- Author: Kathy Keatley Garvey
Seminar coordinator and associate professor Brian Johnson has announced the list of UC Davis Department of Entomology and Nematology seminars for the winter quarter, from Jan. 8 through March 11.
All seminars will be on Mondays at 4:10 p.m. in Room 122 of Briggs Hall and also will be on Zoom.The Zoom link: https://ucdavis.zoom.us/j/95882849672.
No seminar will take place on Monday, Jan. 15, which is Martin Luther King Jr. Day, a university holiday.
Adler Dillman
Professor of parasitology and nematology, and chair of the Department of Nematology, UC Riverside
Title: "Nematode Parasitism of Insects with Toxic Cardenolides"
Abstract: (Partial) "Target-site insensitivity (TSI) is an important mechanism of animal resistance to toxins. TSI evolved in parallel in the monarch butterfly and other insects that specialize on milkweeds and is thought to have facilitated sequestration of cardiac glycosides (CGs) that may protect these insects from predation and parasitism....Our results suggest that a molecular evolutionary cascade of parallel substitutions across hosts and parasites, last sharing common ancestry 600 million years ago, may shape multitropic interactions across plant communities."
Biography: He holds a bachelor's degree in microbiology from Brigham Young University (2006) and a doctorate in genetics (2013) from the California Institute of Technology.
William Ja
Associate professor, Herbert Wertheim Scripps UF Institute for Biomedical Innovation and Technology in Jupiter, Florida.
Title: "Eat, Excrete, & Die: Regulation of Homeostatic Behaviors and Aging in Drosophila"
Abstract: "The Ja lab uses the fruit fly, Drosophila melanogaster, as a model organism for uncovering the genetic and neuronal mechanisms that drive aging, behavior, and disease. Recently developed tools allow us to track fly feeding behavior with unparalleled resolution. These tools facilitate the identification of genes and circuits that regulate food intake at diverse time scales, including studies of: 1) meal intake; 2) daily (circadian) feeding rhythms; and 3) compensatory feeding in response to high or low quality food. Our studies of feeding behavior and nutrition also inform aging interventions, including a novel caloric restriction paradigm and an intermittent fasting regime that extends fly life through the stimulation of circadian-regulated autophagy. Overall, our fly studies shed light on basic neurobiological principles that drive animal behavior, providing insights that potentially inform the development of conserved therapeutic strategies."
Biography: Ja received his chemistry degree at UC Berkeley, working with Richard Mathies and Alex Glazer on DNA sequencing technologies. He pursued doctoral studies at the California Institute of Technology with Rich Roberts, utilizing mRNA display technology to identify modulators of G protein signaling. Ja remained at Cal Tech as a postdoctoral scholar to work with Seymour Benzer on developing longevity ‘drugs' in Drosophila. His laboratory focuses on aging and nutrition, animal behavior, and host-microbiome interactions.
Todd Johnson
Assistant professor of forest entomology, Louisiana State University
Title: "Characterizing Ecological Interactions of Arthropods in Forests under Global Change'
Abstract: "Forests cover approximately 30% of the Earth's landmass and provide important ecosystem services that include food, fuel, and timber, as well as habitat for diverse organisms. Threats posed to forests by invasive and pestiferous species are rapidly growing. Global change, an umbrella term that includes may human-mediated processes such as climate change and international trade, is altering the structure and functioning of forests. Our recently formed research group studies how natural variation impacts the outcomes of interactions between trees, herbivores, and the natural enemies of herbivores. My seminar will provide an overview of our ongoing and developing studies to better understand how variation in chemistry across the landscape shapes the fitness of woodboring insects, and how this variation can be harnessed to optimize management of forest ecosystems."
Biography: His research group studies the behavioral and chemical ecology of forest arthropods, with an emphasis on building fundamental knowledge that can further our understanding and management of natural and managed ecosystems. Johnson received his bachelor's degree in biology from Moravian College, his master's degree in entomology from the University of Wisconsin-Madison, and his doctorate from the University of Illinois at Urbana-Champaign. Prior to accepting his position at LSU in the fall of 2022, he was a postdoctoral research associate at the University of New Hampshire.
Orie Shafer
Professor of biology and cognitive neuroscience, City University of New York
Title: "Circadian and Homeostatic Regulation of Fly Sleep"
Abstract: "Sleep-like states are ubiquitous in the animal kingdom and are regulated by two distinct forms of regulation, circadian and homeostatic. Homeostatic mechanisms promote increases in sleep pressure during prolonged wakefulness. Circadian mechanisms determine the likelihood of sleep, increasing or decreasing its probability across the day. Though the molecular and neural mechanisms of circadian timekeeping are relatively well-understood, much less is known about the mechanistic basis of sleep homeostasis. The fly Drosophila melanogaster is a powerful model organism for the studying of sleep regulation. In this talk I will describe recent work from my lab examining how circadian timekeeping and sleep homeostasis operate in this fly and how these two regulatory processes converge to produce the proper timing and amount of sleep."
Biography: He received his doctorate in biology from the University of Washington, and served as a postdoctoral researcher at Washington University School of Medicine, St. Louis.
Peter Piermarini
Professor and associate chair of entomology, The Ohio State University, Wooster
Title: "Discovery of Novel Chemical Tools for Controlling the Most Dangerous Animals on Earth"
Abstract: "Mosquitoes are considered the most dangerous animals on Earth due to the deadly pathogens they transmit to humans. Controlling the transmission of mosquito-borne diseases often relies on chemical tools that prevent mosquitoes from biting humans (e.g., insecticides, repellents). However, the evolution of resistance in mosquitoes to commonly used control agents with similar modes of action has generated a need to discover novel chemistries for killing and/or repelling mosquitoes. To address this need, my lab is engaged in collaborative research that is discovering synthetic small molecules to disrupt novel physiological targets in mosquitoes and screening natural products for insecticidal and repellent activity against mosquitoes. My talk will summarize examples for each of these approaches and their potential for development into novel mosquito control tools."
Biography: He received his bachelor's degree in biology from James Madison University and doctorate in zoology from the University of Florida, before completing postdoctoral training at the Yale University School of Medicine and Cornell College of Veterinary Medicine. His laboratory studies the molecular physiology and toxicology of mosquitoes with the goal of discovering and developing insecticides with novel modes of action.
Monday, Feb. 26
Professor and director of graduate programs, Department of Entomology and Plant Pathology, North Carolina State University
Title: "“Advances and Innovations in the Characterization of Molecular Interactions Between
Frankliniella occidentalis and Tomato Spotted Wilt Virus.”
Biography: Dorith (pronounced Doreet) Rotenberg received three degrees from the University of Wisconsin-Madison: bachelor of science degree in biochemistry and her master's and doctorate in plant pathology. She is a professor in the Department of Entomology and Plant Pathology at North Carolina State University (NCSU) and the director of Graduate Programs in Plant Pathology. She co-directs the NCSU Plant Virus Vector Interactions Lab. Her foundational research initiatives center on the long-range goal of identifying and characterizing insect vector determinants of plant virus transmission to crop plants using a combination of ecological and genomics-based tools. Her research program has provided to the international science community vector genome, transcriptome, and proteome sequence resources to dig deeply into commonly-shared questions revolving around insect evolution, development, and transmission biology.
Abstract: "Arthropod-transmitted plant pathogens cause crippling monetary losses to U.S. and global economies. Tomato spotted wilt virus (Order Bunyavirales, family Tospoviridae, genus Orthotospovirus) is one of those pathogens, and it is transmitted in a circulative-propagative manner by Frankliniella occidentalis, the principal thrips vector. The overarching goal of my research program is to contribute fundamental knowledge towards developing alternative, effective and innovative tools for diminishing vector-transmitted crop diseases. My lab has been on the forefront of generating and sharing vector ‘omics resources to enable the identification and characterization of molecular determinants of vector competence as a means to specifically disrupt the virus transmission cycle. Using a combination of proteomic, transcriptomic and functional tools developed by my team and collaborators for F. occidentalis and TSWV, we aim to drill down on gut proteins associated with thrips host response to virus activities (indirect interactions) and/or gut proteins that physically interact with the viral attachment protein (GN) (direct). My talk will cover research advances made towards identifying and functionally characterizing two promising gut-expressed proteins, and new tools to interrogate F. occidentalis genes associated with virus transmission."
Salil Bidaye
Research Group Leader, Max Planck Florida Institute for Neuroscience
Title: "How Flies Control How They Walk by Knowing When and How to Stop"
Abstract: "Walking is a complex motor program involving coordinated and distributed activity across the brain and the spinal cord. Halting appropriately at the correct time is a critical but often overlooked component of walking control. While recent studies have delineated specific genetically defined neuronal populations in the mouse brainstem that drive different types of halting, the underlying neural circuit mechanisms responsible for overruling the competing walking-state neural activity to generate context-appropriate halting, remain unclear. Here, we elucidate two fundamental mechanisms by which Drosophila implement context-appropriate halting. The first mechanism (“walk-OFF” mechanism) relies on GABAergic neurons that inhibit specific descending walking commands in the brain, while the second mechanism (“brake” mechanism) relies on excitatory cholinergic neurons in the nerve-cord that lead to an active arrest of stepping movements. Using connectome-informed models and functional studies, we show that two neuronal types that deploy the “walk-OFF” mechanism inhibit distinct populations of walking-promotion neurons, leading to differential halting of forward-walking or steering. The “brake” neurons on the other hand, override all walking commands by simultaneously inhibiting descending walking promoting pathways and increasing the resistance at the leg-joints leading to an arrest of leg movements in the stance phase of walking. We characterized two ethologically relevant behavioral contexts in which the distinct halting mechanisms were used by the animal in a mutually exclusive manner: the “walk-OFF” pathway was engaged for halting during feeding, and the “brake” pathway was engaged for halting during grooming. To our knowledge, this represents the first mechanistic understanding of halting in fruit-flies and hence a major step in our larger goal of uncovering the fundamental principles governing walking control in animals."
Biography: Bidaye studies neuronal control of locomotion."While a graduate student in Barry Dickson's lab in the beautiful city of Vienna, Austria, as I observed fruit-flies chasing each other during courtship, I got hooked on to the intricate control that comprises insect walking. This fascination kindled by powerful fly genetic tools, has led me to persistently device new behavioral assays and neural recording techniques, aimed at elucidating the fundamental control mechanisms that underlie the exquisite locomotor control that is commonplace in all animals."
Inga Zasada
Research plant pathologist, USDA-ARS Horticultural Crops Research Laboratory, Corvallis, Ore.
Title: "How an Applied Nematologist Uses Genomic Tools to Address Plant-Parasitic Nematode Research"
Abstract: "Advancements in molecular plant pathology have created an environment in which applied, field-based research programs have the opportunity to utilize genomic tools in their programs. There are potential rewards for incorporating genomics into a research program including enhanced nematode diagnostics, population genetics of infestations, and novel biological discoveries. However, along with these rewards come many considerations including cost, tempered expectations, and the capacity to generate and analyze data. A cautionary tale of such a journey will be presented. Efforts to characterize the nematode microbiomes from a diversity of plant-parasitic nematodes, understand the population genetics of a potato cyst nematode infestation, and sequence and annotate nematodes genomes will be presented to highlight the rewards and challenges of this type of research. Underpinning all of these efforts is the need to establish and maintain productive collaborations with scientists with diverse backgrounds."
Biography: Inga Zasada is a research plant pathologist with USDA-ARS. She received her doctorate in plant pathology from UC Davis. She has spent her entire career with USDA-ARS, first in Beltsville, MD and now in Corvallis, OR. Her research program focuses on the management of plant-parasitic nematodes in raspberry, wine grapes, potatoes and other high value crops.
For Zoom technical issues, contact seminar coordinator Brian Johnson, associate professor, at brnjohnson@ucdavis.edu.
- Author: Kathy Keatley Garvey
Eight of the 10 seminars are both in-person and virtual, while two will be virtual only. The in-person seminars will take place from 4:10 to 5 p.m. (Pacific Time) on Wednesdays in Room 122 of Briggs Hall, located off Kleiber Drive. All seminars will live-streamed on Zoom and recorded for future viewing. The Zoom link: https://ucdavis.zoom.us/j/95882849672.
The topics range from bark beetles and meat-eating bees to exit seminars by two UC Davis Department of Entomology and Nematology doctoral candidates.
Wednesday, Jan. 11--Virtual Only
Clément Vinauger, Ph.D.
Assistant professor
Virginia Tech Department of Biochemistry
Title: "Neural and Molecular Basis of Mosquito Behavior"
Host: Joanna Chiu, professor and vice chair, UC Davis Department of Entomology and Nematology
Wednesday, Jan. 18
Quinn McFredrick, Ph.D.
Assistant professor
UC Riverside Department of Entomology
Title: "The Weird World of Pathogens, Microbes, and Meat-Eating Bees"
Wednesday, Jan. 25
Lisa Chamberland, Ph.D.
Post-doctoral fellow, Jason Bond Lab
UC Davis Department of Entomology and Nematology
Title: Pending
Host: Jason Bond, the Evert and Marion Schlinger Endowed Chair, UC Davis Department of Entomology and Nematology and associate dean, UC Davis College of Agricultural and Environmental Sciences.
Wednesday, Feb. 1
Chris Fettig, Ph.D.
Research entomologist
U. S. Forest Service
Title: "Bark Beetles: How Tiny Insects Are Transforming Western Forests with a Little Help from Climate Change'
Wednesday, Feb. 8
Lauren Ponisio, Ph.D.
Assistant professor
University of Oregon Department of Biology
Title: "Disease in Plant-Pollinator Communities"
Host: Rachel Vannette, associate professor, UC Davis Department of Entomology and Nematology
Wednesday, Feb. 15
Christine Tabuloc, doctoral candidate
Molecular geneticist, Joanna Chiu lab
UC Davis Department of Entomology and Nematology
Title: (Title pending; this is her exit seminar)
Host: Joanna Chiu, professor and vice chair, UC Davis Department of Entomology and Nematology
Wednesday, Feb. 22
Kyle Lewald, doctoral candidate
Molecular geneticist, Joanna Chiu lab
UC Davis Department of Entomology and Nematology
Title: "Using Genomic Data to Understand and Prevent the Spread of Tuta absoluta" (exit seminar)
Host: Joanna Chiu, professor and vice chair, UC Davis Department of Entomology and Nematology
Wednesday, March 1
Dana Nayduch, Ph.D.
Research entomologist
USDA-ARS Center for Grain and Animal Health Research
Title: "Can Surveying Microbial Communities of House Flies Help Us Understand Emerging Threats to Animal and Human Health?"
Wednesday, March 8
Amy Worthington, Ph.D.
Assistant professor
Creighton University Department of Biology
Title: "A Host of Hardships: The Costs of Harboring a Long-Lived Parasite"
Host: Joanna Chiu, professor and vice chair, UC Davis Department of Entomology and Nematology
Wednesday, March 15 -- Virtual Only
Sylvain Pincebourde, Ph.D.
Researcher
University of Tours, Insect Biology Research Institute
Title: "The Key Role of Microclimates in Modulating the Response of Ectotherms to Climate Change"
Host: Emily Meineke, assistant professor, UC Davis Department of Entomology and Nematology
The Department of Entomology and Nematology, ranked among the top entomology departments in the United States, is chaired by nematologist and professor Steve Nadler. Vice chair is molecular geneticist and physiologist Joanna Chiu.
For further information on the seminars or technical difficulties with Zoom, contact Meineke at ekmeineke@ucdavis.edu.
- Author: Kathy Keatley Garvey
All will take place from 4:10 to 5 p.m., Wednesdays in 122 Briggs Hall.
The seminars:
Wednesday, Jan. 9
Brian Gress, postdoctoral fellow in the Frank Zalom lab, UC Davis Department of Entomology and Nematology
Title: "Host Selection and Resistance Evolution in Drosophila suzukii"
Host: Frank Zalom, distinguished professor of entomology, UC Davis Department of Entomology and Nematology
Wednesday, Jan. 16
No seminar today. (Seminar by Sarah Stellwagen, postdoctoral researcher, University of Maryland
will present her previously scheduled seminar on “Toward Spider Glue: From Material Properties to Sequencing the Longest Silk Family Gene” on April 24.)
Wednesday, Jan. 23
Jenita Thinakaran, UC Davis postdoctoral researcher based at the Shafter Agricultural Research Station
Title: "A Systems Approach to Managing Potato Psyllid in Relation to Its Alternate Hosts"
Host: Geoffrey Attardo, assistant professor of entomology, UC Davis Department of Entomology and Nematology
Wednesday, Jan. 30:
Laura Burkle, assistant professor of ecology, Montana State University, Bozeman
Topic: Wild bees, interactions with flowers
Hosts: Pollination ecologist Neal Williams, professor of entomology, and Maureen Page, doctoral student in the Williams lab, UC Davis Department of Entomology and Nematology
Wednesday, Feb. 6
Alan Hastings, theoretical ecologist and distinguished professor, UC Davis Department of Environmental Science and Policy
Title: "Stochasticity and Spatial Population Dynamics"
Host: Hanna Kahl, doctoral student in the Jay Rosenheim lab, UC Davis Department of Entomology and Nematology
Wednesday, Feb. 13
Antoine Abrieux, postdoctoral fellow, Joanna Chiu lab, UC Davis Department of Entomology and Nematology
Title: "Understanding the Molecular Mechanisms underlying Photoperiodic Time Measurement in Drosophila melanogaster"
Host: Joanna Chiu, associate professor and vice chair of the UC Davis Department of Entomology and Nematology
Wednesday, Feb. 20:
Alexander Raikhel, distinguished professor, UC Riverside
Title: "The Role of Hormone Receptors and MicroRNAs in Mosquito Reproduction and Metabolism"
Host: Geoffrey Attardo, assistant professor, UC Davis Department of Entomology and Nematolgoy
Wednesday, Feb. 27:
Lauren Esposito, faculty member, San Francisco State University, and assistant curator and Schlinger Chair of Arachnology at the California Academy of Sciences
Title: "Evolution of New World Scorpions and Their Venom"
Host: Jason Bond, Evert and Marion Schlinger Endowed Chair in Insect Systematics, UC Davis Department of Entomology and Nematology
Wednesday, March 6:
Monika Gulia-Nuss, assistant professor, biochemistry and molecular biology, University of Nevada, Reno
Topic: DNA Methylation in Ticks
Host: Geoffrey Attardo, assistant professor, UC Davis Department of Entomology and Nematology
Wednesday, March 13:
Stephen "Fringy" Richards, associate professor, Baylor College of Medicine, Human Genome Sequencing Center.
Topic: "Evolutionary Genomic Innovation Within the Phylum Arthropoda"
Host: Steve Nadler, professor and chair, UC Davis Department of Entomology and Nematology
Spring Break: March 20-27
For further information on the seminars, contact Geoffrey Attardo at gmattardo@ucdavis.edu.
- Author: Kathy Keatley Garvey
The seminars begin Jan. 10 and will continue through March 14. All will take place on Wednesdays from 4:10 to 5 p.m. in 122 Briggs Hall, Kleiber Hall Drive.
Coordinators are assistant professor Rachel Vannette; Extension apiculturist Elina Niño; and Ph.D student Brendon Boudinot of the Phil Ward lab.
The schedule (subject to change):
Jan. 10: Amy Morrison, UC Davis epidemiologist, project scientist and scientific director of the Naval Medical Research Unit No. 6 (NAMRU-6) Iquitos Laboratory. Topic: "Targeting Aedes Aegypti Adults for Dengue Control: Infection Experiments and Vector Control in Iquitos."
Jan. 17: Fiona Goggin, professor of entomology, University of Arkansas and a UC Davis alumnus. Topic: “Molecular and Phenomic Approaches to Study Plant Defenses against Insects and Nematodes."
Jan. 24: David Gonthier, postdoctoral fellow, Clare Kremen lab, UC Berkeley. Topic: to be announced. His primary research objective is to understand the importance of biodiversity across natural and managed ecosystems.
Jan. 31: Amanda Hodson, UC Davis postdoctoral fellow and assistant professional researcher with Louise Jackson's Soil Ecology Lab, UC Davis. Topic: "Molecular Detection and Integrated Management of Plant Parasitic Nematodes." Her research interests include soil ecology, integrated pest management and ecological intensification of agricultural systems.
Feb. 7: Marm Kilpatrick, assistant professor, Department of Ecology and Evolutionary Biology, UC Santa Cruz. Topic: to be announced. He studies ecology of infectious diseases and population biology. His research "unites theory and empirical work to address basic and applied questions on the ecology of infectious diseases as well as population biology, evolution, climate, behavior, genetics, and conservation."
Feb. 14: Maj Rundlöf of Lund University, Sweden, a visiting International Career Grant (INCA) fellow in the Neal Williams lab, will speak on “Pesticide Exposure and Flower Resources as Drivers of Bumble Bee Diversity in Agricultural Landscapes"
Feb. 21: Kerry Mauck, assistant professor of entomology, UC Riverside, will speak on “How Plant Viruses Use Chemistry to Manipulate Hosts and Vectors." She studies insect vector behavior, plant-pathogen interactions, chemical ecology, and integrated disease management.
Feb. 28: Brendon Boudinot, Ph.D candidate in the Phil Ward lab, UC Davis Department of Entomology and Nematology, will speak on "Phylogenetic Morphology of the Big-Eyed Tree Ants and Kin (Formicidae: Pseudomyrmecinae)."
March 7: John Tooker, associate professor of entomology and Extension specialist, Department of Entomology, Pennsylvania State. Topic: to be announced. His areas of expertise include insect ecology, plant-insect interactions, conservation biological control, chemical ecology and gall insects.
March 14: Alvaro Acosta-Serrano, senior lecturer, Liverpool School of Tropical Medicine. Topic: to be announced. His research focuses on fundamental aspects of the biology of kinetoplastid parasites and their vectors, and on developing molecular tools to control and prevent parasite transmission in disease-endemic areas.
For more information, contact Vannette at rlvannette@ucdavis.edu; Niño at elnino@ucdavis.edu or Boudinot at boudinotb@gmail.com.
- Author: Kathy Keatley Garvey
All seminars will take place on Wednesdays from 4:10 to 5 p.m. from Jan. 11 through March 15 in 122 Briggs Hall. The only exception is the Thursday, Feb. 9 seminar, which is the Thomas and Nina Leigh Distinguished Alumni Award. (See below) The seminars are open to all interested persons.
The schedule:
Wednesday, Jan. 11
Marco Gebiola, postdoctoral fellow, University of Arizona, Tucson
Topic: "From Embroys to Hybrids: How the Symbiont Cardinium Shapes the Ecology and Evolution of Encarsia Parasitoids"
Wednesday, Jan. 18
Diane Ullman, professor, UC Davis Department of Entomology and Nematology
Topic: "Journey into the Microcosm: A Closer Look at the Western Flower Thrips"
Wednesday, Jan. 25
Sharon Lawler, professor of entomology, and Ph.D candidate Erin Donley, UC Davis Department of Entomology and Nematology
Topic: "Effects of Aquatic Vegetation and Its Management on Aquatic Invertebrates"
Wednesday, Feb. 1
Greg Sword, professor and Charles R. Parencia Chair in Cotton Entomology, Department of Entomology, Texas A&M, College Station
Topic: "Fungal Endophytes Can Mediate Resistance to Insects, Nematodes and Drought in Cotton Agroecosytems"
Thursday, Feb. 9 (Thomas and Nina Leigh Distinguished Alumni Seminar)
Jennifer Thaler, professor, Department of Entomology, Cornell University, Ithaca, N.Y.
Topic: "Tritrophic Interactions and the Ecology of Fear"
Reception from 3:30 to 4:15 p.m. in the International House, 10 College Park, Davis, CA.
Seminar from 4:15 to 5 p.m. at International House
Watch her Feb. 9 seminar on YouTube https://youtu.be/AM-mQZbpTro
Wednesday, Feb. 15
Pedro Miura, assistant professor, Department of Biology, University of Nevada, Reno
Topic: "Age Accumulation of CircRNAs"
Wednesday, Feb. 22
Jared Ali, assistant professor of entomology, Pennsylvania State University, University Park
Topic: "Multi-Trophic Interactions and the Chemical Ecology of Plant Defenses in Above and Below Ground Contexts"
Wednesday, March 1
Christian Nansen, assistant professor, UC Davis Department of Entomology and Nematology
Topic: "Reflectance Profiling as a Tool to Study Insects and Other Objects"
Wednesday, March 8
Kelli Hoover, professor of entomology, Pennsylvania State University, University Park
Topic: "Mechanisms of Resistance in Poplar Against the Asian Longhorned Beetle and Its Gut Symbionts"
Wednesday, March 15
William Meikle, Carl Hayden Bee Research Center, Agricultural Research Center, U.S. Department of Agriculture
Topic: "Using Continuous Monitoring to Measure Colony-Level Behavior in Social Insects: A Case Study with Honey Bees"
Christian Nansen, seminar coordinator: chrnansen@ucdavis.edu
Jessica Padilla, graduate program coordinator: jespadilla@ucdavis.edu