Still, Chris

Position Type: 
Job Title: 
Associate Professor
Forest Ecosystems & Society
Office Location: 

326 Richardson Hall

Phone Number: 
(541) 737-4086
Postdoctoral research: University of California, Berkeley and National Center for Atmospheric Research
Ph.D., Biological Sciences, Stanford University
B.S., Biochemistry, Colorado State University
Research Areas: 
  • Forest, Wildlife and Landscape Ecology
  • Genetics and Physiology
  • Soil-Plant-Atmosphere Continuum
Research Interests: 
  • Biogeography
  • Ecophysiology
  • Ecosystem Ecology
My research is focused on thermal imaging of terrestrial ecosystems, on the role of clouds in the ecological structure and function of forests, on the global biogeography and biogeochemistry of C4 grasses, and on the isotopic composition of atmospheric CO2 and linkages between the carbon and water cycles at a range of spatial and temporal scales.


Graduate Major Advisor
Graduate Students: 
Courses Taught: 
FES 595
Ecosystem Processes: Models and Measurements
FES 505/605
Global Forest Ecology and Climatology
FES 561
Woody Plant Ecophysiology
FES 399
Scientific Methods for Analyzing Natural Resource Problems
Selected Publications: 
  1. Pau, S., Detto, M., Kim, Y., and C.J. Still. 2018. Tropical forest temperature thresholds for gross primary productivity. Ecosphere 9 (7), e02311.
  2. Emery, N.C., D'Antonio, C.M., and C.J. Still. 2018. Fog and live fuel moisture in coastal California shrublands. Ecosphere 9 (4).
  3. Kim, Y., Still, C.J., Roberts, D.A., and M.L. Goulden. 2018. Thermal infrared imaging of conifer leaf temperatures: Comparison to thermocouple measurements and assessment of environmental influences. Agricultural and Forest Meteorology 248, 361-371
  4. Greer, B. T., Still, C., Cullinan, G. L., Brooks, J. R., & Meinzer, F. C. 2017. Polyploidy influences plant–environment interactions in quaking aspen (Populus tremuloides Michx.). Tree Physiology, 1-11.
  5. Baguskas, S.A., Still, C.J., Fischer, D.T., D’Antonio, C.M., and J.Y. King. 2016. Coastal fog during summer drought improves the water status of sapling trees more than adult trees in a California pine forest. Oecologia, DOI: 10.1007/s00442-016-3556-y.
  6. Greer, B. Still, C.J., Tague, C., Roberts, D., and G. Howe. 2016. Populations of aspen (Populus tremuloides Michx.) with different evolutionary histories differ in their climate occupancy. Ecology and Evolution, DOI: 10.1002/ece3.2102.
  7. Williams, A.P., Schwartz, R.E., Iacobellis, S., Seager, R., Cook, B.I., Still, C.J., Husak, G. and J. Michaelsen. 2015. Urbanization causes increased cloud-base height and decreased fog in coastal southern California. Geophysical Research Letters, DOI: 10.1002/2015GL063266
  8. Still, C.J., Pau, S. and E.J. Edwards. 2014. Land surface skin temperature captures thermal environments of C3 and C4 grasses. Global Ecology & Biogeography, DOI:10.1111/geb.12121.
  9. Still, C.J., Riley, W.J., Biraud, S.C., Noone, D.C., Buenning, N.H., Randerson J.T., Torn, M.S., Welker, J., White, J.W.C., Vachon, R., Farquhar, G.D., and J.A. Berry. 2009. The influence of clouds and diffuse radiation on ecosystem-atmosphere CO2 and CO18O exchanges. Journal Geophysical Research-Biogeosciences 114, G01018, doi:10.1029/2007JG000675.
  10. Carbone, M.S., Still, C.J., Ambrose, A.M., Dawson, T.E., Williams, A.P., Boot, Schaeffer, S.M. and J.P. Schimel. 2011. Seasonal and episodic moisture controls on plant and microbial contributions to soil respiration. Oecologia. 167:265–278 DOI 10.1007/s00442-011-1975-3.
  11. Still, C.J., Berry, J.A., Ribas-Carbo, M. and B.R. Helliker. 2003. The contribution of C3 and C4 plants to the carbon cycle of a tallgrass prairie: An isotopic approach. Oecologia 136, 347-359.
  12. Still, C.J., Randerson, J.T. and I.Y. Fung. 2004. Large-scale plant light-use efficiency inferred from the seasonal cycle of atmospheric CO2. Global Change Biology, 10(8), 1240-1252.
  13. Edwards, E.J. and C.J. Still. 2008. Climate, phylogeny, and the ecological distribution of C4 grasses. Ecology Letters 11, 266–276 doi: 10.1111/j.1461-0248.2007.01144.x.
  14. Still, C.J., Berry, J.A., Collatz, G.J. and R.S. DeFries. 2003. The global distribution of C3 and C4 vegetation: carbon cycle implications. Global Biogeochemical Cycles 17(1), 1006.
  15. Fischer, D.T., Williams, A.P. and C.J. Still. 2009. Significance of summer overcast and fog to drought stress and ecological functioning of coastal California endemic species. Journal of Biogeography doi:10.1111/j.13652699.2008.02025.x.
  16. Williams, A.P., Allen, C.D., Millar, C.I., Swetnam, T.W., Michaelsen, J., Still, C.J., and S.W. Leavitt. 2010. Forest responses to increasing aridity and warmth in the southwestern United States. Proceedings of the National Academy of Sciences USA doi/10.1073/pnas.0914211107.
  17. Riley, W.J., Still, C.J., Helliker, B.R., Ribas-Carbo, M., and J.A. Berry. 2003. 18O composition of CO2 and H2O ecosystem pools and fluxes: Simulations and comparisons to measurements. Global Change Biology 9, 1567-1581.
  18. Hoag, K.J., Still, C.J., Fung, I.Y., and K.A. Boering. 2005. Triple oxygen isotope composition of tropospheric carbon dioxide as a tracer of terrestrial gross carbon fluxes. Geophysical Research Letters 32 (2), L02802.