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Kartzinel Lab​ News

Alumni Spotlight: Bethan Littleford-Colquhoun

1/27/2026

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Alumni Spotlight: Bethan Littleford-Colquhoun (Postdoc 2020-2025)

Faculty member in Microbiomics, University of Bath (UK). Former NSF Yellowstone Project lead postdoc + Brown Postdoctoral Excellence Award recipient.
Bethan Littleford-Colquhoun: Position Postdoctoral Research Associate Years 2020-2025 Awards Postdoctoral Excellence Award Prize Fellowship Next steps Faculty member in microbiomics at The University of Bath (UK)
Dr. Bethan Littleford‑Colquhoun was a postdoctoral researcher in the Kartzinel Lab (2020–2025) and a key driver of our NSF-funded Yellowstone wildlife research program in collaboration with the National Park Service. Her work uses dietary DNA metabarcoding and microbiome ecology to understand how wild herbivores respond to seasonal change and migration. She is now a faculty member in Microbiomics at the University of Bath.
  • Faculty website: University of Bath
  • In the news: Researchers propose new model for herbivore diets in Yellowstone National Park
  • Post from the lab: Beth wins 2023 Postdoctoral Excellence Award

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Story behind the science: Yellowstone Wildlife Diets

9/8/2025

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Story behind the science: Yellowstone wildlife diets

Rethinking how we classify animals based on what they eat—and what it means for wildlife management
An article by science journalist Livi Milloway chronicles an "ah-ha" moment we had in our Yellowstone National Park research project. The story published in The Wildlife Society Bulletin, titled An herbivore by any other name, unpacks how Hannah Hoff's recent paper in PNAS challenges the status quo when it comes to how scientists study and understand wildlife diets. 

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Hoff awarded Blavatnik Family Graduate Fellowship in Biology and Medicine

8/6/2025

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Hannah Hoff awarded Blavatnik Family Graduate Fellowship

Hannah Hoff, PhD candidate, wins Blavatnik Fellowship

Outstanding scholarship & innovation in the life sciences.
Hannah Hoff, PhD candidate in the lab, has accepted a Blavatnik Family Graduate Fellowship in Biology & Medicine at Brown University. This is a highly competitive and well-deserved honor. Hannah has helped lead our work in Yellowstone National Park since 2021.

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Apportionment of dietary diversity in wildlife

7/15/2025

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Research highlight: Apportionment of Dietary Diversity in Wildlife published in PNAS (Hannah Hoff et al.)

Led by Hannah Hoff, in collaboration with the National Park Service and the Brown University Herbarium, the lab just published a blockbuster paper that summarizes, critiques, and enhances how ecologists tend to talk about what wildlife eat. There are some surprising and potentially sensitive elements to the story—both for how we monitor and manage wildlife populations and for how we address our implicit biases when observing and reporting on wildlife as scientists.
Related content:
  • Paper published in PNAS
  • Hannah wins prestigious award
  • Code to replicate analyses
  • Results find attention in the press

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Kartzinel Interview with Mongabay about DNA barcoding

6/27/2025

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Interview: DNA barcoding and conservation (Mongabay)

DNA sequencing to meet global biodiversity goals: Interview with Tyler Kartzinel
Tyler sat down for an interview with Abhishyant Kidangoor of Mongabay to discuss our recent Mini Review in Molecular Ecology, entitled Global Availability of Plant DNA Barcodes as Genomic Resources to Support Basic and Policy-Relevant Biodiversity Research.

You can read our conversation here at Mongabay. It covers topics that are among the most important for ensuring the reliability of DNA-based biodiversity research, including equitable access to the benefits arising from this technology and the reputations of all who use it.

The work was also highlighted in Spanish by El Mostrador: Código de barras de plantas: herramienta genética clave que busca ser fortalecida en el sur global

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What fuels wildlife migrations across Yellowstone?

9/19/2024

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Research highlight: what fuels wildlife migrations across Yellowstone?

A new paper from the lab was led by postdoc Bethan Littleford-Colquhoun and published in Royal Society Open Science: "Body size modulates the extent of seasonal diet switching by large mammalian herbivores in Yellowstone National Park."
The paper is free to read and download. You can find it posted together with all our papers on the Publications page.

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Lab in action at Yellowstone

8/3/2022

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Lab in action at Yellowstone National Park

PictureBeth, Maddy, and Hannah at the north entrance to Yellowstone in Gardiner -- weeks after the 2022 floods (and moments after meeting a Prairie Rattlesnake at the Arch)!

It feels good to have more of the lab getting back into the swing of fieldwork after the worst years of the early pandemic! The lab has always maintained some field activity throughout the pandemic. Ezequiel Vanderhoeven had been working remote from field sites across Argentina; Robert Ang'ila and Peter Lokeny had been keeping active at Mpala in Kenya; Colin Donihue had led  the lizard team in field and lab studies across New England; Amanda Lyons led the terrapin conservation genomics team around the northeastern United States. But a lot of us had to cut back or go it alone more than we would have liked. The tide finally began to turn in 2022, though!

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Dr. Tyler Kartzinel
Department of Ecology, Evolution, and Organismal Biology
Institute at Brown for Environment and Society
Brown University

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  • Home
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