Portrait of Hallie Adams
PhD Student
• Ecohydrology • Forest ecology • Tree physiology • Catchment ecohydrology

Visit the Ecohydrology Lab
Advisor: Holly Barnard


My research focuses on the response of tree growth and physiology to variable climate conditions and topographic complexity (surface and subsurface) in Colorado semi-arid forests.

Specifically, I look at how climate, drought, and surface and subsurface topographic variability influences physiological function of abundant Colorado semi-arid species and how this knowledge can be used to predict the response of common Colorado tree species to climate change.


  • MA: University of Colorado Boulder, 2014
  • BA: Western Washington University, 2012


  • Rich Herbert Memorial Scholarship, American Water Resources Association - Colorado, 2020
  • Jennifer Dinaburg Memorial Research Award, University of Colorado Dept of Geography, 2020
  • NSF Graduate Research Fellowship (GRFP), National Science Foundation, 2019
  • NSF GRFP Honorable Mention, National Science Foundation, 2012


Christensen, L., Adams, H., Tai, X., Barnard, H. R., and Brooks, P. D. 2021: Increasing plant water stress and decreasing summer streamflow in response to a warmer and wetter climate in seasonally snow-covered forests. Ecohydrology, 14(1): e2256. DOI: 10.1002/eco.2256

Berryman, E., Barnard, H. R., Adams, H., Burns, M., Gallo, E., and Brooks, P., 2015: Complex terrain alters temperature and moisture limitations of forest soil respiration across a semiarid to subalpine gradient. Journal of Geophysical Research—Biogeosciences, 120(4): 707-723. DOI: 10.1002/2014JG002802

Adams, H., Barnard, H. R., and Loomis, A. K., 2014: Topography alters tree growth–climate relationships in a semi-arid forested catchment. Ecosphere, 5(11): 1-16. DOI: 10.1890/ES14-00296.1

Adams, H., 2014: Linking topography, hydrology, climate, and ecology in semi-arid forests: Within catchment annual tree growth and water use efficiency. University of Colorado Boulder, MA thesis.