Stephen C. Hart
Professor of Ecology; Sierra Nevada Research Institute
SNRI - Sierra Nevada Research Institute
Hart's SNRI page
Professor of Ecology; School of Natural Sciences
UC Merced - University of California, Merced
Ph.D., University of California, Berkeley, 1990
Terrestrial Ecosystem and Microbial Ecology. Current research projects include: impact of climate change on Sierra Nevada Ecosystems, biogeochemical changes during ecosystem development, influence of invasive plants on soil ecological interactions in grassland ecosystems, fire ecology of forest ecosystems, and ecological genetics of foundation plant species.
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CZO Publications
Papers/Books
2019
Ecological and genomic attributes of novel bacterial taxa that thrive in subsurface soil horizons. Brewer, Tess E., Emma L. Aronson, Keshav Arogyaswamy, Sharon A. Billings, Jon K. Botthoff, Ashley N. Campbell, Nicholas C. Dove, Dawson Fairbanks, Rachel E. Gallery, Stephen C. Hart, Jason Kaye, Gary King, Geoffrey Logan, Kathleen A. Lohse, Mia R. Maltz, Emilio Mayorga, Caitlin O’Neill, Sarah M. Owens, Aaron Packman, Jennifer Pett-Ridge, Alain F. Plante, Daniel D. Richter, Whendee L. Silver, Wendy H. Yang, Noah Fierer (2019): mBio Oct 2019, 10 (5) e01318-19 Cross-CZO National
2019
Fight or Flight? Tradeoffs Between Drought Defense and Reproduction in Conifers. LAUDER, J.D. E. V. MORAN, S. J. HART (2019): Tree Physiology
2018
Quantifying the legacy of snowmelt timing on soil greenhouse gas emissions in a seasonally dry montane forest. BLANKINSHIP, J.C., E.P. MCCORKLE, M.W. MEADOWS, S.C. HART (2018): Global Change Biology
2018
Subsurface plant-accessible water in mountain ecosystems with a Mediterranean climate. Klos, P. Z.; Goulden, M.; Riebe, C. S.; Tague, C.; O’geen, A. T.; Flinchum, B. A.; Safeeq, M.; Conklin, M. H.; Hart, S. C.; Berhe, A. A.; Hartsough, P. C.; Holbrook, S.; Bales R. C.; (2018): Hydrological Processes: 10.1002/wat2.1277
2018
Stabilization Mechanisms and Decomposition Potential of Eroded Soil Organic Matter Pools in Temperate Forests of the Sierra Nevada, California. Stacy, E.M.; Berhe, A.A.; Hunsaker, C.T.; Johnson, D.W.; Meding, S.M.; Hart, S.C. (2018): Journal of Geophysical Research: Biogeosciences, 124
2017
Dust outpaces bedrock in nutrient supply to montane forest ecosystems. Aciego, S.M.; Riebe, C.S.; Hart, S.C.; Blakowski, M.A.; Carey, C.J.; Aarons, S.M.; Dove, N.C.; Botthoff, J.K.; Sims, K.W.; Aronson, E.L. (2017): Nature Communications
2016
Microbial community structure of subalpine snow in the Sierra Nevada, California. Carey, C.J., S.C. Hart, S.M. Aciego, C.S. Riebe, M.A. Blakowski, E.L. Aronson (2016): Arctic, Antarctic, and Alpine Research. 48(4):685-701. 2016
2016
Tracing the Source of Soil Organic Matter Eroded from Temperate Forest Catchments Using Carbon and Nitrogen Isotopes. McCorkle, E.P., Berhe, A.A., Hunsaker, C.T., Johnson, D.W., McFarlane, K.J., Fogel, M.L., Hart, S.C (2016): Geology.
2015
Soil carbon and nitrogen erosion in forested catchments: implications for erosion-induced terrestrial carbon sequestration. Stacy, E., Hart, S.C., Hunsaker, C.T., Johnson, D.W., Berhe, A.A. (2015): Biogeosciences, 12, 4861-4874
2014
Snowmelt timing alters shallow but not deep soil moisture in the Sierra Nevada . Blankinship, J.C., Meadows, M.W., Lucas, R.G., and Hart, S.C. (2014): Water Resources Research.
2012
Consequences of manipulated snow on soil gaseous emission and N retention in the growing season: a meta-analysis. Blankinship, J.C., Hart, S.C. (2012): Ecosphere 3(1).
Papers and books that explicitly acknowledge a CZO grant are highlighted in PALE ORANGE.
Other CZO Publications
2017
Predicting Plant-Accessible Water in the Critical Zone: Mountain Ecosystems in a Mediterranean Climate. Klos, P. Z.; Goulden, M.; Riebe, C. S.; Tague, C.; O’geen, A. T.; Flinchum, B. A.; Safeeq, M.; Conklin, M. H.; Hart, S. C.; Berhe, A. A.; Hartsough, P. C.; Holbrook, S.; Bales R. C.; (2017): Fall Meeting, American Geophysical Union, December 2017. Abstract H23H-1769.
2016
Fire reduces fungal species richness and mycorrhizal colonization: A meta-analysis. Dove, N., Hart, S. (2016): ESA Annual Meeting 2016
2016
Towering trees have big effects on miniscule microbes: The influence of giant sequoia (Sequoiadendron giganteum) on underlying soil microbial communities. Hart, S. C., Carey, C., Glassman, S., Chung, J., Bruns, T., Aronson, E., (2016): ESA Annual Meeting 2016
2016
Anthropogenic Disturbance of Montane Meadows May Cause Substantial Loss of Soil Carbon to the Atmosphere. Reed, C.C.; Sullivan, B.W.; Hart, S.C.; Drew, M.; Merrill, A. (2016): Fall Meeting, American Geophysical Union, December 2016. Abstract B21I-0545.
2015
Aeolian transported and deposited microbial communities differ along an elevation gradient in the Southern Sierra CZO. Aronson, E., Riebe, C.S., Aciego, S., Blakowski, M., Hart, S.C., Carey, C. (2015): Ecology Society of America Annual Meeting. Baltimore, Maryland.
2015
Aeolian and soil microbial communities differ at multiple elevations in the Southern Sierra CZO. Aronson, E.L., Carey, C., Riebe, C., Aciego, S., Blakowski, M., Hart, S.C. (2015): Soil Ecology Society Biennial Meeting. Colorado Springs, Colorado
2015
Southern Sierra Critical Zone Observatory: 2014-2015 Annual Report to National Science Foundation. Bales, R. (2015): NSF Award 1331939
2015
The role pf elevation and time in structuring soil microbial communities in the Sierra Nevada, California . Carey, C.J., Hart, S.C, Riebe, C.S., Aciego, S., Blakowski, M., Aronson, E. (2015): Ecology Society of America Annual Meeting. Baltimore, Maryland
2015
Tools and perspectives for a unified approach to understanding microbial ecology in the critical zone. Gallery R., Aronson E., Fairbanks D., Murphy M., Rich V., Hart S. (2015): Abstract EP31A-0985 presented at 2015 Fall Meeting, AGU, San Francisco, CA, 14-18 Dec. Cross-CZO
2015
The Median Isn’t the Message: Elucidating Nutrient Hot spots and Hot Moments in a Sierra Nevada Forest Soil. Hart, S., *Barnes, M., Johnson, D., Meadows, M. (2015): B22D Microbial Controls of Biogeochemical Cycling II, presented at 2015 Fall Meeting, AGU, San Francisco, CA, 14-18 Dec.
2014
Altitudinal contrasts in drought-driven aeolian microbial inputs to montane soil ecology: impacts of a 500year drought in the Sierra Nevada, California. Aronson, E., Carey, C., Riebe, C., Aciego, S., Hart, S. (2014): AGU Fall Meeting
2014
Southern Sierra Critical Zone Observatory: 2013-2014 Annual Report to National Science Foundation. Bales, R. (2014): NSF Award 1331939
2014
Composition and mean residence time of soil organic matter eroded from temperate, forested catchments: implications for erosion-induced carbon sequestration. Berhe, A.A., McCorkle, E., Stacy, E., Hart, S., Hunsaker, C., Johnson, D (2014): AGU Fall Meeting
2013
Southern Sierra Critical Zone Observatory: 2007-2013 Final Report to National Science Foundation. Bales, R. (2013): NSF Award 0725097
2013
Southern Sierra Critical Zone Observatory: 2012-2013 Annual Report to National Science Foundation. Bales, R. (2013): NSF Award 1239521
2013
Using stable isotopes to determine sources of eroded carbon in low-order Sierra Nevada catchments. McCorkle, E.P., A.A. Berhe, C.T. Hunsaker, M.L. Fogel, and S.C. Hart (2013): American Geophysical Union, Fall Meeting 2013, abstract #B13G-0604
2013
Decomposability of organic matter eroded from eight low-order catchments. Stacy, E.M., A.A. Berhe, D.W. Johnson, C.T. Hunsaker, S.C. Hart. (2013): GSA 109th Cordilleran Section Meeting
2012
Southern Sierra Critical Zone Observatory: 2011-2012 Annual Report to National Science Foundation. Bales, R. (2012): NSF Award 0725097
2012
Erosion of bulk and pyrogenic C from upland forested Sierra Nevada ecosystems (Invited). Berhe, A.A., Stacy, E.M., McClintock, M., Newman, A., Hart, S.C., Hunsaker, C.T., Johnson, D.W. (2012): Fall meeting, American Geophysical Union, December 2012. Abstract B34C-08.
2012
Lateral redistribution of dissolved vs complexed organic matter with soil. Stacy, E.M., Medding, S.M., Hart, S.C., Hunsaker, C.T., Johnson, D.W., Berhe, A.A. (2012): Fall meeting, American Geophysical Union, December 2012. Abstract B34C-07.
2011
Southern Sierra Critical Zone Observatory: 2010-2011 Annual Report to National Science Foundation . Bales, R. (2011): NSF Award 0725097
2011
Chemical characteristics of sediment eroded from Sierra Nevada headstream catchments. Stacy, E., Hart, S. C., Johnson, D., and Hunsaker, C. T. (2011): : National CZO Program 2011 All Hands Meeting
2011
Mechanisms of soil organic matter stabilization in sediments eroded from small Sierra Nevada catchments . Stacy, E., Hart, S.C., Hunsaker, C.T., Johnson,D., Berhe, A. (2011): Fall meeting, American Geophysical Union, December 2011. Abstract B31G-0382.
2010
Southern Sierra Critical Zone Observatory: 2009-2010 Annual Report to National Science Foundation. Bales, R. (2010): NSF Award 0725097
2009
Southern Sierra Critical Zone Observatory: 2008-2009 Annual Report to National Science Foundation. Bales, R. (2009): NSF Award 0725097
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News
CZNews: Spring 2018
27 Apr 2018 - CZO Newsletter CZNews: Spring 2018
Dr. Stephen Hart Honored as 2018 Fellow of Ecological Society of America
03 Apr 2018 - The Ecological Society of America named SSCZO investigator Dr. Stephen Hart an ESA Fellow, a lifetime career award.
New SSCZO comic artfully communicates research
19 Jul 2017 - Wonder what soils and sponges have in common? Or why some trees in the Sierra Nevada are dying while others are surviving? Find out in our new comic.
Gobi Desert Dust Helps Sustain California’s Sierra Nevada
28 Mar 2017 - A team of researchers found that dust provides a much greater amount of nutrients to vegetation in the Sierra Nevada than previously thought.
NSF: Dust contributes valuable nutrients to Sierra Nevada forest ecosystems
28 Mar 2017 - NSF Press Release: New research finding provides insight into role dust may play as ecosystems change
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