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Wayne Polley
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H. Wayne Polley

Grassland Soil and Water Research Laboratory
808 East Blackland Rd.
Temple, TX 76502

Phone: (254) 770-6629



fax: (254) 770-6561


Baylor University, Bachelor of Science, Biology, 1979

University of Oklahoma, Master of Science, Botany, 1983

Colorado State University, Ph.D., Range Science, 1987


Research Interests


Grassland ecology - soil carbon, plant water relations, primary productivity, biodiversity, ecosystem C fluxes and ecosystem impacts of rising atmospheric (CO2) concentration and precipitation variability.



Current Research Projects


Lysimeter CO2 Gradient Experiment (Description)

Sustainability of ecosystem services in Southern Plains grasslands


Laboratory Personnel


Chris Kolodziejczyk


Katherine Jones




Recent Publications

Polley, H.W., C.A. Kolodziejczyk, K.A. Jones, J.D. Derner, D.J. Augustine, and D.R. Smith. 2022. UAV–enabled quantification of grazing-induced changes in uniformity of green cover on semiarid and mesic grasslands.  Rangeland Ecology and Management, 80(1): 68-77.

Menefee, D.S., H. Collins, D. Smith, R.L. Haney, P. Fay, and W. Polley. 2022. Cropping management in a livestock–pasture–crop integration modifies microbial communities, activity, and soil health score. Journal of Environmental Quality, 1–14.

Wang, S., M. Loreau, C. de Mazancourt, F. Isbell, C. Beierkuhnlein, J. Connolly, D. H. Deutschman, J. Dolezal, N. Eisenhauer, A. Hector, A. Jentsch, J. Kreyling, V. Lanta, J. Leps, H.W. Polley, P.B. Reich, J. van Ruijven, B. Schmid, D. Tilman, B. Wilsey, and D. Craven. 2021. Biotic homogenization destabilizes ecosystem functioning by decreasing spatial asynchrony. Ecology 102(6):e03332.

Fay, P.A., D. Hui, R.B. Jackson, H.P. Collins, L.G. Reichmann, M.J. Aspinwall, V.L. Jin, A.R> Khasanova, R.W. Heckman, and H.W. Polley. 2021. Multiple constraints cause positive and negative feedbacks limiting grassland soil CO2 efflux under CO2 enrichment.  Proceedings of the National Academy of Sciences of the United States of America 118(Issue 2).

Katerina Georgiou, K., R.B. Jackson, O. Vindušková, R.Z. Abramoff, A. Ahlstrom, W. Feng, J.W. Harden, H.W. Polley, W.J. Riley, M.S. Torn. Global capacity and controls of mineral-associated carbon in soils. Submitted: Proceedings National Academy of Sciences, January 8, 2021. Submitted: Nature Geosciences, February 23, 2021.

Wang, S., M.M. Loreau, C. de Mazancourt, F. Isbell, C. Beierkuhnlein, J. Connolly, D. Deutschman, J. Doležal, N. Eisenhauer, A. Hector, A. Jentsch, J. Kreyling, V. Lanta, J. Lepš, H. W. Polley, P. Reich, J. van Ruijven, B. Schmid, D. Tilman, B. Wilsey, D. Craven. Biotic homogenization destabilizes ecosystem functioning by decreasing spatial asynchrony.  Accepted:  Ecology, January 11, 2021.

Polley, H.W., H.P. Collins, and P.A. Fay. 2020.  Biomass production and temporal stability are similar in switchgrass monoculture and diverse grassland.  Biomass and Bioenergy 142, 105758.

Collins, H.P., Kimura, E., Polley, H.W., Fay, P.A., Fransen, S. 2020. Intercropping switchgrass with hybrid poplar increased carbon sequestration on a sand soil. Biomass and Bioenergy. 138, 05558.

Polley, H.W., C. Yang, B.J. Wilsey, and P.A. Fay. 2020. Temporal stability of grassland metacommunities is regulated more by community functional traits than species diversity. Ecosphere. 11(7):e03178.

Polley, H.W., C. Yang, B.J. Wilsey, and P.A. Fay. 2020. Spectrally derived values of community leaf dry matter content link shifts in grassland composition with change in biomass production. Remote Sensing in Ecology and Conservation.

Wilsey, B., X. Xu, H.W. Polley, K. Hofmockel, and S.J. Hall. 2020. Lower soil carbon stocks in exotic vs. native grasslands are driven by carbonate losses. Ecology 101(7):e03039.

Terrer, C., R.B. Jackson, I.C. Prentice, T.F. Keenan, C. Kaiser, S. Vicca, J B. Fisher, P B. Reich, B D. Stocker, B.A. Hungate, J. Peñuelas, I. McCallum, N.A. Soudzilovskaia, L.A. Cernusak, A.F. Talhelm, K. Van Sundert, S. Piao, P.C.D. Newton, M.J. Hovenden, D.M. Blumenthal, Y.Y. Liu, C. Müller, Winter, C.B. Field, W. Viechtbauer, C.J. Van Lissa, M.R. Hoosbeek, M. Watanabe, T. Koike, V. O. Leshyk, H W. Polley, and O. Franklin. 2019. Nitrogen and phosphorus constrain the CO2 fertilization of global plant biomass. Nature Climate Change 9: 684-689.

Polley, H.W., C. Yang, B.J. Wilsey, and P.A Fay, P.A. 2019. Spectral heterogeneity predicts local-scale gamma and beta diversity of mesic rasslands. Remote Sensing. 11(4):458.

Polley, H.W., Wilsey, B.J. 2018. Variability in community productivity-mediating effects of vegetation attributes. Functional Ecology. 32:1410-1419.

Fay, P.A., M. J. Aspinwall, H.P. Collins, A.E. Gibson, R.A. Gill, R.B. Jackson, V.L. Jin, A.R. Khasanova, L.G. Reichmann, and H.W. Polley. 2018. Flowering in grassland predicted by CO2 and resource effects on species aboveground biomass.  Global Change Biology 24: 1771-1781.

Johnson, D.M., J-C Domec, Z.C. Berry, A.M. Schwantes, K.A. McCulloh, D.R. Woodruff, H.W. Polley, R. Wortemann, J.J. Swenson, D.S. Mackay, N.G. McDowell, and R.B. Jackson. 2018. Co-occurring woody species have diverse hydraulic strategies and mortality rates during an extreme drought. Plant, Cell & Environment 41: 576-568.

Isbell, F.,  P.R. Adler, N. Eisenhauer, D. Fornara, K. Kimmel, C. Kremen, D.K. Letourneau, M. Liebman, H.W. Polley, S. Quijas, and M. Scherer-Lorenzen. 2017. Benefits of increasing plant diversity in sustainable agroecosystems. Journal of Ecology 105: 871-879.

Schwinning, S., H. Meckel, L.G. Reichmann, H.W. Polley, and P.A. Fay. 2017. Accelerated development in Johnsongrass seedlings (Sorghum halepense) suppresses the growth of native grasses through size-asymmetric competition.  PLoS ONE 12(5):e0176042. 

Xu, X, H.W. Polley, K. Hofmockel, and B.J. Wilsey. 2017. Species composition but not diversity explains recovery from the 2011 drought in Texas grasslands. Ecosphere 8(3):e01704. 10.1002/ecs2.1704

Polley, H.W., D.W. Bailey, R.S. Nowak, and M. Stafford-Smith. 2017. Ecological consequences of climate change on rangelands.  In: Rangeland Systems: Processes, Management and Challenges, ed. D.D. Briske. Springer Open, pgs. 229-260.

Reichmann, L.G., S. Schwinning, H.W. Polley, and P.A. Fay. 2016. Traits of an invasive grass conferring an early growth advantage over native grasses. Journal of Plant Ecology 9:672-681. DOI: 10.1093/jpe/rtw014.

Polley, H.W., H.P. Collins, L.G. Reichmann, and P.A. Fay. 2016. CO2 and soil water potential as regulators of the growth and N fraction derived from fixation of a legume in tallgrass prairie communities. Plant and Soil 409: 361-370.  DOI 10.1007/s11104-016-2971-5.

Polley, H.W., A.E. Gibson, P.A. Fay, and B.J. Wilsey. 2016. Biotic regulation of CO2 uptake-climate responses: links to vegetation properties.  Ecosystems 19(8): 1376-1385.   DOI  10.1007/s10021-016-0009-8.

Polley, H.W., D.A. Johnson, R.B. Jackson. 2016. Canopy foliation and area as predictors of mortality risk from episodic drought for individual tress of Ashe juniper.  Plant Ecology 217: 1105-1114.

Ziska, L.H., J.S. Pettis, J. Edwards, J.E. Hancock, M.B. Tomecek, A. Clark, J. S. Dukes, I. Loladze, H.W. Polley.  2016. Rising atmospheric CO2 is reducing the protein concentration of a floral pollen source essential for North American bees. Proceedings Royal Society B 283: 20160414.

Craven, D., F. Isbell, P. Manning, J. Connolly, H. Bruelheide, A. Ebeling, C. Roscher, J.van Ruijven, A. Weigelt, B. Wilsey, C. Beierkuhnlein, Luca, J.N. Griffin, Y. Hautier, A. Hector, A. Jentsch, J.Kreyling, V. Lanta, M. Loreau, S.T. Meyer, A.S. Mori, S. Naeem, C. Palmborg, H.W. Polley, P.B. Reich, B. Schmid, A. Siebenkäs, E. Seabloom, M.P. Thakur, D. Tilman, A. Vogel, N. Eisenhauer. 2016. Plant diversity effects on grassland productivity are robust to both nutrient enrichment and drought.  Philosophical Transactions Royal Society B 371: 20150277.

Xu, X., H.W. Polley, K. Hofmockel, P.P. Daneshgar, and B.J. Wilsey. 2015. Plant invasions differentially affected by diversity and dominant species in native- and exotic-dominated grasslands. Ecology and Evolution 5:5662-5670.


Fay, P.A., L.G. Reichmann, M.J. Aspinwall, A.R. Khasanova, and H.W. Polley. 2015. A CO2 concentration gradient facility for testing CO2 enrichment and soil effects on grassland ecosystem function. Journal of Visualized Experiments (105), e53151, doi:10.3791/53151.


Isbell F., D. Craven, J. Connolly, M. Loreau, B. Schmid, C. Beierkuhnlein,  T. Martijn Bezemer, C. Bonin, H. Bruelheide, E. de Luca, A. Ebeling, J.N. Griffin, Q. Guo, Y. Hautier, A. Hector, A. Jentsch, J. Kreyling, V. Lanta, P. Manning, S.T. Meyer, A.S. Mori, S. Naeem, P.A. Niklaus, H.W. Polley, P.B. Reich, C. Roscher, E.W. Seabloom, M.D. Smith, M.P. Thakur, D. Tilman, B.F. Tracy, W.H. van der Putten, J. van Ruijven, A. Weigelt, W.W. Weisser, B.Wilsey, and N. Eisenhauer.  2015.  Biodiversity increases the resistance of ecosystem productivity to climate extremes.  Nature 526: 574-577.


Fay, P.A., B.A. Newingham, H.W. Polley, J.A. Morgan, D.R. LeCain, R.S. Nowak, and S.D. Smith. 2015. Dominant plant taxa predict plant productivity responses to CO2 enrichment across precipitation and soil gradients. AoB PLANTS 7: plv027; doi: 10.1093/aobpla/plv027.


Briske, D.D., L.A. Joyce, H.W. Polley, J.R. Brown, K. Wolter, J.A. Morgan, B.A. McCarl, and D.W. Bailey. 2015.  Climate-change adaptation on rangelands: linking regional exposure with diverse adaptive capacity.  Frontiers in Ecology and the Environment 13:249-256, doi:10.1890/140266.


Polley, H.W., J.D. Derner, R.B. Jackson, R.A. Gill, A.C. Procter, and P.A. Fay. 2015. Plant community change mediates the response of foliar delta15N to CO2 enrichment in mesic grasslands. Oecologia 178:591-601.


Procter, A.C., R.A. Gill, P.A. Fay, H.W. Polley, and R.B. Jackson. 2015. Soil carbon responses to past and future CO2 in three Texas prairie soils. Soil Biology & Biochemistry 83:66-75.

Procter, A.C., J.C. Ellis, P.A. Fay, H.W. Polley, and R.B. Jackson. 2014. Fungal community responses to past and future atmospheric CO2 differ by soil type. Applied and Environmental Microbiology 80(23):7364-7377. Publication

Polley, H.W., J.D. Derner, R.B. Jackson, B.J. Wilsey, and P.A. Fay. 2014. Impacts of climate change drivers on C4 grassland productivity: Scaling driver effects through the plant community. Journal of Experimental Botany 65(13):3415-3424. Publication


Martin, L.M., H.W. Polley, P.P. Daneshgar, M.A. Harris, and B.J. Wilsey. 2014. Biodiversity, photosynthetic mode, and ecosystem services differ between native and novel ecosystems. Oecologia 175:687-697. Publication


Gross, K., B.J. Cardinale, J.W. Fox, A. Gonzalez, M. Loreau, H.W. Polley, P.B. Reich, and J. van Ruijven. 2014. Species richness and the temporal stability of biomass production: a new analysis of recent biodiversity experiments. American Naturalist 183:1-12.   Publication


Wilsey, B.J., P.P. Daneshgar, K. Hofmockel, and H.W. Polley. 2014. Invaded grassland communities have altered stability-maintenance mechanisms but equal stability compared to native communities. Ecology Letters 17:92-100.  Publication


Briske, D.D., B.T. Bestelmeyer, J.R. Brown, S.D. Fuhlendorf, and H.W. Polley. 2013. The savory method cannot green deserts or reverse climate change. Rangelands 35:72-74.  Publication


Polley, H.W., D.D. Briske, J.A. Morgan, K. Wolter, D.W. Bailey, and J.R. Brown. 2013. Climate change and North American rangelands: trends, projections, and implications. Rangeland Ecology & Management 66:493-511.  Publication


Joyce, L.A., D.D. Briske, J.R. Brown, H.W. Polley, B.A. McCarl, and D.W. Bailey. 2013. Climate change and North American rangelands: assessment, of mitigation and adaptation strategies.  Rangeland Ecology & Management 66:512-528.  Publication


Rico, C., J. Pittermann, H.W. Polley, M.J. Aspinwall, and P.A. Fay. 2013. The effect of subambient to elevated atmospheric CO2 concentration on vascular function in Helianthus annuus: implications for plant response to climate change. New Phytologist 199:956-965.  Publication


Polley, H.W., F.I. Isbell, and B.J. Wilsey. 2013. Plant functional traits improve diversity-based predictions of temporal stability of grassland productivity. Oikos 122:1275-1282.  


de Mazancourt, C., F. Isbell, A. Larocque, F. Berendse, E. De Luca, J.B. Grace, B. Haegeman, H.W. Polley C. Roscher, B. Schmid, D. Tilman, J. van Ruijven, A. Weigelt, B.J. Wilsey, and M. Loreau.  2013.  Predicting ecosystem stability from community composition and biodiversity. Ecology Letters 16:617-625.   Publication


Daneshgar, P.P., H.W. Polley, and B.J. Wilsey. 2013. Simple plant traits explain functional group diversity decline in novel grassland communities of Texas. Plant Ecology 214:231-241.   Publication


Jin, V.L., R.L. Haney, P.A. Fay, and H.W. Polley. 2013. Soil type and moisture regime control microbial C and N mineralization in grassland soils more than atmospheric CO2-induced changes in litter quality. Soil Biology & Biochemistry 58:172-180.  Publication


Derner, J.D., D.D. Briske, and H.W. Polley. 2012. Tiller organization within the tussock grass Schizachyrium scoparium: a field assessment of competition-cooperation tradeoffs. Botany 90:669-677.  Publication


Fay, P.A., V.L. Jin, D.A. Way, K.N. Potter, R.A. Gill, R.B. Jackson and H.W. Polley. 2012. Soil-mediated effects of subambient to increased carbon dioxide on grassland productivity. Nature Climate Change 2:742-746. Publication


Polley, H.W., V.L. Jin, and P.A. Fay. 2012. Feedback from plant species change amplifies CO2 enhancement of grassland productivity. Global Change Biology 18:2813-2823.  Publication


Torbert, H.A., H.W. Polley, and H.B. Johnson. 2012. Nitrogen and carbon cycling in a grassland community ecosystem as affected by elevated atmospheric CO2. International Journal of Agronomy 2012; doi:10.1155/2012/817343. Publication


Fay, P.A., H.W. Polley, V.L. Jin, and M.J. Aspinwall. 2012. Productivity of well-watered Panicum virgatum does not increase with CO2 enrichment. Journal of Plant Ecology 2012; doi: 10.1093/jpe/rts007. Publication


Polley, H.W., V.L. Jin, and P.A. Fay. 2012. CO2-caused change in plant species composition rivals the shift in vegetation between mid-grass and tallgrass prairies. Global Change Biology 18:700-710. Publication


Wilsey, B.J., P.P. Daneshgar, and H.W. Polley. 2011. Biodiversity, phenology and temporal niche differences between native- and novel exotic-dominated grasslands. Perspectives in Plant Ecology, Evolution and Systematics 13:265-276. Publication


Kelley, A.M., P.A. Fay, H.W. Polley, R.A. Gill, and R.B. Jackson. 2011. Atmospheric CO2 and soil extracellular enzyme activity: A meta-analysis and CO2 gradient experiment. Ecosphere 2(8):art96. Publication


Derner, J.D., K.R. Hickman, and H.W. Polley. 2011. Decreasing precipitation variability does not elicit major aboveground biomass or plant diversity responses in a mesic rangeland. Rangeland Ecology & Management 64:352-357. Publication


Polley, H.W., P.A. Fay, V.L. Jin, and G.F. Combs, Jr. 2011. CO2 enrichment increases element concentrations in grass mixtures by changing species abundances. Plant Ecology 212:945-957. Publication


Izaurralde, R.C., J.A. Morgan, A.M. Thompson, P.A. Fay, H.W. Polley, and J.L. Hatfield. 2011. Climate impacts on agriculture: Implications for forage and rangeland production. Agronomy Journal 103:371-381. Publication

Manzoni, S., G. Vico, G. Katul, P.A. Fay, H.W. Polley, S. Palmroth, and A. Porporato. 2011. Optimizing stomatal conductance for maximum carbon gain under water stress: A meta-analysis across plant functional types and climates. Functional Ecology doi:10.1111/j.1365-2435.2010.01822.x. Publication


Manzoni, S., G. Katul, P.A. Fay, H.W. Polley, and A. Porporato. 2011. Modeling the vegetation-atmosphere carbon dioxide and water vapor interactions along a controlled CO2 gradient. Ecological Modelling 222:653-665. Publication


Polley, H.W., R.L. Phillips, A.B. Frank, J.A. Bradford, P.L. Sims, J.A. Morgan, and J.R. Kiniry. 2011. Variability in light-use efficiency for gross primary productivity on Great Plains grasslands. Ecosystems 14:15-27. Publication


Polley, H.W., J.A. Morgan, and P.A. Fay. 2011. Application of a conceptual framework to interpret variability in rangeland responses to atmospheric CO2 enrichment. Journal of Agricultural Science 149:1-14. Publication


Johnson, M.-V.V., J.R. Kiniry, H. Sanchez, H.W. Polley, and P.A. Fay. 2010. Comparing biomass yields of low-input high-diversity communities with managed monocultures across the central United States. Bioenergy Research 3:353-361. Publication


Polley, H.W., W. Emmerich, J.A. Bradford, P.L. Sims, D.A. Johnson, N.Z. Saliendra, T. Svejcar, R. Angell, A.B. Frank, R.L. Phillips, K.A. Snyder, J.A. Morgan, J. Sanabria, P.C. Mielnick, and W.A. Dugas.  2010. Precipitation regulates the response of net ecosystem CO2 exchange to environmental variation on United States rangelands. Rangeland Ecology and Management 63(2):176-186. Publication

Polley, H.W., W. Emmerich, J.A. Bradford, P.L. Sims, D.A. Johnson, N.Z. Saliendra, T. Svejcar, R. Angell, A.B. Frank, R.L. Phillips, K.A. Snyder, and J.A. Morgan. 2010. Physiological and environmental regulation of interannual variability in CO2 exchange on rangelands in the western United States. Global Change Biology 16: 990-1002. Publication

Anderson, L.J., J.D. Derner, H.W. Polley, W.S. Gordon, D.M. Eissenstat, and R.B. Jackson. 2010. Root responses along a subambient to elevated CO2 gradient in a C3-C4 grassland. Global Change Biology 16: 454-468. Publication

Fay, P.A., A.M. Kelley, A.C. Procter, D. Hui, V.L. Jin, R.B. Jackson, H.B. Johnson, and H.W. Polley. 2009. Primary productivity and water balance of grassland vegetation on three soils in a continuous CO2 gradient: initial results from the Lysimeter CO2 Gradient Experiment. Ecosystems 12: 699-714. Publication

Isbell, F.I., H.W. Polley and B.J. Wilsey. 2009. Species interaction mechanisms maintain grassland plant species diversity. Ecology 90:1821-1830. Publication

Isbell, F.I., H.W. Polley and B.J. Wilsey. 2009. Biodiversity, productivity and the temporal stability of productivity: patterns and processes. Ecology Letters 12:443-451. Publication

Wilkinson, M.J., R.K. Monson, N. Trahan, S. Lee, E. Brown, R.B. Jackson, H.W. Polley, P.A. Fay and R. Fall. 2009. Leaf isoprene emission rate as a function of atmospheric CO 2concentration. Global Change Biology 15:1189-1200. Publication

Wilsey, B.J., T.B. Teaschner, P.P. Daneshgar, F.I. Isbell and H.W. Polley. 2009. Biodiversity maintenance mechanisms differ between native and novel exotic-dominated communities. Ecology Letters 12:432-442. Publication

Polley, H.W., A.B. Frank, J. Sanabria, and R.C. Phillips. 2008. Interannual variability in carbon dioxide fluxes and flux-climate relationships on grazed and ungrazed northern mixed-grass prairie. Global Change Biology 14: 1620-1632. Publication

Polley, H.W., H.B. Johnson, P.A. Fay, and J. Sanabria. 2008. Initial response of evapotranspiration from tallgrass prairie vegetation to CO2 at subambient to elevated concentrations. Functional Ecology 22: 163-171. Publication

Polley, H.W., B.J. Wilsey, and J.D. Derner. 2007. Dominant species constrain effects of species diversity on temporal variability in biomass production of tallgrass prairie. Oikos 116: 2044-2052. Publication

Polley, H.W., B. J. Wilsey, and C.R. Tischler. 2007. Species abundances influence the net biodiversity effect in mixtures of two plant species. Basic and Applied Ecology. 8: 209-218. Publication

Polley, H.W., W.A. Dugas, P.C. Mielnick, and H.B. Johnson. 2007. C3-C4 composition and prior carbon dioxide treatment regulate the response of grassland carbon and water fluxes to carbon dioxide. Functional Ecology 21: 11-18. pdf available on request.

Wilsey, B.J. and H.W. Polley. 2006. Aboveground productivity and root-shoot allocation differ between native and introduced grass species. Oecologia 150: 300-309. Publication

Polley, H.W., P.C. Mielnick, W.A. Dugas, H.B. Johnson, and J. Sanabria. 2006. Increasing CO2 from subambient to elevated concentrations increases grassland respiration per unit of net carbon fixation. Global Change Biology 12: 1390-1399. Publication

Polley, H.W., B.J. Wilsey, J.D. Derner, H.B. Johnson, and J. Sanabria. 2006. Early-successional plants regulate grassland productivity and species composition: a removal experiment. Oikos 113: 287-295. Publication

Polley, H.W., C.R. Tischler, and H.B. Johnson. 2006. Elevated atmospheric CO2 magnifies intra-specific variation in seedling growth of honey mesquite: An assessment of relative growth rates. Rangeland Ecology and Management 59: 128-134. Publication

Gill, R.A., L.J. Anderson, H.W. Polley, H.B. Johnson, and R.B. Jackson. 2006. Potential nitrogen constraints on soil carbon sequestration under low and elevated atmospheric CO2.  Ecology 87: 41-52. Publication

Wilsey, B.J., L.M. Martin, and H.W. Polley. 2005. Predicting plant extinction based on species-area curves in prairie fragments with high beta richness. Conservation Biology 19: 1835-1841. Publication

Derner, J.D., G.E. Schuman, M. Jawson, S.R. Shafer, J.A. Morgan, H.W. Polley, G.B. Runion, S.A. Prior, H.A. Torbert, H.H. Rogers, J. Bunce, L. Ziska, J.W. White, A.J. Franzluebbers, J.D. Reeder, R.T. Venterea, and L.A. Harper. 2005. USDA-ARS global change research on rangelands and pasturelands. Rangelands 27(5): 36-42. Publication

Polley, H.W., J.D. Derner, and B.J. Wilsey. 2005. Patterns of plant species diversity in remnant and restored tallgrass prairies. Restoration Ecology 13: 480-487. Publication

Derner, J.D., C.R. Tischler, H.W. Polley and H.B. Johnson. 2005. Seedling growth of two honey mesquite varieties under CO2 enrichment. Rangeland Ecology & Management 58: 292-298. Publication

Wilsey, B.J. and H.W. Polley. 2004. Realistically low species evenness does not alter grassland species-richness-productivity relationships. Ecology 85:2693-2700. Publication

Derner, J.D., H.W. Polley, H.B. Johnson, and C.R. Tischler. 2004. Structural attributes of Schizachyrium scoparium in restored Texas blackland prairies. Restoration Ecology 12:80-84. Publication

Derner, J.D., C.R. Tischler, H.W. Polley, and H.B. Johnson. 2004. Intergenerational above- and belowground responses of spring wheat (Triticum aestivum L.) to elevated CO2. Basic and Applied Ecology 5:145-152. Publication

Morgan, J.A., D.E. Pataki, C. K?rner, H. Clark, S.J. Del Grosso, J.M. Gr?nzweig, A.K. Knapp, A.R. Mosier, P.C.D. Newton, P.A. Niklaus, J.B. Nippert, R.S. Nowak, W.J. Parton, H.W. Polley, and M.R. Shaw. 2004. Water relations in grassland and desert ecosystems exposed to elevated atmospheric CO2. Oecologia 140:11-25. Publication

Derner, J.D., H.B. Johnson, B.A. Kimball, P.J. Pinter, Jr., H.W. Polley, C.R. Tischler, T.W. Boutton, R.L. LaMorte, G.W. Wall, N.R. Adam, S.W. Leavitt, M.J. Ottman, A.D. Matthias and T.J. Brooks. 2003. Above- and belowground responses of C3-C4 species mixtures to elevated CO2 and soil water availability. Global Change Biology 9:452-460. Publication

Polley, H.W., H.B. Johnson and J.D. Derner. 2003. Increasing CO2 from subambient to superambient concentrations alters species composition and increases above-ground biomass in a C3/C4 grassland. New Phytologist 160:319-327. Publication

Polley, H.W., B.J. Wilsey and J.D. Derner. 2003. Do species evenness and plant density influence the magnitude of selection and complementarity effects in annual plant species mixture? Ecology Letters 6:248-256. Publication

Wilsey, B.J. and H.W. Polley. 2003. Effects of seed additions and grazing history on species diversity and aboveground productivity of sub-humid grasslands. Ecology 84: 920-931. Publication

Gill, R.A., H.W. Polley, H.B. Johnson, L.J. Anderson, H. Maherali and R.B. Jackson. 2002. Nonlinear grassland responses to past and future atmospheric CO2. Nature 417:279-282. Publication

Maherali, H., C.D. Reid, H.W. Polley, H.B. Johnson and R.B. Jackson. 2002. Stomatal acclimation over a subambient to elevated CO2 gradient in a C3/C4 grassland. Plant, Cell and Environment 25:557-566. Publication

Polley, H.W. 2002. Implications of atmospheric and climatic change for crop yield and water use efficiency. Crop Science 42:131-140. Publication

Polley, H.W., H.B. Johnson and J.D. Derner. 2002. Soil- and plant-water dynamics in a C3/C4 grassland exposed to a subambient to superambient CO2 gradient. Global Change Biology 8:1118-1129. Publication

Polley, H.W., H.B. Johnson and C.R. Tischler. 2002. Woody invasion of grasslands: evidence that CO2 enrichment indirectly promotes establishment of Prosopisglandulosa. Plant Ecology 164:85-94. Publication

Polley, H.W., C.R. Tischler, H.B. Johnson and J.D. Derner. 2002. Growth rate and survivorship of drought: CO2 effects on the presumed tradeoff in seedlings of five woody legumes. Tree Physiology 22:383-391. Publication

Wilsey, B.J. and H.W. Polley. 2002. Reductions in grassland species evenness increase dicot seedling invasion and spittle bug infestation. Ecology Letters 5:676-684. Publication

Anderson, L.J., H. Maherali, H.B. Johnson, H.W. Polley and R.B. Jackson. 2001. Gas exchange and photosynthetic acclimation over subambient to elevated CO2 in a C3-C4 grassland. Global Change Biology 7:693-707.  Publication