Earth Sciences Commons^™

Diversity And Dynamics Of Soil Mesofauna Associated With Natural Grasslands In Central India, Sharmila Roy, Ruquaeya Bano

IGC Proceedings (1977-2023)

No abstract provided.

Pasture Management For Conservation Of Multipurpose Plants In Italian Mountains, Andrea Pardini, V. Pratesi, R. Tallarico

IGC Proceedings (1977-2023)

No abstract provided.

Participatory Identification Of Factors Inhibiting Integrated Management Of Livestock And Wildlife Production On Kenyan Rangelands, E. N. Muthiani, S. K. Karimi

IGC Proceedings (1977-2023)

No abstract provided.

Biomass Production On Farms In The Eastern United States, Thomas C. Keene, S. Ray Smith, Michael D. Montross

IGC Proceedings (1977-2023)

No abstract provided.

Endophytic Beauveria Bassiana Increases Galling Of ‘Rutgers’ Tomato Roots With Meloidogyne Incognita, Shalini Yerukala, Ernest C. Bernard, Kimberly D. Gwinn, David M. Butler, Parwinder Grewal, Bonnie H. Ownley

School of Earth, Environmental, & Marine Sciences Faculty Publications

Beauveria bassiana is endophytic in many plant species and has been shown to protect host plants against insect pests and plant pathogens. However, less is known about its activity against plant-parasitic nematodes. In vitro and plant assays were conducted to determine the effect of B. bassiana 11-98 (Bb) on Meloidogyne incognita (root-knot nematode; RKN). Beauveria bassiana was confirmed as an endophyte in ‘Rutgers’ tomato and colonization patterns of Bb in ‘Rutgers’ (highly susceptible to RKN) were compared with those in ‘Mountain Spring’ (less susceptible to RKN). In greenhouse tests with ‘Rutgers’ at 30 and 60 days after treatment (DAT) with …

Collaborative Research: Deciphering The Role Of Extreme Rainstorms And Hydroclimatic Regime On Arid Escarpment Retreat And Sub-Cliff Slope Evolution, Joel Pederson

Funded Research Records

No abstract provided.

Students And Farmers Planning And Implementing Grass Based Agroecologic Dairy Systems As A Regular Statewide Program: The Development Of Participative Methodology Responsible For 622 Family Farm Projects, W. Murphy, A. Schmitt, F. Busnardo, J. Ross, L. Assing, A. Nacimento

IGC Proceedings (1977-2023)

No abstract provided.

Protecting Wildlife Habitat On Ranchettes, L. J. Kennedy, Ken Strom, Jacelyn Downey, Alison Lyon‐Holloran, Robert Petty

IGC Proceedings (1977-2023)

No abstract provided.

Strategies For Sustaining Multiple Ecosystem Services From Rangelands, Kris M. Havstad, J. R. Brown, J. E. Herrick, D. P. C. Peters, E. L. Fredrickson, Brandon T. Bestelmeyer, R. Pieper

IGC Proceedings (1977-2023)

No abstract provided.

Groundwater Quality And Age Of Secondary Bedrock Aquifers In The Glaciated Portion Of Eastern Nebraska, 2016–18, Christopher M. Hobza, Amanda T. Flynn

United States Geological Survey: Water Reports and Publications

The Eastern Nebraska Water Resources Assessment (ENWRA) project was initiated in 2006 to assist water managers by developing a hydrogeologic framework and water budget for the glaciated portion of eastern Nebraska. Within the ENWRA area, the primary groundwater sources for municipal, domestic, and irrigation water needs are provided by withdrawals from alluvial, buried paleovalley, and the High Plains aquifer (where present). Generally, other bedrock aquifers are considered a secondary water source. However, in some areas, such as parts of Sarpy and Nemaha Counties, these secondary bedrock aquifers are the only source of water within glaciated upland areas. To improve the …

Classroom To Paddock: Delivery Of Grazing Land Management Education In The Northern Territory, Australia, Ellena Hannah

IGC Proceedings (1977-2023)

No abstract provided.

The Agdal System Or The Art Of Managing Spatio‐Temporality Of Forage Resources And Risks In The High Atlas Mountains Of Morocco, Didier Genin

IGC Proceedings (1977-2023)

No abstract provided.

Kikuyu (Cenchrus Clandestinus) For Dryland Salinity Management, Department Of Primary Industries And Regional Development, Western Australia

Natural resources factsheets

Kikuyu (Cenchrus clandestinus) is a subtropical, perennial C4 grass that is widely used as a pasture and turf.

It has some salinity tolerance, and moderate waterlogging tolerance. Kikuyu is commonly established from seed and can also be grown from vegetative plantings, unlike marine couch, saltwater couch and Distichlis (vegetative only).

We recommend that any dryland salinity management is part of a whole farm, and preferably a whole catchment, water management plan.

Findings Report: Virtual Workshop On ‘Resilient Supply Of Critical Minerals’, Marek Locmelis, Angela D. Lueking, Michael S. Moats, Kwame Awuah-Offei, Lana Z. Alagha, Mark W. Fitch, Alanna Krolikowski, Shelby Clark

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Executive Summary
On August 2-3, 2021, the Thomas J. O’Keefe Institute for Sustainable Supply of Strategic Minerals at Missouri University of Science and Technology (Missouri S&T) hosted the NSF-funded virtual workshop ‘Resilient Supply of Critical Minerals’. The workshop was convened via Zoom and attracted 158 registrants, including 108 registrants from academia (61 students), 30 registrants from government agencies, and 20 registrants from the private sector. Four topical sessions were covered:

A. Mineral Exploration and Source Diversification.
B. Supply Chain and Policy Issues.
C. Improving Mineral Recycling and Reprocessing Technologies.
D. Technological Alternatives to Critical Minerals.

Each topical session was composed …

Impact Of Wastes On Some Properties Of Soil Around An Active Dumpsite In Ibadan, Southwestern Nigeria, Oluwatoyin Opeyemi Akintola, Gabriel Oladapo Adeyemi, Oluwayemisi Samuel Olokeogun, Idayat Adewunmi Bodede

Journal of Bioresource Management

Recently most farmers in developing country like Nigeria has resulted to the use of solid wastes as compost to replenish the deteriorated soils while some are farming on the abandoned waste dumpsite due to their richness in organic matter. This study assessed the soil nutrient and fertility status by investigating the influence of wastes (if any) on physical and chemical properties of soils in and around Lapite dumpsite for environmental sustainability. Ten soil samples each collected from three locations: dumpsite, downslope and upslope sites at depth of 0-20cm were analyzed for soil texture, bulk density, porosity, electrical conductivity, pH, organic …

Australian Sheep Farmers Are Increasing Pasture Utilisation And Reducing Risk With Easy‐To‐Use Tools From Lifetimewool, M. Curnow, J. Whale, D. Gordon

IGC Proceedings (1977-2023)

No abstract provided.

Are Drought‐Related Crashes In Pastoral Cattle Herds Predictable? — More Evidence Of Equilibrium Dynamics From The Douthern Ethiopian Rangelands, D. Layne Coppock, G. Gebru, S. Mesele, S. Desta

IGC Proceedings (1977-2023)

No abstract provided.

An Evolving Model For A Livestock And Fodder Development Project Involving The Poverty Stricken Communities Of The Eastern Cape Province, South Africa, P. W. Conradie, D. Swart, B. King, M. Macanda, U. Gulwa, G. Jordaan

IGC Proceedings (1977-2023)

No abstract provided.

Why Farmers Don't Always Practice 'Optimum' Management: Case Study Of Small Stock Ranching Systems In Southern Namibia, Stephanie E. Domptail, Alexander Popp, Ernst‐August Nuppenau

IGC Proceedings (1977-2023)

No abstract provided.

Assessing The Contribution Of Mixed Farming Systems To Biodiversity Across Australia's Sheep‐Wheat Zone: The Grain & Graze Participatory Research Model, Kerry L. Bridle, Peter Mcquillan, Dave Green, Janet Smith, Margy Fitzgerald, Ted Lefroy

IGC Proceedings (1977-2023)

No abstract provided.

Ensemble Data Fitting For Bathymetric Models Informed By Nominal Data, Samantha Zambo

Dissertations

Due to the difficulty and expense of collecting bathymetric data, modeling is the primary tool to produce detailed maps of the ocean floor. Current modeling practices typically utilize only one interpolator; the industry standard is splines-in-tension.

In this dissertation we introduce a new nominal-informed ensemble interpolator designed to improve modeling accuracy in regions of sparse data. The method is guided by a priori domain knowledge provided by artificially intelligent classifiers. We recast such geomorphological classifications, such as ‘seamount’ or ‘ridge’, as nominal data which we utilize as foundational shapes in an expanded ordinary least squares regression-based algorithm. To our knowledge …

Fragmentation Theory Reveals Processes Controlling Iceberg Size Distributions, Jan Åström, Sue Cook, Ellyn M. Enderlin, David A. Sutherland, Aleksandra Mazur, Neil Glasser

Geosciences Faculty Publications and Presentations

Iceberg calving strongly controls glacier mass loss, but the fracture processes leading to iceberg formation are poorly understood due to the stochastic nature of calving. The size distributions of icebergs produced during the calving process can yield information on the processes driving calving and also affect the timing, magnitude, and spatial distribution of ocean fresh water fluxes near glaciers and ice sheets. In this study, we apply fragmentation theory to describe key calving behaviours, based on observational and modelling data from Greenland and Antarctica. In both regions, iceberg calving is dominated by elastic-brittle fracture processes, where distributions contain both exponential …

Timescales Of Impact Melt Sheet Crystallization And The Precise Age Of The Morokweng Impact Structure, South Africa, Gavin G. Kenny, Claire O. Harrigan, Mark D. Schmitz, James L. Crowley, Corey J. Wall

Geosciences Faculty Publications and Presentations

Impact cratering was a fundamental geological process in the early Solar System and, thus, constraining the timescales over which large impact structures cool is critical to understanding the thermal evolution and habitability of early planetary crusts. Additionally, impacts can induce mass extinctions and establishing the precise timing of the largest impacts on Earth can shed light on their role in such events. Here we report a high-precision zircon U–Pb geochronology study of the Morokweng impact structure, South Africa, which appears to have a maximum present-day diameter of ∼80 km. Our work provides (i) constraints on the cooling of large impact …

Multi-Modal Data Fusion, Image Segmentation, And Object Identification Using Unsupervised Machine Learning: Conception, Validation, Applications, And A Basis For Multi-Modal Object Detection And Tracking, Nicholas Lahaye

Computational and Data Sciences (PhD) Dissertations

Remote sensing and instrumentation is constantly improving and increasing in capability. Included within this, is the increase in amount of different instrument types, with various combinations of spatial and spectral resolutions, pointing angles, and various other instrument-specific qualities. While the increase in instruments, and therefore datasets, is a boon for those aiming to study the complexities of the various Earth systems, it can also present a large number of new challenges. With this information in mind, our group has set our aims on combining datasets with different spatial and spectral resolutions in an effective and as-general-as-possible way, with as little …

College Of Natural Sciences Newsletter, August 2021, College Of Natural Sciences

College of Natural Sciences Newsletters and Reports

Volume 2, Issue 8.

Page 1 Dean's Message
Page 2 Awards and Recognition
Page 3 Student Summer Research
Page 4 Media Coverage of CNS
Page 5 Wintrode Student Success Center
Page 6-7 Welcome to our new Faculty & Staff!
Page 8 One Day for State: Thursday, Sept. 2nd
Page 7 Open PRAIRIE Data; Fall Faculty Retreat 2021

Spatiotemporal Trends And Variability In The Centroid Of The Northern Hemisphere's Circumpolar Vortex, Nazla Bushra, Robert V. Rohli

Faculty Publications

Recent previous research has established the "sharpest gradient" approach to defining the circumpolar vortex and has identified correlations of the area and circularity of the Northern Hemisphere's circumpolar vortex (NHCPV) to important atmospheric-oceanic teleconnections. However, because geographical shifts in the NHCPV, independent of area or circularity changes, could affect surface environmental conditions, this research addresses the question of the extent to which the NHCPV centroid undergoes such shifts, both intra- and inter-annually. Results show that during the 1979-2017 period, the centroid has moved less on a daily basis in more recent years, perhaps indicative of a stabilization in circulation, with …

Diatoms Of The Intertidal Environments Of Willapa Bay, Washington, Usa As A Sea-Level Indicator, Isabel Hong, Benjamin P. Horton, Andrea D. Hawkes, Robert J. O.Donnell Iii, Jason S. Padgett, Tina Dura, Simon E. Engelhart

Geological Sciences Faculty Scholarship

An understanding of the modern relationship between diatom species and elevation is a prerequisite for using fossil diatoms to reconstruct relative sea level (RSL). We described modern diatom distributions from seven transects covering unvegetated subtidal environments to forested uplands from four tidal wetland sites (Smith Creek, Bone River, Niawiakum River, and Naselle River) of Willapa Bay, Washington, USA. We compared our diatom dataset (320 species from 104 samples) to a series of environmental variables (elevation, grain-size, total organic carbon (TOC_SOM), and porewater salinity) using hierarchical clustering and ordination. While no single variable consistently explains variations in diatom assemblages …

Case 3847 – Simopithecus Oswaldi Andrews, 1916 (Currently Theropithecus Oswaldi; Mammalia, Primates, Cercopithecidae), Proposed Conservation By Reversal Of Precedence With Cynocephalus Atlanticus Thomas, 1884., Eric Delson, David M. Alba, Stephen R. Frost, Dagmawit Abebe Getahun, Christopher C. Gilbert

Publications and Research

The purpose of this application, under Articles 23.9.3 and 81.1 of the Code, is to conserve the usage of the species-group name Simopithecus oswaldi Andrews, 1916 by giving it precedence over its senior subjective synonym Cynocephalus atlanticus Thomas, 1884. Theropithecus is a common to dominant member of the extinct primate community across Africa after 4 million years ago (Jablonski & Frost, 2010) and often co-occurred with extinct humans (Hominini); fossils are also known rarely across Eurasia (Roberts et al., 2014). Most fossil samples are currently included in Theropithecus oswaldi (Andrews, 1916), which is often divided into chrono-geographic subspecies. Cynocephalus atlanticus …

Unoccupied Aircraft Systems (Uass) Reveal The Morphological Changes At Stromboli Volcano (Italy) Before, Between, And After The 3 July And 28 August 2019 Paroxysmal Eruptions, Jeffrey B. Johnson

Geosciences Faculty Publications and Presentations

In July and August 2019, two paroxysmal eruptions dramatically changed the morphology of the crater terrace that hosts the active vents of Stromboli volcano (Italy). Here, we document these morphological changes, by using 2259 UAS-derived photographs from eight surveys and Structure-from-Motion (SfM) photogrammetric techniques, resulting in 3D point clouds, orthomosaics, and digital surface models (DSMs) with resolution ranging from 8.1 to 12.4 cm/pixel. We focus on the morphological evolution of volcanic features and volume changes in the crater terrace and the upper part of the underlying slope (Sciara del Fuoco). We identify both crater terrace and lava field variations, with …

Pervasive Changes In Stream Intermittency Across The United States, Kendra E. Kaiser

Geosciences Faculty Publications and Presentations

Non-perennial streams are widespread, critical to ecosystems and society, and the subject of ongoing policy debate. Prior large-scale research on stream intermittency has been based on long-term averages, generally using annually aggregated data to characterize a highly variable process. As a result, it is not well understood if, how, or why the hydrology of non-perennial streams is changing. Here, we investigate trends and drivers of three intermittency signatures that describe the duration, timing, and dry-down period of stream intermittency across the continental United States (CONUS). Half of gages exhibited a significant trend through time in at least one of the …