PUBLICATIONS
* indicates Post-doctoral, graduate, undergraduate advisee or Sparks Lab technical staff
2023
[121] Guo, Y., Boughton, E.H., Bohlman, S., Bernacchi, C., Bohlen, P.J., Boughton, R., DeLucia, E., Fauth, J.E., Gomez-Casanovas, N., Jenkins, D.G., Lollis, G., Miller, R.S., Quintana-Ascencio, P.F., Sonnier, G., Sparks, J., Swain, H.M. and J. Qui. Grassland intensification effects cascade to alter multifunctionality of wetlands within meta ecosystems. Nature Communications. 14(1):8267 DOI: 10.1038/s41467-023-44104-2
[120] Meng, Z., Mo, X., Meng, W., Hu, B., Li, H., Lui, J., Lu, X., Sparks, J.P., Wang, Y., Wang, Z. and M. He. Biochar may alter plant communities when remediated the cadmium-contaminated soil in the saline-alkaline wetland. Science of the Total Environment. 899: 165677 DOI: doi.org/10.1016/j.scitotenv.2023.165677
[119] Jensen, K.H.* and J.P. Sparks. Inorganic carbon removal from alkaline soils: an underappreciated influence on soil organic carbon measurements in an elevated CO2 experiment. Biogeochemistry. 165(1): 15-27 DOI: 10.1007/s10533-023-01073-4
[118] Paudel, S., Gomez-Casanovas, N., Boughton, E.H., Chamberlain, S.D., Wagle, P., Peterson, B.L., Bajgain, R., Starks, P.J., Basara, J., Bernacchi, C.J., DeLucia, E.H., Goodman, L.E., Gowda, P.H., Reuter, R., Sparks, J.P., Swain, H.M., Xiao, X. and J.L. Steiner. Intensification differentially affects the delivery of multiple ecosystem services in subtropical and temperate grasslands. Agriculture, Ecosystems & Environment. 348: 108398 DOI: 10.1016/j.agee.2023.108398
[117] Goud, E.M.*, Agrawal, A.A. and J.P. Sparks. A direct comparison of ecological theories for predicting the relationship between traits and growth. Ecology. 104(4): e3986 DOI: 10.1002/ecy.3986
[116] Manning, S.W., Kocik, C., Lorentzen, B. and J.P. Sparks. Severe multi-year drought coincident with Hittite collapse around 1198-1196 BC. Nature. 614(7949): 719-724 DOI: 10.1038/s41586-022-05693-y
2022
[115] Boughton, E.H., Gomez-Casanovas, N., Swain, H., Bernacchi, C., Boughton, R.K., Brinsko, K., Li, H., Rivero, A., DeLucia, E.H. and J.P. Sparks. Patch-burn grazing impacts forage resources in subtropical humid grazing lands. Rangeland Ecology and Management. 84: 10-21 DOI:10.1016/j.rama.2022.02.004
[114] Garcia, J., Gannett, M., Wei, L., Cheng, L., Hu, S., Sparks, J.P., Giovannoni, J. and J. Kao-Kniffin. Selection pressure on the rhizosphere microbiome can alter nitrogen use efficiency and seed yield in Brassica rapa. Communications Biology. 5 (1): 1-11 DOI: 10.1038/s42003-022-03860-5
2021
[113] Goud, E.M.*, Prehmus, S.K.* and J.P. Sparks. Is variation in inter-annual precipitation a mechanism for maintaining plant metabolic diversity? Oecologia. 197(4):1039-1047DOI: 10.1007/s00442-021-05046-y
[112] de Carvalho, D.R., Sparks, J.P., Flecker, A.S., Alves, C.B.M., Moreira, M.Z., and P.S. Pompeu. Nitrogen pollution promotes changes in the niche space of fish communities. Oecologia. 197(2):485-500 DOI:10.1007/s00442-021-05029-z
[111] Johnson, B.B.*, Searle, J.B. and J.P. Sparks. Novel Allometric Estimators Improve Estimation Accuracy of Body Surface Area, Volume, and Surface Area-to-Volume Ratio in Lungless Salamanders (Urodela: Plethodontidae). Herpetologica. 77(3):219-226 DOI: 10.1655/Herpetologica-D-21-00013-1
[110] Delwiche, K.B. et al. (107 additional authors). FLUXNET-CH4: a global, multi-ecosystem dataset and analysis of methane seasonality from freshwater wetlands. Earth System Science data. 13(7):3607-3689 DOI10.5194/essd-13-3607-2021
[109] Knox, SH et al. (58 additional authors). Identifying dominant environmental predictors of freshwater wetland methane fluxes across diurnal to seasonal time scales. Global Change Biology. 27(15):3582-3604 DOI: 10.1111/gcb.15661
[108] Ospina-Bautista, F., Srivastava, D.S., Gonzalez, A.L., Sparks, J.P. and E. Realpe. Predators override rainfall effects on tropical food webs. Biotropica. 53(4):1191-1202 DOI: 10.1111/btp.12961
[107] Cole, R.J., Soper, F.M.*, Litton, C.M., Knauf, A.E., Sparks, K.L.*, Gerow, K.G., Giardina, C.P., and J.P. Sparks. Restoration benefits of soil nutrient manipulation and weeding in invaded dry and wet tropical ecosystems in Hawaiʻi. Restoration Ecology. 29(5): e13390 DOI: 10.1111/rec.13390
[106] Knauf, A.E., Litton, C.M., Cole, R.J. Giardina, C.P, Sparks, J.P., Gerow, K.G., and M.Q. Santiago*. Nutrient use strategy and not competition determines native and invasive species response to changes in soil nutrient availability. Restoration Ecology. 29(5): e13374 DOI: 10.1111/rec.13374
[105] Johnson, B.B.*, Searle, J.B., and J.P. Sparks. Genome size influences adaptive plasticity of water loss, but not metabolic rates, in lungless salamanders. Journal of Experimental Biology. 224(8)/jeb242196 DOI: 10.1242/jeb.242196
[104] Aquino, C.A., Besemer, R.M., DeRito, C.M., Kocian, J., Porter, I.R., Raimondi, P.T., Rede, J.E., Schiebelhut, L.M., Sparks, J.P., Wares, J.P., and I. Hewson, I. Evidence That Microorganisms at the Animal-Water Interface Drive Sea Star Wasting Disease. Frontiers in Microbiology. 11:610009 DOI: 10.3389/fmicb.2020.610009.
[103] Mason, N.A., Unitt, P. and J.P. Sparks. Agriculture induces isotopic shifts and niche contraction in Horned Larks (Eremophila alpestris) of the Colorado Desert. Journal of Ornithology. 162(2):381-393 DOI: 10.1007/s10336-020-01834-0.
2020
[102] Pierre, S., Litton, C.M., Giardina, C.P., Sparks, J.P. and T.J. Fahey. Mean annual temperature influences local fine root proliferation and arbuscular mycorrhizal colonization in a tropical wet forest. Ecology and Evolution. 10(18): 9635-9646 DOI: 10.1002/ece3.6561
[101] de Carvalho, D.R.*, Alves, C.B.M., Flecker, A.S., Sparks, J.P., Moreira, M.Z., and P.S. Pompeu. Using delta N-15 of periphyton and fish to evaluate spatial and seasonal variation of anthropogenic nitrogen inputs in a polluted Brazilian river basin. Ecological Indicators. 115:106372. DOI: 10.1016/j.ecolind.2020.106372.
[100] Litton, C.M., Giardina, C.P., Freeman, K.R., Selmants, P.C., and J.P. Sparks. Impact of Mean Annual Temperature on Nutrient Availability in a Tropical Montane Wet Forest. Frontiers in Plant Science. 11:784. DOI 10.3389/fpls.2020.00784.
[99] Smith, K.J.*, Sparks, J.P., Timmons, Z.L., and M.J. Peterson. Cetacean Skeletons Demonstrate Ecologically Relevant Variation in Intraskeletal Stable Isotopic Values. Frontiers in Marine Science. 7:388. DOI 10.3389/fmars.2020.00388.
[98] Rambal, S., Cavender-Bares, J., Sparks, K.L.*, and J.P. Sparks. Consequences of drought severity for tropical live oak (Quercus oleoides) in Mesoamerica. Ecological Applications. 30(6):10.1002/eap.2135
[97] Eller A.S.D.*, Soper F.M.* and J.P. Sparks. The influence of elevated CO2 on phenology of Arabidopsis thaliana (Brassicaceae) is altered by common air pollutants (NO2 and O3) and soil nitrogen. Journal of the Torrey Botanical Society. 147(2):156-166.
[96] Kariuki S.*, Gallery R.E., Sparks J.P., Gimblett, R. and M.P. McClaran. Soil microbial activity is resistant to recreational camping disturbance in a Prosopis dominated semiarid savanna. Applied Soil Ecology. 147:UNSP 103424.
2019
[95] Goud E.M.*, Sparks J.P., Fishbein M. and A.A. Agrawal. Integrated metabolic strategy: A framework for predicting the evolution of carbon-water tradeoffs within plant clades. Journal of Ecology. 107(4):1633-1644.
[94] Crumsey J.M.*, Searle J.B. and J.P. Sparks. Isotope values of California vole (Microtus californicus) hair relate to historical drought and land use patterns in California, USA. Oecologia. 190(4):769-781.
[93] De Carvalho D.R.*, Flecker A.S., Alves C.B.M., Sparks J.P. and P.S. Pompeu. Trophic responses to aquatic pollution of native and exotic livebearer fishes. Science of the Total Environment. 681:503-515.
[92] Soper F.M.*, MacKenzie R.A., Sharma S., Cole T.G., Litton C.M. and J.P. Sparks. Non-native mangroves support carbon storage, sediment carbon burial, and accretion of coastal ecosystems. Global Change Biology. 25(12):4315-4326.
[91] Smajlovic, I., Wang, D., Turi, M., Qiding, Z., Futo, I., Veres, M., Sparks, K.L., Sparks, J.P., Jaksic, D., Vukovic, A., and M. Vujadinovic. Quantitative analysis and detection of chaptalization and watering down of wine using isotope ratio mass spectrometry. 42nd Congress of Wine and Vine. 15:02007.
2018
[90] Soper F.M.*, Chamberlain S.D.*, Crumsey J.M.*, Gregor, S.*, Derry L.A. and J.P. Sparks. Biological cycling of mineral nutrients in a temperate forested shale catchment. JGR-Biogeosciences. 123(10):3204-3215.
[89] Gomez-Casanovas N., DeLucia N.J., Bernacchi C.J., Boughton E.H., Sparks J.P., Chamberlain S.D.*, and E.H. DeLucia. Grazing alters net ecosystem C fluxes and the global warming potential of a subtropical pasture. Ecological Applications. 28(2):557-572.
[88] Ramirez-Valiente, J.A., Deacon, N.J., Etterson, J., Center, A., Sparks, J.P., Sparks, K.L.*, Longwell, T., Pilz, G., and J. Cavender-Bares. Natural selection and neutral evolutionary processes contribute to genetic divergence in leaf traits across a precipitation gradient in the tropical oak Quercus oleoides. Molecular Ecology. 27(9):2176-2192.
[87] Goud E.M.* and J.P. Sparks. Leaf stable isotopes suggest shared ancestry is an important driver of functional diversity. Oecologia. 187(4):967-975.
2017
[86] Chamberlain S.D.*, Groffman P.M., Boughton E.H., Gomez-Casanovas N., DeLucia E.H., Bernacchi C.J., and J.P. Sparks. The impact of water management practices on subtropical pasture methane emissions and ecosystem service payments. Ecological Applications. 27(4):1199-1209.
[85] Pierre, S.*, Hewson, I., Sparks, J.P., Litton, C.M., Giardina, C., Groffman, P.M., and T.J. Fahey. Ammonia oxidizer populations vary with nitrogen cycling across a tropical montane mean annual temperature gradient. Ecology. 98(7):1896-1907.
[84] Ramirez-Valiente, J.A., Center, A., Sparks, J.P., Sparks, K.L., Etterson, J.R., Longwell, T., Pilz, G., and J. Cavender-Bares. Population-Level Differentiation in Growth Rates and Leaf Traits in Seedlings of the Neotropical Live Oak Quercus oleoides Grown under Natural and Manipulated Precipitation Regimes. Frontiers in Plant Science. 8: Article 585.
[83] Long, M.S., Litton, C.M., Giardina, C.P., Deenik, J., Cole, R.J. and J.P. Sparks. Impact of nonnative feral pig removal on soil structure and nutrient availability in Hawaiian tropical montane wet forests. Biological Invasions. 19(3):749-763.
[82] Soper F.M.*, McCalley C.K.*, Sparks K.L.* and J.P. Sparks. Soil carbon dioxide emissions from the Mojave desert: isotopic evidence for a carbonate source. Geophysical Research Letters. 44(1):245-251.
[81] Hasselquist, E.M.*, Hasselquist N.J., Sparks J.P. and C. Nilsson. Recovery of nitrogen cycling in riparian zones after stream restoration using delta N-15 along a 25-year chronosequence in northern Sweden. Plant and Soil. 410(1-2): 423-436.
[80] Low C. and J.P. Sparks. Insect herbivory is associated with microsite quality. Journal of the Torrey Botanical Society. 144(1):26-34.
2016
[79}Meek, K., Derry, L.A., Sparks J.P. and L. Cathles. Sr-87/Sr-86, Ca/Sr, and Ge/Si ratios as tracers of solute sources and biogeochemical cycling at a temperate forested catchment, central Pennsylvania, USA. Chemical Geology. 445:84-102.
[78] Leigh K.L.*, Sparks J.P., and W.E. Bemis. Food preferences of Atlantic hagfish, Myxine glutinosa, assessed by experimental baiting of traps. Copeia. 104(3):623-627.
[77] Linderholm A., D. Spencer, V. Battista, L. Frantza, R. Barnetta, R. Fleischer, H.F. James, D. Duffy, J.P. Sparks, D.R. Clements, L. Andersson, K. Dobney, J. Leonard, G. Larson. A Novel MC1R allele for black coat colour reveals the Polynesian ancestry and hybridisation patterns of Hawaiian feral pigs. Royal Society Open Science. 3(9):Article number 160304.
[76] Soper F.M.*, Boutton T.W., Groffman P.W., and J.P. Sparks. Nitrogen trace gas fluxes from a subtropical, semi-arid savanna under woody legume encroachment. Global Biogeochemical Cycles. 30(5):614-628.
[75] Soper F.M.*, Groffman P.M, and J.P. Sparks. Denitrification in a subtropical, semi-arid North American savanna: field measurements and intact soil core incubations. Biogeochemistry. 128(1-2):257-266.
[74] Chamberlain, S.D.*, Ingraffea, A.R., and J.P. Sparks. Sourcing methane and carbon dioxide emissions from a small city: Influence of natural gas leakage and combustion. Environmental Pollution. 218:102-110.
[73] Chamberlain S.D.*, Walter M.T., Gomez-Casanovas N., Boughton E.H., Bernacchi C.J., DeLucia E.H., Groffman P.M., Keel E.W., and J.P Sparks. Influence of transient flooding on methane fluxes from subtropical pastures. JGR Biogeosciences. 121(3):965-977.
[72] S.M. Collins*, J.P. Sparks, S.A. Thomas, S.A. Wheatley, and A.S. Flecker. Increased light availability reduces the importance of bacterial carbon in headwater stream food Webs. Ecosystems. 19(3):396-410.
[71] K.K. Coe* and J.P. Sparks. Cyanobacteria associations in temperate forest bryophytes revealed by δ15N analysis. Journal of the Torrey Botanical Society. 143(1):50-57.
[70] Craig, E.*, T. King, J.P. Sparks, and P. Curtis. Aquaculture depredation by Double-crested Cormorants breeding in Eastern North America. Journal of Wildlife Management 80:57-62.
2015
[69] Craig, E.*, S. Elbin, J.P. Sparks, and P. Curtis. Identifying important foraging habitats for colonial waterbirds in an urban estuary: A stable isotope approach. Waterbirds 38:330-338.
[67] Craig, E.*, B. Dorr, K. Hanson-Dorr, J.P. Sparks, and P. Curtis. Isotopic discrimination in the Double-crested Cormorant. PLOS ONE 10:e0140946.
[66] C. L. Goodale, G. Fredriksen, M. S. Weiss, C. K. McCalley*, J. P. Sparks, and S. A. Thomas. Soil processes drive seasonal variation of 15N retention in a deciduous forested catchment. Ecology. 96(10):2653-2668.
[65] Chamberlain, S.D.* and J.P. Sparks. Underlying ecosystem emissions exceed cattle-emitted methane from subtropical lowland pastures. Ecosystems. 18(6):933-945.
[64] T. Butler, R. Marino, D. Schwede, R. W. Howarth, J. P. Sparks and K. L. Sparks*.
Atmospheric ammonia measurements at low concentration sites in the northeastern USA: implications for total nitrogen deposition and comparison with CMAQ model estimates. Biogeochemistry. 122(2):191-210.
[63] Soper F.M.*, T.W. Boutton, and J. P. Sparks. Investigating patterns of symbiotic nitrogen fixation during vegetation change from grassland to woodland using fine scale δ15N measurements. Plant, Cell and Environment. 38(1):89-100.
[62] D. L. Lombardozzi*, S. Levis, G. Bonan, P.G. Hess and J.P. Sparks. The influence of chronic ozone exposure on global carbon and water cycles. Journal of Climate. 28(1):292-305
2014
[61] L.E. Nave, J.P. Sparks, J. Le Moine, B.S. Hardiman, K.J. Nadelhoffer, B.D. Strahm*, and P.S. Curtis. Changes in soil nitrogen cycling in a northern temperate forest ecosystem during succession. Biogeochemistry. 121(3):471-488.
[60] K. K. Coe* and J. P. Sparks. Physiology-based prognostic modeling of the influence of changes in precipitation on a keystone dryland plant species. Oecologia. 176(4):933-942.
[59] L.C. Mejíaa, E.A. Herre, J.P. Sparks, K. Winter, M.N Garcia, S. A. Van Bael, J. Stitt, Z. Shi, Y. Zhang, M.J. Guiltinan, and S.N. Maximova. Pervasive effects of a dominant foliar endophytic fungus on host genetic and phenotypic expression in a tropical tree. Frontiers in Microbiology. 5:479.
[58] D. R. Caulton, P. B. Shepson, R. L. Santoro, J. P. Sparks, R. W. Howarth, A. Ingraffea, M. O. Cambaliza, C. Sweeney, A. Karion, K. J. Davis, B. Stirm, S. Montzka, and B. Miller. Toward a better understanding and quantification of methane emissions from shale gas development. PNAS. 111(17): 6237-6242.
[57] K.K. Coe*, J.P. Sparks, & J. Belnap. Physiological ecology of dryland biocrust mosses. In Advances in Photosynthesis and Respiration: Photosynthesis in Bryophytes and Early Land Plants. 37:291-308.
2013
[56] D. L. Lombardozzi*, J. P. Sparks, and G. Bonan. Integrating O3 influences on terrestrial processes: Photosynthetic and stomatal response data available for large-scale modeling. Biogeosciences. 10(11):6815-6831.
[55] R. C. Bell, A. Belmaker, J. M. Brown, C. S. Couch, K. S. Francisco, M. Manuel, K. M. Marchetto, J. L. Simonis, R. Q. Thomas, J. P. Sparks. Effectiveness of Erythrina gall wasp biocontrol and implications for the recovery of threatened Wiliwili trees (Fabaceae: Erythrina sandwicensis). Journal of the Torrey Botanical Society. 140(2):215–224.
[54] D. M. Vallano* and J. P. Sparks. Foliar δ15N patterns influenced by foliar nitrogen uptake, soil δ15N, and mycorrhizae along a regional nitrogen deposition gradient. Oecologia. 172(1): 47-58.
[53] I. Smajlović, K.L. Sparks, J.P. Sparks, I. Leskošek Čukalović & S. Jović. Ethanol isotope method (EIM) for uncovering illegal wine. Natural Product Research. 27(6): 513-517
2012
[52] D. L. Lombardozzi*, S. Levis, G. Bonan, and J. P. Sparks. Predicting photosynthesis and transpiration responses to ozone: decoupling modeled photosynthesis and stomatal conductance. Biogeosciences. 9(8): 3113-3130.
[51] Hamilton J., A. R. Zangerl, M. Berenbaum, J. P. Sparks, L. Elich, A. Gattis, A. Eisenstein, and E. DeLucia. Elevated atmospheric CO2 alters arthropod community structure in a forest understory. Acta Oecologia. 43: 80-85.
[50] K. K. Coe*, J. Belnap, and J. P. Sparks. Precipitation-driven carbon balance controls survivorship in the desert biocrust moss Syntrichia caninervis. Ecology. 93(7): 1626-1636.
[49] S. C. Reed, K. K. Coe*, J. P. Sparks, D. C. Housman, T. J. Zelikova, and J. Belnap. Changes to dryland rainfall result in rapid moss mortality and altered soil fertility. Nature-Climate Change. 2:752–755.
[48] K. K. Coe*, J. Belnap, E. E. Grote, and J. P. Sparks. Physiological ecology of the desert biocrust moss Syntrichia caninervis following ten years exposure to elevated CO2: evidence for enhanced photosynthetic thermotolerance. Physiologia Plantarum. 144(4): 346-356
[47] D. L. Lombardozzi*, J. P. Sparks, G. Bonan and S. Levis. Ozone exposure causes a decoupling of conductance and photosynthesis: implications for the Ball-Berry stomatal conductance model. Oecologia. 169(3): 651-659
2011
[46] L.E. Nave, C.M. Gough, K. Maurer, G. Bohrer, B.S. Hardiman, J. Le Moine, A.B. Munoz, K.J. Nadelhoffer, J. P. Sparks, B.D.Strahm*, C.S. Vogel, and P.S. Curtis. Disturbance, decoupling and resilience of carbon and nitrogen cycles in a northern temperate forest: initial results from the Forest Accelerated Succession ExperimenT (FASET). JGR-Biogeosciences. 116: G04016, doi:10.1029/2011JG001758.
[45] Baker D.M.*, K. Kim, J. Andras, J. P. Sparks. Light-mediated 15N fractionation in Caribbean gorgonian octocorals. Coral Reefs. 30: 709-717.
[44] McCalley C.K.*, B. D. Strahm*, K. L. Sparks*, A. S.D. Eller*, and J. P. Sparks. The effect of long-term exposure to elevated CO2 on nitrogen gas emissions from Mojave Desert soils. Journal of Geophysical Research-Biogeosciences. 116: G03022, doi:10.1029/2011JG001667.
[43] Sparks, J. P., S. Chandra, L. A. Derry, M. V. Parthasarathy, C. S. Daugherty, and R. Griffin*. The distribution of silicon and germanium in tissues of annual blue grass (Poa annua L.): Evidence for differential and active transport from SIMS ion microscopy. Biogeochemistry. 104: 237-249.
[42] Eller, A. S. D.*, K. L. McGuire and J. P. Sparks. Responses of sugar maple and hemlock seedlings to elevated carbon dioxide under altered above- and belowground nitrogen sources. Tree Physiology. 31: 391-401.
2010
[41] J. T. Anderson*, J. P. Sparks and M. A. Geber. Phenotypic plasticity despite source–sink population dynamics in a long-lived perennial plant. New Phytologist. 188: 856–867.
[40] E. E. Grote, J. Belnap, D. Hausman, and J. P. Sparks. Carbon exchange in biological soil crust communities under differential temperatures and soil water contents: implications for global change. Global Climate Change. 16: 2763–2774
[39] Monson R. K., M. R. Prater, J. Hu, S. P. Burns, J. P. Sparks, K. L. Sparks, L. E. Scott-Denton. Tree species effects on ecosystem water-use efficiency in a high-elevation, subalpine forest. Oecologia. 162(2):491-504.
2009 [38] McCalley, C. K.* and J. P. Sparks. Abiotic gas formation drives nitrogen loss from a desert ecosystem. Science. 326(5954):837-840.
[37] Sparks, J.P. Ecological ramifications of the direct foliar uptake of nitrogen. Oecologia. 159(1):1-13.
[36] Agrawal A. A., M. Fishbein, R. Jetter, J. Salminen, J. B. Goldstein, A. E. Freitag* and J. P. Sparks. Phylogenetic ecology of leaf surface traits in the milkweeds (Asclepias spp.): chemistry, ecophysiology, and insect behavior. New Phytologist. 183:848-867.
[35] Barney J.N.*, J. P. Sparks, J. Greenberg, T. H. Whitlow, and A. Guenther. Biogenic volatile organic compounds from an invasive species: impacts on plant-plant interactions. Plant Ecology. 203:195-205.
2008
[34] Miller, C. T.*, W. B. Miller, and J.P. Sparks. Comparison of total chlorophyll content with chlorophyll meter readings in Oxalis regenellii. HortScience. 43:1097.
[33] Yi, C., D. E. Anderson, A. A. Turnipseed, S. P. Burns, J. P. Sparks, D. I. Stannard, and R. K. Monson. The contribution of advective fluxes to net ecosystem CO2 exchange in a high-elevation, subalpine forest. Ecological Applications. 18(6):1379-1390.
[32] McCalley, C. K.* and J. P. Sparks. Controls over NO and NH3 emissions from Mojave Desert soils. Oecologia. 156:871-881.
[31] Johnson E. G., J.P. Sparks, B. Dzikovski, B.R. Crane, D.M. Gibson, and R. Loria. Plant-pathogenic Streptomyces species produce nitric oxide synthase derived nitric oxide in response to host signals. Chemistry & Biology. 15(1):43-50.
[30] Vallano, D.M.* and J.P. Sparks. Quantifying foliar uptake of gaseous nitrogen dioxide using enriched foliar d15N values. New Phytologist. 177:946-955.
[29] Sparks, J. P., A. J. Walker, A. A. Turnipseed, and A. Guenther. Dry nitrogen deposition estimates over a forest experiencing free air CO2 enrichment. Global Change Biology. 14(4):768-781.
[28] Joshi, M.V., D.R.D Bignell, E.G. Johnson, P. Sparks, D.M. Gibson, and R. Loria. The AraC/XylS regulator TxtR modulates thaxtomin biosynthesis and virulence in Streptomyces scabies. Molecular Microbiology. 66(3):633-642.
[27] Derry, L. A., J. P. Sparks and S. Chandra. Ge/Si fractionation by higher plants: mechanisms and applications to biogeochemical cycles. Geochemica et Cosmochimica Acta. 71(15):A219-A219 Suppl. S.
[26] Canny, M. J., J. P. Sparks, C. X. Huang, and M. L. Roderick. Air embolisms exsolving in the transpiration water – the effect of constrictions in the xylem pipes. Functional Plant Biology. 34(2):95-111.
[25] Sparks, J. P. Enhancing the efficiency of nitrogen utilization in plants. The Quarterly Review of Biology. 82(4): 422–422.
[24] Vallano, D. M.* and J. P. Sparks. Foliar 15N signatures as indicators of foliar uptake of atmospheric nitrogen pollution. In: Stable Isotopes as Indicators of Environmental Changes, T. E. Dawson (ed.). pp. 93-109. Academic Press.
2006
[23] Eller, A. S. D.* and J. P. Sparks. Predicting leaf-level fluxes of ozone and nitrogen dioxide: The relative roles of diffusion and biochemical processes. Plant, Cell, and Environment. 29(9):1742‑1750.
[22] Teklemariam, T. A.* and J. P. Sparks. Leaf fluxes of NO and NO2 in four herbaceous plant species: The role of ascorbic acid. Atmospheric Environment. 40(12):2235‑2244.
[21] Turnipseed, A. A., L. G. Huey, E. Nemitz, R. Stickel, J. Higgs, D. J. Tanner, D. L. Slusher, J. P. Sparks, F. Flocke, and A. Guenther. Eddy covariance fluxes of Peroxyacetyl nitrates (PANs) and NOy to a coniferous forest. Journal of Geophysical Research-Atmospheres. 111:D09304, doi:10.1029/2005JD006631.
2005
[20] Holland, E. A., S. B. Bertman, M. A. Carroll, A. B. Guenther, P. B. Shepson, J. P. Sparks, and J. Lee-Taylor. U.S. nitrogen science plan focuses collaborative efforts. EOS. 86(27):253-260.
[19] Monson, R. K., J. P. Sparks, T. N. Rosenstiel, L. E. Scott-Denton, T. E. Huxman, P. C. Harley, A. A. Turnipseed, S. P. Burns, B. Backlund, and J. Hu. Climatic influences on net ecosystem CO2 exchange during the transition from wintertime carbon source to springtime carbon sink in a high-elevation, subalpine forest. Oecologia. 146(1):130-147.
2004
[18] Althoff, D. M., K. A. Segraves, and J. P. Sparks. Characterizing the interaction between the bogus yucca moth and yuccas: Do bogus yucca moths impact yucca reproductive success? Oecologia. 140(2):321‑327.
[17] Angeles, G., B. Bond, J. S. Boyer, T. Brodribb, J. R. Brooks, M. J. Burns, J. Cavender‑Bares, M. Clearwater, H. Cochard, J. Comstock, S. D. Davis, J. C. Domec, L. Donovan, F. Ewers, B. Gartner, U. Hacke, T. Hinckley, N. M. Holbrook, H. G. Jones, K. Kavanagh, B. Law, J. Lopez-Portillo, C. Lovisolo, T. Martin, J. Martinez-Vilalta, S. Mayr, F. C. Meinzer, P. Melcher, M. Mencuccini, S. Mulkey, A. Nardini, H. S. Neufeld, J. Passioura, W. T. Pockman, R. B. Pratt, S. Rambal, H. Richter, L. Sack, S. Salleo, A. Schubert, P. Schulte, J. P. Sparks, J. Sperry, R. Teskey, and M. Tyree. The cohesion-tension theory. New Phytologist. 163(3):451‑452.
[16] Sparks, J. P. Plant uptake of reactive nitrogen. In: Studying Forest Canopies from Above: The International Canopy Crane Network, Y. Basset, V. Horlyck, and J. Wright (eds.). UNEP & Smithsonian Institution. ISBN 9962-614-05-8.
[15] Sparks, J. P. Photosynthesis and autotrophic energy flows. In: Encyclopedia of Energy, C. S. Cleveland (ed.). Elsevier, Inc., New York, volume 5, pp. 9-16.
[14] Sparks, J. P. The herbaceous layer in forests of Eastern North America. The Quarterly Review of Biology. 79(3):324.
[13] Teklemariam, T. A.* and J. P. Sparks. Gaseous fluxes of peroxyacetyl nitrate (PAN) into plant leaves. Plant, Cell, and Environment 27(9):1149-1158.
2003
[12] Huxman, T. E., A. A. Turnipseed, J. P. Sparks, P. C. Harley, and R. K. Monson. Temperature as a control over ecosystem CO2 fluxes in a high-elevation, subalpine forest. Oecologia. 134(4):537-546.
[11] Sparks, J. P., J. M. Roberts, and R. K. Monson. The uptake of gaseous organic nitrogen by leaves: A significant global nitrogen transfer process. Geophysical Research Letters. 30(23):2189.
2002
[10] Brooks, J. R., N. Buchmann, S. Phillips, B. Ehleringer, R. D. Evans, M. Lott, L. A. Martinelli, W. T. Pockman, D. R. Sandquist, J. P. Sparks, L. Sperry, D. G. Williams, and J. R. Ehleringer. Heavy and light beer: A carbon isotope approach to detect C4 carbon in beers of different origins, styles and prices. Journal of Agricultural and Food Chemistry. 50(22):6413-6418.
[9] Monson, R. K., A. A. Turnipseed, J. P. Sparks, P. C. Harley, L. E. Scott-Denton, K. L. Sparks, and T. E. Huxman. Carbon sequestration in a high elevation, subalpine forest. Global Change Biology. 8(5):459-478.
[8] Thornton, P. E., B. E. Law, H. L. Gholz, K. L. Clark, E. Falge, D. S. Ellsworth, A. H. Goldstein, R. K. Monson, D. Hollinger, M. Falk, J. Chen, and J. P. Sparks. Modeling and measuring the effects of disturbance history and climate on carbon and water budgets in evergreen needleleaf forests. Agricultural and Forest Meteorology. 113(1-4):185-222.
2001
[7] Sparks, J. P., G. S. Campbell, and R. A. Black. Water content, hydraulic conductivity, and ice formation in winter stems in Pinus contorta: A TDR case study. Oecologia. 127(4):468‑475.
[6] Sparks, J. P., R. K. Monson, K. L. Sparks, and M. Lerdau. Leaf uptake of nitrogen dioxide (NO2) in a tropical wet forest: Implications for tropospheric chemistry. Oecologia. 127(2):214-221.
2000
[5] Sparks, J. P. and R. A. Black. Annual patterns of xylem embolism and resistance to tension-induced xylem cavitation in coniferous trees from upper and lower treeline. Journal of Arctic, Antarctic and Alpine Research. 32:101-106.
[4] Sparks, J. P., G. S. Campbell, and R. A. Black. Liquid water content of wood tissue at temperatures below 0 ˚C. Canadian Journal of Forest Research. 30:624-630.
1999
[3] Sparks, J. P. and R. A. Black. Regulation of water loss in populations of Populus trichocarpa: The role of stomatal control in preventing xylem cavitation. Tree Physiology. 19:453-459.
1998
[2] Sparks, J. P. The consequences of xylem cavitation in several North American tree species. Ph.D. Dissertation, Washington State University.
1997
[1] Sparks, J. P. and J. R. Ehleringer. Leaf carbon isotope discrimination and nitrogen content for riparian trees along elevational transects. Oecologia. 109:362-367