Digital Commons Network^™

Capturing Wheat Phenotypes At The Genome Level, Babar Hussain, Bala A. Akpınar, Michael Alaux, Ahmed M. Algharib, Deepmala Sehgal, Zulfiqar Ali, Gudbjorg I. Aradottir, Jacqueline Batley, Arnaud Bellec, Alison R. Bentley, Halise B. Cagirici, Luigi Cattivelli, Fred Choulet, James Cockram, Francesca Desiderio, Pierre Devaux, Munevver Dogramaci, Gabriel Dorado, Susanne Dreisigacker, David Edwards, Khaoula El-Hassouni, Kellye Eversole, Tzion Fahima, Melania Figueroa, Sergio Gálvez, Kulvinder S. Gill, Liubov Govta, Alvina Gul, Goetz Hensel, Pilar Hernandez, Leonardo Abdiel Crespo-Herrera, Amir Ibrahim, Benjamin Kilian

Faculty Publications

Recent technological advances in next-generation sequencing (NGS) technologies have dramatically reduced the cost of DNA sequencing, allowing species with large and complex genomes to be sequenced. Although bread wheat (Triticum aestivum L.) is one of the world’s most important food crops, efficient exploitation of molecular marker-assisted breeding approaches has lagged behind that achieved in other crop species, due to its large polyploid genome. However, an international public–private effort spanning 9 years reported over 65% draft genome of bread wheat in 2014, and finally, after more than a decade culminated in the release of a gold-standard, fully annotated reference wheat-genome assembly …

Efficiently Searching Extreme Mechanical Properties Via Boundless Objective-Free Exploration And Minimal First-Principles Calculations, Joshua Ojih, Mohammed Al-Fahdi, Alejandro David Rodriguez, Kamal Choudhary, Ming Hu

Faculty Publications

Despite the machine learning (ML) methods have been largely used recently, the predicted materials properties usually cannot exceed the range of original training data. We deployed a boundless objective-free exploration approach to combine traditional ML and density functional theory (DFT) in searching extreme material properties. This combination not only improves the efficiency for screening large-scale materials with minimal DFT inquiry, but also yields properties beyond original training range. We use Stein novelty to recommend outliers and then verify using DFT. Validated data are then added into the training dataset for next round iteration. We test the loop of training-recommendation-validation in …

The Impact Of Psychological Distress Due To Covid-19 On College Student Career Development, Sara Driver, Emily Bullock-Yowell

Faculty Publications

The COVID-19 pandemic has been an ongoing public health crisis and continues to create a variety of challenges (Centers for Disease Control and Prevention, 2020). Since the challenges of COVID-19 seem to be particularly salient for traditional college-age students (Kujawa et al., 2020) and career development is a corner stone of development at this stage, the current study investigated what impact the COVID-19 pandemic-related stress has on the psychological distress, career-development self-efficacy, and career decidedness of a sample of college students. Three hundred one students from a southeastern United States university participated in the study. We hypothesize 1) Impacts from …

Natural Products Inhibitors Of Monoamine Oxidases—Potential New Drug Leads For Neuroprotection, Neurological Disorders, And Neuroblastoma, Narayan D. Chaurasiya, Francisco León Ph.D., Ilias Muhammad, Babu L. Tekwani

Faculty Publications

Monoamine oxidase inhibitors (MAOIs) are an important class of drugs prescribed for treatment of depression and other neurological disorders. Evidence has suggested that patients with atypical depression preferentially respond to natural product MAOIs. This review presents a comprehensive survey of the natural products, predominantly from plant sources, as potential new MAOI drug leads. The psychoactive properties of several traditionally used plants and herbal formulations were attributed to their MAOI constituents. MAO inhibitory constituents may also be responsible for neuroprotective effects of natural products. Different classes of MAOIs were identified from the natural product sources with non-selective as well as selective …

Multi-Substituted Quinolines As Hiv-1 Integrase Allosteric Inhibitors, Long Phi Dinh, Jian Sun, Courtney D. Glenn, Krunal Patel, Julie A. Pigza, Matthew G. Donahue, Larry Yet, Jacques Kessl

Faculty Publications

Allosteric HIV-1 integrase (IN) inhibitors, or ALLINIs, are a new class of antiviral agents that bind at the dimer interface of the IN, away from the enzymatic catalytic site and block viral replication by triggering an aberrant multimerization of the viral enzyme. To further our understanding of the important binding features of multi-substituted quinoline-based ALLINIs, we have examined the IN multimerization and antiviral properties of substitution patterns at the 6 or 8 position. We found that the binding properties of these ALLINIs are negatively impacted by the presence of bulky substitutions at these positions. In addition, we have observed that …

A Monte Carlo Framework For Incremental Improvement Of Simulation Fidelity, Damian M. Lyons, James Finocchiaro, Misha Novitzky, Chris Korpela

Faculty Publications

Robot software developed in simulation often does not be- have as expected when deployed because the simulation does not sufficiently represent reality - this is sometimes called the `reality gap' problem. We propose a novel algorithm to address the reality gap by injecting real-world experience into the simulation. It is assumed that the robot program (control policy) is developed using simulation, but subsequently deployed on a real system, and that the program includes a performance objective monitor procedure with scalar output. The proposed approach collects simulation and real world observations and builds conditional probability functions. These are used to generate …

A Monte Carlo Framework For Incremental Improvement Of Simulation Fidelity, Damian Lyons, James Finocchiaro, Misha Novitsky, Chris Korpela

Faculty Publications

Robot software developed in simulation often does not be- have as expected when deployed because the simulation does not sufficiently represent reality - this is sometimes called the `reality gap' problem. We propose a novel algorithm to address the reality gap by injecting real-world experience into the simulation. It is assumed that the robot program (control policy) is developed using simulation, but subsequently deployed on a real system, and that the program includes a performance objective monitor procedure with scalar output. The proposed approach collects simulation and real world observations and builds conditional probability functions. These are used to generate …

Hytch Rewards: Incentivizing Sustainable Behavior, Jeff Cohu

Faculty Publications

Mark Cleveland, Co-founder and CEO of Hytch Rewards, was facing a dilemma. His technology- based startup, Hytch Rewards, was at a critical juncture in the company launch. The company

had just recorded its best quarter in company history, but the pandemic had placed the company’s future in jeopardy. Mark pulled together his team of advisors and investors and asked the question, “Should we pause, pivot, or continue to pursue the launch of the company?”

The team came back equally divided among the three options. “Some of our group said we should stop development work and place the company on hold …

A Wet/Dry Point Treatment Method Of Fvcom, Part Ii: Application To The Okatee/Colleton River In South Carolina, Changsheng Chen, Haosheng Huang, Huichan Lin, Jack Blanton, Chunyan Li, Francisco Andrade

Faculty Publications

The wet/dry point treatment method of FVCOM was applied to simulate the tide-induced flooding/drying process in the estuarine–tidal-creek–saltmarsh complex of the Okatee/Colleton River Estuary, South Carolina. The simulation results were compared with observed currents at three mooring sites and flooded areas observed from remote-sensing hypsometric measurements, demonstrating that FVCOM can robustly reproduce tidal and residual currents in the river and the flooding process onto the intertidal saltmarsh. The simulated flow field reveals that the Okatee/Colleton River Estuary is characterized by multiple residual eddies. Driven by the periodic tidal forcing, this estuarine system features a chaotic water transport process. Numerous residual …

A Roadmap For Quality Control Of Hardening And Hardened Printed Concrete, Viktor Mechtcherine, Kim Van Tittelboom, Ali Kazemian, Eric Kreiger, Behzad Nematollahi, Venkatesh Naidu Nerella, Manu Santhanam, Geert De Schutter, Gideon Van Zijl, Dirk Lowke, Egor Ivaniuk, Markus Taubert, Freek Bos

Faculty Publications

This article focuses on the specifics in characterizing the properties of additively manufactured, cement-based materials in their hardening and hardened states. Such characterization is required for the material development, structural design, and quality control of both printable material and 3D-printed elements. The related challenges are associated with the printed material's layered structure, which results in higher degrees of anisotropy and inhomogeneity in comparison to conventionally cast concrete. Thus, in the production of test specimens, the particularities of the real-scale 3D-printing process must be considered. Here a distinction is made between the production of samples for material testing prior to or …

Creditors’ Rights In Property Subject To A Beneficiary’S Right Of Withdrawal, S. Alan Medlin, F. Ladson Boyle

Faculty Publications

Estate plans often give trust beneficiaries powers of withdrawal for both tax and nontax reasons. For tax reasons, these powers of withdrawal are typically limited, such as a “five or five power” or a so-called Crummey power commonly pegged to the annual gift tax exclusion amount. A central issue with limited powers of with-drawal is the right of a beneficiary’s creditor to reach trust property subject to the beneficiary’s power to withdraw. Recent uniform statutes, such as the Uniform Trust Code and the Uniform Power of Appointment Act, as well as the Restatement (Third) of Trusts, provide guidance. This Article …

Influence Of Guideline Operationalization On Youth Activity Prevalence In The International Children’S Accelerometry Database, Catherine Gammon, Andrew J. Atkin, Kirsten Corder, Ulf Ekelund, Bjorge Herman Hansen, Lauren B. Sherar, Lars Bo Anderson, Sigmund Anderssen, Rachel Davey, Pedro C. Hallal, Russell Jago, Susi Kriemler, Peter Lund Kristensen, Soyang Kwon, Kate Nothstone, Russell R. Pate Ph.D., J. O. Salmon, Luis B. Sardinha, Esther M.F. Sluijs

Faculty Publications

Introduction

The United Kingdom and World Health Organization recently changed their youth physical activity (PA) guidelines from 60 min of moderate- to vigorous-intensity PA (MVPA) every day, to an average of 60 min of MVPA per day, over a week. The changes are based on expert opinion due to insufficient evidence comparing health outcomes associated with different guideline definitions. This study used the International Children’s Accelerometry Database to compare approaches to calculating youth PA compliance and associations with health indicators.

Methods

Cross-sectional accelerometer data (n = 21,612, 5–18 yr) were used to examine compliance with four guideline definitions: daily …

Improved Writing From Reading Other Writers, Douglas E. Abrams

Faculty Publications

In 1954, a 12-year-old junior high school student wrote to Justice Felix Frankfurter seeking advice about how to prepare to become a lawyer. “The best way to prepare for the law,” Frankfurter answered, “is to come to the study of law as a well-read person.” Reading other writers, he explained, enables future lawyers to “acquire the capacity to use the English language on paper and in speech and with the habits of clear thinking.”

Justice Frankfurter offered his young correspondent sound advice about the intimate link among reading, writing, and lawyering. Reading works from other writers with an eye toward …

Acylsugars Protect Nicotiana Benthamiana Against Insect Herbivory And Desiccation, Honglin Feng, Lucia Acosta-Gamboa, Lars H. Kruse, Jake D. Tracy, Seung Ho Chung, Alba Ruth Nava Fereira, Sara Shakir, Hongxing Xu, Garry Sunter, Michael A. Gore, Clare L. Casteel, Gaurav D. Moghe, Georg Jander

Faculty Publications

Key message: Nicotiana benthamiana acylsugar acyltransferase (ASAT) is required for protection against desiccation and insect herbivory. Knockout mutations provide a new resource for investigation of plant-aphid and plant-whitefly interactions. Abstract: Nicotiana benthamiana is used extensively as a transient expression platform for functional analysis of genes from other species. Acylsugars, which are produced in the trichomes, are a hypothesized cause of the relatively high insect resistance that is observed in N. benthamiana. We characterized the N. benthamiana acylsugar profile, bioinformatically identified two acylsugar acyltransferase genes, ASAT1 and ASAT2, and used CRISPR/Cas9 mutagenesis to produce acylsugar-deficient plants for investigation of insect resistance …

Was The Decline Of Saltmarsh Tabanid Populations After The 2010 Oil Spill Associated With Change In The Larval Food Web?, Claudia Husseneder, Devika R. Bhalerao, Lane D. Foil

Faculty Publications

Horse flies of the species Tabanus nigrovittatus and Tabanus acutus are native to coastal marshlands. Their larvae are apex invertebrate predators, and their development is dependent on the food web in the marsh sediment. Surveillance of T. nigrovittatus after the 2010 Deepwater Horizon Oil Spill in the Gulf of Mexico showed population crashes of adult flies in southeast Louisiana marshes near oil landfall, but not in southwest Louisiana where oil did not reach. Sediment collection in 2011 from Louisiana marshes showed a near-complete absence of larvae in the southeast yet high numbers in the southwest. We hypothesized that oil contamination …

Event Based Approach For Modeling Indoor Airflow Patterns, Ehsan Mousavi, Arup Bhattacharya

Faculty Publications

People spend a significant proportion of their time indoors, where the quality of indoor air affects the productivity, efficiency, and well-being of occupants. One of the oldest challenges in building construction is designing a ventilation system that ensures optimum indoor air quality. Acceptable indoor air should provide thermal comfort and minimize human exposure to contamination. Characterizing these two elements requires information on both heat/mass transfer in the microenvironment and the time-specific activity of individuals who move among these microenvironments. While researchers have utilized simulation tools to investigate this complex human-environment interaction, current numerical techniques severely limit the simulations to overly …

Ethnic Discrimination And Alcohol-Related Problem Severity Among Hispanic/Latin Drinkers: The Role Of Social Anxiety In The Minority Stress Model, Julia D. Buckner, Elizabeth M. Lewis, Justin M. Shepherd, Michael J. Zvolensky

Faculty Publications

Introduction: Hispanic/Latin individuals in the U.S. experience many health disparities, including worse alcohol-related outcomes. Thus, identifying psycho-sociocultural factors that may play a role in alcohol-related problems among these individuals is vital to informing prevention and treatment efforts. Minority stress-based models of alcohol misuse posit that some Hispanic/Latin individuals may drink (and continue to drink despite drinking-related problems) to alleviate negative affect associated with experiencing ethnic discrimination. Yet, little research has directly tested this hypothesis. Given the social nature of both ethnic discrimination and drinking, it follows that experiencing more ethnic discrimination could be related to greater social anxiety and some …

From Soils To Streams: Connecting Terrestrial Carbon Transformation, Chemical Weathering, And Solute Export Across Hydrological Regimes, Hang Wen, Pamela L. Sullivan, Sharon A. Billings, Hoori Ajami, Alejandro Cueva, Alejandro Flores, Daniel R. Hirmas, Aaron N. Koop, Katie Murenbeeld, Xi Zhang, Li Li

Faculty Publications

Soil biota generates carbon that exports vertically to the atmosphere (CO2) and transports laterally to streams and rivers (dissolved organic and inorganic carbon, DOC and DIC). These processes, together with chemical weathering, vary with flow paths across hydrological regimes; yet an integrated understanding of these interactive processes is still lacking. Here we ask: How and to what extent do subsurface carbon transformation, chemical weathering, and solute export differ across hydrological and subsurface structure regimes? We address this question using a hillslope reactive transport model calibrated using soil CO2 and water chemistry data from Fitch, a temperate forest at the ecotone …

Erratum: The Perfect Storm? Covid-19 And Substance Use Amongst Social Work Students In The Usa (The British Journal Of Social Work (2021) Doi: 10.1093/Bjsw/Bcab192), Youn Kyoung Kim, Sung Seek Moon, Mansoo Yu, Mee Young Um, Arati Maleku, Omoshola Kehinde, David Pooler

Faculty Publications

In the originally published manuscript, the affiliation for co-author Dr Arati Maleku contained an error. This should read: College of Social Work instead of College only. This error is now corrected in the article online.

The Perfect Storm? Covid-19 And Substance Use Amongst Social Work Students In The Usa, Youn Kyoung Kim, Sung Seek Moon, Mansoo Yu, Mee Young Um, Arati Maleku, Omoshola Kehinde, David Pooler

Faculty Publications

During the COVID-19 pandemic, health risk behaviours related to substance use have been recognised as a significant public health concern amongst university students. Understanding the mechanisms of substance use behaviours, including those used to cope with COVID-19-related stressors, is imperative to curate targeted prevention efforts. To that end, we examined substance use prevalence and its associations with socio-demographic characteristics, preventive behaviours, and mental health amongst US social work students. We collected data from 457 students across all degree levels (BSW, MSW and PhD) from July to August 2020 through an online survey, to examine thirty-day patterns of substance use behaviours …

Edwardsiella Ictaluri T3ss Effector Esen Modulates Expression Of Host Genes Involved In The Immune Response, Lidiya P. Dubytska, Ranjan Koirala, Azhia Sanchez, Ronald Thune

Faculty Publications

The type III secretion system (T3SS) effector EseN is encoded on the Edwardsiella ictaluri chromosome and is homologous to a family of T3SS effector proteins with phosphothreonine lyase activity. Previously we demonstrated that E. ictaluri invasion activates extracellular signal-regulated kinases 1 and 2 (ERK1/2) early in the infection, which are subsequently inactivated by EseN. Com-parative transcriptomic analysis showed a total of 753 significant differentially expressed genes in head-kidney-derived macrophages (HKDM) infected with an EseN mutant (∆EseN) compared to HKDM infected with wild-type (WT) strains. This data strongly indicates classical activation of macrophages (the M1 phenotype) in response to E. ictaluri …

Beyond Quantum Cluster Theories: Multiscale Approaches For Strongly Correlated Systems, Herbert F. Fotso, Ka Ming Tam, Juana Moreno

Faculty Publications

The degrees of freedom that confer to strongly correlated systems their many intriguing properties also render them fairly intractable through typical perturbative treatments. For this reason, the mechanisms responsible for their technologically promising properties remain mostly elusive. Computational approaches have played a major role in efforts to fill this void. In particular, dynamical mean field theory and its cluster extension, the dynamical cluster approximation have allowed significant progress. However, despite all the insightful results of these embedding schemes, computational constraints, such as the minus sign problem in quantum Monte Carlo (QMC), and the exponential growth of the Hilbert space in …

Charging Of Radioactive And Environmental Airborne Particles, Gyoung G. Jang, Alexander I. Wiechert, Yong Ha Kim, Austin P. Ladshaw, Tyler Spano, Joanna Mcfarlane, Kristian Myhre, Joon Jin Song, Sotira Yiacoumi, Costas Tsouris

Faculty Publications

The charging of various airborne particles was investigated using single-particle levitation and charge-balance equations. Though radioactive decay and triboelectrification can induce charging, it is typically assumed that the aerosols in a radioactive plume will not carry significant charge at steady state since atmospheric particles can have their charge neutralized through the capture of adjacent counter-ions (i.e., diffusion charging). To assess this assumption, we directly measured the surface charge and charge density of various triboelectrically charged aerosols including radioactive uranium oxide (< 1 μm), urban dust, Arizona desert dust, hydrophilic and hydrophobic silica nanoparticles, and graphene oxide powders using an electric field-assisted particle levitator in air. Of these particles, uranium oxide aerosols exhibited the highest surface charge density. Charge balance equations were employed to predict the average charge gained from radioactive decay as a function of time and to evaluate the effects of diffusion charging on triboelectrically charged radioactive and non-radioactive particles in the atmosphere. Simulation results show that particles, initially charged through triboelectrification, can be quickly discharged by diffusion charging in the absence of radioactive decay. Nevertheless, simulation results also indicate that particles can be strongly charged when they carry radionuclides. These experimental and simulation results suggest that radioactive decay can induce strong particle charging that may potentially affect atmospheric transport of airborne radionuclides.

Low-Light Shadow Imaging Using Quadrature-Noise Detection With A Camera, Savannah L. Cuozzo, Pratik J. Barge, Nikunjkumar Prajapati, Narayan Bhusal, Hwang Lee, Lior Cohen, Irina Novikova, Eugeniy E. Mikhailov

Faculty Publications

This paper experimentally demonstrates an imaging technique based on quadrature noise modification after interaction with an opaque object. By using a homodyne-like detection scheme, the detrimental effect of the camera dark noise is eliminated, making this approach particularly attractive for imaging scenarios which require weak illumination. As an example, the image of an object illuminated with a squeezed vacuum is reconstructed using a total of 800 probing photons, utilizing less than one photon per frame on average.

Conditional Quantum Plasmonic Sensing, Fatemeh Mostafavi, Zeinab Jafari, Michelle L.J. Lollie, Chenglong You, Israel De Leon, Omar S. Magaña-Loaiza

Faculty Publications

The possibility of using weak optical signals to perform sensing of delicate samples constitutes one of the main goals of quantum photonic sensing. Furthermore, the nanoscale confinement of electromagnetic near fields in photonic platforms through surface plasmon polaritons has motivated the development of highly sensitive quantum plasmonic sensors. Despite the enormous potential of plasmonic platforms for sensing, this class of sensors is ultimately limited by the quantum statistical fluctuations of surface plasmons. Indeed, the fluctuations of the electromagnetic field severely limit the performance of quantum plasmonic sensing platforms in which delicate samples are characterized using weak near-field signals. Furthermore, the …

Symplectic Effective Field Theory For Nuclear Structure Studies, D. Kekejian, J. P. Draayer, V. I. Mokeev, C. D. Roberts

Faculty Publications

A symplectic effective field theory that unveils the observed emergence of symplectic symmetry in atomic nuclei is advanced. Specifically, starting from a simple extension of the harmonic-oscillator Lagrangian, an effective field theory applied against symplectic basis states is shown to yield a Hamiltonian system with one fitted parameter. The scale of the system can be determined self-consistently as the ratio of the average volume of a nucleus assumed to be spherical to its volume as determined by the average number of oscillator quanta, which is stretched by the fact that the plane-wave solution satisfies the equations of motion at every …

An Isolated Stellar-Mass Black Hole Detected Through Astrometric Microlensing, Kailash C. Sahu, Kailash C. Sahu, Jay Anderson, Stefano Casertano, Howard E. Bond, Andrzej Udalski, Martin Dominik, Annalisa Calamida, Andrea Bellini, Thomas M. Brown, Marina Rejkuba, Varun Bajaj, Noé Kains, Henry C. Ferguson, Chris L. Fryer, Philip Yock, Przemek Mróz, Szymon Kozłowski, Paweł Pietrukowicz, Radek Poleski, Jan Skowron, Igor Soszyński, Michał K. Szymański, Krzysztof Ulaczyk, Łukasz Wyrzykowski, Richard K. Barry, David P. Bennett, Ian A. Bond, Yuki Hirao, Stela Ishitani Silva, Iona Kondo, Naoki Koshimoto, Clément Ranc

Faculty Publications

We report the first unambiguous detection and mass measurement of an isolated stellar-mass black hole (BH). We used the Hubble Space Telescope (HST) to carry out precise astrometry of the source star of the long-duration (t E ≃ 270 days), high-magnification microlensing event MOA-2011-BLG-191/OGLE-2011-BLG-0462 (hereafter designated as MOA-11-191/OGLE-11-462), in the direction of the Galactic bulge. HST imaging, conducted at eight epochs over an interval of 6 yr, reveals a clear relativistic astrometric deflection of the background star's apparent position. Ground-based photometry of MOA-11-191/OGLE-11-462 shows a parallactic signature of the effect of Earth's motion on the microlensing light curve. Combining the …

The Dual Nature Of The Nucleolus, Alan Tartakoff, Patrick Dimario, Eduard Hurt, Brian Mcstay, Vikram Govind Panse, David Tollervey

Faculty Publications

The nucleolus is best known for housing the highly ordered assembly line that produces ribosomal subunits. The >100 ribosome assembly factors in the nucleolus are thought to cycle between two states: an operative state (when integrated into subunit assembly intermediates) and a latent state (upon release from intermediates). Although it has become commonplace to refer to the nucleolus as “being a multilayered condensate,” and this may be accurate for latent factors, there is little reason to think that such assertions pertain to the operative state of assembly factors.

Mitochondrial Dna And Other Lines Of Evidence Clarify Species Diversity In The Peromyscus Truei Species Group (Cricetidae: Neotominae), Giovani Hernández-Canchola, Livia León-Paniagua, Jacob A. Esselstyn

Faculty Publications

Deer mice (genus Peromyscus) are among the commonest small mammals in the Nearctic zoogeographic region. Nevertheless, systematic relationships are only partially settled and numerous taxonomic questions await resolution. For instance, researchers have found that some members of the Peromyscus truei species group contain high levels of genetic divergence that could indicate the presence of cryptic species. We analyzed the systematics and phylogenetic relationships of the P. truei group using new and previously published mitochondrial cytochrome b sequences. Our analyses verify several earlier conclusions, but we also detected new clades that deserve recognition. Considering their mitochondrial distinctiveness, allopatric ranges, and previously …

Planetary-Scale Change To The Biosphere Signalled By Global Species Translocations Can Be Used To Identify The Anthropocene, Mark Williams, Reinhold Leinfelder, Anthony D. Barnosky, Martin J. Head, Francine M.G. Mccarthy, Alejandro Cearreta, Stephen Himson, Rachael Holmes, Colin N. Waters, Jan Zalasiewicz, Simon Turner, Mary Mcgann, Elizabeth A. Hadly, M. Allison Stegner, Paul Michael Pilkington, Jérôme Kaiser, Juan Carlos Berrio, Ian P. Wilkinson, Jens Zinke, Kristine L. Delong

Faculty Publications

We examine three distinctive biostratigraphic signatures of humans associated with hunting and gathering, landscape domestication and globalization. All three signatures have significant fossil records of regional importance that can be correlated inter-regionally and help describe the developing pattern of human expansion and appropriation of resources. While none have individual first or last appearances that provide a globally isochronous marker, all three signatures overlap stratigraphically, in that they are part of a continuum of change, with complex regional patterns. Here we show that during the later stages of globalization, late nineteenth to twentieth century records of species translocations can be used …