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A Methodology For Flash Drought Identification: Application Of Flash Drought Frequency Across The United Statesjordan, Jordan I. Christian, Jeffrey B. Basara, Jason A. Otkin, Eric D. Hunt, Ryann A. Wakefield, Paul Flanagan, Xiangming Xiao

School of Natural Resources: Faculty Publications

With the increasing use of the term ‘‘flash drought’’ within the scientific community, Otkin et al. provide a general definition that identifies flash droughts based on their unusually rapid rate of intensi- fication. This study presents an objective percentile-based methodology that builds upon that work by identifying flash droughts using standardized evaporative stress ratio (SESR) values and changes in SESR over some period of time. Four criteria are specified to identify flash droughts: two that emphasize the vegetative impacts of flash drought and two that focus on the rapid rate of intensification. The method- ology was applied to the North …

A Methodology For Flash Drought Identification: Application Of Flash Drought Frequency Across The United States, Jordan I. Christian, Jeffery B. Basara, Jason A. Otkin, Eric D. Hunt, Ryann A. Wakefield, Paul X. Flanagan, Xiangming Xiao

School of Natural Resources: Faculty Publications

With the increasing use of the term ‘‘flash drought’’ within the scientific community, Otkin et al. provide a general definition that identifies flash droughts based on their unusually rapid rate of intensification. This study presents an objective percentile-based methodology that builds upon that work by identifying flash droughts using standardized evaporative stress ratio (SESR) values and changes in SESR over some period of time. Four criteria are specified to identify flash droughts: two that emphasize the vegetative impacts of flash drought and two that focus on the rapid rate of intensification. The methodology was applied to the North American Regional …

Variation In White-Tailed Deer Antler Size: The Effects Of Age, Landscape Composition, And Physiographic Province, Kathleen B. Quebedeaux, Andrew R. Little, Nathan P. Nibbelink, Gino J. D'Angelo, Charlie H. Killmaster, Karl V. Miller

School of Natural Resources: Faculty Publications

Spatial variation in landscape composition can influence phenotypic expression in wildlife species and can improve management efforts to express certain phenotypic traits. We evaluated the influence of age, landscape composition, and physiographic province on white-tailed deer (Odocoileus virginianus) antler characteristics using data from 16,622 male deer (age range: 1.5–3.5+ years old) harvested between 1997–2016 across five physiographic provinces in Georgia. Age and physiographic province influenced antler size index (ASI; P < 0.001). ASI of yearling males was greatest (- x = 53.37; SE = 0.39) in the Upper Coastal Plain and least (- x = 46.23; SE = 0.51) in the Lower Coastal Plain physiographic province. Given the differences in ASI among physiographic provinces, we evaluated how landscape composition within each physiographic province influenced ASI of 7,325 yearling (1.5-year-old) males. Yearling ASI was positively related to increasing coverage of cultivated crops and suburban-urban areas (e.g., parks, small housing developments). Conversely, evergreen and deciduous forested cover consistently had a negative effect on ASI, except in the Ridge and Valley physiographic province where evergreen was positively related to ASI. Wildlife managers and hunters should recognize the effects of age, landscape composition, and physiographic province when setting antler size expectations.

Variation In White-Tailed Deer Antler Size: The Effects Of Age, Landscape Composition, And Physiographic Province., K. B. Quebedeaux, Andrew R. Little, N. P. Nibbelink, G. J. D'Angelo, C. H. Killmaster, K. V. Miller

School of Natural Resources: Faculty Publications

Spatial variation in landscape composition can influence phenotypic expression in wildlife species and can improve management efforts to express certain phenotypic traits. We evaluated the influence of age, landscape composition, and physiographic province on white-tailed deer (Odocoileus virginianus) antler characteristics using data from 16,622 male deer (age range: 1.5–3.5+ years old) harvested between 1997–2016 across five physiographic provinces in Georgia. Age and physiographic province influenced antler size index (ASI; P < 0.001). ASI of yearling males was greatest (- x = 53.37; SE = 0.39) in the Upper Coastal Plain and least (- x = 46.23; SE = 0.51) in the Lower Coastal Plain physiographic province. Given the differences in ASI among physiographic provinces, we evaluated how landscape composition within each physiographic province influenced ASI of 7,325 yearling (1.5-year-old) males. Yearling ASI was positively related to increasing coverage of cultivated crops and suburban-urban areas (e.g., parks, small housing developments). Conversely, evergreen and deciduous forested cover consistently had a negative effect on ASI, except in the Ridge and Valley physiographic province where evergreen was positively related to ASI. Wildlife managers and hunters should recognize the effects of age, landscape composition, and physiographic province when setting antler size expectations.

Tree-Ring Stable Isotopes Show Different Ecophysiological Strategies In Native And Invasive Woody Species Of A Semi-Arid Riparian Ecosystem In The Great Plains Of The United States, Tala Awada, Kristen Skolaut, Giovanna Battipaglia, Matthias Saurer, Diego A. Riveros-Iregui, Adam Schapaugh, Julie Huddle, Xinhua Zhou, Derrell Martin, Paolo Cherubini

School of Natural Resources: Faculty Publications

No abstract provided.

Nu-Spidercam: A Large-Scale, Cable-Driven, Integrated Sensing And Robotic System For Advanced Phenotyping, Remote Sensing, And Agronomic Research, Geng Bai, Yufeng Ge, David Scoby, Bryan Leavitt, Vincent Stoerger, Norbert Kirchgessner, Suat Irkmak, George Graef, James Schnable, Tala Awada

School of Natural Resources: Faculty Publications

No abstract provided.

Leveraging Image Analysis For High-Throughput Plant Phenotyping, Sruti Das Choudhury, Ashok Samal, Tala Awada

School of Natural Resources: Faculty Publications

No abstract provided.

Empirical Methods For Remote Sensing Of Nitrogen In Drylands May Lead To Unreliable Interpretation Of Ecosystem Function, Hamid Dashti, Nancy F. Glenn, Susan Ustin, Jessica J. Mitchell, Yi Qi, Nayani T. Ilangakoon, Alejandro N. Flores, Jose Luis Silvan-Cardenas, Kaiguang Zhao, Lucas P. Spaete, Marie-Anne De Graaff

School of Natural Resources: Faculty Publications

No abstract provided.

The Adaptive Cycle: More Than A Metaphor, Shana M. Sundstrom, Craig R. Allen

School of Natural Resources: Faculty Publications

The adaptive cycle and its extension to panarchy (nested adaptive cycles) has been a useful metaphor and conceptual model for understanding long-term dynamics of change in ecological and social–ecological systems. We argue that adaptive cycles are ubiquitous in complex adaptive systems because they reflect endogenously generated dynamics as a result of processes of self-organization and evolution. We synthesize work from a wide array of fields to support this claim. If dynamics of growth, conservation, collapse and renewal are endogenous dynamics of complex adaptive systems, then there ought to be signals of system change over time that reflect this. We describe …

Effectiveness Of Plant Species For Removing Atmospheric Ammonia, Marife B. Anunciado, Sheryll B. Jerez, Hans Williams, Joey Bray, Dean W. Coble, Rena Saito

Faculty Publications

Six plant species of Yaupon, Eastern red cedar, American holly, Arizona cypress, Arborvitae and Roughleaf dogwood were utilized to determine their effectiveness in the removal of atmospheric ammonia. All species were exposed to three ammonia levels (1, 5 and 10 ppm) in an environmental chamber. Foliar ammonia content was quantified using an enzymatic technique. The effects of exposure to ammonia on the physiological responses (e.g. photosynthetic activity, stomatal conductance, and transpiration rate) of plants in ambient condition were also determined using an open design photosynthetic gas exchange system. Foliar ammonia content was significantly different among the six plant species (p<0.0001) with Eastern red cedar exhibiting the highest content. The physiological responses differed significantly depending on the plant species and the ammonia treatment level. The photosynthetic response of plants to the presence of ammonia was mixed. At low exposure level, all species except Arborvitae had decreased photosynthetic activity, reducing by as much as 44.5% for Yaupon. At the highest concentration, however, Yaupon’s photosynthetic activity improved by about 10%. Exposure to ammonia caused increased stomatal conductance and transpiration rate on American holly and Arizona cypress, making them more susceptible to water loss.

Twenty-Three Unsolved Problems In Hydrology (Uph) – A Community Perspective, Günter Blöschl, Christopher M. U. Neale, A Cast Of Thousands

Daugherty Water for Food Global Institute: Faculty Publications

This paper is the outcome of a community initiative to identify major unsolved scientific problems in hydrology motivated by a need for stronger harmonisation of research efforts. The procedure involved a public consultation through online media, followed by two workshops through which a large number of potential science questions were collated, prioritised, and synthesised. In spite of the diversity of the participants (230 scientists in total), the process revealed much about community priorities and the state of our science: a preference for continuity in research questions rather than radical departures or redirections from past and current work. Questions remain focused …

Impact Of The Application Of Domestic Wastewater By Subsurface Drip Irrigation On The Soil Solution In Sugarcane Cultivation, Aline Azevedo Nazário, Ivo Zution Gonçalves, Eduardo Augusto Agnellos Barbosa, Leonardo Nazário Silva Dos Santos, Daniel Rodrigues Cavalcante Feitosa, Edson Eiji Matsura

Daugherty Water for Food Global Institute: Faculty Publications

The agricultural use of domestic sewage is a viable alternative for recycling nutrients; however, there is concern regarding the impact of its use due to the concentration of chemical elements present in this type of effluent. The use of principal component analysis determines the existence or lack of anomalous samples and the relations between measured variables and their relative contribution among samples that help in monitoring the impact of the use of effluents on soil chemical components. Thus, the objective of this work was to identify nutrient ions present in the soil solution during the first ratoon sugarcane irrigated with …

Mapping Regional Turbulent Heat Fluxes Via Assimilation Of Modis Land Surface Temperature Data Into An Ensemble Kalman Smoother Framework, Xinlei He, Tongren Xu, Sayed M. Bateni, Christopher M. U. Neale, Shaomin Liu, Thomas Auligne, Kaicun Wang, Shoudong Zhu

Daugherty Water for Food Global Institute: Faculty Publications

Estimation of turbulent heat fluxes via variational data assimilation (VDA) approaches has been the subject of several studies. The VDA approaches need an adjoint model that is difficult to derive. In this study, remotely sensed land surface temperature (LST) data from the Moderate Resolution Imaging Spectroradiometer (MODIS) are assimilated into the heat diffusion equation within an ensemble Kalman smoother (EnKS) approach to estimate turbulent heat fluxes. The EnKS approach is tested in the Heihe River Basin (HRB) in northwest China. The results show that the EnKS approach can estimate turbulent heat fluxes by assimilating low temporal resolution LST data from …

2019 Nebraska Water Productivity Report, Mesfin Mekonnen, Christopher Michael Usher Neale, Chittaranjan Ray, Galen E. Erickson, Adam Liska, Haishun Yang, Thiago L. Romanelli, Arjen Y. Hoekstra

Daugherty Water for Food Global Institute: Faculty Publications

Nebraska’s agricultural production is diverse and vast, ranking the state fourth in total value of agricultural products in the U.S. The state is a national leader in terms of agricultural production: it is the third largest producer of corn and second largest in cattle production. Nebraska is also the second largest producer of ethanol and distillers’ grains. The production and use of these three commodities are highly interlinked. Corn is a major input in livestock feed and the ethanol industry. Ethanol plants then produce distillers’ grains as a co-product that is also used as livestock feed, thus forming what the …

Oak Lake Field Station : Station Overview, Nels H. Troelstrup Jr.

Oak Lake Field Station 30th Anniversary Retreat Presentations

No abstract provided.

Fib-Sem Three-Dimensional Tomography For Characterization Of Carbon-Based Materials, Nan Nan, Jingxin Wang

Faculty & Staff Scholarship

A review on the recent advances of the three-dimensional (3D) characterization of carbon-based materials was conducted by focused ion beam-scanning electron microscope (FIB-SEM) tomography. Current studies and further potential applications of the FIB-SEM 3D tomography technique for carbon-based materials were discussed. The goal of this paper is to highlight the advances of FIB-SEM 3D reconstruction to reveal the high and accurate resolution of internal structures of carbon-based materials and provide suggestions for the adoption and improvement of the FIB-SEM tomography system for a broad carbon-based research to achieve the best examination performances and enhance the development of innovative carbon-based materials.

A Prairie And Its People: Conflict And Cooperation. E. Frank Schramm, Joseph E.A. Alexis, The Amos Eager Family, The University Of Nebraska And Other Notable Owners Of Nine Mile Prairie And Its Environs, Jon H. Oberg

University of Nebraska State Museum: Staff and Affiliates, Publications

This study looks at the social history of individuals connected to a particular geographic quadrant -- Section 1 of Middle Creek precinct, Lancaster County, Nebraska. This an area famous for its natural history, as it is the home of Nine Mile Prairie. But the property owners in this section have a colorful history that encompasses the fields of sports, politics, academics, foreign wars, and crime. The study looks primarily at E. Frank Schramm, Joseph E.A. Alexis, and the Amos Eager family, who with other owners contributed importantly to the history and development of the City of Lincoln and the State …

Long Island Horseshoe Crab Network Annual Inventory Report, Cercom, Molloy University, John Tanacredi Ph.D., Kyle F. Maurelli

CERCOM Reports

CERCOM monitors 115 beach locations from Brooklyn – Montauk during optimal Limulus Polyphemus breeding season. These beach surveys take place for approximately 15 weeks, ranging from MayAugust. These beach locations are marked specifically using GPS coordinates, to assure the same location is visited each year. Students and volunteers are required to attend a HSC Survey training orientation lead by CERCOM’s research assistant, Mr. Kyle Maurelli. Surveying is done around tide and moon cycles (New/Full Moon). Each site takes about 1-2 hours and data is recorded along an approximate 1 mile distance. Walking along the water’s edge the number of male …

The Prairie Post Quarterly Newsletter Of The High Plains Regional Climate Center- January 2019, Natalie Umphlett, Rezaul Mamood, Warren Pettee, Gannon Rush, Crystal J. Stiles

Prairie Post: Quarterly Newsletter of the High Plains Regional Climate Center

Inside this issue:

Message from the director........................................1

Staff spotlight...........................1

Year in review............................2

Drought THIRA toolkit...........3

Product highlight....................4

Update on regional climate conditions..................................4

Other HPRCC news.................5

Recent and upcoming travel and activities.............................6

Great South Bay, Long Island, New York Summer Water Quality Monitoring Program, Cercom, Molloy University, John Tanacredi Ph.D., Kyle F. Maurelli

CERCOM Reports

The Center for Environmental Research and Coastal Oceans Monitoring (CERCOM) visits 11 locations in the Great South Bay from Memorial Day – Labor Day to monitor for dissolved oxygen (DO), pH, salinity, clarity and temperature. Students are trained and assist in CERCOM’s water quality data collection by research assistant Mr. Kyle Maurelli. This monitoring program has been conducted for the past 16 years. These parameters are critical in determining long term water quality conditions in Long Island estuaries.

Oak Lake Wetland Restoration: Difference In Hydrology Between Newly Restored And Reference Wetlands, Jennifer A. Dailey, Nels H. Troelstrup Jr.

Oak Lake Field Station 30th Anniversary Retreat Presentations

No abstract provided.

Ua66/6/2 Ogden College Of Science & Engineering Biology Publications, Wku Archives

WKU Archives Collection Inventories

Publications created by and about Biology.

Ua66/6/1 Ogden College Of Science & Engineering Biology Administration, Wku Archives

WKU Archives Collection Inventories

Records created by and about the administration of the Biology Department.

Ua66/8/2 Ogden College Of Science & Engineering Geography & Geology Centers & Institutes, Wku Archives

WKU Archives Collection Inventories

Records created by and about Centers and Institutes administered by the Geography & Geology Department. Including:

• Center for Cave & Karst Studies
• Center for Local Government Services
• Hoffman Environmental Research Institute
• Kentucky Climate Center
• Resources Management Institute
• Small Public Water System Technology Center

2018 Kentucky River Watershed Watch: Annual Report, Malissa Mcalister

Kentucky River Watershed Watch

No abstract provided.

Urban Aerobiological Risk Mapping Of Ornamental Trees Using A New Index Based On Lidar And Kriging: A Case Study Of Plane Trees, Raúl Pecero-Casimiro, Santiago Fernández-Rodríguez, Rafael Tormo-Molina, Alejandro Monroy-Colín, Inmaculada Silva-Palacios, Juan Pedro Cortés-Pérez, Ángela Gonzalo-Garijo, J. M. Maya-Manzano

Articles

Ornamental trees bring benefits for human health, including reducing urban pollution. However, some species, such as plane trees (Platanus sp.), produce allergenic pollen. Consequently, urban maps are a valuable tool for allergic patients and allergists, but they often fail to include variables that contribute to the “building downwash effect”, such as the width and shape of streets and the height of buildings. Other factors that directly influence pollen dispersion (slopes and other geographical features) also have not traditionally been discussed. The LiDAR (Laser Imaging Detection and Ranging) technique enables one to consider these variables with high accuracy. This work proposes …

Teaching Styles And Student Outcomes In Undergraduate Food, Energy, And Water Systems (Fews) Courses, A. Sommers, H. White, A. Alred, J. M. Dauer, C. Forbes

School of Natural Resources: Faculty Publications

No abstract provided.

Flexible Stocking With Grass-Cast: A New Grassland Productivity Forecast To Reduce Weather Uncertainty, D. Peck, J. Derner, W. Parton, M. Hartman, B. Fuchs

School of Natural Resources: Faculty Publications

No abstract provided.

Agroforestry Strategic Framework, Fiscal Years 2019-2024, Susan Stein

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

America’s farmers, ranchers, and forest landowners are integrating trees with agriculture to address a variety of conservation and production goals. A unique land management approach, agroforestry provides opportunities to integrate productivity and profitability with environmental stewardship to support healthy, sustainable agriculture systems, economies, and communities.

Establishing Rates Of Carbon Sequestration In Mangroves From An Earthquake Uplift Event, Severino G. Salmo Iii, Vanessa Malapit, Maria Carmela A. Garcia, Homer M. Pagkalinawan

Environmental Science Faculty Publications

We assessed the carbon stocks (CS) in mangroves that developed after a magnitude 7.1 earthquake in Silonay, Oriental Mindoro, south Luzon, The Philippines in November 1994. The earthquake resulted in a 50 cm uplift of sediment that provided new habitat within the upper intertidal zone which mangroves colonized (from less than 2 ha pre-earthquake to the current 45 ha, 23 years post-earthquake). The site provided an opportunity for a novel assessment of the rate of carbon sequestration in recently established mangroves. The carbon stock was measured in above-ground, below- ground and sediment compartments over a seaward to landward transect. Results …