Featured Publications & Products

• Butnor, John ; Johnsen, Kurt ; Anderson, Peter ; Hall, Kevin ; Halman, Joshua ; Hawley, Gary ; Maier, Christopher ; Schaberg, Paul G. 2019. Growth, Photosynthesis, and Cold Tolerance of Eucalyptus benthamii Planted in the Piedmont of North Carolina.
• Liu, Xiuwei; Dong, Xuejun; Xue, Qingwu; Leskovar, Daniel I.; Jifon, John; Butnor, John R.; Marek, Thomas. 2018. Ground penetrating radar (GPR) detects fine roots of agricultural crops in the field.
• Butnor, John R.; Verrico, Brittany M.; Vankus, Victor; Keller, Stephen R. 2018. Ethanol exposure can inhibit red spruce ( Picea rubens ) seed germination.
• Anderson, Peter H.; Johnsen, Kurt H.; Butnor, John R.; Gonzalez-Benecke, Carlos A.; Samuelson, Lisa J. 2018. Predicting longleaf pine coarse root decomposition in the southeastern US.

Patents

• Butnor, John; Maier, Christopher; Johnsen, Kurt. 2004. Automated Carbon Efflux System.

Publications

• Butnor, John; Verrico, Brittany; Johnsen, Kurt; Maier, Christopher; Vankus, Victor; Keller, Stephen. 2019. Phenotypic Variation in Climate-Associated Traits of Red Spruce (Picea rubens Sarg.) along Elevation Gradients in the Southern Appalachian Mountains.
• Hardiman, Brady; Gough, Christopher; Butnor, John; Bohrer, Gil; Detto, Matteo; Curtis, Peter. 2017. Coupling fine-scale root and canopy structure using ground-based remote sensing.
• Samuelson, Lisa J.; Stokes, Thomas A.; Butnor, John R.; Johnsen, Kurt H.; Gonzalez-Benecke, Carlos A.; Martin, Timothy A.; Cropper, Wendell P.; Anderson, Pete H.; Ramirez, Michael R.; Lewis, John C. 2017. Ecosystem carbon density and allocation across a chronosequence of longleaf pine forests.
• Schaberg, Paul G.; Murakami, Paula F.; Butnor, John R.; Hawley, Gary J. 2017. Experimental branch cooling increases foliar sugar and anthocyanin concentrations in sugar maple at the end of the growing season.
• Bain, John; Day, Frank; Butnor, John. 2017. Experimental evaluation of several key factors affecting root biomass estimation by 1500 MHz ground penetrating radar.
• Butnor, John R.; Samuelson, Lisa J.; Johnsen, Kurt H.; Anderson, Peter H.; Gonzalez Benecke, Carlos A.; Boot, Claudia M.; Cotrufo, M. Francesca; Heckman, Katherine A.; Jackson, Jason A.; Stokes, Thomas A.; Zarnoch, Stanley J. 2017. Vertical distribution and persistence of soil organic carbon in fire-adapted longleaf pine forests.
• Butnor, John R.; Johnsen, Kurt H.; Nelson, C. Dana. 2016. Changes in soil chemistry six months after prescribed fire in a longleaf pine plantation in Mississippi.
• Butnor, John R.; Samuelson, Lisa J.; Stokes, Thomas A.; Johnsen, Kurt H.; Anderson, Peter H.; Gonzalez-Benecke, Carlos A. 2016. Surface-based GPR underestimates below-stump root biomass.
• Maier, Christopher; Anderson, Peter; Butnor, John R.; Dougherty, Phillip M.; Johnsen, Kurt; Mcinnis, Daniel. 2016. Temporal and spatial patterns of soil CO2 efflux, soil carbon, and root biomass associated with bedding in young loblolly pine plantations.
• Gonzalez-Benecke, C.A.; Samuelson, L.J.; Martin, T.A.; Cropper Jr, W.P.; Johnsen, Kurt; Stokes, T.A.; Butnor, John; Anderson, P.H. 2015. Modeling the effects of forest management on in situ and ex situ longleaf pine forest carbon stocks.
• Samuelson, Lisa; Stokes, Tom; Butnor, John R.; Johnsen, Kurt H.; Gonzalez-Benecke, Carlos A.; Anderson, Pete; Jackson, Jason; Ferrari, Lorenzo; Martin, Tim A.; Cropper, Wendell P. 2014. Ecosystem carbon stocks in Pinus palustris forests.
• Butnor, John R.; Campbell, John L.; Shanley, James B.; Zarnoch, Stanley. 2014. Measuring soil frost depth in forest ecosystems with ground penetrating radar.
• Johnsen, Kurt H.; Keyser, Tara L.; Butnor, John R.; Gonzalez-Beenecke, Carlos A.; Kaczmarek, Donald J.; Maier, Chris A.; McCarthy, Heather R.; Sun, Ge. 2014. Productivity and carbon sequestration of forests in the southern United States.
• Berryman, Erin; Marshall, John D.; Rahn, Thom; Litvak, Marcie; Butnor, John. 2013. Decreased carbon limitation of litter respiration in a mortality-affected pinon-juniper woodland.
• Oishi, A. Christopher; Palmroth, Sari; Butnor, John; Johnsen, Kurt; Oren, Ram. 2013. Spatial and temporal variability of soil CO2 efflux in three proximate temperate forest ecosystems.
• Day, Frank; Schroeder, Rachel; Stover, Daniel; Brown, Alisha; Butnor, John; Dilustro, John; Hungate, Bruce; Dijkstra, Paul; Duval, Benjamin; Seiler, Troy; Drake, Bert; Hinkle, Ross. 2013. The effects of 11 yr of CO2 enrichment on roots in a Florida scrub-oak ecosystem.
• Runion, G. Brett; Butnor, John R.; Prior, S. A.; Mitchell, R. J.; Rogers, H. H. 2012. Effects of atmospheric CO2 enrichment on soil CO2 efflux in a young longleaf pine system.
• Butnor, John R.; Johnsen, Kurt H.; Nelson, C. Dana. 2012. Exploring genetic diversity, physiologic expression and carbon dynamics in longleaf pine: a new study installation at the Harrison Experimental Forest.
• Butnor, John R.; Johnsen, Kurt H.; Sanchez, Felipe G; Nelson, C. Dana. 2012. Impacts of pine species, stump removal, cultivation, and fertilization on soil properties half a century after planting.
• Butnor, John R. 2012. Proceedings of the 16th biennial southern silvicultural research conference.
• Butnor, John. 2011. Book Review of Soil carbon dynamics: an integrated methodology.
• Munoz Del Valle, Patricio R.; Huber, Dudley A.; Butnor, John R. 2011. Phenotypic analysis of first-year traits in a pseudo-backcross {(slash x loblolly) x slash} and the ope-pollinated families of the pure-species progenitors.
• Samuelson, Lisa J.; Eberhardt, Thomas L.; Butnor, John R.; Stokes, Tom A.; Johnsen, Kurt H. 2010. Maximum growth potential in loblolly pine: results from a 47-year-old spacing study in Hawaii.
• Doolittle, James. 2009. Soils, peatlands, and biomonitoring.
• Butnor, John; Johnsen, Kurt; Samuelson, Lisa; Pruyn, Michele. 2009. Current applications of GPR in forest research.
• Butnor, J.R.; Pruyn, M.L.; Shaw, D.C.; Harmon, M.E.; Mucciardi, A.N.; Ryan, M.G. 2009. Detecting defects in conifers with ground penetrating radar: applications and challenges.
• Johnsen, Kurt H.; Butnor, John R.; Kush, John S.; Schmidtling, Ronald C.; Nelson, C. Dana. 2009. Hurricane Katrina winds damaged longleaf pine less than loblolly pine.
• Busse, Matt D.; Sanchez, Felipe G.; Ratcliff, Alice W.; Butnor, John R.; Carter, Emily A.; Powers, Robert F. 2009. Soil carbon sequestration and changes in fungal and bacterial biomass following incorporation of forest residues.
• Samuelson, Lisa J.; Butnor, John; Maier, Chris; Stokes, Tom A.; Johnsen, Kurt; Kane, Michael. 2008. Growth and physiology of loblolly pine in response to long-term resource management: defining growth potential in the southern United States.
• Stover, Daniel B.; Day, Frank P.; Butnor, John R; Drake, Bert G. 2007. Effect of elevated CO2 on coarse-root biomass in Florida scrub detected by ground-penetrating radar.
• Johnsen, Kurt; Maier, Chris; Sanchez, Felipe; Anderson, Peter; Butnor, John; Waring, Richard; Linder, Sune. 2007. Physiological girdling of pine trees via phloem chilling: proof of concept.
• Palmroth, Sari; Oren, Ram; McCarthy, Heather R.; Johnsen, Kurt H.; Finzi, Adrien C.; Butnor, John R.; Ryan, Michael G.; Schlesinger, William H. 2006. Aboveground sink strength in forests controls the allocation of carbon below ground and its CO2 -induced enhancement.
• Butnor, John R.; Johnsen, Kurt H.; Wikstrom, Per; Lundmark, Tomas; Linder, Sune. 2006. Imaging tree roots with borehole radar.
• Butnor, John R.; Johnsen, Kurt H.; Sanchez, Felipe G. 2006. Whole-tree and forest floor removal from a loblolly pine plantation have no effect on forest floor CO2 efflux 10 years after harvest.
• Ma, Siyan; Chen, Jiquan; Butnor, John R.; North, Malcolm; Euskirchen, Eugénie S.; Oakley, Brian. 2005. Biophysical controls on soil respiration in the dominant patch types of an old-growth, mixed-conifer forest.
• Butnor, John; Roth, Brian; Johnsen, Kurt. 2005. Feasibility of using ground-penetrating radar to quantify root mass in Florida's intensively managed pine plantations.
• Butnor, John R.; Johnsen, Kurt H.; Maier, Chris A. 2005. Soil properties differently influence estimates of soil CO2 efflux from three chamber-based measurement systems.
• Butnor, John R.; Johnsen, Kurt H. 2004. Calibrating soil respiration measures with a dynamic flux apparatus using artificial soil media of varying porosity.
• Johnsen, Kurt; Teskey, Bob; Samuelson, Lisa; Butnor, John; Sampson, David; Sanchez, Felipe; Maier, Chris; McKeand, Steve. 2004. Carbon Sequestration in loblolly pine plantations: Methods, limitations, and research needs for estimating storage pools.
• Butnor, John R.; Johnsen, Kurt H.; Oren, Ram; Katul, Gabriel G. 2003. Reduction of forest floor respiration by fertilization on both carbon dioxide-enriched and reference 17-year-old loblolly pine stands.
• Butnor, John R.; Doolittle, J.A.; Johnsen, Kurt H.; Samuelson, L.; Stokes, T.; Kress, L. 2003. Utility of Ground-Penetrating Radar as a Root Biomass Survey Tool in Forest Systems.
• Maier, Chris A.; Johnsen, Kurt H.; Butnor, John; Kress, Lance W.; Anderson, Peter H. 2002. Branch growth and gas exchange in 13-year-old loblolly pine (Pinus taeda) trees in response to elevated carbon dioxide concentration and fertilization.
• Lai, Chun-Tai; Katul, Gabriel; Butnor, John; Ellsworth, David; Oren, Ram. 2002. Modelling night-time ecosystem respiration by a constrained source optimization method.
• Johnsen, Kurt H.; Wear, David N.; Oren, R.; Teskey, R.O.; Sanchez, Felipe; Will, Rodney E.; Butnor, John; Markewitz, D.; Richter, D.; Rials, T.; Allen, H.L.; Seiler, J.; Ellsworth, D.; Maier, Christopher; Katul, G.; Dougherty, P.M. 2001. Meeting global policy commitments carbon sequestration and southern pine forests.
• Johnsen, Kurt H.; Wear, Dave; Oren, R.; Teskey, R.O.; Sanchez, Felipe; Will, R.; Butnor, John; Markewitz, D.; Richter, D.; Rials, T.; Allen, H.L.; Seiler, J.; Ellsworth, D.; Maier, Christopher; Katul, G.; Dougherty, P.M. 2001. Meeting global policy commitments: carbon sequestration and southern pine forests.
• Butnor, John R.; Doolittle, J.A.; Kress, L.; Cohen, Susan; Johnsen, Kurt H. 2001. Use of ground-penetrating radar to study tree roots in the southeastern United States.
• Butnor, J.R.; Seiler, J.R.; Gray, J.A. 2000. Influence of Procerum Root Disease on the Water Relations of Eastern White Pine (Pinus strobus L.).

Research Highlights

Highlight	Title	Year
SRS-2014-145	Quantifying and Managing Carbon Sequestration in Longleaf Pine Ccosystems. Forests can offset greenhouse gas emissions by sequestering carbon dioxide in tree biomass, understory vegetation, forest floor litter, detritus ...	2014