Sasha C Reed, Ph.D.
Dr. Sasha Reed is an ecologist focused on understanding how our planet's ecosystems work and what factors determine the services they provide. The study sites and methods Sasha uses are diverse, and with each of her projects she strives to provide scientific information that helps our nation address challenges, solve problems, and maximize opportunities.
Sasha seeks to provide useful information for land managers, policy-makers, and the general public. Sasha uses both basic and applied scientific approaches to improve our understanding of the fundamental controls over ecosystems, to determine how these systems respond to change, and to explore solutions for addressing relevant problems. Sasha works closely with a range of collaborators - including federal agency partners (BLM, NPS, DOE, DoD, BIA, USFS, USFWS) - in designing research studies, conducting information and technology transfer, and performing outreach activities. Some of her primary research interests include understanding how drought and increasing temperatures affect ecosystems, exploring a diversity of energy options for meeting national demand, assessing the consequences of exotic plant invasion and ways to combat them, and establishing novel management options for increased effectiveness and efficiency in restoration and reclamation. Sasha attempts to conduct research that is innovative, collaborative, and useful.
Professional Experience
Research Ecologist, USGS, Southwest Biological Science Center, Moab, UT: May 2008 - present
Research Ecologist, USGS-SCEP Program, Moab, UT: 2005 - 2007 summers only
Fellow, NSF Graduate Research Fellowship: Awarded April 2003; deferred until September 2005-May 2008
Fellow, National Science Foundation IGERT Fellowship, Carbon Climate and Society Initiative (CCSI): August 2003-August 2005.
Education and Certifications
Ph.D. in Biogeochemistry, 2002-2008: University of Colorado at Boulder, Department of Ecology & Evolutionary Biology and Institute of Arctic & Alpine Research (INSTAAR).
B.A. in Organic Chemistry, 1993-1997: Colgate University, Department of Chemistry, Hamilton, NY. Graduated magna cum laude.
Honors and Awards
Joanne Simpson Medal, American Geophysical Union (AGU). September 2024.
Fellow, American Geophysical Union (AGU). August 2024.
Fellow, Ecological Society of America (ESA). April 2024.
Elected Member-At-Large, Ecological Society of America (ESA). August 2020-August 2022.
Ecological Society of America (ESA) Early Career Fellow. March 2016.
Presidential Early Career Award for Scientists and Engineers (PECASE). October 2011.
Star Award, Department of the Interior. October 2010, May 2000.
Graduate Student Research and Creative Works Award, University of Colorado at Boulder. May 2008.
USGS Student Career Experience Program (SCEP) Fellowship. June-August of 2006 & 2007.
Student Policy Award, Ecological Society of America (ESA). September 2006.
AAAS Program for Excellence in Science. August 2006.
Lawrence Award. April 1996.
Phi Ea Sigma University Honor Society Awarded Membership. April 1994-May 1997.
Phi Eta Sigma Aid Committee Selected Board Member. September 1995-May 1997.
Barry Goldwater Award Nominee. November 1994.
Science and Products
Filter Total Items: 18
Filter Total Items: 167
Effects of canopy tree species on belowground biogeochemistry in a lowland wet tropical forest
Tropical rain forests are known for their high biological diversity, but the effects of plant diversity on important ecosystem processes in this biome remain unclear. Interspecies differences in both the demand for nutrients and in foliar and litter nutrient concentrations could drive variations in both the pool sizes and fluxes of important belowground resources, yet our understanding...
Authors
Adrienne B. Keller, Sasha Reed, Alan R. Townsend, Cory C. Cleveland
Changes to dryland rainfall result in rapid moss mortality and altered soil fertility
Arid and semi-arid ecosystems cover ~40% of Earth’s terrestrial surface, but we know little about how climate change will affect these widespread landscapes. Like many drylands, the Colorado Plateau in southwestern United States is predicted to experience elevated temperatures and alterations to the timing and amount of annual precipitation. We used a factorial warming and supplemental...
Authors
Sasha Reed, Kirsten K. Coe, Jed P. Sparks, David C. Housman, Tamara J. Zelikova, Jayne Belnap
Tropical forest carbon balance in a warmer world: a critical review spanning microbial- to ecosystem-scale processes
Tropical forests play a major role in regulating global carbon (C) fluxes and stocks, and even small changes to C cycling in this productive biome could dramatically affect atmospheric carbon dioxide (CO2) concentrations. Temperature is expected to increase over all land surfaces in the future, yet we have a surprisingly poor understanding of how tropical forests will respond to this...
Authors
Tana E. Wood, Molly A. Cavaleri, Sasha Reed
Bioenergy potential of the United States constrained by satellite observations of existing productivity
United States (U.S.) energy policy includes an expectation that bioenergy will be a substantial future energy source. In particular, the Energy Independence and Security Act of 2007 (EISA) aims to increase annual U.S. biofuel (secondary bioenergy) production by more than 3-fold, from 40 to 136 billion liters ethanol, which implies an even larger increase in biomass demand (primary energy...
Authors
W.R. Smith, Cory C. Cleveland, Sasha Reed, Norman W. Miller, Steven W. Running
Bioenergy potential of the United States constrained by satellite observations of existing productivity
Background/Question/Methods Currently, the United States (U.S.) supplies roughly half the world’s biofuel (secondary bioenergy), with the Energy Independence and Security Act of 2007 (EISA) stipulating an additional three-fold increase in annual production by 2022. Implicit in such energy targets is an associated increase in annual biomass demand (primary bioenergy) from roughly 2.9 to 7...
Authors
Sasha Reed, William K. Smith, Cory C. Cleveland, Norman W. Miller, Steven W. Running
Stoichiometric patterns in foliar nutrient resorption across multiple scales
*Nutrient resorption is a fundamental process through which plants withdraw nutrients from leaves before abscission. Nutrient resorption patterns have the potential to reflect gradients in plant nutrient limitation and to affect a suite of terrestrial ecosystem functions. *Here, we used a stoichiometric approach to assess patterns in foliar resorption at a variety of scales, specifically...
Authors
Sasha Reed, Alan R. Townsend, Eric A. Davidson, Cory C. Cleveland
Non-USGS Publications**
Sullivan, B.W., Alvarez-Clare, S., Castle, S.C., Porder, S., Reed, S.C., Schreeg, L., Townsend, A.R. and Cleveland, C.C., 2014. Assessing nutrient limitation in complex forested ecosystems: alternatives to large‐scale fertilization experiments. Ecology, 95(3), pp.668-681.
Cleveland, C.C., Houlton, B.Z., Smith, W.K., Marklein, A.R., Reed, S.C., Parton, W., Del Grosso, S.J. and Running, S.W., 2013. Patterns of new versus recycled primary production in the terrestrial biosphere. Proceedings of the National Academy of Sciences, 110(31), pp.12733-12737.
Reed, S.C., Cleveland, C.C. and Townsend, A.R., 2013. Relationships among phosphorus, molybdenum and free-living nitrogen fixation in tropical rain forests: results from observational and experimental analyses. Biogeochemistry, 114(1-3), pp.135-147.
Wickings, K., Grandy, A.S., Reed, S.C. and Cleveland, C.C., 2012. The origin of litter chemical complexity during decomposition. Ecology Letters, 15(10), pp.1180-1188.
Reed, S.C., 2008. Scaling from molecules to ecosystems: controls over free-living nitrogen fixation in terrestrial ecosystems. ProQuest.
Sattin, S.R., Cleveland, C.C., Hood, E., Reed, S.C., King, A.J., Schmidt, S.K., Robeson, M.S., Ascarrunz, N. and Nemergut, D.R., 2009. Functional shifts in unvegetated, perhumid, recently-deglaciated soils do not correlate with shifts in soil bacterial community composition. The Journal of Microbiology, 47(6), pp.673-681.
Costello, E.K., Halloy, S.R., Reed, S.C., Sowell, P. and Schmidt, S.K., 2009. Fumarole-supported islands of biodiversity within a hyperarid, high-elevation landscape on Socompa Volcano, Puna de Atacama, Andes. Applied and Environmental Microbiology, 75(3), pp.735-747.
Freeman, K.R., Pescador, M.Y., Reed, S.C., Costello, E.K., Robeson, M.S. and Schmidt, S.K., 2009. Soil CO2 flux and photoautotrophic community composition in high‐elevation,‘barren’soil. Environmental Microbiology, 11(3), pp.674-686.
Schmidt, S.K., Reed, S.C., Nemergut, D.R., Grandy, A.S., Cleveland, C.C., Weintraub, M.N., Hill, A.W., Costello, E.K., Meyer, A.F., Neff, J.C. and Martin, A.M., 2008. The earliest stages of ecosystem succession in high-elevation (5000 metres above sea level), recently deglaciated soils. Proceedings of the Royal Society of London B: Biological Sciences, 275(1653), pp.2793-2802.
Reed, S.C., Cleveland, C.C. and Townsend, A.R., 2008. Tree species control rates of free-living nitrogen fixation in a tropical rain forest. Ecology, 89(10), pp.2924-2934.
Reed, S.C., Cleveland, C.C. and Townsend, A.R., 2007. Controls over leaf litter and soil nitrogen fixation in two lowland tropical rain forests. Biotropica, 39(5), pp.585-592.
Schmidt, S.K., Costello, E.K., Nemergut, D.R., Cleveland, C.C., Reed, S.C., Weintraub, M.N., Meyer, A.F. and Martin, A.M., 2007. Biogeochemical consequences of rapid microbial turnover and seasonal succession in soil. Ecology, 88(6), pp.1379-1385.
Reed, S.C., Seastedt, T.R., Mann, C.M., Suding, K.N., Townsend, A.R. and Cherwin, K.L., 2007. Phosphorus fertilization stimulates nitrogen fixation and increases inorganic nitrogen concentrations in a restored prairie. Applied Soil Ecology, 36(2), pp.238-242.
Cleveland, C.C., Reed, S.C. and Townsend, A.R., 2006. Nutrient regulation of organic matter decomposition in a tropical rain forest. Ecology, 87(2), pp.492-503.
Bowker, M.A., Reed, S.C., Belnap, J. and Phillips, S.L., 2002. Temporal variation in community composition, pigmentation, and Fv/Fm of desert cyanobacterial soil crusts. Microbial Ecology, 43(1), pp.13-25.
Reed, S.C., Capitosti, G.J., Zhu, Z. and Modarelli, D.A., 2001. Photochemical generation and matrix-isolation detection of dimethylvinylidene. The Journal of Organic Chemistry, 66(1), pp.287-299.
Reed, S.C. and Modarelli, D.A., 1996. Conformational effects on the excited state 1, 2-hydrogen migration in alkyldiazomethanes. Tetrahedron Letters, 37(40), pp.7209-7212.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 18
Filter Total Items: 167
Effects of canopy tree species on belowground biogeochemistry in a lowland wet tropical forest
Tropical rain forests are known for their high biological diversity, but the effects of plant diversity on important ecosystem processes in this biome remain unclear. Interspecies differences in both the demand for nutrients and in foliar and litter nutrient concentrations could drive variations in both the pool sizes and fluxes of important belowground resources, yet our understanding...
Authors
Adrienne B. Keller, Sasha Reed, Alan R. Townsend, Cory C. Cleveland
Changes to dryland rainfall result in rapid moss mortality and altered soil fertility
Arid and semi-arid ecosystems cover ~40% of Earth’s terrestrial surface, but we know little about how climate change will affect these widespread landscapes. Like many drylands, the Colorado Plateau in southwestern United States is predicted to experience elevated temperatures and alterations to the timing and amount of annual precipitation. We used a factorial warming and supplemental...
Authors
Sasha Reed, Kirsten K. Coe, Jed P. Sparks, David C. Housman, Tamara J. Zelikova, Jayne Belnap
Tropical forest carbon balance in a warmer world: a critical review spanning microbial- to ecosystem-scale processes
Tropical forests play a major role in regulating global carbon (C) fluxes and stocks, and even small changes to C cycling in this productive biome could dramatically affect atmospheric carbon dioxide (CO2) concentrations. Temperature is expected to increase over all land surfaces in the future, yet we have a surprisingly poor understanding of how tropical forests will respond to this...
Authors
Tana E. Wood, Molly A. Cavaleri, Sasha Reed
Bioenergy potential of the United States constrained by satellite observations of existing productivity
United States (U.S.) energy policy includes an expectation that bioenergy will be a substantial future energy source. In particular, the Energy Independence and Security Act of 2007 (EISA) aims to increase annual U.S. biofuel (secondary bioenergy) production by more than 3-fold, from 40 to 136 billion liters ethanol, which implies an even larger increase in biomass demand (primary energy...
Authors
W.R. Smith, Cory C. Cleveland, Sasha Reed, Norman W. Miller, Steven W. Running
Bioenergy potential of the United States constrained by satellite observations of existing productivity
Background/Question/Methods Currently, the United States (U.S.) supplies roughly half the world’s biofuel (secondary bioenergy), with the Energy Independence and Security Act of 2007 (EISA) stipulating an additional three-fold increase in annual production by 2022. Implicit in such energy targets is an associated increase in annual biomass demand (primary bioenergy) from roughly 2.9 to 7...
Authors
Sasha Reed, William K. Smith, Cory C. Cleveland, Norman W. Miller, Steven W. Running
Stoichiometric patterns in foliar nutrient resorption across multiple scales
*Nutrient resorption is a fundamental process through which plants withdraw nutrients from leaves before abscission. Nutrient resorption patterns have the potential to reflect gradients in plant nutrient limitation and to affect a suite of terrestrial ecosystem functions. *Here, we used a stoichiometric approach to assess patterns in foliar resorption at a variety of scales, specifically...
Authors
Sasha Reed, Alan R. Townsend, Eric A. Davidson, Cory C. Cleveland
Non-USGS Publications**
Sullivan, B.W., Alvarez-Clare, S., Castle, S.C., Porder, S., Reed, S.C., Schreeg, L., Townsend, A.R. and Cleveland, C.C., 2014. Assessing nutrient limitation in complex forested ecosystems: alternatives to large‐scale fertilization experiments. Ecology, 95(3), pp.668-681.
Cleveland, C.C., Houlton, B.Z., Smith, W.K., Marklein, A.R., Reed, S.C., Parton, W., Del Grosso, S.J. and Running, S.W., 2013. Patterns of new versus recycled primary production in the terrestrial biosphere. Proceedings of the National Academy of Sciences, 110(31), pp.12733-12737.
Reed, S.C., Cleveland, C.C. and Townsend, A.R., 2013. Relationships among phosphorus, molybdenum and free-living nitrogen fixation in tropical rain forests: results from observational and experimental analyses. Biogeochemistry, 114(1-3), pp.135-147.
Wickings, K., Grandy, A.S., Reed, S.C. and Cleveland, C.C., 2012. The origin of litter chemical complexity during decomposition. Ecology Letters, 15(10), pp.1180-1188.
Reed, S.C., 2008. Scaling from molecules to ecosystems: controls over free-living nitrogen fixation in terrestrial ecosystems. ProQuest.
Sattin, S.R., Cleveland, C.C., Hood, E., Reed, S.C., King, A.J., Schmidt, S.K., Robeson, M.S., Ascarrunz, N. and Nemergut, D.R., 2009. Functional shifts in unvegetated, perhumid, recently-deglaciated soils do not correlate with shifts in soil bacterial community composition. The Journal of Microbiology, 47(6), pp.673-681.
Costello, E.K., Halloy, S.R., Reed, S.C., Sowell, P. and Schmidt, S.K., 2009. Fumarole-supported islands of biodiversity within a hyperarid, high-elevation landscape on Socompa Volcano, Puna de Atacama, Andes. Applied and Environmental Microbiology, 75(3), pp.735-747.
Freeman, K.R., Pescador, M.Y., Reed, S.C., Costello, E.K., Robeson, M.S. and Schmidt, S.K., 2009. Soil CO2 flux and photoautotrophic community composition in high‐elevation,‘barren’soil. Environmental Microbiology, 11(3), pp.674-686.
Schmidt, S.K., Reed, S.C., Nemergut, D.R., Grandy, A.S., Cleveland, C.C., Weintraub, M.N., Hill, A.W., Costello, E.K., Meyer, A.F., Neff, J.C. and Martin, A.M., 2008. The earliest stages of ecosystem succession in high-elevation (5000 metres above sea level), recently deglaciated soils. Proceedings of the Royal Society of London B: Biological Sciences, 275(1653), pp.2793-2802.
Reed, S.C., Cleveland, C.C. and Townsend, A.R., 2008. Tree species control rates of free-living nitrogen fixation in a tropical rain forest. Ecology, 89(10), pp.2924-2934.
Reed, S.C., Cleveland, C.C. and Townsend, A.R., 2007. Controls over leaf litter and soil nitrogen fixation in two lowland tropical rain forests. Biotropica, 39(5), pp.585-592.
Schmidt, S.K., Costello, E.K., Nemergut, D.R., Cleveland, C.C., Reed, S.C., Weintraub, M.N., Meyer, A.F. and Martin, A.M., 2007. Biogeochemical consequences of rapid microbial turnover and seasonal succession in soil. Ecology, 88(6), pp.1379-1385.
Reed, S.C., Seastedt, T.R., Mann, C.M., Suding, K.N., Townsend, A.R. and Cherwin, K.L., 2007. Phosphorus fertilization stimulates nitrogen fixation and increases inorganic nitrogen concentrations in a restored prairie. Applied Soil Ecology, 36(2), pp.238-242.
Cleveland, C.C., Reed, S.C. and Townsend, A.R., 2006. Nutrient regulation of organic matter decomposition in a tropical rain forest. Ecology, 87(2), pp.492-503.
Bowker, M.A., Reed, S.C., Belnap, J. and Phillips, S.L., 2002. Temporal variation in community composition, pigmentation, and Fv/Fm of desert cyanobacterial soil crusts. Microbial Ecology, 43(1), pp.13-25.
Reed, S.C., Capitosti, G.J., Zhu, Z. and Modarelli, D.A., 2001. Photochemical generation and matrix-isolation detection of dimethylvinylidene. The Journal of Organic Chemistry, 66(1), pp.287-299.
Reed, S.C. and Modarelli, D.A., 1996. Conformational effects on the excited state 1, 2-hydrogen migration in alkyldiazomethanes. Tetrahedron Letters, 37(40), pp.7209-7212.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.