Professor of Integrative Biology, University of California Berkeley
Faculty Director of Blue Oak Ranch Reserve
Director of Center for Stable Isotope Biogeochemistry
As noted at the beginning of my lab group’s home page our research is focused on the interface between plants and their environments with a special emphasis placed on exploring this interface from a functional perspective. Research projects therefore apply the tools from physiological and evolutionary plant ecology, ecosystem science, stable isotope biogeochemistry and remote sensing and modeling towards the study and interpretation of the plant-environment interface. We work across an array of study systems, scales, organisms, and questions that draw upon a variety of empirical and theoretical methods. These are merged with the application of diverse approaches (observations, monitoring, and experimental manipulations) as avenues for improving our understanding of how the ecophysiological characteristics of plants are shaped by and respond to the environments they inhabit.
Digging deeper: what the critical zone perspective adds to the study of plant ecophysiology. Dawson, T.E., Hahm, W.J., & Crutchfield-Peters, K. (2020): New Phytologist 226 (3): 666-671
Low Subsurface Water Storage Capacity Relative to Annual Rainfall Decouples Mediterranean Plant Productivity and Water Use From Rainfall Variability. Hahm, W.J., Dralle, D.N., Rempe, D.M., Bryk, A.B., Thompson, S.E., Dawson, T.E., and Dietrich, W.E. (2019): Geophysical Research Letters
Lithologically Controlled Subsurface Critical Zone Thickness and Water Storage Capacity Determine Regional Plant Community Composition. Hahm, W.J., Rempe, D.M., Dralle, D.N., Dawson, T.E., Lovill, S.M., Bryk, A.B., Bish, D.L., Schieber, J. & Dietrich, W.E. (2019): Water Resources Research 55
Controls on the distribution and resilience of Quercus garryana: ecophysiological evidence of oak's water‐limitation tolerance. Hahm, W.J., Dietrich, W.E., and Dawson, T.E. (2018): Ecosphere 9 (5)
Reviews and syntheses: on the roles trees play in building and plumbing the critical zone. Brantley, Susan L., David M. Eissenstat, Jill A. Marshall, Sarah E. Godsey, Zsuzsanna Balogh-Brunstad, Diana L. Karwan, Shirley A. Papuga, Joshua Roering, Todd E. Dawson, Jaivime Evaristo, Oliver Chadwick, Jeffrey J. McDonnell, Kathleen C. Weathers (2017): Biogeosciences, 14, 5115-5142 Cross-CZO National
Species differences in the seasonality of evergreen tree transpiration in a Mediterranean climate: Analysis of multiyear, half-hourly sap flow observations. Link, P., K. Simonin, H. Maness, J. Oshun, T. Dawson, and I. Fung (2014): Water Resources Research
Vegetation induced changes in the stable isotope composition of near surface humidity . Simonin, K.A., Link, P., Rempe, D., Miller, S., Oshun, J., Bode, C., Dietrich, W.E., Fung, I. and Dawson T.E. (2014): EcoHydrology 7(3): 936-949.
Root functioning modifies seasonal climate. Lee, JE, RS Oliveira, TE Dawson, IY Fung (2005): Proceedings of the National Academy of Sciences of the United States of America, V.102 (49): 17576-17581
Papers and books that explicitly acknowledge a CZO grant are highlighted in PALE ORANGE.
Dry season changes in soil carbon composition: tracking decomposability, mobility, and chemistry over a Mediterranean-type summer. Vaughn, L.S., Santos, F., Wahab, L.M., Berhe, A.A., Dawson, T.E. (2019): American Geophysical Union 2019 Fall Meeting, San Francisco, CA, 9-13 December 2019 Abstract #B33C-08
The influence of Critical Zone structure on runoff paths, seasonal water storage, and ecosystem composition. Hahm, W.J., Dietrich, W.E., Rempe, D.M., Dralle, D., Dawson, T.E., Lovill, S.M., and Bryk, A.B. (2017): American Geophysical Union 2017 Fall Meeting, New Orleans, Louisiana, 11-15 December 2017 Abstract #U13B-37
Dynamic, structured heterogeneity of water isotopes inside hillslopes . Oshun, J., Dietrich, W.E., Dawson, T.E., and Fung, I. (2015): Water Resources Research
The Eel River Critical Zone Observatory: exploring how the critical zone will mediate watershed currencies and ecosystem response in a changing environment. Dietrich, WE, JK Bishop, SM Carlson, ME Power, and S Thompson (2013): NSF Proposal
25 Jun 2019 - Eel River CZO research findings from Hahm et al. 2019 are featured on the UC Berkeley News website.
31 May 2019 - Scientists link vegetation mosaics in California to patterns of weathered bedrock.
27 Apr 2018 - CZO Newsletter CZNews: Spring 2018
02 Mar 2018 - Professor Todd Dawson in the Department of Integrative Biology/Department of Environmental Science, Policy, and Management at the University of...
14 Jan 2016 - CZOs at AGU 2015: Award recipients and agenda
10 Nov 2015 - San Francisco's KQED public television features the Eel River and the Southern Sierra CZOs in a production of QUEST, a science and technology...
16 Jul 2015 - Chris Wong, the Eel River CZO's very own jack-of-all-trades was interviewed by KQED, San Francisico's NPR station, for a video series...
14 Jul 2015 - The Eel River CZO is featured on the Morrison Planetarium show “Habitat Earth” at the California Academy of Sciences. The theme...
17 Mar 2015 - Professor, Integrative Biology and Environmental Science / Policy & Management, University California Berkeley.