Senior Scientist | Temperate Program Coordinator
Smithsonian Institution's Forest Global Earth Observatory
Smithsonian Environmental Research Center
P.O. Box 28, Edgewater, MD 21307-0028
Ph. (443) 482-2262 e-mail: email@example.com
|B. A.||Honors degree in Liberal Arts, University of Texas, Austin, Special honors awarded,||1992.|
|M. A.||Anglo-Irish Literature, University College Dublin||1993.|
|M. S.||Statistics, University of Tennessee, Knoxville, Department of Statistics||2006.|
|Ph. D.||Ecology and Evolutionary Biology, University of Tennessee, Knoxville, Department of Ecology and Evolutionary Biology||2007.|
January 2011 – present. Staff Ecologist, Temperate Forest Program Coordinator. Smithsonian Institution Global Earth Observatory, Smithsonian Environmental Research Center.
March 2009 – present. Smithsonian Tropical Research Institute, Center for Tropical Forest Science, and Smithsonian Environmental Research Center. Synthetic modeling of CTFS network census data, temperate and tropical forest sites. Post-doctoral fellow.
2006-2009. Duke University. Post-doctoral researcher with James S. Clark. Nicholas School of the Environment. Individual-based simulator of forest population dynamics.
Needham J, Merow C, Butt N, Malhi Y, Marthews TR, Morecroft M, McMahon SM. Forest community response to invasive pathogens: the case of ash dieback in a British woodland. Journal of Ecology. 2016;104(2):315--30. (Science Editor's Choice: http://science.sciencemag.org/content/352/6281/twil)
Král K, Shue J, Vr\vska T, Gonzalez-Akre EB, Parker GG, McShea WJ, McMahon SM. Fine-scale patch mosaic of developmental stages in Northeast American secondary temperate forests: the European perspective. European Journal of Forest Research. 2016;135(5):981--96.
Janík D, Král K, Adam D, Hort L, Samonil P, Unar P, Vrska T, McMahon SM. Tree spatial patterns of Fagus sylvatica expansion over 37years. Forest Ecology and Management. 2016;375:134--45.
Herrmann V, McMahon SM, Detto M, Lutz JA, Davies SJ, Chang-Yang C-H, Anderson-Teixeira KJ. Tree Circumference Dynamics in Four Forests Characterized Using Automated Dendrometer Bands. PloS one. 2016;11(12):e0169020.
Griffith AB, Salguero-Gómez R, Merow C, McMahon S. Demography beyond the population. Journal of Ecology. 2016;104(2):271--80.
Evans ME, Merow C, Record S, McMahon SM, Enquist BJ. Towards Process-based Range Modeling of Many Species. Trends in Ecology \& Evolution. 2016;31(11):860--71.
Visser MD, McMahon SM, Merow C, Dixon PM, Record S, Jongejans E. Speeding up ecological and evolutionary computations in R; essentials of high performance computing for biologists. PLoS Comput Biol. 2015;11(3):e1004140.
Sexton JO, Noojipady P, Anand A, Song X-P, McMahon S, Huang C, Feng M, Channan S, Townshend JR. A model for the propagation of uncertainty from continuous estimates of tree cover to categorical forest cover and change. Remote Sensing of Environment. 2015;156:418--25.
Metcalf CJE, Ellner SP, Childs DZ, Salguero-Gómez R, Merow C, McMahon SM, Jongejans E, Rees M. Statistical modelling of annual variation for inference on stochastic population dynamics using Integral Projection Models. Methods in Ecology and Evolution. 2015;6(9):1007--17.
McMahon SM, Parker GG. A general model of intra-annual tree growth using dendrometer bands. Ecology and evolution. 2015;5(2):243--54.
McMahon SM, Bebber DP, Butt N, Crockatt M, Kirby K, Parker GG, Riutta T, Slade EM. Ground based LiDAR demonstrates the legacy of management history to canopy structure and composition across a fragmented temperate woodland. Forest Ecology and Management. 2015;335:255--60.
Anderson-Teixeira KJ, McGarvey JC, Muller-Landau HC, Park JY, Gonzalez-Akre EB, Herrmann V, Bennett AC, So CV, Bourg NA, Thompson JR, others. Size-related scaling of tree form and function in a mixed-age forest. Functional Ecology. 2015;29(12):1587--602.
Anderson-Teixeira KJ, Davies SJ, Bennett AC, Gonzalez-Akre EB, Muller-Landau HC, Joseph Wright S, Abu Salim K, Almeyda Zambrano AM, Alonso A, Baltzer JL, others. CTFS-ForestGEO: a worldwide network monitoring forests in an era of global change. Global Change Biology. 2015;21(2):528--49.
Réjou-Méchain M, Muller-Landau HC, Detto M, Thomas SC, Le Toan T, Saatchi SS, Barreto-Silva JS, Bourg NA, Bunyavejchewin S, Butt N, Brockelman WY, Cao M, Cárdenas D, Chiang JM, Chuyong GB, Clay K, Condit R, Dattaraja HS, Davies SJ, Duque A, Esufali S, Ewango C, Fernando RHS, Fletcher CD, Gunatilleke IAUN, Hao Z, Harms KE, Hart TB, Hérault B, Howe RW, Hubbell SP, Johnson DJ, Kenfack D, Larson AJ, Lin L, Lin Y, Lutz JA, Makana JR, Malhi Y, Marthews TR, McEwan RW, McMahon SM, McShea WJ, Muscarella R, Nathalang A, Noor NSM, Nytch CJ, Oliveira AA, Phillips RP, Pongpattananurak N, Punchi-Manage R, Salim R, Schurman J, Sukumar R, Suresh HS, Suwanvecho U, Thomas DW, Thompson J, Uriarte M, Valencia R, Vicentini A, Wolf AT, Yap S, Yuan Z, Zartman CE, ZIMMERMAN JK, Chave J. Local spatial structure of forest biomass and its consequences for remote sensing of carbon stocks. Biogeosciences Discussions. 2014;11(4):5711--42.
Merow C, Smith MJ, Edwards TC, Guisan A, McMahon SM, Normand S, Thuiller W, Wüest RO, Zimmermann NE, Elith J. What do we gain from simplicity versus complexity in species distribution models? Ecography. 2014;37(12):1267--81.
Merow C, Latimer AM, Wilson AM, McMahon SM, Rebelo AG, Silander JA. On using integral projection models to generate demographically driven predictions of species' distributions: development and validation using sparse data. Ecography. 2014;37(12):1167--83.
Merow C, Dahlgren JP, Metcalf CJE, Childs DZ, Evans MEK, Jongejans E, Record S, Rees M, Salguero-Gómez R, McMahon SM. Advancing population ecology with integral projection models: a practical guide. Methods in Ecology and Evolution. 2014;5(2):99-110.
Král K, McMahon SM, Janík D, Adam D, Vrska Tv. Patch mosaic of developmental stages in central European natural forests along vegetation gradient. Forest Ecology and Management. 2014;330:17--28.
Metcalf CJE, McMahon SM, Salguero-Gómez R, Jongejans E. IPMpack: an R package for integral projection models. Methods in Ecology and Evolution. 2013;4(2):195--200.
Chisholm RA, Muller-Landau HC, Abdul Rahman K, Bebber DP, Bin Y, Bohlman SA, Bourg NA, Brinks J, Bunyavejchewin S, Butt N, others. Scale-dependent relationships between tree species richness and ecosystem function in forests. Journal of Ecology. 2013;101(5):1214--24.
Stark SC, Leitold V, Wu JL, Hunter MO, de Castilho CV, Costa FR, McMahon SM, Parker GG, Shimabukuro MT, Lefsky MA, others. Amazon forest carbon dynamics predicted by profiles of canopy leaf area and light environment. Ecology letters. 2012;15(12):1406--14.
Salk CF, McMahon SM. Ecological and environmental factors constrain sprouting ability in tropical trees. Oecologia. 2011;166(2):485--92.
McMahon SM, Metcalf CJ, Woodall CW. High-dimensional coexistence of temperate tree species: functional traits, demographic rates, life-history stages, and their physical context. Plos one. 2011;6(1):e16253.
McMahon SM, Harrison SP, Armbruster WS, Bartlein PJ, Beale CM, Edwards ME, Kattge J, Midgley G, Morin X, Prentice IC. Improving assessment and modelling of climate change impacts on global terrestrial biodiversity. Trends in Ecology \& Evolution. 2011;26(5):249--59.
Makana J-R, Ewango CN, McMahon SM, Thomas SC, Hart TB, Condit R. Demography and biomass change in monodominant and mixed old-growth forest of the Congo. Journal of Tropical Ecology. 2011;27(05):447--61.
McMahon SM, Parker GG, Miller DR. Evidence for a recent increase in forest growth. Proceedings of the National Academy of Sciences. 2010;107(8):3611--5.
McMahon SM, Parker GG, Miller DR. Reply to Foster et al.: Using a forest to measure trees: Determining which vital rates are responding to climate change. Proceedings of the National Academy of Sciences. 2010;107(21):E88--E9.
Clark JS, Bell D, Dietze M, Hersh M, Ibanez I, LaDeau S, McMahon S, Metcalf J, Moran E, Pangle L, others. Models for demography of plant populations. The Oxford handbook of applied Bayesian analysis Oxford University Press, New York, New York, USA. 2010:431--81.
Clark JS, Bell D, Chu C, Courbaud B, Dietze M, Hersh M, HilleRisLambers J, Ibá\vsez I, LaDeau S, McMahon S, others. High-dimensional coexistence based on individual variation: a synthesis of evidence. Ecological Monographs. 2010;80(4):569--608.
Canning-Clode J, Maloney KO, McMahon SM, Wahl M. Expanded view of the local--regional richness relationship by incorporating functional richness and time: a large-scale perspective. Global Ecology and Biogeography. 2010;19(6):875--85.
Metcalf CJE, McMahon SM, Clark JS. Overcoming data sparseness and parametric constraints in modeling of tree mortality: a new nonparametric Bayesian model. Canadian Journal of Forest Research. 2009;39(9):1677--87.
McMahon SM, Dietze MC, Hersh MH, Moran EV, Clark JS. A predictive framework to understand forest responses to global change. Annals of the New York Academy of Sciences. 2009;1162(1):221--36.
Thompson S, Katul G, McMahon SM. Role of biomass spread in vegetation pattern formation within arid ecosystems. Water resources research. 2008;44(10).
McMahon SM, Metcalf C. Transient sensitivities of non-indigenous shrub species indicate complicated invasion dynamics. Biological Invasions. 2008;10(6):833--46.
Loarie SR, Carter BE, Hayhoe K, McMahon S, Moe R, Knight CA, Ackerly DD. Climate change and the future of California's endemic flora. PloS one. 2008;3(6):e2502.
McMahon SM, Diez JM. Scales of association: hierarchical linear models and the measurement of ecological systems. Ecology Letters. 2007;10(6):437--52.
McMahon SM. Scale and Contingency in Plant Demography: Quantitative Approaches and Inference. 2007.
McMahon SM. Quantifying the community: Using Bayesian learning networks to find structure and conduct inference in invasions biology. Biological Invasions. 2005;7(5):833--44.
Starzomski B, Cardinale B, Dunne J, Hillery M, Holt C, Krawchuk M, Lage M, McMahon S, Melnychuk M. Contemporary visions of progress in ecology and thoughts for the future. Ecology and Society. 2004;9(1).
Vázquez DP, McMahon SM, Muth NZ, Collins MD. Review: The unified neutral theory of biodiversity and biogeography. Journal of Experimental Marine Biology and Ecology. 2002.
McMahon S, Cadotte M. Complexity and conservation: an ecological perspective. BioScience. 2002;52(6):460--1.
McMahon SM, Miller KH, Drake J. Networking tips for social scientists and ecologists. Science. 2001;293(5535):1604--5.
Johnson DJ, Needham J, Xu C, Massoud EC, Davies S, Anderson-Teixeira K, Bunyavejchewin S, Chang-Yang C-H, Chiang J-M, Chuyong G, Condit R, Cordell S, Fletcher C, Giardina C, Gunatilleke N, Gunatilleke S, Hsieh C-F, Hubbell S, Kassim AR, Katabuchi M, Kenfack D, Litton C, Lum S, Mohamad M, Musalmah N, Ong PS, Ostertag R, Sack L, Swenson N, Sun IF, Tan S, Thomas D, Thompson J, Umaña MN, Uriarte M, Valencia R, Yap S, Zimmerman J, McDowell N, McMahon SM. Tree survival in the tropics reveals limited demographic diversity. In Review.
Needham J, Meow C, Chang-Yang C-H, Caswell H, McMahon SM. A cross-scale demographic approach to forest dynamics. In Review.
Needham J, Chang-Yang C-H, Butt N, Malhi Y, Morecroft MD, McMahon SM. Estimating past impacts of seedling herbivory using current demography. In Review.
Chitra-Tarak R, Ruiz L, McMahon SM, Dattaraja HS, Kumar MSM, Riotte J, Suresh HS, Sukumar R. Trees with deep-water uptake more vulnerable to extreme drought in a seasonally dry tropical forest. In Review.
Taylor TC, McMahon SM, Smith MN, Violle C, van Haren J, Simova I, Jardine KJ, de Camargo PB, Ferreira LV, L. da Costa AC, Meir P, Boylea B, Enquist BJ, Saleska SR. Isoprene emission structures tropical tree biogeography and community assembly responses to climate. In Prep.
Smith MN, Stark SC, Woodcock T, Ferreira M, de Oliveira E, Alves LF, Figueira M, Restrepo-Coupe N, Aragao L, Camargo PB, de Oliveira RC, Falk DA, McMahon SM, Huxman T, Saleska SR. El Niño-associated changes in LiDAR-derived LAI and leaf area profiles in an eastern Amazonian forest. In Prep.
Smith MN, Stark SC, van Haren J, Leitold V, Woodcock T, Alves LF, Restrepo-Coupe N, Camargo PB, Oliveira d, C. R, McMahon SM, Falk DA, Huxman T, Saleska SR. Interannual changes in canopy structure with climate in an evergreen Amazonian forest. In Prep.
McMahon SM, Merow C, Needham J, Chang-Yang C-H, Jongejans E, Salguero-Gomez R, Metcalf CJE. Modeling tree growth for inference about forest dynamics. In Prep.
McMahon SM, Arellano G, J. DS. Detecting and understanding global consequences of small declines in tree survival. In Prep.
Albert LP, Restrepo-Coupe N, Smith M, Wu J, Chavanna-Bryant C, Taylor T, Prohaska N, Martins G, Huxman TE, McMahon SM, Saleska SR. Ecosystem implications of cryptic phenology: hidden seasonality in Amazon forests and beyond. In Prep.
Cadotte, M. W., McMahon, S. M., and Fukami, T. 2006. Conceptual Ecology and Invasions Biology: reciprocal approaches to nature. Springer-Verlag. Dordrecht, The Netherlands.
McMahon SM. 2017. Temperate forests: a tale of the Anthropocene. In
Clark, J. S. and D. Bell, M. Dietze, M. Hersh, I. Ibanez, S. LaDeau, S. M. McMahon, J. Metcalf, E. Moran, L. Pangle, and M. Wolosin. Models for demography of plant populations. Handbook of Bayesian Analysis, edited by Tony OHagan and Mike West.
McMahon, S. M., M. W. Cadotte, and T. Fukami, 2006. Tracking the tractable: using invasions to guide the exploration of conceptual ecology In: M.W. Cadotte, S. M. McMahon and T Fukami (eds.). Conceptual Ecology and Invasions Biology: reciprocal approaches to nature. Springer-Verlag Academic Academic Press. Dordrecht, The Netherlands.-
Cadotte, M. W., S. M., McMahon, and T. Fukami 2006. Linking spatially dependent processes in invasions. In: In: M.W. Cadotte, S. M. McMahon and T Fukami (eds.). Conceptual Ecology and Invasions Biology: reciprocal approaches to nature. Springer-Verlag. Dordrecht, The Netherlands.
McMahon, S. M. March 2014. Tree time: How temporal scale frames forest response to climate change, Department of Earth and Planetary Science, Johns Hopkins University, Maryland.
McMahon, S. M. November 2013. Modeling tree growth for projections and physiological inference. Laboratory of Tree-Ring Research, University of Arizona, Tuscon.
McMahon, S. M. March 2013. Physiological phenology: what seasons mean to trees. Indiana University, Bloomington, IA.
McMahon, S. M. May 2012. Tyson Research Center. Life of Trees: an introduction to growth and survival in forests. Washington University, St. Louis, MI.
McMahon, S. M. April 2012. Now-casting forests in a changing world. University of Arizona. McMahon, S. M. February 2012. The physiology of phenology: what seasons mean to trees.
McMahon, S. M. February 2012. The physiology of phenology: what seasons mean to trees. University of Maryland-Baltimore County.
McMahon, S. M. June 2012. The physiology of phenology: interpreting seasons of forests. George Washington University.
McMahon, S. M. Climate change threats to forest biodiversity: from evidence to prediction. December, 2010. National Museum of Natural History.
McMahon, S. M. Transient dynamics of temperate forests: Scaling from trees to the forest and back. December, 2010. Harvard University.
McMahon, S. M. Changing forests in a changing world. June, 2010. Nicolet National Forest Breeding Bird Survey.
McMahon, S. M. Scaling from trees to the forest and back: inferring changes in temperate forests. April, 2010. Department of Biology Ecolunch speaker at the University of Pennsylvania.
McMahon, S. M. Combining chronosequence and census data shows recent accelerated growth of temperate forest stands. February 2010. Smithsonian Tropical Research Institute. Panama City, Panama.
McMahon, S. M., J. S. Clark. Movement of forest species. September, 2009. Workshop on biodiversity and climate change. Kew Gardens, London, England.
McMahon, S. M. Structured variance and the coexistence of forest tree species. December, 2008. Invited lecture at the Ecole Normale Superieure, Paris, France.
McMahon, S. M. The future of forests: statistical and computational challenges of predicting large-scale biological systems. October, 2008. Math-Biology Series. Appalachian State University, Boone, NC.
McMahon, S. M., J. Metcalf, and J. Drake. December, 2006. The collision of systems: shifting the conceptual framework of invasion biology. Biology, Ecology and Management of World's Worst Plant Invasive Species. University of Delhi, India.
McMahon, S. M. June, 2004. Using machine learning to learn nature: Bayesian learning networks and inference in invasions biology. Conference on Computational and Mathematical Population Dynamics. Trento, Italy.
McMahon, S. M. 2003. Gaps, herbs, and insects: community structure in an old-growth southern Appalachian forest. Evolution and Behavior Seminars, Knoxville, TN.
I am an Associate Editor at Methods in Ecology and Evolution and have reviewed articles for Ecology, Ecology Letters, Trends in Ecology and Evolution, Journal of Ecology, Ecological Applications, Nature Climate Change, Nature Communications, Oikos, Ecological Applications, Ecological Modeling, Ecology and Evolution, Plant Ecology, Canadian Journal of Forest Research, New Phytologist, Journal of Applied Ecology, Diversity and Distributions, Limnology and Oceanography, and Biological Invasions. I have reviewed a number of proposals for NSF for the DEB cluster.
Programming languages: R, C++, SQL, Unix, MatLab, Python, SAS. Maintainer of the R package, IPMpack. # Code publication CJE Metcalf, SM McMahon, R Salguero-Gomez and E Jongejans (2012). IPMpack: Builds and analyses Integral Projection Models (IPMs). R package version 1.2. http://CRAN.R-projec- t.org/package=IPMpack.
Co-led a weeklong working group on Integral Projection Models with collaborators at the Max Planck Institute for Demographic Research, Rostock, Germany, June 2012.
Co-led a two-week workshop with Richard Condit on demographic modeling of forest data in Changbaishan, China. Led sections on multi-level modeling of demographic data and using Integral projection models to project forests into the future. July, 2011.
Published an R package, ‘IPMpack’ that builds, tests, and projects integral projection models (IPMs) for a range of data, including forest data.
Research Coordination Network (NSF funded) workshop on Ecological forecasting and data assimilation. NEON, Inc. Boulder, CO, July 2010.
The Tyson Research Center Forest Drought Laboratory: Establishing a Long-term Resource for Linking Climate Change, Extreme Droughts, and Ecosystem Dynamics, I-Cares, Washington University in St. Louis. Funded. $43K. 05/01/13-04/30/14.
Biotic carbon turnover: fungal influences on wood decay through space and time. George Washington University and the Smithsonian Institution. Co-PI. 50K. 03/01/13-02/28/14.
Linking Forest Community Dynamics to Ecosystem-Climate Interactions, Smithsonian Institution. Co-PI. 80K. March 1, 2013-February 28, 2015.
Dynamical modeling of species' responses to climate change – integrating plant distributions, demography, and traits in a Bayesian informatics framework. NSF Macrosystems. Co-PI. $660K. 01/01/13 - 12/31/16.
Measuring the Pulse of the Forest: Assessing Adaptation and Mitigation of Tribal Sustainable Forestry and Communities to Climate Change. USDA. Co-I. $200K. : 9/01/2012 - 8/31/2015.
REU Site: Global Change Ecology at the Smithsonian Environmental Research Center. NSF. Co-I. $101K. 04/01/2012 - 03/31/2017.
Co-PI on the grant ”Demography in a continuous world: new advances in integral projection models II” (€30K) from the Max Planck Society (2012).
NSF-CDI 0940671, Consultant. “Integrating algorithmic and stochastic modeling techniques for environmental prediction” (2009).
Science Alliance Award for Outstanding Scholarly Achievement by a Graduate Student. University of Tennessee, Knoxville. 2006.
Scholarly Activity and Research Incentive Funds (SARIF) (2005)
Summer Research Grant, Dept. of EEB, University of Tennessee (2001, 2002, 2003).
EEB Merit Award, Dept. of EEB, University of Tennessee (2002).
NSF Graduate Research Fellowship (Commended) (2002).
Integral Projection Models (co-coordinator). Max Planck Institute for Demographic Research. Rostock, Germany. June 2012.
SIGEO Symposium on Forest research. Beijing Botanical Gardens. Beijing, China. July, 2012.
Forest biodiversity working group. Part of the Research Coordination Network (NSF funded) grant on ecological forecasting and data assimilation.
Research Coordination Network (NSF funded) workshop on Ecological forecasting and data assimilation. NEON, Inc. Boulder, CO, July 2110.
CTFS database workshop. February, 2010. Bradley University. Peoria Illinois.
Workshop on Biodiversity and Climate Change. Royal Botanic Gardens, Kew, UK. September 2009. Organized by QUEST. September 2009.
Alpine summer school: Interaction and coevolution of climate and the biosphere. Valsavarenche, Italy. June, 2008.
Workshop on ‘Advanced prediction of biome boundary shifts in regional and global dynamic vegetation models.’ JAMSTEC Institute. Yokohama, Japan. March, 2008.
NSF workshop on Data-Model Assimilation. Norman, OK. October, 2007.
McMahon, S. M. and J. S. Clark. Modeling the trees for the forest: a computer simulation of a terrestrial ecosystem. A course for the Terrestrial Modeling component of the Statistical and Applied Mathematical Sciences Institute (SAMSI). Education and Outreach Program. Research Triangle, NC. March, 2007.
A brief introduction to Bayesian statistics (short course with computer lab). Max Plank Institute of Demographic Research. Rostock, Germany. October 2006.
Co-taught a workshop on Integral Projection Models and IPMpack, an R- package, at the ESA Annual Meeting, August 5, 2012, Portland, Oregon.
Courses: Aquatic Ecology (2000, 2003) and General Ecology (2002, 2003), General Biology (2005-2006).
Cory Merow is a current post-doc. I am on the dissertation committee of Amanda Whitehurst, University of Maryland, Department of Geography, and Tyeen Taylor, University of Arizona, Department of Ecology and Evolutionary Biology, Marielle Smith, University of Arizona.. Have mentored undergraduate thesis of Matthew Heard at the University of Tennessee. Have mentored two SERC interns.
Senior Scientist | Temperate Program Coordinator
Forest Global Earth Observatory
Smithsonian Environmental Research Center
647 Contees Wharf Road
Edgewater, MD 21037-0028
Ph. (443) 482-2262 | Fax: (443) 482-2380
If you use any photos from this site, please link to this web site and attribute the photo to Sean McMahon. Thanks