Publications

Publications Found: 1373
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
Bowling, D. R., McDowell, N. G., Welker, J. M., Bond, B. J., Law, B. E., Ehleringer, J. R.

The oxygen isotope contents (δ18O) of soil, xylem, and leaf water and ecosystem respiration were studied in a ponderosa pine forest during summer 2001. Our goal was to assess whether δ18O of CO2could be used to quantify the relative contributions of soil and foliar respiration to total nocturnal …


Journal: Global Biogeochemical Cycles, Volume 17 (4): n/a-n/a (2003), ISBN . DOI: 10.1029/2003gb002082 Sites: US-Me4

Meeting Cereal Demand While Protecting Natural Resources And Improving Environmental Quality
Cassman, K. G., Dobermann, A., Walters, D. T., Yang, H.

Agriculture is a resource-intensive enterprise. The manner in which food production systems utilize resources has a large influence on environmental quality. To evaluate prospects for conserving natural resources while meeting increased demand for cereals, we interpret recent trends and future trajectories in crop yields, land and …


Journal: Annual Review Of Environment And Resources, Volume 28 (1): 315-358 (2003), ISBN . DOI: 10.1146/annurev.energy.28.040202.122858 Sites: US-Ne2, US-Ne3

Elevated CO2 Lowers Relative And Absolute Herbivore Density Across All Species Of A Scrub-Oak Forest
Stiling, P., Moon, D., Hunter, M., Colson, J., Rossi, A., Hymus, G., Drake, B.

The unabated increase in global atmospheric CO2 is expected to induce physiological changes in plants, including reduced foliar nitrogen, which are likely to affect herbivore densities. This study employs a field-based CO2 enrichment experiment at Kennedy Space Center, Florida, to examine plant-herbivore (insect) …


Journal: Oecologia, Volume 134 (1): 82-87 (2003), ISBN . DOI: 10.1007/s00442-002-1075-5 Sites: US-KS2

Carbon Dioxide Fluxes In A Semiarid Environment With High Carbonate Soils
Emmerich, W. E.

Carbon dioxide is increasing in the atmosphere due to human activities. Over long time periods semiarid soils have sequestered inorganic carbon to accumulate the third largest global carbon pool. The hypothesis for this study was that these soils are maintaining this carbon pool under present climatic conditions and are a sink for …


Journal: Agricultural And Forest Meteorology, Volume 116 (1-2): 91-102 (2003), ISBN . DOI: 10.1016/s0168-1923(02)00231-9 Sites: US-Wkg

Temperature As A Control Over Ecosystem CO2 Fluxes In A High-Elevation, Subalpine Forest
Huxman, T. E., Turnipseed, A. A., Sparks, J. P., Harley, P. C., Monson, R. K.

We evaluated the hypothesis that CO2 uptake by a subalpine, coniferous forest is limited by cool temperature during the growing season. Using the eddy covariance approach we conducted observations of net ecosystem CO2 exchange (NEE) across two growing seasons. When pooled for the entire growing season during …


Journal: Oecologia, Volume 134 (4): 537-546 (2003), ISBN . DOI: 10.1007/s00442-002-1131-1 Sites: US-NR1

Molecular And Carbon Isotopic Composition Of Leaf Wax In Vegetation And Aerosols In A Northern Prairie Ecosystem
Conte, M. H., Weber, J. C., Carlson, P. J., Flanagan, L. B.

We measured the molecular and carbon isotopic composition of major leaf wax compound classes in northern mixed mesic prairie species (Agropyron smithii, Stipa viridula, Bouteloua gracilis,


Journal: Oecologia, Volume 135 (1): 67-77 (2003), ISBN . DOI: 10.1007/s00442-002-1157-4 Sites: CA-Let

Annual And Seasonal Variability Of Sensible And Latent Heat Fluxes Above A Coastal Douglas-Fir Forest, British Columbia, Canada
Humphreys, E., Black, T., Ethier, G., Drewitt, G., Spittlehouse, D., Jork, E., Nesic, Z., Livingston, N.

Two years of continuous eddy covariance measurements were used to characterize the seasonal and annual variability of the latent and sensible heat fluxes above a 50-year-old, 33 m tall coastal Douglas-fir forest on the east coast of Vancouver Island, Canada. The total annual evaporation was found to be very conservative …


Journal: Agricultural And Forest Meteorology, Volume 115 (1-2): 109-125 (2003), ISBN . DOI: 10.1016/s0168-1923(02)00171-5 Sites: CA-Ca1

Effects Of Land Use And Fine-Scale Environmental Heterogeneity On Net Ecosystem Production Over A Temperate Coniferous Forest Landscape
Turner, D. P., Guzy, M., Lefsky, M. A., Van Tuyl, S., Sun, O., Daly, C., Law, B. E.


Journal: Tellus Series B-Chemical and Physical Meteorology, Volume 55 (2): 657-668 (2003), ISBN . DOI: 10.1034/j.1600-0889.2003.01416.x Sites: US-Me4

Oxygen Isotope Content Of CO2 In Nocturnal Ecosystem Respiration: 1. Observations In Forests Along A Precipitation Transect In Oregon, USA
Bowling, D. R., McDowell, N. G., Welker, J. M., Bond, B. J., Law, B. E., Ehleringer, J. R.

The oxygen isotope content of nocturnal ecosystem respiration (δ18OR) was examined in forests along a precipitation gradient in Oregon, USA, to determine whether site-to-site variation in δ18OR was more strongly related to variation in δ18O of precipitation or to evaporative …


Journal: Global Biogeochemical Cycles, Volume 17 (4): n/a-n/a (2003), ISBN . DOI: 10.1029/2003gb002081 Sites: US-Me4

Transfer Conductance In Second Growth Douglas-Fir (Pseudotsuga Menziesii (Mirb.)Franco) Canopies
Warren, C. R., Ethier, G. J., Livingston, N. J., Grant, N. J., Turpin, D. H., Harrison, D. L., Black, T. A.

The internal conductance from intercellular spaces to the sites of carboxylation (gi) has only been measured in a few tree species and not in conifers, …


Journal: Plant, Cell And Environment, Volume 26 (8): 1215-1227 (2003), ISBN . DOI: 10.1046/j.1365-3040.2003.01044.x Sites: CA-Ca1