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Climate Research Publications, Presentations, and Posters



The list below is a comprehensive list of our recent work. Some of our publications are linked as PDF files. If you don't find what you are looking for, please contact Nate McDowell.



Testimony


Testimony of Dr. Nathan McDowell on environmental research at the Department Of Energy before the Subcommittee on Energy and the Environment Committee on Science and Technology, U.S. House Of Representatives, June 9, 2009. (PDF File - 423 KB)



Published


2010

Bickford, Christopher P., David T. Hanson, and Nate G. McDowell (2010), Influence of diurnal variation in mesophyll conductance on modelled 13C discrimination: results from a field study, Journal of Experimental Botany, Vol. 61, No. 12, pp. 3223-3233, doi:10.1093/jxb/erq137 (PDF File - 500 kb)

Fisher, Rosie, Nate McDowell, Drew Purves, Paul Moorcroft, Stephen Sitch, Peter Cox, Chris Huntingford, Patrick Meir and F. Ian Woodward (2010), Assessing uncertainties in a second-generation dynamic vegetation model caused by ecological scale limitations, New Phytologist, 187: 666-681 (PDF File - 4.1 Mb)

McDowell, N.G. and S. Sevanto (2010) The mechanisms of carbon starvation: how, when, or does it even occur at all? New Phytologist, 186: 264-266.

McDowell, N.G., C. Allen, L. Marshall (2010), Growth, carbon isotope discrimination, and mortality across a ponderosa pine elevation transect. Global Change Biology, 16, 399-415.


2009

Adams, H.D., A.K. Macalady, D.D. Breshears, C.D. Allen, N.L. Stephenson, S.R. Saleska, T.E. Huxman, N.G. McDowell. Earth system consequences of the emerging phenomenon of extensive climate induced tree mortality. EOS, Trans, AGU, 91:153-154

Powers H.H., J. Hunt, D. Hanson, N. G. McDowell. A dynamic soil chamber system coupled with a tunable diode laser for online measurements of δ13C and δ18O of soil respired CO2. Rapid Communications in Mass Spectrometry, 24: 243-253.

Bickford, Christopher P., Nate G. McDowell, Erik B. Erhardt and David T. Hanson (2009), High-frequency field measurements of diurnal carbon isotope discrimination and internal conductance in a semi-arid species, Juniperus monosperma, Plant, Cell and Environment doi: 10.1111/j.1365-3040.2009.01959.   (PDF File - 672 KB)

Allen, CD, A. Macalady, H. Chenchouni, D. Bachelet, N. McDowell, M. Vennetier, P. Gonzales, T. Hogg, A. Rigling, D. Breshears, R. Fensham, Z. Zhang, T. Kitzberger, J. Lim, J. Castro, G. Allard, S. Running, A. Semerci, N. Cobb, (2009), Climate-induced forest mortality: a global overview of emerging risks. Forest Ecology and Management, doi:10.1016/j.foreco.2009.09.001.

Calvo-Alvarado, J. C., N. G. McDowell, and R. H. Waring (2009), Allometric relationships predicting foliar biomass and leaf area: sapwood area ratio from tree height in five Costa Rican rain forest species, Tree Physiology 28, pp. 1601 - 1608.   (PDF File - 236 KB)

Engel, S., H.M. Lease, N.G. McDowell, B.O. Wolf (2009), Resource use by a grasshopper community quantified using tunable diode laser spectroscopy to measure breath δ13C. Rapid Communications in Mass Spectrometry, 23, 1281-1286.

Breshears D.D., O.B. Myers, C.W. Meyer, F.J. Barnes, C.B. Zou, C.D. Allen, N.G. McDowell, W.T. Pockman (2009), Tree die-off in response to global-change-type drought: mortality insights from a decade of plant water potential measurements. Frontiers in Ecology and Environment, 7, doi:10.1890/080016. (PDF File - 360 KB)

Bickford, C.P, N.G. McDowell, E. B. Eberhardt, D.T. Hanson (2009), High resolution field measurements of diurnal carbon isotope discrimination and internal conductance in a semi-arid species, Juniperus monosperma. Plant, Cell and Environment, doi: 10.1111/j.1365-3040.2009.01959.x

Engel, Sophia, Hilary M. Lease, Nate G. McDowell, Alyssa H. Corbett, and Blair O. Wolf (2009), The use of tunable diode laser absorption spectroscopy for rapid measurements of the δ13C of animal breath for physiological and ecological studies, Rapid Communications in Mass Spectrometry. 23: 1281-1286, DOI: 10.1002/rcm.4004. (PDF File - 471 KB)

McDowell, N.G., C. Allen, L. Marshall. Growth, carbon isotope discrimination, and mortality across a ponderosa pine elevation transect. Global Change Biology, in press.


2008

Engel, S., H.M. Lease, N.G. McDowell, B.O. Wolf (2008), Resource use by a grasshopper community quantified using tunable diode laser spectroscopy to measure breath δ13C. Rapid Communications in Mass Spectrometry, in press.

Kolb, Thomas E. and Nate G. McDowell (2008), Tree Ecophysiology Research at Taylor Woods, in Proceedings RMRS-P-53CD. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station.   (PDF File - 484 KB)

Calva-Alvarado, J.C., N. G. McDowell, R.H. Waring (2008), Allometric relationships to predict foliar biomass and leaf area:sapwood area ratio in relation to tree height for five wet tropical rain forest species in Costa Rica. Tree Physiology, in press.

McDowell, N.G., S.A. White, W.T. Pockman (2008), Transpiration and stomatal conductance across a steep climate gradient in the southern Rocky Mountains. Ecohydrology, 1: 193-204

Uehlein, Norbert, Beate Otto, David T. Hanson, Matthias Fischer, Nate McDowell, and Ralf Kaldenhoffa (2008),, Function of Nicotiana tabacum Aquaporins as Chloroplast Gas Pores Challenges the Concept of Membrane CO2 Permeability, The Plant Cell Preview, American Society of Plant Biologists.   (PDF File - 648 KB)

McDowell, Nate, William T. Pockman, Craig D. Allen, David D. Breshears, Neil Cobb, Thomas Kolb, Jennifer Plaut, John Sperry, Adam West, David G. Williams, and Enrico A. Yepez (2008), Mechanisms of plant survival and mortality during drought: why do some plants survive while others succumb to drought?, New Phytologist 178: 719-739.   (PDF File - 740 KB)

McDowell, Nate, Dennis Baldocci, Margareet Barbour, Chris Bickford, Matthias Cuntz, Dave Hanson, Alexander Knohl, Heath Powers, Thomas Rahn, Jim Randerson, William J. Riley, Chris Still, Kevin Tu, and Adrian Walcroft (4 March 2008), Understanding the Stable Isotope Composition Rof Biosphere-Atmosphere CO2 Exchange, EOS, Vol. 89, No. 10.   (PDF File - 208 KB)

Breshears, D.D., N. G. McDowell, K.L. Goddard, K.E. Dayem, S.N. Martens, C.W. Meyer (2008), Drought recovery via foliar absorption of intercepted rainfall bypasses soil water uptake. Ecology, 89: 41-47.


2007

Kolb, T. E., J. K. Agee, P. Z. Fule, N.G. McDowell, K. Pearsone, A. Salaf, R.H. Waring (2007), Perpetuating Old Ponderosa Pine, Forest Ecology and Management 249 pp. 141-157.   (PDF File - 1.2 MB)

McDowell, N.G., H.D. Adams, J.D. Bailey, and T.E. Kolb. (2007), The response of ponderosa pine growth efficiency and leaf area index to a forty-year stand density experiment. Canadian Journal of Forest Research, 37: 343-355.

McDowell, N. G., H. D. Adams, J. D. Bailey, T. E. Kolb (2007), The Role of Stand Density on Growth Efficiency, Leaf Area Index, and Resin Flow in Southwestern Ponderosa Pine Forests, Canadian Journal of Forest Research Volume 37, pp. 343-355.   (PDF File - 92 KB)

Barbour, M.M., G.D. Farquhar, D. Hanson, C. Bickford, H. Powers, N.G. McDowell (2007), A new measurement technique reveals temporal variation in δ18O of leaf respired CO2. Plant, Cell and Environment, 30: 456-468.

Barbour, Margaret M., Nate G. McDowell, Guillaume Tcherkez, Christopher P. Bickford, and David T. Hanson (2007), A new measurement technique reveals rapid post-illumination changes in the carbon isotope composition of leaf-respired CO2, Plant, Cell and Environment 30, 469-482 doi:10.1111/j.1365-3040.2007.01634.   (PDF File - 392 KB)


2006

Flexas, Jaume, Miquel Ribas-Carbo, David T. Hanson, Josefina Bota, Beate Otto, Josep Cifre, Nate McDowell, Hipolito Medrano, and Ralf Kaldenhoff (2006), Tobacco aquaporin NtAQP1 is involved in mesophyll conductance to CO2 in vivo, The Plant Journal 48, 427-439, doi: 10.1111/j.1365-313X.2006.02879.   (PDF File - 440 KB)

Newman, B.D., Wilcox, B.P., Archer S., Breshears, D.D., Dahm, C.N., Duffy, C.J., McDowell, N.G., Phillips, F.M., Scanlon, B.R., and Vivoni, E.R (2006), The ecohydrology of arid and semi-arid environments: a scientific vision. Water Resources Research. 42: W06302.

McDowell, Nate G., Henry D. Adams, John D. Bailey, Marcey Hess, and Thomas E. Kolb (2006), Homeostatic Maintenance of Ponderosa Pine Gas Exchange in Response to Stand Density Changes, Ecological Applications, 16(3), pp. 1164-1182.   (PDF File - 280 KB)


2005

Roden, J., D. Bowling, N. McDowell, B. Bond, J. Ehleringer (2005), Carbon and oxygen isotope ratios of tree ring cellulose along a precipitation transect in Oregon, USA. Journal of Geophysical Research-Biogeosciences, 110, doi:10.1029/2005JG000033.

McDowell, N.G., J. Licata, and B.J. Bond (2005), Environmental sensitivity of gas exchange parameters in different-sized trees. Oecologia. 145: 9-20


2004

McDowell, N.G., D.R. Bowling, A. Schauer, B.J. Bond, J. Irvine, B.E. Law, J.R. Ehleringer (2004), Associations between the carbon isotope ratios of ecosystem respiration, water availability, and canopy conductance. Global Change Biology 10, 1767-1784. 19. Winner, W.E., Thomas, S., Berry, J., Bond, B.J., Cooper, C.E., Hinckley, T.M., Ehleringer, J.R., Fessenden, J.E. Lamb, B., McCarthy, S., McDowell, N.G., Phillips, N., Williams, M. 2004. Canopy carbon gain and water use: Analysis of old-growth conifers in the Pacific Northwest. Ecosystems. 7, 482-497.

McDowell, N.G., D.B. Bowling, B.J. Bond, J. Irvine, B.E. Law, P. Anthoni, and J.R. Ehleringer (2004), Response of the carbon isotopic content of ecosystem, leaf and soil respiration to meteorological and physiological driving factors in a Pinus ponderosa ecosystem. Global Biogeochemical Cycles. 18(1) 10.1029.

Phillips, N., B.J. Bond, N.G. McDowell, M.G. Ryan, A. Schauer (2004), Leaf area compounds height-related hydraulic costs of water transport in Oregon white oak trees. Functional Ecology. 17: 832-840.

Bowling, D.R., N.G. McDowell, J.M. Welker, B.J. Bond, B.E. Law, and J.R. Ehleringer (2004), Oxygen isotope content of CO2 in nocturnal ecosystem respiration 1: Observations in forests along a precipitation transect in Oregon. Global Biogeochemical Cycles. 17(4).

Bowling, D.R., N.G. McDowell, J.M. Welker, B.J. Bond, B.E. Law, and J.R. Ehleringer (2004), Oxygen isotope content of CO2 in nocturnal ecosystem respiration 2. Short -term dynamics of foliar and soil component fluxes in an old-growth ponderosa pine forest. Global Biogeochemical Cycles. 17(4).


2003

McDowell, N.G., J.R. Brooks, S. Fitzgerald, and B.J. Bond (2003), Carbon isotope discrimination and growth response of old ponderosa pine trees to stand density reductions. Plant, Cell and Environment. 26:631-644.

Brooks, J.R., P.J. Schulte, B.J. Bond, R. Coulombe, J.C. Domec, T.M Hinckley, N. G. McDowell, N. Phillips (2003), Does foliage on the same branch compete for the same water? Experiments on Douglas-fir trees. TREES. 17: 101-108.


2002

Phillips N.G., M.G. Ryan, B.J. Bond, N.G. McDowell, T.M. Hinckley, and J. Cermak (2002), Reliance on stored water increases with tree size in three species in the Pacific Northwest. Tree Physiology. 23: 237-245.

McDowell, N. G., H. Barnard, B. J. Bond, T. Hinckley, R. Hubbard, H. Ishii, K. B., F. C. Meinzer, J. D. Marshall, F. Magnani, N. Phillips, M. G. Ryan, and D. Whitehead (2002), The relationship between tree height and leaf area:sapwood area ratio. Oecologia. 132: 12-20.

McDowell, N. G., N. Phillips, C. K. Lunch, B. J. Bond, and M. G. Ryan (2002), Hydraulic limitation and compensation in large, old Douglas-fir trees. Tree Physiology. 22:763-774.

Phillips, N. P., B. J. Bond, N. G. McDowell, A. J. Schauer, and M. G. Ryan (2002), Water flux and canopy conductance in young, mature, and old Douglas-fir forests. Tree Physiology. 22:205-211.

Bowling, D., N. G. McDowell, B.J. Bond, B.E. Law, and J.R. Ehleringer (2002), 13C content of ecosystem respiration is linked to precipitation and vapor pressure deficit. Oecologia. 131:113-124.

Ishii, H., N.G. McDowell (2002), The role of epicormic branches in crown development of old Douglas-fir trees. Forest Ecology and Management, 169(3):257-270.

Waring, R. W., and N. G. McDowell (2002), Estimating annual carbon balance of forests with widely available data using the 3-PG process model. Tree Physiology, 22:179-188.


2001

McDowell, N.G., N. Balster, J.D. Marshall (2001), Belowground carbon allocation of Rocky Mountain Douglas-fir. Canadian Journal of Forest Research. 31(8):1425-1436.


2000

McDowell, N.G., J. D. Marshall, T. Hooker, and R. Musselman (2000), Estimating CO2 flux from snowpacks at three sites in the Rocky Mountains. Tree Physiology 20:745-753

McDowell, S. C. L., N.G. McDowell, J. D. Marshall, and K. Hultine (2000), Carbon and nitrogen allocation to male and female reproduction in Rocky Mountain Douglas-fir (Pseudotsuga menziesii var. glauca, Pinaceae). American Journal of Botany. 87(4): 539-546.

Cernusak, L. A., N. G. McDowell, and J. D. Marshall (2000), CO2 diffusion in Douglas-fir bark: implications for measuring woody-tissue respiration with removable cuvettes. Journal of Sustainable Forestry. 10: 107-113.


1999

McDowell, N. G., J. D. Marshall, J. Qi, and K. Mattson (1999), Direct inhibition of maintenance respiration in western hemlock roots exposed to ambient soil carbon dioxide concentrations. Tree Physiology. 19:599-605.


Presentations - Invited


2008

Kolb, T.E., and N.G. McDowell. Tree ecophysiology research at Taylor Woods. A Celebration of Fort Valley Experimental Forest's Century of Research, 1908-2008. USDA Forest Service, August 2008.


2007

McDowell, N.G. Advantages and knowledge gained from comparison of ecosystem models to laser based measurements of the stable isotope composition of biosphere-atmosphere CO2 exchange: BASIN (Biosphere Atmosphere Stable Isotope Network) Annual meeting, December 2007, San Francisco CA.

McDowell, N.G. Laser measurements of stable carbon and oxygen isotope ratios of CO2 exchanged at the leaf and soil surfaces. BASIN (Biosphere Atmosphere Stable Isotope Network) Annual meeting, December 2007, San Francisco CA.

White, S. and N.G. McDowell. Climatic and physiological regulation of transpiration across a steep precipitation gradient in northern New Mexico. SAHRA (Sustainability of semi-Arid Hydrology and Riparian Areas, NSF) workshop, Valle Caldera National Preserve, August 2007.

McDowell, N.G., W. Pockman, J. Plaut, E. Yepez, S. White, C. Meyer. Why do some trees die while others survive? Theories underlying tree mortality during climatic stress. Ecological Society of America Annual Meeting, San Jose, CA, August 2007.

McDowell, N.G. and W. Pockman. Mechanisms of survival and mortality during drought in plants. In: Climate induced forest die-back as an emergent phenomenon: patterns, mechanisms and projections. Ecological Society of America Annual Meeting, San Jose, CA, August 2007.

McDowell, N.G. Stable isotopes as indicators of canopy processes. Wind River Canopy Crane Workshop. June 2007.

McDowell, N.G. Climate-ecosystem interactions. In: The IGPP Climate Study Group. May 2007.


2006

Powers, H.H. and N.G. McDowell. 2006. CO2 Lasers. Biosphere-Atmosphere Stable Isotope Network, Annual pre-American Geophysical Union meeting.

McDowell, N.G., and W. Pockman. Mechanisms of mortality and survival during drought. In: Drought Impacts on Regional Ecosystems Network (DIREnet, National Science Foundation) annual meeting, Flagstaff Arizona, July 2006.

McDowell, N.G. Using stable isotopes to understand biosphere-atmosphere carbon and water exchange. In: EES Frontiers in Geoscience Colloquium. April 2006.


2005

McDowell, N.G. Ecosystem and leaf level applications of δ13C and δ18O-CO2 measurements via dioxide tunable diode laser spectroscopy. In: Stable isotope applications to agricultural and plant research. Special session of the Agronomy Society of America's annual meeting, Salt Lake City, Utah, November 2005.

McDowell, N.G. Ecohydrological applications of tunable diode laser absorption spectroscopy measurements of atmospheric CO2. In: Measurement and monitoring methods in ecohydrology. Special session of the American Geophysical Union's Spring Session, New Orleans, Louisiana, May 2005.

McDowell, N.G. Applications of stable isotope measurements to studying the terrestrial carbon and water cycles. Earth and Environmental Sciences Division Review, April 2005.

McDowell, N.G, H. Adams, J. Bailey, T.E. Kolb, D.A. Falk. Using stable isotopes of tree rings to assess physiological response to disturbance. In: Stable isotope analysis of trees: new methods, new uses. Special session of the American Association of Geography, Denver, Colorado, April 2005.

Bond, B.J., M.G. Ryan, N. Phillips, N.G. McDowell, F.C. Meinzer. 2005. Fresh perspectives on hydraulic and hydrostatic limitations to tree height and tree growth 4th International Canopy Conference, Liepzig Germany.


2004

McDowell, N. 2004. Carbon flux analysis in terrestrial ecosystems. US-Norway Summer School on Carbon Capture and Storage in Geologic Formations, St. Johns College, Santa Fe NM.

McDowell, N. and D. Breshears. 2004. A new tool to understand vegetation response to drought: Tunable Diode Laser Absorption Spectroscopy. "Identifying technologies to improve regional water stewardship", a conference hosted by the University of New Mexico Office for Policy, Security and Technology.

Bond, B.J., N. Czarnomski, K. Davis, N. Defrosses, K. George, N. Gehring, J. Licata, C. Lunch, N. McDowell, T. Ocheltree, N. Phillips, T. Pypker, S. Reed, A. Schauer, M. Ryan, M. Williams. 2004. Growth and photosynthesis at Wind River. Invited presentation at the Wind River Canopy Crane Research Facility Annual Meeting, Carson Washington.


2003

McDowell, N. 2003. Stable carbon isotope composition from the leaf to the globe: current understanding and future prospects. University of New Mexico, Biology Department.

McDowell, N. 2003. Using tree-ring analysis to decipher water-use efficiency and growth rates of old Pinus ponderosa trees to disturbance. University of Arizona, Laboratory for Tree-Ring Research.

McDowell, N. 2003. Carbon isotope discrimination and growth response of old trees to stand density reductions. Northern Arizona University, Forest Science Department.


2002

McDowell, N. 2002. Hydraulic constraints on tree growth. Oregon State University, Department of Forest Science.

Bowling D, Lai C-T, McDowell N. 2002. Short-term environmental effects on δ13C of ecosystem respiration, Stable Isotopes and Biosphere-Atmosphere Interactions International Workshop, Banff, Alberta.


2001

Bond, B.J., M.G. Ryan, N. Phillips, N.G. McDowell. 2001. The Hydraulic Limitation Hypothesis: past, present and future. Terrestrial Carbon Sequestration Conference, Helsinki, Finland.


2000

Bond, B.J., M.G. Ryan, N. Phillips, N.G. McDowell and R.M. Hubbard. 2000. Hydraulic constraints on productivity of old growth trees. Symposium #9: The Water Limitation: Issues in Plant, Community and Ecosystem Water Use. Ecological Society of America 85th Annual Meeting, Snowbird, Utah.


Presentations - Noninvited


2007

White, S. Andra, William T. Pockman, Nate McDowell, Mike Ryan, Enrico Yepez. Soil respiration responses to precipitation pulse-dynamics in a piñon-juniper ecosystem. Annual Meeting of the Ecological Society of America. San Jose, CA. Aug, 2007

Plaut, Jennifer, Enrico Yepez, William T. Pockman, Nathan G. McDowell. Precipitation pulse responses in piñon-juniper woodland in central New Mexico. Annual Meeting of the Ecological Society of America. San Jose, CA. Aug, 2007

Yepez, Enrico A., Jim Elliot, S. Andra White, Jennifer Plaut, Nathan McDowell, William T. Pockman. Causes and consequences of tree mortality in piñon-juniper woodlands. Introducing an ecosystem scale rainfall manipulation. Annual Meeting of the Ecological Society of America. San Jose, CA. Aug, 2007

Yepez, Enrico A., Jim Elliot, S. Andra White, Jennifer Plaut, Nathan McDowell, William T. Pockman. Hydraulic mechanisms related to tree mortality and survival during drought in Piñon (Pinus edulis) and Juniper (Juniperus monosperma) woodlands. AGU Spring meeting. Aculpulco Mexico.

White, S. Andra, William T Pockman, NG McDowell, M. Ryan and E Yepez. 2007. Soil respiration in a piñon juniper ecosystem. UNM Biology Research Day, April 2007.

Glaser, Julie C., Nicole A. Davision, Jennifer E. Johnson, Enrico A. Yepez and William T. Pockman. Water sources and carbon isotope discrimination in pinon-juniper woodlands at the Sevilleta LTER. UNM Biology Research Day, April 2007.


2006

Hanson, D., M.M. Barbour, N.G. McDowell. 2006. Rapid shifts in 13CO2 content of leaf respiration: Potential 13CO2 signature of light-enhanced dark respiration. American Society of Plant Biology Annual Meeting, Washington DC.

Kolb, T.E., D.F. Koepke, N.G. McDowell. 2006. A tree-centered mechanistic basis for drought-induced bark beetle outbreaks in Arizona. North American Forest Insect Work Conference. Asheville, North Carolina.

Powers, H. H. and N.G. McDowell. 2006. New design and methodology for measuring stable isotopes of soil respired carbon dioxide. Los Alamos National Laboratory.


2005

Powers, H.H., C.P. Bickford, C.W. Meyer, D.T. Hanson, S. Kern, and N.G. McDowell. 2005. Tunable Diode Laser Spectroscopy: Testing and development for real-time isotopic measurements from leaf to ecosystem scale carbon dioxide exchange. American Geophysical Union Fall Meeting, San Francisco, California

Barbour, M.M, D.T. Hanson, C.P. Bickford, N.G. McDowell. 2005. Temporal variability in carbon isotope composition of leaf-respired carbon dioxide. American Geophysical Union Fall Meeting, San Francisco, California.

McDowell, N.G., C.P. Bickford, D.T. Hanson, S.E. Kern, C. Meyer, W. Pockman, H. Powers. 2005. Tunable Diode Laser Measurements of Leaf-scale Carbon Isotope Discrimination and Ecosystem Respired Carbon and Oxygen Isotope Ratios in a Semi-arid Woodland. American Geophysical Union Fall Meeting, San Francisco, California.

Levanič, T. and N.G. McDowell. 2005. Stable isotopes in oak (Quercus robur L.) rings as an indicator of oak mortality. EURODENDRO 2005, Viterbo, Italy.

Hanson, D.T. and N.G. McDowell. 2005. Assessing carbon concentrating mechanism function with a tunable diode laser spectrometer: real-time analysis of 13CO2 discrimination. American Society of Plant Biologists Annual Meeting, Seattle, Washington.


2004

McDowell, N.G., J. Licata, B.J. Bond, and M. Falk. 2004. Revisiting hydraulic limitation at Wind River, Washington. Ecological Society of America 89th Annual Meeting, Portland, Oregon.


2003

McDowell, N.G., D.R. Bowling, A. Schauer, B.J. Bond, J. Irvine, B.E. Law, J.R. Ehleringer. 2003. Seasonal variation in δ13CR in two coniferous forests. American Geophysical Union Fall Meeting, San Francisco, California.


2001

McDowell, N.G., D. Bowling, B.J. Bond, and J.R. Ehleringer. 2001. Oxygen-18 content of ecosystem respiration across a climatic gradient in Oregon. American Geophysical Union Fall Meeting, San Francisco, California.

Bowling D., N.G. McDowell, B.E. Law, B.J. Bond, J.R. Ehleringer. 2001. Isotopic (13C) response of ponderosa pine ecosystem respiration to atmospheric stress events. American Geophysical Union Fall Meeting, San Francisco, California.

McDowell, N.G., D. Bowling, B.J. Bond, and J.R. Ehleringer. Seasonal variation of δ18O of ecosystem respiration across a precipitation gradient in Oregon USA. 2001. International Union of Forest Research Organizations, Canopy Process Sub Division, Portland, Oregon.


2000

Ishii, H., E.D. Ford, N.G. McDowell. 2000. The role of epicormic branches in crown development of old-growth Douglas-fir trees. Japanese Ecological Society Annual Meeting, Tokyo, Japan.

Bowling, D., N.G. McDowell, B.J. Bond, P. Anthoni, J. Irvine, B. Law, and J.R. Ehleringer. 2000. Seasonal and interannual variation in the carbon isotopic composition of ecosystem respiration along an Oregon precipitation gradient. American Geophysical Union Fall Meeting, San Francisco, California.

McDowell, N.G., N. Phillips, A. Schauer, B.J. Bond, and M.G. Ryan. 2000. Hydraulic limitation and compensation in large, old Douglas-fir. Ecological Society of America 85th Annual Meeting, Snowbird Utah.

Phillips N, B.J. Bond, M.G. Ryan, N.G. McDowell, A. Schauer. 2000. Hydraulic resistance and capacitance as a function of tree size. Ecological Society of America 85th Annual Meeting, Snowbird Utah.

Phillips N, B.J. Bond, N.G. McDowell, A. Schauer, M.G. Ryan. 2000. Can storage in tall trees overcome hydraulic limitations to forest transpiration? American Geophysical Union, Spring Meeting, Washington, DC.


1999

McDowell, N.G., B.J. Bond, R. Hubbard, R. Ishii, N. Phillips, M.G. Ryan, D. Whitehead. 1999. The relationship between tree height and leaf area:sapwood area. Ecological Society of America 84th Annual Meeting, Spokane Washington.

Phillips, N, B.J. Bond, M.G. Ryan, N.G. McDowell, K.T. Paw U, J. Chen 1999. Scaling water use of 20, 40 and 500 year old Douglas-fir trees to the forest level and comparison with eddy covariance estimates. American Geophysical Union, Fall Meeting, San Francisco, CA.

Phillips N, B.J. Bond, M.G.Ryan, N.G. McDowell, E. Watrud 1999. Do hydraulic constraints in tall trees affect crown gas exchange? Ecological Society of America, Annual Meeting, Spokane, WA.


Posters


2007

Engel, S., H.M. Lease, N.G. McDowell, and B.O. Wolf. 2007. Breath carbon isotope ratios from a fall grasshopper community as measured in real time with tunable diode laser absorption spectroscopy. The Society for Integrative and Comparative Biology Annual Conference, Phoenix USA.


2006

Powers, H., J. Hunt, N.G. McDowell. 2006. Measuring soil CO2 fluxes and stable isotopes with a chamber system and tunable diode laser. American Geophysical Union's Fall Meeting, San Francisco USA.


2005

Powers, H., C. Bickford, D. Hanson, S. Kern, C. Meyer, N. McDowell. 2005. Tunable Diode Laser Absorption Spectroscopy: testing and development for real-time stable isotope measurements of leaf to ecosystem-scale carbon dioxide exchange. American Geophysical Union's Fall Meeting, San Francisco USA.

White, S., K. Brown, H. Powers, C. Meyer, N. McDowell. 2005. Canopy transpiration across a steep climatic gradient in the Jemez Mts. of northern New Mexico. American Geophysical Union's Fall Meeting, San Francisco USA.

Meyer C.W., D.D. Breshears, K.L. Goddard, K.E. Dayem, S.N. Martens, N.G. McDowell. Drought recovery via foliar absorption of intercepted rainfall bypasses soil water uptake. Ecological Society of America 89th Annual Meeting, Portland, Oregon.


2002

McDowell, N.G., D. Bowling, J. Welker, J. Irvine, B. E. Law, B.J. Bond, and J.R. Ehleringer. Relationships between precipitation, season, and the δ18O of ecosystem respiration across a steep climatic gradient. Biosphere-Atmosphere Stable Isotope Network, May meeting, Banff Canada, 2002.

McDowell, N.G., D. Bowling. Estimating the δ18O and δ13C of ecosystem respiration: calculation via intercepts vs. slopes. Biosphere-Atmosphere Stable Isotope Network, May meeting, Banff Canada, 2002.


2001

Bowling, D., N. G. McDowell, B.J. Bond, B.E. Law, and J.R. Ehleringer. 2001. 13C content of ecosystem respiration is linked to precipitation and vapor pressure deficit. "History of Atmospheric CO2 and the Impact on Plants, Animals, and Ecosystems" Snowbird, Utah.

Bowling, D., N. G. McDowell, B.J. Bond, B.E. Law, and J.R. Ehleringer. 2001. Ecosystem respiration 13C across a steep climatic gradient in Oregon, USA. International Union of Forest Research Organizations, Canopy Process Sub Division, Portland, Oregon.


Pre-2000

Watrude, E., B.J. Bond, N. Phillips, N. McDowell, and M.G. Ryan. Differences in soil water drawdown during the summer of 1998 in three different age classes of Douglas-fir in the Wind River Basin, Washington. 1999 Ecological Society of America Annual Meeting.

McDowell, N. G., Nick J. Balster, John D. Marshall, and Brian Austin. "Winter carbon dioxide uptake and release from an interior Pacific Northwest forest." 1997 Ecological Society of America Annual Meeting. First place, "Best Student Poster Award". Physiological Ecology Section.


 


 

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