Lab Personnel

PhD Students

Nonno Hasegawa 


Nonno is an evolutionary biologist from Kanagawa, Japan. She earned her bachelor's degree at the University of Guelph in Canada. She became interested in honeybees working as a research assistant at the University of British Columbia and Guelph and later joined OIST as a research intern with the Laurino and Mikheyev units. Her research focuses on the phylogeography and landscape genetics of species interactions in systems such as obligate pitcher plant arthropods and honeybee mites. In her free time, Nonno can be found on a surfboard, shredding waves along the Okinawa coast. 

Rahel Collyer-Hoar

Rahel is an immunologist from Switzerland, where she studied at the University of Bern. For her master's degree, she worked on understanding inhibitory mechanisms of human basophils during allergic reactions. For her PhD thesis, she is focusing on the impact of life history variation on the evolution of immune genes in different populations of Molossid bats. With a keen interest in science communication, she is also building experience in science writing.

Postdocs & Staff Scientists

Dr. Su'ad Yoon

suad.yoon [at]

Su’ad spent her childhood moving between Oregon, South Korea, Saudi Arabia, Yemen, and Nashville, TN. She earned her BS at the University of Tennessee Knoxville working broadly across botany, mycology, chemical ecology, ecosystem ecology, and invasion biology. For her PhD, she worked with Matthew Forister and Angela Smilanich at the University of Nevada, Reno, where she examined how novel host plant use and ecological variation affected immunological function in the butterfly Lycaeides melissa. At OIST, Su'ad works on microbially-mediated trophic interactions in Crotalaria plants. She enjoys playing chess, painting, taking pictures of bugs, and making memes.

Dr. Sam Ross


Sam is a community ecologist from Nottingham, UK. He earned his undergraduate and master’s degrees from the University of Leeds before moving to Trinity College Dublin in Ireland for a PhD on ecological stability. Sam’s work addresses fundamental questions relevant to global environmental change and broadly concerns ecological stability, time series, community dynamics/food webs, and ecoacoustics. In his spare time, Sam can be found cruising around the island on his scooter (scoot scoot!), critiquing convenience store umeshu, or making waves as OIST’s worst DJ.

Dr. Matin Miryeganeh


Matin is a molecular ecologist from Iran with degrees in plant systematics and ecology. She earned her PhD as a MEXT scholar in Japan on the spatial population genetics of the morning glory Ipomoea pes-caprae. She then spent time as a postdoc at the University of Kyoto working on plant scenescence, and later at OIST as a JSPS fellow researching the genomics, transcriptomics, and epigenetics of mangroves' adaptations to environmental stress. As a staff scientist in our unit, Matin is generating draft genomes of Okinawa's native mangroves as well as researching epigenetic questions pertaining to mangroves' evolutionary histories, geographic range limits, and legacies of transient stressors. In her free time, Matin pursues her passion for long-distance running, be it on a treadmill, track, or roads around Onna.

Research Technicians

Alexandro Alonso Sánchez


Alex is a molecular biologist from Oaxaca, Mexico, he studied biology at the University of the Americas Puebla and his masters degree at the University of Leeds. He joined the Institute of Ecology (INECOL) in Mexico as a technician in the Plant Genomics and Transcriptomics lab and was in charge of the sequencing core-lab facility. He’s interested in the molecular interactions of nematodes and insects with plants, including their associated bacterial communities. Outside of the lab, Alex enjoys photography and having coffee with friends.

Katie Saunders


Katie is from Texas and earned her bachelor's degree in biology from the University of Texas at Austin. She studied mating behavior of horeshoe crabs (Limulus polyphemus) for her master's degree at the University of Florida. Katie has since worked in scientific publishing, seabird population monitoring, wild bird rehabilitation, and aquatic ecology research. Her hobbies include baking pies, knitting, and birdwatching. 

Research Interns

Karla López

Karla is a biologist from Mexico City. She completed her degree in Biology at the National Autonomous University of Mexico and worked for Rotoplas as a laboratory technician in water quality testing. Most recently, she has returned to academia working in systems biology and bioinformatics where her interests have led to the development of an R package for metaboloic analysis of metagenomes. During her internship, she is working on the Azolla metagenome project.

Amy Morrell

Amy is a plant biologist from the US currently residing in Okinawa. With industry experience as a plant chemical analyst, Amy is now returning to academia to pursue research on plant ecology and agroecology. As a research intern in our unit, she has been working on a project that investigates the demographic and immune costs/benefits of caterpillar foraging on Crotalaria plants with different levels of rhizobial nodulation. ​

Unit Administrator

Shizuka Kuda


Shizuka hails from Okinawa but has spent time away from the island while studying in Kumamoto, Canada and the U.S. She received a Bachelor’s degree in Business Administration from Washington State University Pullman, and has since worked at the US Naval Hospital in Okinawa, Unum Insurance in Chattanooga, Tennessee, and has worked at OIST for the past 10 years. Outside of the office, Shizuka enjoys performing Hawaiian Hula dance, CrossFit, and is currently learning how to play golf. 


  • Peter Reynolds (rotation student, 2023)
  • Aurika Musiienko (intern, 2023)
  • Helene Bee (intern, 2023)
  • Chii Kojima (intern, 2023)
  • Ethan Rickards (rotation student, 2023)
  • Yong Heng Phua (rotation student, 2023)
  • Noah Locke (rotation student, 2023)
  • Callum Hudson (rotation student, 2022)
  • Camila Rayo (intern, 2022)
  • Arno Hagenbeek (rotation student, 2022)
  • Zhuli Cheng (rotation student, 2021)
  • Mika Takahashi (intern, 2021)