Published Papers
Zhao Wang, Joseph D. White, William C Hockaday, The molecular composition of leaf lipids changes with seasonal gradients in temperature and light among deciduous and evergreen trees in a sub-humid ecosystem. Organic Geochemistry, 187, 104709, 2024. DOI: 1016/j.orggeochem.2023.104709
William C. Hockaday, Markus Kleber, Peter S. Nico, Characteristics of Biochar: Macromolecular Properties, IN Biochar for Environmental Management, J. Lehmann and S. Joseph (Eds), Taylor & Francis, 2024 (in press).
David W. Yeates, William C. Hockaday, Stacy C. Atchley, Elizabeth G. Rau, Anna M. Thorson, Duvernay maturity trends and identification of the Willesden-Green Maturity High, Marine and Petroleum Geology, September 6, 2022, 1205894. DOI: 1016/j.marpetgeo.2022.105894
Zhao Wang, Joseph D. White, Jonathan Thomas, William C. Hockaday, A streamlined method for pressurized extraction and fractionation of leaf lipids, Organic Geochemistry, July 19, 2022. DOI: 1016/j.orggeochem.2022.104470
Burke C. Leonce, William C. Hockaday, Manyiel M. Mel, Aurore Niyitanga Manzi, and Omar R. Harvey*, Sorption Dynamics and Energetics of Cinnamic Acid and its Derivatives at the Ferrihydrite-Water Interface determined by Flow-Adsorption Microcalorimetry, ACS Earth & Space Chemistry, March 30, 2022 https://pubs.acs.org/doi/abs/10.1021/acsearthspacechem.1c00411
Wenjuan Huang, Kefeng Huang, Chenglong Ye, William C. Hockaday, Gangsheng Wang, Steven J. Hall, High carbon losses from oxygen-limited soils challenge biogeochemical theory and model assumptions, Global Change Biology, 27, 23, 3166-3180, 2021. DOI: 10.1111/gcb.15867
Tai McClellan Maaz, William C. Hockaday, Jonathan L. Deenik, Biochar volatile matter and feedstock effects on soil nitrogen mineralization and soil fungal colonization, Sustainability, 13, 2021 DOI: 10.3390/su13042018
Christopher I. Roos, Thomas W. Swetnam, T. J. Ferguson, Matthew J. Liebmann, Rachel A. Loehman, John R. Welch, Ellis Q. Margolis, Christopher H. Guiterman, William C. Hockaday, Michael Aiuvalasit, Jenna Battillo, Josh Farella, Christopher A. Kiahtipes, Chris Toya, Paul Tosa, Native American Fire Management at an Ancient Wildland-Urban Interface in the Southwest US, Proceedings of the National Academy of Sciences, Jan 18, 2021. DOI: 10.1073/pnas.2018733118 ***Cozarrelli Prize finalist citation***
Steven L. Forman, William C. Hockaday, Peng Liang, Ashley Ramsey, Radiocarbon age offsets ontogenetic effects, and potential old carbon contributions from soil organic matter for pre-bomb and modern detritivorous gastropods from central Texas USA, Palaeogeography, Palaeoclimatology, Palaeoecology, Jan 12, 2021. https://doi.org/10.1016/j.palaeo.2021.110671
Burke Leonce, Zygmunt Gryczynski, William Hockaday, Nathaniel Adegboyega, Omar Harvey, Structure-Photochemical Activity Relationships in Fluorophoric Water-Extracted Organic Matter from (un)charred Plant Materials, Environmental Science & Technology – Water. DOI: 10.1021/acsestwater.0c00208
Liu J., Mulenos, M.R., Hockaday, W.C., Sayes, C.M., Sharma, V.K., Ferrate (VI) pretreatment of waters containing natural organic matter, bromide, and iodide: A potential strategy to control soluble lead release from PbO2(s). Chemosphere, January 2021, 128035. DOI: 10.1016/j.chemosphere.2020.128035
Qing Wang, Burke Leonce, Meredith Evans Seeley, Nathaniel F. Adegboyega, Kaijun Lu, William C. Hockaday, and Zhanfei Liu, Elucidating the formation pathway of photo-generated asphaltenes from light Louisiana sweet crude oil after exposure to natural sunlight in Gulf of Mexico, Organic Geochemistry, DOI: 10.1016/orggeochem.2020.104126
Steven J. Hall, Chenglong Ye, Samantha R. Weintraub, William C. Hockaday, Tradeoffs in soil organic carbon molecular composition at the continental scale, Nature Geoscience, September 14, 2020. DOI: 10.1038/s41561-020-0634-x
Liu, J., Lujan, H., Dhungana, B., Hockaday, W.C., Sayes, C.M., Cobb, G.P., Sharma, V.K., Ferrate(VI) pretreatment before disinfection: An effective approach to controlling unsaturated and aromatic halo-disinfection byproducts in chlorinated and chloraminated drinking waters, Environment International, March 4, 2020. DOI: 10.1016/j.envint.2020.105641
Huang, W. Ye, C. Hockaday, W.C., Hall, S.J., Trade-offs in soil carbon protection mechanisms under aerobic and anaerobic conditions, Global Change Biology, March 23, 2020. DOI: 10.1111/gcb.15100
Longbottom, T.L., Hockaday, W.C., Daigle, H., Harvey, O.R., Organic chemical structure relationships to maturity and stability in shales, International Journal of Coal Geology, March 18, 2020. DOI: 10.1016/j.coal.2020.103448
Longbottom, T.L., Hockaday, W.C., Influences of kerogen-rich bedrock on the molecular and isotopic composition of modern soils; implications for the global C cycle, Biogeochemistry, March 14, 2019 DOI: 10.1007/s10533-019-00559-4
Nguyen, M., Goldfarb, J., Plante, A., Lau, B., Hockaday, W.C, Sorption Temperature and the Stability of Iron-Bound Soil Organic Matter, Geoderma, 341, 93-99, 2019. DOI: 10.1016/j.geoderma.2019.01.040
Abney, Rebecca B, Kuhn, T.J., Chow, A., Hockaday, W.C., Fogel, M.L., and Berhe, A.A., Pyrogenic carbon erosion after the Rim Fire, Yosemite National Park: the role of burn severity and slope, Journal of Geophysical Research-Biogeoscience, 124, 2, 432-449, 2019. DOI: 10.1029/2018JG004787
Cusack, D.F., Halterman, S.M., Hockaday, W.C., Tanner, E.V.J., Wright, S.J., Turner, B.L., Decadal-Scale Litter Manipulation Drives Rapid Changes in Mineral-Associated Soil Organic Carbon, Soil Biology & Biochemistry, 124, 199-209, 2018. DOI: 10.1016/j.soilbio.2018.06.005
Harvey, O.R.; Leonce, B.C.; Herbert, B.E., A Flow Adsorption Microcalorimetry-Logistic Modeling Approach for Assessing Heterogeneity of Brønsted-Type Surfaces: Application to Pyrogenic Organic Materials. Environmental Science and Technology 2018, 52 (11), 6167-6176
Nguyen, Michael, Hockaday, W.C., Lau, B.L., Is the adsorption of soil organic matter onto Hematite temperature-dependent?, European Journal of Soil Science, July 12, 2018. DOI:10.1111/ejss.12694
Pyle, L.A., Magee, K.L., Gallagher, M.E., Hockaday, W.C., Masiello, C.A., Short term changes in physical and chemical properties of soil charcoal support enhanced landscape mobility, JGR-Biogeosciences, 2017, DOI: 10.1002/2017JG003938.
Gallagher, M.E., Liljestrand, F.L., Hockaday, W.C., Masiello, C.A., Plant species, not climate, controls biomass O2:CO2 exchange ratios in deciduous and coniferous ecosystems. JGR-Biogeosciences 2017, DOI: 10.1002/2017JG003938.
Gulbranson, E. L., B. F. Jacobs, W. C. Hockaday, M.C. Wiemann, L. A. Michel, Ancient Angiosperm nitrogen uptake strategies inferred from stable isotope analysis of fossil tree rings, Oligocene, Ethiopia, Geology, 2017. DOI:10.1130/G39213.1
Longbottom, T.L., W.C. Hockaday, K.S. Boling, S.I. Dworkin, Effect of ocean oxidation on the chemical structure of marine kerogen, Organic Geochemistry, 106, 1-12, 2017. DOI: 10.1016/j.orggeochem.2017.01.002
Valdez, Z.P., W.C. Hockaday, C.A. Masiello, M.E. Gallagher, G.P. Robertson, Soil Carbon and Nitrogen Responses to Nitrogen Fertilizer and Harvesting Rates in Switchgrass Cropping Systems, Bioenergy Research, 10,1, 2017. DOI: 10.1007/s12155-016-9810-7.
Chang, J., Jugeshwar Singh, Sungshil Kim, W.C. Hockaday, Cheolho Sim, and Sung Joon Kim, Solid-state NMR reveals differential carbohydrate utilization in diapausing Culex pipiens Nature, Scientific Reports, 6, 37350, 2016. DOI: 10.1038/srep37350.
Longbottom, T.L., W.C. Hockaday, K.S. Boling, G.Y. Li, Y. Letourmy, H.L. Dong, S.I. Dworkin, Organic structural properties of kerogen as predictors of source rock type and hydrocarbon potential, Fuel, 184, 792-798, 2016. DOI: 10.1016/j.fuel.2016.07.066
Pyle, L.A., W.C. Hockaday, T. Boutton, K. Zygourakis, T. Boutton, C.A. Masiello, Chemical and isotopic thresholds in charring: implications for the interpretation of charcoal mass and isotopic data, Environmental Science & Technology, 49 (24), 14057–14064, 2015. DOI: 10.1021/acs.est.5b03087
Hockaday, W.C., M. Gallagher, C. Masiello, J. Baldock, C. Iversen, R. Norby, Forest soil carbon oxidation state and oxidative ratio responses to elevated CO2. Journal of Geophysical Research-Biogeoscience 120, 2015. DOI: 10.1002/2015JG003010.
Nesmith, S.M., C.J. Wynveen, E. Dixon, C.W. Matson, B.W. Brooks, W.C. Hockaday, M. Schaum, Exploring educators’ environmental education attitudes and Efficacy: Insights from a Texas Wetland Academy, International Journal of Science Education Part B: Communication and Public Engagement. DOI: 10.1080/21548455.2015.1078519.
Miesel, J., W. Hockaday, R. Kolka, P. Townsend. Soil organic matter composition and quality across fire severity gradients in coniferous and deciduous forests of the southern boreal region, Journal of Geophysical Research-Biogeosciences, 120, 1124–1141. DOI: 10.1002/2015JG002959
Vogel, J., D. He, E. Jokela, W. Hockaday, E. Schuur, The effect of fertilization levels and genetic deployment on soil organic carbon constituents, chemistry, and mean residence time in managed loblolly pine (Pinus taeda L.) forests, Forest Ecology and Management (in press) DOI:10.1016/j.foreco.2015.05.020.
Dhungana, B., C. Becker, B. Zekavat, W. Hockaday, C.K. Chambliss, Characterization of slow pyrolysis bio-oil from pine shavings and corn stover feedstocks by negative electrospray ionization-ion mobility high-resolution mass spectrometry, Energy and Fuels, 29(2), 744-753, 2015, DOI: 10.1021/ef5016389.
Kleber, M.A.; Hockaday, W.C.; Nico, P.S., Characteristics of biochar Macromolecular Properties, Chapter 6, pp109-135. IN: Biochar for Environmental Management: Science and Technology, 2nd Edition, J. Lehmann and S. Joseph, editors. Earthscan publishers, London, 2015.
Yao, J.; Hockaday, W. C.; Murray, D. B.; White, J. D., Changes in fire-derived soil black carbon storage in a subhumid woodland. Journal of Geophysical Research-Biogeosciences 2014, 119 (9), 1807-1819.
Olaitan, A. D.; Zekavat, B.; Dhungana, B.; Hockaday, W. C.; Chambliss, C. K.; Solouki, T., Analysis of volatile organic compound mixtures using radio-frequency ionization/mass spectrometry. Analytical Methods 2014, 6 (14), 4982-4987.
Gallagher, M. E.; Masiello, C. A.; Hockaday, W. C.; Baldock, J. A.; Snapp, S.; McSwiney, C. P., Controls on the oxidative ratio of net primary production in agricultural ecosystems. Biogeochemistry 2014, 121 (3), 581-594.
Nguyen, M.L.; Hockaday, W.C.; Lau, B.L.T., Probing Temperature-Dependent Organo-Mineral Interactions with molecular spectroscopy and Quartz Crystal Microgravimetry, pp. 189-195, in Soil Carbon, Progress in Soil Science series XXVI, Hartemink, A.E., McSweeney, K. (Eds.), Springer, 2014.
Schneider, M. P. W.; Pyle, L. A.; Clark, K. L.; Hockaday, W. C.; Masiello, C. A.; Schmidt, M. W. I., Toward a “Molecular Thermometer” to Estimate the Charring Temperature of Wildland Charcoals Derived from Different Biomass Sources. Environ. Sci. Technol. 2013, 47 (20), 11490-11495.
LeCroy, C.; Masiello, C. A.; Rudgers, J. A.; Hockaday, W. C.; Silberg, J. J., Nitrogen, biochar, and mycorrhizae: Alteration of the symbiosis and oxidation of the char surface. Soil Biology & Biochemistry 2013, 58, 248-254.
Lau, B. L. T.; Hockaday, W. C.; Ikuma, K.; Furman, O.; Decho, A. W., A preliminary assessment of the interactions between the capping agents of silver nanoparticles and environmental organics. Colloids and Surfaces a-Physicochemical and Engineering Aspects 2013, 435, 22-27.
Sun, H.; Hockaday, W. C.; Masiello, C. A.; Zygourakis, K., Multiple Controls on the Chemical and Physical Structure of Biochars. Industrial & Engineering Chemistry Research 2012, 51 (9), 3587-3597.
Koarashi, J.; Hockaday, W. C.; Masiello, C. A.; Trumbore, S. E., Dynamics of decadally cycling carbon in subsurface soils. Journal of Geophysical Research-Biogeosciences 2012, 117.
Kinney, T. J.; Masiello, C. A.; Dugan, B.; Hockaday, W. C.; Dean, M. R.; Zygourakis, K.; Barnes, R. T., Hydrologic properties of biochars produced at different temperatures. Biomass & Bioenergy 2012, 41, 34-43.
Cusack, D. F.; Chadwick, O. A.; Hockaday, W. C.; Vitousek, P. M., Mineralogical controls on soil black carbon preservation. Glob. Biogeochem. Cycle 2012, 26.
Zeng, F. W.; Masiello, C. A.; Hockaday, W. C., Controls on the origin and cycling of riverine dissolved inorganic carbon in the Brazos River, Texas. Biogeochemistry 2011, 104 (1-3), 275-291.
Li, D.; Hockaday, W. C.; Masiello, C. A.; Alvarez, P. J. J., Earthworm avoidance of biochar can be mitigated by wetting. Soil Biology & Biochemistry 2011, 43 (8), 1732-1737.
Lehmann, J.; Rillig, M. C.; Thies, J.; Masiello, C. A.; Hockaday, W. C.; Crowley, D., Biochar effects on soil biota – A review. Soil Biology & Biochemistry 2011, 43 (9), 1812-1836.
Gallagher, M. E.; Hockaday, W. C.; Masiello, C. A.; Snapp, S.; McSwiney, C. P.; Baldock, J. A., Biochemical Suitability of Crop Residues for Cellulosic Ethanol: Disincentives to Nitrogen Fertilization in Corn Agriculture. Environ. Sci. Technol. 2011, 45 (5), 2013-2020.
Nguyen, B. T.; Lehmann, J.; Hockaday, W. C.; Joseph, S.; Masiello, C. A., Temperature Sensitivity of Black Carbon Decomposition and Oxidation. Environ. Sci. Technol. 2010, 44 (9), 3324-3331.
Kane, E. S.; Hockaday, W. C.; Turetsky, M. R.; Masiello, C. A.; Valentine, D. W.; Finney, B. P.; Baldock, J. A., Topographic controls on black carbon accumulation in Alaskan black spruce forest soils: implications for organic matter dynamics. Biogeochemistry 2010, 100 (1-3), 39-56.
Schreiner, K. M.; Filley, T. R.; Blanchette, R. A.; Bowen, B. B.; Bolskar, R. D.; Hockaday, W. C.; Masiello, C. A.; Raebiger, J. W., White-Rot Basidiomycete-Mediated Decomposition of C-60 Fullerol. Environ. Sci. Technol. 2009, 43 (9), 3162-3168.
Hockaday, W. C.; Purcell, J. M.; Marshall, A. G.; Baldock, J. A.; Hatcher, P. G., Electrospray and photoionization mass spectrometry for the characterization of organic matter in natural waters: a qualitative assessment. Limnology and Oceanography-Methods 2009, 7, 81-95.
Hockaday, W. C.; Masiello, C. A.; Randerson, J. T.; Smernik, R. J.; Baldock, J. A.; Chadwick, O. A.; Harden, J. W., Measurement of soil carbon oxidation state and oxidative ratio by C-13 nuclear magnetic resonance. Journal of Geophysical Research-Biogeosciences 2009, 114.
Fernandez, J. M.; Hockaday, W. C.; Plaza, C.; Polo, A.; Hatcher, P. G., Effects of long-term soil amendment with sewage sludges on soil humic acid thermal and molecular properties. Chemosphere 2008, 73 (11), 1838-1844.
Hockaday, W. C.; Grannas, A. M.; Kim, S.; Hatcher, P. G., The transformation and mobility of charcoal in a fire-impacted watershed. Geochimica Et Cosmochimica Acta 2007, 71 (14), 3432-3445.
Hammes, K.; Schmidt, M. W. I.; Smernik, R. J.; Currie, L. A.; Ball, W. P.; Nguyen, T. H.; Louchouarn, P.; Houel, S.; Gustafsson, O.; Elmquist, M.; Cornelissen, G.; Skjemstad, J. O.; Masiello, C. A.; Song, J.; Peng, P.; Mitra, S.; Dunn, J. C.; Hatcher, P. G.; Hockaday, W. C.; Smith, D. M.; Hartkopf-Froeder, C.; Boehmer, A.; Luer, B.; Huebert, B. J.; Amelung, W.; Brodowski, S.; Huang, L.; Zhang, W.; Gschwend, P. M.; Flores-Cervantes, D. X.; Largeau, C.; Rouzaud, J. N.; Rumpel, C.; Guggenberger, G.; Kaiser, K.; Rodionov, A.; Gonzalez-Vila, F. J.; Gonzalez-Perez, J. A.; de la Rosa, J. M.; Manning, D. A. C.; Lopez-Capel, E.; Ding, L., Comparison of quantification methods to measure fire-derived (black/elemental) carbon in soils and sediments using reference materials from soil, water, sediment and the atmosphere. Glob. Biogeochem. Cycle 2007, 21 (3).
Hockaday, W. C.; Grannas, A. M.; Kim, S.; Hatcher, P. G., Direct molecular evidence for the degradation and mobility of black carbon in soils from ultrahigh-resolution mass spectral analysis of dissolved organic matter from a fire-impacted forest soil. Organic Geochemistry 2006, 37 (4), 501-510.
Grannas, A. M.; Hockaday, W. C.; Hatcher, P. G.; Thompson, L. G.; Mosley-Thompson, E., New revelations on the nature of organic matter in ice cores. Journal of Geophysical Research-Atmospheres 2006, 111 (D4).
Trompowsky, P. M.; Benites, V. D.; Madari, B. E.; Pimenta, A. S.; Hockaday, W. C.; Hatcher, P. G., Characterization of humic like substances obtained by chemical oxidation of eucalyptus charcoal. Organic Geochemistry 2005, 36 (11), 1480-1489.
