Publications
* indicates Post-doctoral, graduate, or undergraduate advisee

In Press
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 fores.  Ecological Applications.

McCalley, C. K.* and J. P. Sparks. Controls over NO and NH3 emissions from Mojave Desert soils. Oecologia.

2008
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.

Vallano, D.M.* and J.P. Sparks. Quantifying foliar uptake of gaseous nitrogen dioxide using enriched foliar d15N values. New Phytologist 177:946-955.

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.
 

2007
Joshi, M.V., D.R.D Bignell, E.G. Johnson, J. P. Sparks, D.M. Gibson, R. Loria.  The AraC/XylS regulator TxtR modulates thaxtomin biosynthesis and virulence in Streptomyces scabies. Molecular Microbiology 66(3):633-642.

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.

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.

 Sparks, J. P.  Enhancing the efficiency of nitrogen utilization in plants.  The Quarterly Review of Biology. 82(4): Page 422–422,

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
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.

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.

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
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.

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
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.

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.

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.

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.

Sparks, J. P.  The herbaceous layer in forests of Eastern North America.  The Quarterly Review of Biology 79(3):324.

 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
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.

 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
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.

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.

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
Sparks, J. P., G. S. Campbell, and A. R. Black.  Water content, hydraulic conductivity, and ice formation in winter stems in Pinus contorta:  A TDR case study.  Oecologia 127(4):468‑475.

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
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.

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
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
Sparks, J. P.  The consequences of xylem cavitation in several North American tree species.  Ph.D. Dissertation, Washington State University.

1997
Sparks, J. P. and J. R. Ehleringer.  Leaf carbon isotope discrimination and nitrogen content for riparian trees along elevational transects.  Oecologia 109:362-367