Research interests

I am an ecosystem ecologist who uses a variety of field and laboratory techniques to understand and predict how ecosystems are shaped by climatic change. Specifically, I work at the root-soil interface to investigate how atmospheric and climatic change alters belowground carbon and nutrient cycling.

Education

 Research and Professional Experience

Refereed publications

2017

Freschet GT, Valverde-Barrantes OJ, Tucker CM, Craine JM, McCormack ML, Violle C, Fort F, Blackwood CB, Urban-Mead KR, Iversen CM, Bonis A, Comas LH, Cornelissen JHC, Dong M, Guo D, Hobbie SE, Holdaway RJ, Kembel SW, Makita N, Onipchenko VG, Picon-Cochard C, Reich PB, de la Riva EG, Smith SW, Soudzilovskaia NA, Tjoelker MG, Wardle DA, Roumet C. 2017. Climate, soil and plant functional types as drivers of global fine-root trait variation. Journal of Ecology, DOI: 10.1111/1365-2745.12769.

Griffiths NA, Hanson PJ, Ricciuto DM, Iversen CM, Jensen AM, Malhotra A, McFarlane KJ, Norby RJ, Sargsyan K, Sebestyen SD, Shi X, Walker AP, Ward EJ, Warren JM, Weston DJ. 2017. Temporal and spatial variation in peatland carbon cycling and implications for interpreting responses of an ecosystem-scale warming experiment. Soil Science Society of America Journal, accepted.  

Hobbie EA, Chen J, Hanson PJ, Iversen CM, McFarlane KJ, Thorp NR, Hofmockel KS. 2017. Long-term carbon and nitrogen dynamics at SPRUCE revealed through stable isotopes in peat profiles. Biogeosciences 14: 2481.

Iversen CM, McCormack ML, Powell AS, Blackwood CB, Freschet GT, Kattge J, Roumet C, Stover DB, Soudzilovskaia NA, Valverde-Barrantes OJ, van Bodegom PM, Violle C. 2017. Viewpoints: A global Fine-Root Ecology Database to address belowground challenges in plant ecology. New Phytologist 215: 15-26.

Iversen CM, Childs J, Norby RJ, Ontl TA, Kolka RK, Brice DJ, McFarlane KJ, Hanson PJ. 2017. Fine-root growth in a forested bog is seasonally dynamic, but shallowly distributed in nutrient-poor peat. Plant and Soil, DOI: 10.1007/s11104-017-3231-z.

McCormack ML, Guo D, Iversen CM, Chen W, Eissenstat DM, Fernandez CW, Li L, Ma C, Ma Z, Poorter H, Reich PB, Zadworny M, Zanne A. 2017. Viewpoints: Building a better foundation: Improving root-trait measurements to understand and model plant and ecosystem processes. New Phytologist 215: 27-37.

Norby RJ, Iversen CM. 2017. Introduction to a Virtual Issue on root traits. New Phytologist 215: 5-8.

Song X, Hoffman FM, Iversen CM, Yin Y, Kumar J, Ma C, Xu X. 2017. Significant inconsistency of vegetation carbon density in CMIP5 Earth System Models against observational data. Journal of Geophysical Research - Biogeosciences, accepted.

Xu Y, Wang D, Iversen CM, Walker A, Warren J. 2017. Building a virtual ecosystem dynamic model for root research. Environmental Modelling & Software 89: 97-105.

Zhu Q, Iversen CM, Riley WJ, Slette IJ, Vander Stel HM. 2017. Root traits explain observed tundra vegetation nitrogen uptake patterns: Implications for trait-based land models. Journal of Geophysical Research: Biogeosciences 121: 3101-3112.

2016

Koven C, Kueppers L, Iversen CM, Reich P, Thornton PE. 2016. Expanding the use of plant trait observations and ecological theory in Earth system models: DOE Workshop Report. A summary report from the Terrestrial Ecosystem Science (TES) and Earth System Modeling (ESM) Workshop on Trait Methods for Representing Ecosystem Change; Rockville, MD, 18-19 November 2015. Report Date: May 31, 2016.

Kueppers LM, Iversen CM, Koven CD. 2016. Expanding the use of plant trait observations in Earth system models. Eos 97 (DOI:10.1029/2016EO049947).

Kumar J, Collier N, Bisht G, Mills RT, Thornton PE, Iversen CM, Romanovsky V. 2016. Modeling the spatio-temporal variability in subsurface thermal regimes across a low-relief polygonal tundra landscape. The Cryosphere 10: 2241-2274.

Langford Z, Kumar J, Hoffman FM, Norby RJ, Wullschleger SD, Sloan VL, Iversen CM. 2016. Mapping Arctic plant functional type distributions in the Barrow Environmental Observatory using WorldView-2 and LiDAR datasets. Remote Sensing 8: 733.

Mao J, Ricciuto DM, Thornton PE, Warren JM, King AW, Shi X, Iversen CM, Norby RJ. 2016. Evaluating the Community Land Model in a pine stand with 13CO₂ labeling and shading manipulations. Biogeosciences 13: 641-657.

McCormack ML, Iversen CM, Eissenstat DM. 2016. Moving forward with fine-root definitions and research. New Phytologist 212: 313.

Schädel C, Bader MKF, Schuur EAG,  Bracho R, Capek P, De-Baets S, Diakova K, Ernakovich J, Estop-Aragones C, Graham DE, Hartley IP, Iversen CM, Kane E, Knoblauch C, Lupascu M, Natali S, Norby RJ, O’Donnell JA, Roy Chowdhury T, Šantrůčková H, Shaver G, Sloan VL, Treat CC, Turetsky MR, Waldrop M, Wickland KP. 2016. Potential carbon emissions dominated by carbon dioxide from thawed permafrost soils. Nature Climate Change 6: 950-953.

Walker DA, Breen AL, Druckenmiller LA, Wirth LW, Fisher W, Raynolds MK, Šibík J, Walker MD, Hennekens S, Boggs K, Boucher T, Buchhorn M, Bültmann H, Cooper DJ, Daniëls FJA, Davidson SJ, Ebersole JJ, Elmendorf SC, Epstein HE, Gould WA, Hollister RD, Iversen CM, Jorgenson MT, Kade A, Lee MT, MacKenzie WH, Peet RK, Peirce JL, Schickhoff U, Sloan VL, Talbot SS, Tweedie CE, Villarreal S, Webber PJ, Zona D. 2016. The Alaska Arctic Vegetation Archive (AVA-AK). Phytocoenologia 46: 221-229.

2015

Heikoop JM, Throckmorton HM, Newman BD, Perkins GB, Iversen CM, Roy Chowdhury T, Romanovsky V,  Graham DE, Norby RJ, Wilson CJ, and Wullschleger SD. 2015. Isotopic identification of soil and permafrost nitrate sources in an Arctic tundra ecosystem. Journal of Geophysical Research: Biogeosciences 120: 1000-1017.

Hockaday WC, Gallagher ME, Masiello CA, Baldock JA, Iversen CM, Norby RJ. 2015. Forest soil carbon oxidation state and oxidative ratio responses to elevated CO₂. Journal of Geophysical Research: Biogeosciences 120: 1797-1811.

Iversen CM, Sloan VL, Sullivan PF, Euskirchen ES, McGuire AD, Norby RJ, Walker AP, Warren JM, Wullschleger SD. 2015. The unseen iceberg: Plant roots in arctic tundra (Tansley Review). New Phytologist 205: 34-58.

McCormack ML, Dickie IA, Eissenstat DM, Fahey TJ, Fernandez CW, Guo D, Helmisaari H-S, Hobbie EA, Iversen CM, Jackson RB, Leppälammi-Kujansuu J, Norby RJ, Phillips RP, Pregitzer KS, Pritchard SG, Rewald B, Zadworny M. 2015. Redefining fine roots improves understanding of below-ground contributions to terrestrial biosphere processes (Tansley Review). New Phytologist 207: 505-518.

Medlyn BE, Zaehle S, De Kauwe MG, Walker AP, Dietze MC, Hanson P, Hickler T, Jain A, Luo Y, Parton W, Prentice IC, Thornton PE, Wang S, Wang Y-P, Weng E, Iversen CM, McCarthy H, Warren JM, Oren R, Norby RJ. 2015. Using ecosystem experiments to improve vegetation models. Nature Climate Change 5: 528-534.

Treat C, Natali S, Ernakovich J, Iversen CM, Lupascu M, McGuire AD, Norby RJ, Roy Chowdhury T, Richter A, Šantrůčková H, Schädel C, Schuur EAG, Sloan VL, Turetsky M, Waldrop M. 2015. A pan-Arctic synthesis of CH₄ and CO₂ production from anoxic soil incubations. Global Change Biology 21: 2787-2803.

Wang D, Janjusic T, Iversen CM, Thornton PE, Krassovski M, Wu W, Xu Y. 2015. A scientific function test framework for modular environmental model development: Application to the Community Land Model. 1st IEEE/ACM International Workshop on Software Engineering for High Performance Computing in Science, Florence, Italy, May 2015, pp. 16-23.

Warren, JM, Hanson PJ, Iversen CM, Kumar J, Walker AP, Wullschleger SD. 2015. Root structural and functional dynamics in terrestrial biosphere models – Evaluation and recommendations (Tansley Review). New Phytologist 205: 59-78.

Wullschleger SD, Breen A, Iversen CM, Olson M, Nasholm T, Ganeteg U, Wallenstein M, Weston D. 2015. Genomics in a changing Arctic: Critical questions await the molecular ecologist. Molecular Ecology 24: 2301–2309.

2014

De Kauwe MG, Medlyn BE, Zaehle S, Walker AP, Dietze MC, Wang Y-P, Luo Y, Jain AK, El-Masri B, Hickler T, Wårlind D, Weng E, Parton WJ, Thornton PE, Wang S, Prentice IC, Asao S, Smith B, McCarthy HR, Iversen CM, Hanson PJ, Warren JM, Oren R, Norby RJ. 2014. Where does the carbon go? A model-data intercomparison of vegetation carbon allocation and turnover processes at two temperate forest free-air CO₂ enrichment sites. New Phytologist 203: 883-899.

Iversen CM. 2014. Using root form to improve our understanding of root function. New Phytologist 203: 707-709.

Iversen CM, Norby RJ. 2014. Terrestrial plant productivity and carbon allocation in a changing climate. In Freedman B, ed. Handbook of Global Environmental Pollution: Global Environmental Change, New York, NY: Springer, pp. 297-316.

Tfaily MM, Cooper WT, Kostka J, Chanton PR, Schadt CW, Hanson PJ, Iversen CM, Chanton JP. 2014. Organic matter transformation in the peat column at Marcell Experimental Forest: Humification and vertical stratification. Journal of Geophysical Research: Biogeosciences 119: 661-675.

Walker AP, Hanson PJ, De Kauwe MG, Medlyn BE, Zaehle S, Asao S, Dietze M, Hickler T, Huntingford C, Iversen CM, Jain A, Lomas M, Luo YQ, McCarthy H, Parton WJ, Prentice IC, Thornton PE, Wang SS, Wang YP, Warlind D, Weng ES, Warren, JM, Woodward FI, Oren R, Norby RJ. 2014.  Comprehensive ecosystem model-data synthesis using multiple data sets at two temperate forest free-air CO₂ enrichment experiments: Model performance at ambient CO₂ concentration. Journal of Geophysical Research: Biogeosciences 119: 937-964.

Wullschleger SD, Epstein HE, Box EO, Euskirchen ES, Goswami S, Iversen CM, Kattge J, Norby RJ, van Bodegom PM, Xu X. 2014. Plant functional types in Earth System Models: Past experiences and future directions for application of dynamic vegetation models in high-latitude ecosystems. Annals of Botany 114: 1-16.

Zaehle S, Medlyn BE, De Kauwe NG, Walker AP, Dietze MC, Hickler T, Luo Y, Wang Y-P, El-Masri B, Thornton P, Jain A, Wang S, Warlind D, Weng E, Parton W, Iversen CM, Gallet-Budynek A, McCarthy H, Finzi A, Hanson PJ, Prentice IC, Oren R, Norby RJ. 2014. Evaluation of 11 terrestrial carbon–nitrogen cycle models against observations from two temperate Free-Air CO₂ Enrichment studies. New Phytologist 202: 803–822.

2013

Lynch DJ, Matamala R, Iversen CM, Norby RJ, Gonzalez-Meler MA. 2013. Stored carbon partly fuels fine-root respiration but is not used for production of new fine roots. New Phytologist 199: 420-430.

2012

Iversen CM, Keller JK, Garten CT, Norby RJ. 2012. Soil carbon and nitrogen cycling and storage throughout the soil profile in a sweetgum plantation after 11 years of CO₂-enrichment. Global Change Biology 18: 1684-1697. (Faculty of 1000 article recommendation) .

Iversen CM, Murphy MT, Allen MF, Childs J, Eissenstat DM, Lilleskov EA, Sarjala TM, Sloan VL, Sullivan PF. 2012. Advancing the use of minirhizotrons in wetlands. Plant and Soil 352: 23–39.

Warren JM, Iversen CM, Garten CT, Norby RJ, Childs J, Brice DJ, Evans RM, Gu L, Thornton PE, Weston DJ. 2012. Timing and magnitude of carbon partitioning through a young loblolly pine (Pinus taeda L.) stand using ¹³C labeling and shade treatments. Tree Physiology 32: 799-813.

McMurtrie RE, Iversen CM, Dewar RC, Medlyn BE, Näsholm T, Pepper DA, Norby RJ. 2012. Plant root distributions and nitrogen uptake predicted by a hypothesis of optimal root foraging. Ecology and Evolution 2: 1235-1250.

2011

Garten CT, Iversen CM, Norby RJ. 2011. Litterfall ¹⁵N abundance indicates declining soil nitrogen availability in a free air CO₂-enrichment experiment. Ecology 92: 133-139.

Iversen CM, Hooker TD, Classen AT, Norby RJ. 2011. Net mineralization of N at deeper soil depths as a potential mechanism for sustained forest production under elevated [CO₂]. Global Change Biology 17: 1130-1139.

2010

Iversen CM. 2010. Digging deeper: Fine root responses to rising atmospheric CO₂ concentration in forested ecosystems. New Phytologist 186: 346-357.

Iversen CM, Bridgham SD, Kellogg LE. 2010. Scaling plant nitrogen-use and uptake efficiencies in response to nutrient addition in peatlands. Ecology 91: 693-707.

Iversen CM, O’Brien SL. 2010. Organized Oral Session 3. Missing links in the root–soil organic matter continuum. Bulletin of the Ecological Society of America 91: 54-64.

Norby RJ, Warren JM, Iversen CM, Medlyn BE, McMurtrie RE. 2010. CO2 enhancement of forest productivity constrained by limited nitrogen availability. Proceedings of the National Academy of Sciences, USA 107: 19368-19373.

2009

Franklin O, McMurtrie RE,  Iversen CM, Crous KY, Finzi A, Tissue DT, Ellsworth DS, Oren R, Norby RJ. 2009. Forest fine-root production and nitrogen use under elevated CO₂: contrasting responses in evergreen and deciduous trees explained by a common principle. Global Change Biology 15: 132-144.

O’Brien SL, Iversen CM. 2009. Missing links in the root-soil organic matter continuum. New Phytologist 184: 513-516.

2008

Iversen CM, Ledford J, Norby RJ. 2008. CO₂ enrichment increases carbon and nitrogen input from fine roots in a deciduous forest. New Phytologist: 179: 837-847.

Iversen CM, Norby RJ. 2008. Nitrogen limitation in a sweetgum plantation: Implications for carbon allocation and storage. Canadian Journal of Forest Research 38: 1021-1032.

2005 - 2007

Finzi AC, Norby RJ, Calfapietra C, Gallet-Budynek A, Gielen B, Holmes WE, Hoosbeek MR, Iversen CM, Jackson RB, Kubiske MB, Ledford J, Liberloo M, Oren R, Polle A, Pritchard S, Zak DR, Schlesinger WH, Ceulemans R. 2007. Increases in nitrogen uptake rather than nitrogen-use efficiency support higher rates of temperate forest productivity under elevated CO₂. Proceedings of the National Academy of Sciences, USA 104: 14014-14019.

Keller JK, Bauers AK, Bridgham SD, Kellogg LE, Iversen CM. 2006. Nutrient control of microbial carbon cycling along an ombrotrophic-minerotrophic peatland gradient. Journal of Geophysical Research 111: G03006.

Norby RJ, Iversen CM. 2006. Nitrogen uptake, distribution, turnover, and efficiency of use in a CO₂-enriched sweetgum forest. Ecology 87: 5-14.

Keller JK, Bridgham SD, Chapin CT, Iversen CM. 2005. Limited effects of six years of fertilization on carbon mineralization dynamics in a Minnesota fen. Soil Biology and Biochemistry 37: 1197-1204. 

Published Datasets

External funding

Current

Previous

Honors and awards

Service

Professional Activities

Alda-Kavli Leadership Program ‘Science Communication Workshop’, conducted by the Alan Alda Center for Communicating Science at Oak Ridge National Laboratory in November, 2016.

Organizing committee: 39th New Phytologist Symposium. ‘Trait covariation: Structural and functional relationships in plant ecology’, to be held in Exeter, UK in June, 2017.

Organizing committee: ‘DOE workshop on trait methods for representing ecosystem change’, held in Rockville, MD, USA in November, 2015, and funded by the Department of Energy, Office of Science.

Co-organizer: ‘A path forward for improved representation of fine roots in large-scale models: Linking models, data, and experiments’. Organized Oral Session at the annual Ecological Society of America meeting, August, 2014, in Sacramento, CA, USA

Organizer: ‘Roots in Models’ workshop held at Oak Ridge National Laboratory, TN, USA in June, 2014, and funded by the Department of Energy, Office of Science

Organizing committee: ‘Scaling Root Processes: Global Impacts’ workshop held in Washington, DC, USA, in March, 2012 and funded by the Department of Energy, Office of Science.

Organizer: ‘Advancing minirhizotron use to examine ephemeral root dynamics in peatland and high carbon ecosystems’. Small workshop hosted at Oak Ridge National Laboratory in October, 2010, and funded by the Department of Energy, Office of Science and New Phytologist Trust.

Co-organizer: ‘Missing links in the root-soil organic matter continuum’. Organized Oral Session at the annual Ecological Society of America meeting, August, 2009 in Albuquerque, NM, USA.

Society memberships: American Geophysical Union, Ecological Society of America, Soil Ecology Society.

Press and public outreach

'A seat at the table'
17 February 2017

‘ESA Early Career Fellow’
6 February 2017

‘Distilling your message’
6 November 2016
Oak Ridge National Laboratory
Alda-Kavali Leadership Program ‘Science Communication Workshop'

‘That's what is exciting about science’
2 May 2014
Oak Ridge National Laboratory

‘What problem are you working on?’
21 November 2013
Oak Ridge National Laboratory

‘Deep, dank and mysterious’
21 September 2013
New Scientist Magazine

‘CO₂ experiment over, but results still coming in’
14 March 2012
Knox News Sentinel

‘Study gets to the roots of enhanced CO₂ experiment’
7 March 2012
Nature News Blog

‘Final FACE harvest reveals increased soil carbon storage under elevated CO₂’
7 March 2012
The Oak Ridger

‘Subterranean Homesick Blues’
14 November 2011
Oak Ridge National Laboratory

‘Method of studying roots rarely used in wetlands improves ecosystem research’
19 October 2011
The Oak Ridger

‘Using tiny cameras to monitor wetlands’
13 October 2011
Knox News Sentinel

‘Method of studying roots, rarely used in wetlands, improves ecosystem research’
13 October 2011
ScienceDaily

‘ORNL interns taking advantage of chance of a lifetime’
26 July 2011
WBIR, Channel 10

‘What is a typical day for an ecosystem ecologist?’
15 September 2010
Oak Ridge National Laboratory

‘World-class science: Internships and research opportunities at ORNL’
15 September 2010
Oak Ridge National Laboratory 

‘ORNL Free-Air CO₂ Enrichment Experiment’
22 February 2008
WUOT (Local NPR station, Morning Edition)

Invited presentations

2016

Iversen CM et al. 2016. Linking Belowground Plant Traits With Ecosystem Processes:
A Multi-Biome perspective. Invited talk (by graduate students and post-docs in the Biogeoscience program), Boston University, Boston, MA, USA.

2015

Iversen CM, McCormack ML, Warren JM, Walker AP, Yang X, Wang D. 2015. A path forward to improve the representation of fine roots in terrestrial biosphere models. Invited talk. ‘Climate models revisited: the biogeochemical consequences of mycorrhizal dynamics’ meeting, KNAW, The Trippenhuis, Amsterdam.

Iversen CM, McCormack ML, Powell AS, Wang D, Xu Y. 2015. The need for a global root trait database. Invited lightning talk. DOE workshop on 'Trait methods for representing ecosystem change. Rockville, MD, USA.

2014

Iversen CM. 2014. Digging deeper: Improving our understanding of ecosystem responses to climate change through measurements and modeling of belowground processes. Keynote address. ‘Belowground processes and the RhizoNet integrated network of belowground measurements’ workshop at the Chinese Academy of Sciences Institute of Geographic Sciences and Natural Resources Research in Beijing, China.

2013

Iversen CM. 2013. Digging deeper: Improving our understanding of ecosystem responses to climate change through measurements and modeling of belowground processes. Invited talk. Virginia Tech, Blacksburg, VA, USA.

Iversen CM. 2013. Improving our understanding of ecosystem responses to climate change through measurements and modeling of belowground processes’. Invited talk. Belowground Carbon Cycling Processes at the Molecular Scale workshop, Environmental Molecular Sciences Laboratory at Pacific Northwest National Laboratory, Richland, WA, USA.

Iversen CM, Childs J, Norby RJ, Kolka, RK, Ontl TA.  2013. Advancing the use of minirhizotrons in wetlands. Invited talk. Environmental Sensing Technology workshop associated with the Center for Embedded Network Sensors at the University of California, Riverside, CA, USA.

2012

Iversen CM. 2012. Digging deeper: Improving our understanding of ecosystem responses to atmospheric and climatic change through measurements and modeling of belowground processes. Invited talk. Biogeochemistry and Environmental Science and Sustainability Fall 2012 Seminar Series, Cornell University, Ithaca, NY, USA.

Iversen CM, Norby RJ. 2012. Digging deeper: Rooting distributions in forested CO₂-enrichment experiments. Invited talk. Scaling Root Processes: Global Impacts workshop, Washington, D.C., USA.

2011

Iversen CM, Norby RJ. 2011. The interplay between soil N availability, C partitioning, and ecosystem C storage in a CO₂-enriched sweetgum plantation. Invited talk. The 27^th New Phytologist Symposium: Stoichiometric flexibility in terrestrial ecosystems under global change. Biosphere 2, Oracle, AZ, USA

Iversen CM. 2011. At the root of the response: Carbon and nitrogen cycling in a CO₂-enriched deciduous forest. Invited talk. Oak Ridge Institute for Continued Learning, Philosophical Society, Oak Ridge, TN, USA.

2010

Iversen CM. 2010. At the root of the response: Carbon and nitrogen cycling in a CO₂-enriched deciduous forest. Invited talk. Biology Department, Hope College, Holland, MI, USA.

2009

Iversen CM. 2009. The causes and consequences of increased fine-root production in a CO₂-enriched sweetgum plantation. Invited talk. Biosciences Division Seminar, Argonne National Laboratory, Argonne, IL, USA.

Iversen CM. 2009. The causes and consequences of increased fine-root production in a CO₂-enriched sweetgum plantation. Invited talk. Department of Biological Sciences Seminar, University of Illinois at Chicago, Chicago, IL, USA.

2008

Iversen CM. 2008. The causes and consequences of increased fine-root production in a CO₂-enriched sweetgum plantation. Keynote address. High CO₂Workshop, University of Western Sydney, New South Wales, Australia.

2006

Iversen CM. 2006. At the root of the response: Carbon and nitrogen cycling in a CO₂-enriched deciduous forest. Invited talk. Smithsonian Environmental Research Center, Edgewater, MD, USA.

Iversen CM. 2006. Plant nitrogen use from fens to forests: Consequences for carbon storage. Invited talk. Oak Ridge National Laboratory weekly “Fishheads” meeting, Oak Ridge, TN, USA.

Presentations at annual meetings

2015

Iversen CM, Childs J, Walker AP, Hanson PJ, Norby RJ, Powell AS, Warren JM, Wullschleger SD, McCormack ML, Sloan VL, Sullivan PD. 2015. Linking Belowground Plant Traits With Ecosystem Processes: A Multi-Biome perspective. Invited presentation in Organized Session: ‘Plant traits and biogeochemical cycles’. American Geophysical Union annual fall meeting, San Francisco, CA, USA.

Iversen CM et al. 2015. Finding a home for experimental data in terrestrial biosphere models: An empiricist’s perspective. Invited presentation in Organized Session: ‘Constraining Ecosystem Carbon Uptake and Long-Term Storage with Integrated Modeling, Experiment, and Observation’. American Geophysical Union annual fall meeting, San Francisco, CA, USA.

Iversen CM, McCormack ML, Warren JM, Walker AP, Yang X, Wang D. 2015. A path forward to improve the representation of root traits in terrestrial biosphere models. Invited presentation at annual DOE PI Meeting, Environmental System Science, Washington, DC, USA.

Iversen CM, Childs J, Norby RJ, Ontl TA, Kolka RK, Brice DJ, McFarlane K, Hanson PJ. 2015. Just beneath the surface: The distribution and dynamics of fine roots in a forested bog. DOE PI Meeting, Environmental System Science, Washington, DC, USA. Poster presentation.

Iversen CM, Hanson PJ, and the rest of the SPRUCE team. 2015. Warming an ombrotrophic bog from deep, ancient peat to the forest canopy. Invited presentation in Symposium: ‘Coastal and Inland: Carbon, Water and Energy Cycling in a Changing Environment’. Society of Wetland Scientists annual meeting, Providence, RI, USA.

Iversen CM, McCormack ML, Warren JM, Trumbo JL*, Powell AS*, Wullschleger SD. 2015. Fine roots in models: The answer to life, the universe, and everything. Invited presentation in Ignite Session: Ecology in Earth System Models: What’s Missing and Why Is It Important? Ecological Society of America annual meeting, Baltimore, MD, USA. *Student.

Trumbo JL*, Iversen CM, Powell AS*, McCormack ML, Warren JM. 2015. Engaging FRED (Fine-Root Ecology Database): Leveraging variation in root functional traits within and among plant functional types to better understand and model above- and belowground ecosystem processes. Ecological Society of America annual meeting, Baltimore, MD, USA. *Student. Poster Presentation.

Vander Stel HM*, Iversen CM, Norby RJ, Sloan VL, Childs C, Brice DJ, Jong A*, Keller JK, Ladd M*, Wullschleger SD. 2015. Carbon release from a warmer, wet, organic-rich active layer across a gradient of polygonal tundra in the Arctic may provide an important feedback to the atmosphere. Ecological Society of America annual meeting, Baltimore, MD, USA. *Student. Poster Presentation.

Xu Y*, Wang D, Yao C, Iversen CM. 2015. Building a community root module with built-in functions from the Community Land Model. Ecological Society of America annual meeting, Baltimore, MD, USA. *Student. Poster Presentation.

2014

Iversen CM. 2014. A path forward to improve the representation of fine roots in terrestrial biosphere models. Invited presentation in Organized Oral Session: ‘A Path Forward for Improved Representation of Fine Roots in Large-scale Models: Linking Models, Data, and Experiments’. Ecological Society of America annual meeting, Sacramento, CA, USA.

Slette IJ, Iversen CM, Sloan VL, Childs J, Norby RJ, and *Wullschleger SD. 2014. Characterizing rooting depth distribution and nitrogen acquisition by dominant tundra plant species. Terrestrial Ecosystem Science (TES)-Subsurface Biogeochemical Research (SBR) Joint Investigators Meeting, Washington, DC, USA. Poster presentation. *Presenter.

Iversen CM, Childs J, Norby RJ, Kolka RK, McFarlane KJ, *Hanson PJ. 2014. Quantifying the distribution and dynamics of fine roots and fungal hyphae in a bog ecosystem using established and novel techniques. Terrestrial Ecosystem Science (TES)-Subsurface Biogeochemical Research (SBR) Joint Investigators Meeting, Washington, DC, USA. Poster presentation. *Presenter.

Iversen CM, Sloan VL, Sullivan PF, Euskirchen ES, McGuire AD, Norby RJ, Walker AP, Warren JM, *Wullschleger SD. 2014. The unseen iceberg: Plant roots in arctic tundra. US International Association of Landscape Ecology (US-IALE) meeting in Anchorage, Alaska, USA. Poster presentation. *Presenter.

2013

Iversen CM, Childs J, Norby RJ. 2013. ORNL FACE improved our understanding and modeling of root-soil interactions. Invited poster in Organized Session: ‘Ecosystem Responses to Increasing Atmospheric CO₂: Moving Forward from First Generation Free Air CO₂ Experiments’. American Geophysical Union annual fall meeting, San Francisco, CA, USA.

Iversen CM, Slette I, Sloan V, Liebig J, Childs J, Norby RJ, Wullschleger SD. 2013. Digging deeper: Nitrogen acquisition by dominant tundra plant species. Summary talk. Next-Generation Ecosystem Experiments – Arctic, annual all hands meeting, San Francisco, CA, USA.

Iversen CM. 2013. Quantifying and categorizing the unseen: The representation of root traits in PFTs. Invited presentation in Organized Oral Session: ‘Plant Functional Types in DVM for Arctic Ecosystems: Past Experiences, Future Directions’. Ecological Society of America annual meeting, Minneapolis, MN, USA.

Iversen CM, Walker AP, Childs J, Norby RJ. 2013. From near to far, from here to there, funny things are everywhere. Invited talk in Ignite Session: ‘Scaling in Global Change Studies: Representation in Multiple Dimensions’. Ecological Society of America annual meeting, Minneapolis, MN, USA.

Iversen CM, Warren JM, Norby RJ, Mao J, Ricciuto DM, Walker AP, Thornton PE. 2013. Partitioning in Trees and Soils (PiTS): A field research facility for testing dynamic carbon partitioning representations within global models. Summary talk. Terrestrial Ecosystem Science (TES)-Subsurface Biogeochemical Research (SBR) Joint Investigators Meeting, Washington, DC, USA.

2012

Iversen CM, Hanson PJ, Childs J, Norby RJ, Kolka RK, Barbier C, Bisht G, Griffiths NA, Hook LA, Palik B, Schadt CW, Sebestyen SD, Steinweg JM, Thomas WK, Thornton PE, Warren JM, Weston DJ, Wullschleger SD. 2012. Spruce - Peatland Responses Under Climatic and Environmental change (SPRUCE): An in situ warming by CO₂ manipulation of a peatland ecosystem. International Association for Ecology (INTECOL)-Wetlands annual meeting, Orlando, FL, USA. Poster presentation.

2011

Iversen CM, Keller JK, Garten GT, Norby RJ. 2011. The consequences of deeper rooting distributions under elevated [CO₂]. Invited talk in Organized Oral Session: ‘Measuring and Modeling Roots, the Rhizosphere, and Microbial Processes Belowground’. Ecological Society of America annual meeting, Austin, TX, USA.

2010

Iversen CM. 2010. Digging deeper: fine-root responses to rising atmospheric CO₂ concentration in forested ecosystems. Climate Change Science Institute, First Annual Science Advisory Board Meeting, Oak Ridge National Laboratory, Oak Ridge, TN, USA. Poster presentation.

Iversen CM. 2010. Digging deeper: Rooting distributions in CO₂-enriched forests. Fifth International Symposium on Physiological Processes in Roots of Woody Plants, University of Victoria, Victoria, BC, Canada. Oral presentation.

2009

Iversen CM, Bridgham SD, Kellogg LE. 2009. Scaling plant nitrogen-use and uptake efficiencies in response to nutrient addition in peatlands. Second International PeatNet Symposium: Peatlands in the global carbon cycle, Prague, Czech Republic. Poster presentation.

Iversen CM, Jastrow JD, and Norby RJ. 2009. Carbon and nitrogen inputs from decomposing roots into different soil organic matter fractions. Invited talk in Organized Oral Session: ‘Missing links in the root-soil organic matter continuum’. Ecological Society of America annual meeting, Albuquerque, NM, USA.

2008

Iversen CM, Childs J, Norby RJ. 2008. CO₂ enrichment increases carbon and nitrogen input from fine roots in a deciduous forest. Ecological Society of America annual meeting, Milwaukee, WI, USA. Oral presentation.

2005 – 2007

Iversen CM. 2007. At the root of the response in a CO₂-enriched deciduous forest. M.L. Wesely Graduate Research Environmental Fellow, Global Climate Education Program, annual end-of-year meeting, Washington, D.C., USA. Oral presentation.

Iversen CM, Norby RJ and Classen AT. 2006. Changes in fine-root quantity and quality with elevated CO₂: Implications for decomposition and nitrogen cycling. Ecological Society of America annual meeting, Memphis, TN, USA. Winner of best student poster award, Soil Ecology Section.

Iversen CM, Norby RJ and Classen AT. 2006. Nitrogen cycling in a CO₂-enriched deciduous forest: Implications for carbon storage. Global Change Education Program, Graduate Research Environmental Fellowship annual orientation, Portland, OR, USA. Oral presentation.

Iversen CM, and Norby RJ, and Gunderson CA. 2005. Nitrogen limitation and the potential for long-term effects on production and carbon storage in a CO₂-enriched forest. Ecological Society of America annual meeting, Montreal, Canada. Poster presentation.

Iversen CM, and Norby RJ. 2005. Nitrogen limitation and the potential for long-term effects on production and carbon storage in a CO2-enriched forest. Soil Ecology Society bi-annual meeting, Argonne National Laboratory, Argonne, IL, USA. Winner of second best student poster award.

Iversen CM, and Norby RJ. 2005. Nitrogen distribution and dynamics in a CO₂-enriched deciduous forest: Will nitrogen limitation preclude a sustained productivity response? TERACC Workshop, Modeling Ecosystem Responses to Global Change: Techniques and Recent Advances, Fort Myers, FL, USA. Poster presentation.

Updated on 19 June 2017.