Theresa Crimmins

Associate Professor, Phenology

Director, USA National Phenology Network

Arid Lands


Theresa Crimmins directs the USA National Phenology Network and has been a part of the organization since 2007. In her role with the Network, Theresa supports an amazing team and works enthusiastically to support the growth and use of phenology data and resources curated by the USA-NPN, involvement in Nature’s Notebookand a broader appreciation of phenology among scientists and non-scientists alike.

Theresa is an Associate Professor in the School of Natural Resources and the Environment at the University of Arizona and has published over 70 peer-reviewed articles and book chapters in journals including NatureGeophysical Research Letters, Global Change Biology, and Journal of Ecology. Her writing has also appeared in Scientific American, The Hill, and the Arizona Daily Star, and she has appeared in the PBS productions SciGirls and American Spring Live as well as on NPR and The Weather Channel. Theresa is an author on the Ecosystems and Biodiversity chapter of the Fifth National Climate Assessment, is a member of the inaugural cohort of NEON Ambassadors, and is a Fellow of the Linnean Society. She also currently serves on the editorial board for Ecosphere. In 2018, Theresa received the Alumni Achievement Award from the Department of Geography as well as the Globally-Engaged Pillar Award from the College of Arts and Sciences at Western Michigan. In 2022, she was recognized by the University of Arizona as a Woman of Impact.


  • RNR150

Theresa is a faculty co-lead of the Integrated Climate Research: Ecosystems, Water, and Weather (ICREWW) Vertically-Integrated Project. She mentors undergraduate and graduate students in phenology-related research projects.


  • Ph.D., 2005, School of Renewable Natural Resources, University of Arizona, Tucson, AZ
  • M.A., 1999, Geography, Western Michigan University, Kalamazoo, MI
  • B.S., 1997, Biological Sciences, Western Michigan University, Kalamazoo, MI