Edward Kim, Patricia Lawston-Parker
The Great Plains Irrigation Experiment (Grainex), Eric Rappin, Rezaul Mahmood, Udaysankar S. Nair, Roger A. Pielke Sr., William Brown, Steven Oncley, Joshua Wurman, Karen Kosiba, Aaron Kaulfus, Chris Phillips, Emilee Lachenmeier, Joseph A. Santanello Jr., Edward Kim, Patricia Lawston-Parker
School of Natural Resources: Faculty Publications
Extensive expansion in irrigated agriculture has taken place over the last half century. Due to increased irrigation and resultant land use land cover change, the central United States has seen a decrease in temperature and changes in precipitation during the second half of 20th century. To investigate the impacts of widespread commencement of irrigation at the beginning of the growing season and continued irrigation throughout the summer on local and regional weather, the Great Plains Irrigation Experiment (GRAINEX) was conducted in the spring and summer of 2018 in southeastern Nebraska. GRAINEX consisted of two, 15-day intensive observation periods. Observational platforms …
Challenges Of Brush Management Treatment Effectiveness In Southern Great Plains, United States, Rheinhardt Scholtz, Samuel D. Fuhlendorf, Daniel R. Uden, Brady W. Allred, Matthew O. Jones, David E. Naugle, Dirac Twidwell
Challenges Of Brush Management Treatment Effectiveness In Southern Great Plains, United States, Rheinhardt Scholtz, Samuel D. Fuhlendorf, Daniel R. Uden, Brady W. Allred, Matthew O. Jones, David E. Naugle, Dirac Twidwell
School of Natural Resources: Faculty Publications
Woodland expansion is a global challenge documented under varying degrees of disturbance, climate, and land ownership patterns. In North American rangelands, mechanical and chemical brush management practices and prescribed fire are frequently promoted by agencies and used by private landowners to reduce woody plant cover. We assess the distribution of agency-supported cost sharing of brush management (2000−2017) in the southern Great Plains, United States, and evaluate the longevity of treatment application. We test the general expectation that the current brush management paradigm in the southern Great Plains reduces woody plants and conserves rangeland resources at broad scales. This study represents …
The Nebraska Water Leaders Academy Graduates’ Influence On Community Capitals And Community Capacity, Dakota W. Staggs, Mark E. Burbach, Gina S. Matkin, Cheryl Burkhart-Kriesel
The Nebraska Water Leaders Academy Graduates’ Influence On Community Capitals And Community Capacity, Dakota W. Staggs, Mark E. Burbach, Gina S. Matkin, Cheryl Burkhart-Kriesel
School of Natural Resources: Faculty Publications
An overarching goal of the Nebraska Water Leaders Academy is to prepare a diverse group of Nebraskans from across the state to impact change in their communities by working together to solve wicked water problems. With 136 graduates from across Nebraska there is potential for graduates to effect change and impact their communities’ capitals (i.e., Built, Financial, Political, Social, Human, Cultural, and Natural). This study explored the impact of Academy graduates on their communities’ capitals and community capacity to prepare for future challenges from the perspective of graduates and community members. Findings show that Academy graduates are impacting their communities …
Decline Of Novel Ecosystems Used By Endangered Species: The Case Of Piping Plovers, Least Terns, And Aggregate Mines, Joel G. Jorgensen, Stephen J. Brenner, Lauren R. Greenwalt, Mark P. Vrtiska
Decline Of Novel Ecosystems Used By Endangered Species: The Case Of Piping Plovers, Least Terns, And Aggregate Mines, Joel G. Jorgensen, Stephen J. Brenner, Lauren R. Greenwalt, Mark P. Vrtiska
School of Natural Resources: Faculty Publications
Sand and gravel mining creates novel ecosystems along the Platte, Loup, and Elkhorn rivers in Nebraska, USA. Piping plovers and least terns are state and/or federally threatened and endangered species, respectively, that nest and raise young at these sites and their derivatives. Despite hosting relatively large numbers of piping plovers and least terns for decades, an important question that has largely gone unaddressed is whether the industry that has produced these novel ecosystems is stable and will continue to produce habitat consistently in the future. We evaluated how the number, size, and spatial distribution of different site types hosting different …