CWEST, Center for Water, Earth Science, and Technology
PhD, Massachusetts Institute of Technology, 1979
Research focuses on interactions between hydrologic, chemical and biological processes in controlling the dynamics in aquatic ecosystems. This research is carried out through field-scale experiments, modeling, and laboratory characterization of natural substrates. Main field sites are located in the Rocky Mountains and in the Transantarctic Mountains, and include pristine and stressed ecosystems, such as acid mine drainage influences mountain streams. Conducts research focusing on interactions between freshwater biota, trace metals, and natural organic material in diverse freshwater environments, including lakes and streams in the Colorado Rocky Mountains, and in the McMurdo Dry Valleys in Antarctica. Develops interactions with state and local groups involved in mine drainage and watershed issues in the Rocky Mountains. A co-principal investigator in the McMurdo Dry Valley LTER and in the Niwot Ridge LTER.
Hypothesis testing in hydrology: A view from the field: The value of hydrologic hypotheses in designing field studies and interpreting the results to advance hydrology . McKnight, DM (2017): Water Resources Research 53: 1779-1783
Concentration-discharge relationships during an extreme event: Contrasting behavior of solutes and changes to chemical quality of dissolved organic material in the Boulder Creek Watershed during the September 2013 flood. Rue, G.P., Rock, N. D., Gabor, R. S., Pitlick, J., Tfaily, M., McKnight, D. M. (2017): Water Resources Research
Variation of organic matter quantity and quality in streams at Critical Zone Observatory watersheds. Miller, Matthew P., Boyer, Elizabeth W., McKnight, Diane M., Brown, Michael G., Gabor, Rachel S., Hunsaker, Carolyn T., Iavorivska, Lidiia, Inamdar, Shreeram, Johnson, Dale W., Kaplan, Louis A., Lin, Henry, McDowell, William H., Perdrial, Julia N. (2016): Water Resources Research, 52 (10): 8202–8216 Cross-CZO
Patterns of hydrologic connectivity in the McMurdo Dry Valleys, Antarctica: A synthesis of 20 years of hydrologic data. Wlostowski, A., Gooseff, M., McKnight, D.M., Jaros, C., Lyons, W. B. (2016): Hydrological Processes, 30(17): 2958-2975 National
The river as a chemostat: Fresh perspectives on dissolved organic matter flowing down the river continuum . Creed, I. F., McKnight, D. M., Pellerin, B. A., Green, M. B., Bergamaschi, B. A., Aiken, G. R., Burns, D. A., Findlay, S. E. G., Shanley, J. B., Striegl, R. G. (2015): Canadian Journal of Fisheries and Aquatic Sciences 72(8):1272-1285
Hydrodynamic control of benthic mats of Didymosphenia geminata at the reach scale. Cullis, J., McKnight, M. and Spaulding, S. (2015): Canadian Journal of Fisheries and Aquatic Sciences
Influence of Leaching Solution and Catchment Location on the Fluorescence of Water-Soluble Organic Matter. Gabor, R. S., Burns, M. A., Lee, R. H., Elg, J. B., Kemper, C. J., Barnard, H. R, and McKnight, D. M. (2015): Environmental Science & Technology Article ASAP
Diel flow pulses drive particulate organic matter transport from microbial mats in a glacial meltwater stream in the McMurdo Dry Valleys. Cullis, J.D.S., Stanish, L.F., and McKnight, D.M. (2014): Water Resources Research 50: 86-97
Fluorescence Indices and their Interpretation . Gabor, R., A Baker, D. McKnight, *M. Miller (2014): In Aquatic Organic Matter Fluorescence, Coble, P.G., Lead, J., Baker, A., Reynolds, D.M., and Spencer, R.G.M., eds., Cambridge University Press , p. 303-339, isbn: 9781139897907
From the litter layer to the saprolite: Chemical changes in water-soluble soil organic matter and their correlation to microbial community composition. Gabor, R., Eilers, K., McKnight, D., Fierer, N., Andersond, S. (2014): Soil Biology & Biochemistry 68 (2014) 166e176
Shear removal function for the nuisance stalk forming diatom Didymosphenia geminate. Cullis J.D.S., Crimaldi J.P. and McKnight D.M. (2013): L&O: Environments and Fluids 3: 256-268
Comparison of seasonal changes in fluorescent dissolved organic matter among aquatic lake and stream sites in the Green Lakes Valley. Miller, M.P., McKnight, D.M. (2010): Journal of Geophysical Research-Biogeosciences VOL. 115, G00F12
Production of microbially-derived fulvic acid from photolysis of quinone-containing extracellular products of phytoplankton. Miller M.P., McKnight D.M. and Chapra S.C. (2009): Aquatic Sciences 71(2): 170-178. 2009
Factors controlling streambed coverage of Didymosphenia germinata in two regulated streams in the Colorado Front Range. Miller M.P., McKnight D.M., Cullis J.D., Greene A., Vietti K. and Liptzin D. (2009): Hydrobiologia 630(1):207-218. 2009
A model of degradation and production of three pools of dissolved organic matter in an alpine lake. Miller, M.P., McKinight, D.M., Chpara, S.C., Williams, M.W. (2009): Limnology and Oceanography 54(6), 22-1-2227. 2009.
Papers and books that explicitly acknowledge a CZO grant are highlighted in PALE ORANGE.
Reconciling stream dissolved organic matter with snowmelt-driven subsurface flowpaths in a montane, headwater catchment (Invited). Barnard H., Burns M., McKnight D., Gabor R., Brooks P. (2014): Abstract H53K-03 presented at 2014 Fall Meeting, AGU, San Francisco, CA, 15-19 Dec. Cross-CZO
Transport and Transformation of Dissolved Organic Matter in Soil Interstitial Water Across Forested, Montane Hillslopes. Burns M.A., McKnight M.D., Gabor R.S., Brooks P.D., Barnard H.R. (2013): Abstract H23F-1340 presented at 2013 Fall Meeting, AGU, San Francisco, CA, 9-13 Dec. Cross-CZO
30 Oct 2017 - Water Resources Research published a new special collection in September 2017 featuring concentration-discharge research from multiple CZOs.
21 Jan 2014 - Rachel Gabor defended her dissertation entitled "A spectroscopic investigation of the chemistry of organic matter during biogeochemical cycling...
01 Dec 2013 - Join the BcCZO and more than 22,000 Earth and space scientists, educators, students, and other leaders in San Francisco, California, 9-13 December,...
19 Sep 2013 - On Monday September 16 2013 Rachel Gabor assembles a small crew to take samples on Boulder creek.
13 Sep 2013 - Investigators and staff rush into action to collect samples and observe impacts