Publications

Publications Found: 1373
Soil Evaporation Response To Lehmann Lovegrass (Eragrostis Lehmanniana) Invasion In A Semiarid Watershed
Moran, M. S., Scott, R. L., Hamerlynck, E. P., Green, K. N., Emmerich, W. E., Holifield Collins, C. D.

Across the western United States, warm-season grasslands are being invaded by the exotic perennial grass, Eragrostis lehmanniana (Lehmann lovegrass). The objective of this study was to quantify the change in surface water balance, particularly the evaporation from bare soil, associated with E. lehmanniana invasion. …


Journal: Agricultural And Forest Meteorology, Volume 149 (12): 2133-2142 (2009), ISBN . DOI: 10.1016/j.agrformet.2009.03.018 Sites: US-Wkg

Seasonal Hydrology Explains Interannual And Seasonal Variation In Carbon And Water Exchange In A Semiarid Mature Ponderosa Pine Forest In Central Oregon
Thomas, C. K., Law, B. E., Irvine, J., Martin, J. G., Pettijohn, J. C., Davis, K. J.

We analyzed 7 years (2002–2008) of micrometeorological and concurrent biological observations of carbon and water fluxes at a mature ponderosa pine forest in central Oregon in a semiarid climate. We sought to evaluate the extent that gross primary productivity, net ecosystem exchange, ecosystem respiration, net primary productivity, …


Journal: Journal Of Geophysical Research: Biogeosciences, Volume 114 (G4): n/a-n/a (2009), ISBN . DOI: 10.1029/2009jg001010 Sites: US-Me2

Comparison Of Carbon Dynamics And Water Use Efficiency Following Fire And Harvesting In Canadian Boreal Forests
Mkhabela, M., Amiro, B., Barr, A., Black, T., Hawthorne, I., Kidston, J., McCaughey, J., Orchansky, A., Nesic, Z., Sass, A., Shashkov, A., Zha, T.

Fire and harvesting are major forest renewal processes in the Canadian boreal forest. The eddy covariance method was used to compare ecosystem fluxes of carbon dioxide between harvested and burned boreal forest sites in Saskatchewan, Canada. The harvest chronosequence had …


Journal: Agricultural And Forest Meteorology, Volume 149 (5): 783-794 (2009), ISBN . DOI: 10.1016/j.agrformet.2008.10.025 Sites: CA-SF1, CA-SF2, CA-SF3

Nocturnal Evapotranspiration In Eddy-Covariance Records From Three Co-Located Ecosystems In The Southeastern U.S.: Implications For Annual Fluxes
Novick, K., Oren, R., Stoy, P., Siqueira, M., Katul, G.

Nocturnal evapotranspiration (ETN) is often assumed to be negligible in terrestrial ecosystems, reflecting the common assumption that plant stomata close at night to prevent water loss from transpiration. However, recent evidence across a wide …


Journal: Agricultural And Forest Meteorology, Volume 149 (9): 1491-1504 (2009), ISBN . DOI: 10.1016/j.agrformet.2009.04.005 Sites: US-Dk2, US-Dk3

Impact Of Reduced Tillage And Cover Cropping On The Greenhouse Gas Budget Of A Maize/Soybean Rotation Ecosystem
Bavin, T., Griffis, T., Baker, J., Venterea, R.

Agricultural ecosystems have been viewed with the potential to sequester atmospheric carbon dioxide (CO2) by increasing soil organic carbon (SOC) through reduced tillage and cover cropping practices. There remains considerable uncertainty, however, regarding the …


Journal: Agriculture, Ecosystems & Environment, Volume 134 (3-4): 234-242 (2009), ISBN . DOI: 10.1016/j.agee.2009.07.005 Sites: US-Ro1

Effects Of Seasonal Drought On Net Carbon Dioxide Exchange From A Woody-Plant-Encroached Semiarid Grassland
Scott, R.L., Jenerette, G.D., Potts, D.L., Huxman, T.E.

Annual precipitation in the central and southern warm-desert region of North America is distributed climatologically between summer and winter periods with two prominent dry periods between them. We used energy and carbon dioxide (CO2) fluxes from eddy covariance along with standard meteorological and soil moisture measurements …


Journal: Journal Of Geophysical Research: Biogeosciences, Volume 114 (G4): n/a-n/a (2009), ISBN . DOI: 10.1029/2008jg000900 Sites: US-SRM

Response Of CO2 Exchange In A Tussock Tundra Ecosystem To Permafrost Thaw And Thermokarst Development
Vogel, J., Schuur, E. A. G., Trucco, C., Lee, H.

Climate change in high latitudes can lead to permafrost thaw, which in ice-rich soils can result in ground subsidence, or thermokarst. In interior Alaska, we examined seasonal and annual ecosystem CO2exchange using static and automatic chamber measurements in three areas of a moist acidic tundra ecosystem undergoing varying …


Journal: Journal Of Geophysical Research: Biogeosciences, Volume 114 (G4): n/a-n/a (2009), ISBN . DOI: 10.1029/2008jg000901 Sites: US-EML

Decoupling The Influence Of Leaf And Root Hydraulic Conductances On Stomatal Conductance And Its Sensitivity To Vapour Pressure Deficit As Soil Dries In A Drained Loblolly Pine Plantation
Domec, J., Noormets, A., King, J. S., Sun, G., Mcnulty, S. G., Gavazzi, M. J., Boggs, J. L., Treasure, E. A.

The study examined the relationships between whole tree hydraulic conductance (Ktree) and the conductance in roots (Kroot) and leaves …


Journal: Plant, Cell & Environment, Volume 32 (8): 980-991 (2009), ISBN . DOI: 10.1111/j.1365-3040.2009.01981.x Sites: US-NC1

Random And Systematic CO2 Flux Sampling Errors For Tower Measurements Over Forests In The Convective Boundary Layer
Vickers, D., Thomas, C., Law, B. E.

The perturbation timescale-dependences of the CO2 flux and the random flux sampling error are evaluated from eddy-covariance tower observations in the mid-day convective boundary layer over mid-latitude conifer forests. The perturbation timescale is the timescale used in the standard Reynolds decomposition to …


Journal: Agricultural And Forest Meteorology, Volume 149 (1): 73-83 (2009), ISBN . DOI: 10.1016/j.agrformet.2008.07.005 Sites: US-Me2, US-Me3

Partitioning Evapotranspiration In Semiarid Grassland And Shrubland Ecosystems Using Time Series Of Soil Surface Temperature
Moran, M., Scott, R., Keefer, T., Emmerich, W., Hernandez, M., Nearing, G., Paige, G., Cosh, M., O’Neill, P.

Information about the ratio of transpiration (T) to total evapotranspiration (T/ET) is related to critical global change concerns, including shrub encroachment and non-native species invasion. In this study, a new approach was developed to partition measurements …


Journal: Agricultural And Forest Meteorology, Volume 149 (1): 59-72 (2009), ISBN . DOI: 10.1016/j.agrformet.2008.07.004 Sites: US-Whs, US-Wkg