Lacie Newton working within the discipline.
UC Davis doctoral candidate Lacie Newton coated two chapters of her dissertation when she lately delivered her exit seminar, in-person and by way of Zoom, on “Evolution and Speciation within the Trapdoor Spider Genus Aptostichus” in Briggs Corridor.
Newton research with Professor Jason Bond, affiliate dean, School of Agricultural and Environmental Sciences, and the Evert and Marion Schlinger Endowed Chair in Insect Systematics, UC Davis Division of Entomology and Nematology.
“Spiders positioned within the infraorder Mygalomorphae (tarantulas, trapdoor spiders and their kin) are typically acknowledged as an historic cosmopolitan lineage that has persevered for over 250 million years,” Newton wrote in her summary. “Mygalomorph life historical past traits that embody restricted dispersal talents, habitat specialization, and website constancy altogether make them very best organisms for finding out speciation sample and course of, phylogeography, and adaptation. Evolutionary research of mygalomorphs at each shallow and deeper phylogenetic ranges have been restricted previous to the arrival of subsequent era sequencing approaches, with nearly all of such research counting on morphological characters or restricted focused locus approaches for phylogenetic reconstruction. Thus, it’s crucial to implement bigger genomic-scale datasets for assured reconstruction of relationships.”
Her dissertation focuses on species delimitation in two trapdoor spider teams, Antrodiaetus unicolor advanced and Aptostichus icenoglei sister species advanced, and analysis of interspecific relationships throughout the genus Aptostichus. To handle species boundaries within the A. unicolor species advanced, she applied genomic-scale information (that it, restriction-site related DNA sequencing, RADseq) at the side of morphological, behavioral, and ecological information to guage cohesion species identification (Chapter I).
Equally, assessing species boundaries within the Aptostichus icenoglei sibling species advanced concerned a goal seize strategy for subgenomic information (that’s, ultraconserved components, UCEs) and ecological information to guage genetic and ecological exchangeability, as per the cohesion species-based delimitation strategy from a earlier research (Chapter II).
Lacie Newton research this trapdoor spider, Aptostichus barackobamai, present in Sonoma County, Calif. on Hwy 253. (Jason Bond lab photograph)
“Lastly, to resolve interspecific relationships inside Aptostichus, I used a sequence seize methodology (that’s, UCEs) to generate molecular information at the side of morphological information for a combined-evidence phylogeny (Chapter III). These chapters all have the identical overarching theme: to know the forces underlying divergence between models of range and the way these models are outlined.”
Newton expects to obtain her doctorate by the top of summer time and “then I will likely be heading to the American Museum of Pure Historical past the place I will likely be working in Jessica Ware’s lab as a postdoctoral fellow on systematics of broader Odonata in addition to Anisoptera (dragonflies).”
First-Technology School Pupil. Born and raised in Eupora, Miss., Lacie is a first-generation school pupil. She acquired her bachelor of science diploma in organic sciences from Millsaps School in 2016 after which enrolled within the graduate faculty program at Auburn College, Alabama, finding out with Professor Bond. When he accepted the Schlinger Endowed Chair in Insect Systematics in 2018, Lacie, together with different lab members, transferred to UC Davis.
What sparked her curiosity in spiders? “I truly was fearful of spiders,” Lacie acknowledged. “It wasn’t till fall semester of my sophomore yr once I took a zoology course that I started to understand not solely the huge quantity of range inside spiders but additionally how superb they’re as a bunch, such because the tensile energy of spider silk being corresponding to metal, spider venoms enjoying a task in potential medical functions, and a myriad of feeding methods, and so on..”
Her analysis on folding-door spiders or the Antrodiaetus unicolor species advanced led to a journal article printed in Molecular Ecology: “Integrative Species Delimitation Reveals Cryptic Range within the Southern Appalachian Antrodiaetus unicolor (Araneae: Antrodiaetidae) Species Complicated.” UC Davis co-authors are Professor Bond, who’s the Evert and Marion Schlinger Endowed Chair in Insect Systematics, and undertaking scientist James Starrett of the Bond lab.
Newton is lively in each the American Arachnological Society (AAS) and the Society of Systematic Biologists. She received a second-place award for her oral presentation on species delimitation on the 2019 AAS assembly, held at Washington and Lee College, Lexington, Va.
At UC Davis, Newton served as a educating assistant for the “Introduction to Biology: Biodiversity and the Tree of Life” course. Her resume additionally contains:
- mentoring undergraduate college students within the Mentoring Program, Fairness in Science, Expertise, Engineering, Math, and Entrepreneurship (ESTEME) group, a graduate pupil group devoted to enhancing fairness and inclusion in STEM fields, entrepreneurship, and management positions.
- volunteering on the admissions committee for GOALS, the Ladies’ Outside Journey in Management and Science, a summer time science program for highschool college students to be taught science hands-on whereas backpacking by means of the wilderness.
AAS Convention at UC Davis. Newton is wanting ahead to the AAS convention, set June 26-30, at UC Davis, and will likely be helping on the Eight-Legged Encounters open home from 1 to 4 p.m., June 25 on the Bohart Museum of Entomology, situated in Room 1124 of the Tutorial Surge Constructing on Crocker Lane. The occasion will formally kick off the AAS assembly.
A “powerhouse” of arachnologists will likely be taking part, stated Bond, who will likely be internet hosting the convention with Lisa Chamberland, postdoctoral analysis affiliate, Division of Entomology and Nematology, and Joel Ledford, assistant professor of educating, Division of Plant Biology, School of Organic Sciences.
Professor Eileen Hebets of the College of Organic Sciences, College of Nebraska, Lincoln, is co-hosting the open home as a part of a U.S. Nationwide Science Basis grant, “Eight-Legged Encounters” that she developed as an outreach undertaking to attach arachnologists with communities, particularly youth.
Some 20 reveals and actions will likely be arrange within the hallway of the Tutorial Surge Constructing, stated Tabatha Yang, the Bohart Museum’s schooling and outreach coordinator. “There will likely be everything–spider specimens, dwell arachnids, actions, art work, and so on.,” Bond associated.
One other spotlight of the American Arachnological