We study all things mutualistic. Projects in the lab focus on ecological, evolutionary, and behavioral questions about mutualism. We’re particularly interested in coevolutionary dynamics, community organization, context dependency, climate change effects, and the continuum from cooperation to conflict. We are linked more by a common conceptual context rather than any single type of interaction or group of organisms.

website updated 28 April 2014



Dr. Judie Bronstein

University Distinguished Professor

Dept. Ecology & Evolutionary Biology

University of Arizona, Tucson, AZ

Office: Biological Sciences West 418

Laboratory: Biological Sciences West 409

judieb [at] email.arizona.edu – 520.621.3534

Lab film: http://www.arizona.edu/features/life-science



  1. +Judie has a new paper in Ecology Letters!

  1. +Hooray for a round of Springtime awards!

Congratulations to Sarah for receiving a Carson Scholarship, Kelsey for a Galileo Circle Scholarship, and Paul for the UA College of Science Excellence in Research Award and the Darwin-Wallace Biodiversity Scholarship!

    – April 2014

  1. +Paul and Amy have a new paper in PNAS!

    –  March 2014

  1. +Spring 2014 Lab meetings: Mondays from 12–2 in BioSciences West Rm. 409. View the schedule here.

  1. +EEBCoffee Hour: Mondays from 11–12 in BioSciences West Rm. 409.

  1. +Judie and collaborator Rebecca Irwin of Dartmouth University have been awarded an NSF grant to study secondary nectar robbing!

  1. + Manzanita is blooming and pollinators are buzzing at our field sites on Mt. Lemmon!

        – January 2014

News from the past:

  1. +We are pleased to welcome new Post-doc Chris Johnson from UCLA!

  1. +New publication from the lab in Ecology & Evolution!

        –04 September 2013

  1. +Check out the film about the lab! http://www.arizona.edu/features/life-science

  1. +After a highly anticipated field season, the manzanita flowers have finally started to slow down.  As a lab, we’ve collected heaps of information over the last several weeks ranging from nectar robbing and buzz pollination, to the phenology of bees and flowers, to the composition of the pollinator community.

  1. +Sarah has been awarded an NSF Graduate Research Fellowship Award!  Hooray for Sarah!

        –02 April 2013.

  1. + The Manzanita Field Season begins!  Although it is still cold up on Mount Lemmon and there is plenty of snow, flower buds of our manzanita plants are ready to bloom soon.  For some of us, measures of flowering (and bee) phenology are already underway.

      –12 January 2013.

  1. +Welcome to new lab members! We have three new lab members joining us in fall 2012. Kelsey Yule and Sarah Richman are new EEB PhD students. Jessie Barker is a new PERT postdoctoral fellow joining us from Cornell who is interested in the dynamics of cooperation and conflict within mutualisms. We’re glad you’re joining us!

Field site at the Desert Laboratory on Tumamoc Hill, Tucson, AZ.

Datura field site in Tucson, AZ (Santa Catalina Mountains in the background).  Photo: Eran Levin.

Field site in the Santa Catalina Mountains, just outside of Tucson, AZ.  From mid-January to March (depending on the year) manzanita (Arctostaphylos pungens) gets hit hard by floral antagonists that set the stage for secondary robbing.

Bronstein Laboratory Members 2013–2014.

Back row, left to right: Clare Aslan, Alex Von Stein, Nicole Rafferty, Emily McCall, Andy McCall, Judie Bronstein, Jessie Barker, Amy Iler, and Christopher Johnson.

Front row, left to right: Paul CaraDonna, Gordon Smith, Kelsey Yule, Heather Briggs, Sarah Richman.