I am a geomicrobiologist and assistant professor of environmental biology within the Division of Natural Sciences at Maryville College in Tennessee. To understand the mutual interactions between microorganisms and their surroundings, I harness the power of an interdisciplinary approach, bridging the divide between the fields of Earth and Life science. This exciting work allows me to investigate the relationships between microorganisms and their environment in some of the most extreme places on Earth, including boiling hot springs , energy-starved, deeply buried marine sediments, Arctic sediments, Antarctic permafrost, and high-altitude hypersaline lakes.
While at Maryville College, I continue to collaborate on the NASA Astrobiology Institute ENIGMA project. I am also part of the NSF-funded Arctic Research Coordination Network, Migrations in Harmony, which aims to support a resilient, just, and sustainable Arctic in motion. I’m also an instructor for the Bioinformatics Virtual Coordiatation Network, formed in response to COVID-19 forcing researchers to move their experiments from the lab to the computer.
I received my B.Sc. in Biology (2011) from Tennessee Technological University. I received my M.Sc. in Geoscience (2014) and Ph.D. in Microbiology (2018) from the University of Tennessee, Knoxville. I was a postdoctoral fellow under the co-advisement of Dr. Robert Hazen and Dr. Donato Giovannelli at the Earth and Planets Laboratory at Carnegie Institution for Science in Washington, DC (2019-2020).
My academic journey may have seemed disjointed – going from zoology, to geology, to microbiology. Independently, each of these fields do in fact use very different tools and have unique perspectives to offer. My inexhaustible curiously about nature and our place in space drove me to each of these fields. I’m a interdisciplinarian and understand that the marriage of knowledge gained from each discipline leads us to answer bigger questions about our universe than each discipline could answer alone.
I combine my background in geoscience with a diverse toolkit of novel molecular methods, sequencing analysis, bioinformatics tools, and imaging techniques to delve into the interactions between the biosphere and geosphere that make life thrive in some of the harshest, uninhabitable environments. By combining results from wet-lab and in silico experiments, my work provides a holistic understanding of microbial activity in systems characterized by different geochemical regimes. Clues into how life shaped Earth’s environments and vice versa are hypothesized to be written in the DNA of ancient microbial lineages and the rock record. It’s my job to uncover these clues, and unlock the secrets to how life can perhaps evolve on other planets. My field sites include the western coast of Svalbard, Antarctic permafrost, hypersaline lakes in the high Andes mountains and hot springs in the Andean Altiplano.
I am large supporter of science communication - read my blog post about it here. I believe in open science and the removal of paywalls between science and the people. I try to be as transparent as possible with my research by uploading all of my code, protocols, and data to GitHub and appropriate public data repositories.
Despite many programs, grants, and workshops aimed at increasing recruitment and retention of people of color in STEM fields, representation of scholars of color is woefully lacking. Dismantling the centries-old system that allows this to continue requires concerted and unapologetic efforts to decolonize science. This task falls on administrators, granting agencies, educators, and professional societies.
As a STEM professional, I believe building my toolkit of allyship is an integral part of my job. Throughout my academic pursuits, I have been actively involved in numerous organizations and outreach programs to further the inclusion of women and minoritized students in STEM. I founded the Knoxville chapter of 500 Women Scientists in 2017 and through this, we provide scientific programming to young scholars of color in a partnership with East Tennessee Freedom Schools. In the wake of the devastating hurricane Maria in 2017, I organized a local science salon to raise money for researchers in hard-hit Puerto Rico. I was recognized as an extraordinary scientist advocate from the Union of Concerned Scientists for these efforts and have continued to place high priority on mentorship and outreach in my career.
Selected resource compilations:
Image credit: Dr. Sarah Tuttle
I am grateful for past and present funding from the Deep Carbon Observatory, NASA Astrobiology Institute, C-DEBI, the Explorer’s Club, the Society for Sedimentary Geology, the Society for Organic Petrology, and the Geological Society of America.
I just learned that I am a priority invitee to the NASA Ocean Worlds Workshop happening in October. NASA is interested in understanding where we should focus our efforts in terms of terrestrial sites on Earth as analogs of Ocean Worlds capable of hosting life outside our planet.10 August, 2022
Another summer, another awesome Freedom School experience! Huge thanks to MC interns Parker Owens and Lillian McGinnis for leading the young scholars in their experiments, data collection, and final presentations!21 March, 2022
Just got back from the field! It felt good to get out there again. This time, we sampled hot springs in Chile! I was able to sample a few sites in Antofagasta and around San Pedro de Atacama. I cannot wait to start analyzing the data!2 Februrary, 2022
Recognition is hard won but so appreciated. I received the 'Best Editorial Member' Award from ISME Journal! This comes with a publication voucher, which means I really need to get this paper I've been working on out the door! Ha1 October, 2021
Ari's recorded talk is now on the ACA's webpage! Woohoo! So proud. Listen to her talk here