Publications

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Publications Found: 46

Net Ecosystem Production In A Temperate Pine Plantation In Southeastern Canada
Arain, M. A., Restrepo-Coupe, N.

Eddy covariance measurements of carbon dioxide (CO2) and water vapour fluxes were made from June 2002 to May 2003 over a 65-year-old temperate conifer plantation forest in southern Ontario, Canada. This site is part of a newly initiated long-term tower flux measurement …


Journal: Agricultural And Forest Meteorology, Volume 128 (3-4): 223-241 (2005). DOI: 10.1016/j.agrformet.2004.10.003 Sites: CA-Ca1, CA-TP1, CA-TP2, CA-TP3, CA-TP4, US-Dk3, US-GLE, US-Ho1, US-Me4, US-Me5, US-NR1

Monitoring Forest Carbon Sequestration With Remote Sensing And Carbon Cycle Modeling
Turner, D. P., Guzy, M., Lefsky, M. A., Ritts, W. D., Van Tuyl, S., Law, B. E.

Sources and sinks of carbon associated with forests depend strongly on the management regime and spatial patterns in potential productivity. Satellite remote sensing can provide spatially explicit information on land cover, stand-age class, and harvesting. …


Journal: Environmental Management, Volume 33 (4): 457-466 (2004). DOI: 10.1007/s00267-003-9103-8 Sites: US-Me4, US-Me5

Supply-Side Controls On Soil Respiration Among Oregon Forests
Campbell, J. L., Sun, O. J., Law, B. E.

To test the hypothesis that variation in soil respiration is related to plant production across a diverse forested landscape, we compared annual soil respiration rates with net primary production and the subsequent allocation of carbon to various ecosystem pools, including leaves, fine roots, forests floor, and mineral soil for 36 …


Journal: Global Change Biology, Volume 10 (11): 1857-1869 (2004). DOI: 10.1111/j.1365-2486.2004.00850.x Sites: US-Me2, US-Me4, US-Me5

Associations Between Carbon Isotope Ratios Of Ecosystem Respiration, Water Availability And Canopy Conductance
McDowell, N. G., Bowling, D. R., Schauer, A., Irvine, J., Bond, B. J., Law, B. E., Ehleringer, J. R.

We tested the hypothesis that the stable carbon isotope signature of ecosystem respiration (δ13CR) was regulated by canopy conductance (Gc) using weekly Keeling plots (n=51) from a semiarid old-growth ponderosa pine (Pinus ponderosa) forest in Oregon, USA. For …


Journal: Global Change Biology, Volume 10 (10): 1767-1784 (2004). DOI: 10.1111/j.1365-2486.2004.00837.x Sites: US-Blo, US-Me4

Forest Attributes From Radar Interferometric Structure And Its Fusion With Optical Remote Sensing
Treuhaft, R. N., Law, B. E., Asner, G. P.

The possibility of global, three-dimensional remote sensing of forest structure with interferometric synthetic aperture radar (InSAR) bears on important forest ecological processes, particularly the carbon cycle. InSAR supplements two-dimensional remote sensing with information in the vertical dimension. Its strengths in potential …


Journal: Bioscience, Volume 54 (6): 561-571 (2004). DOI: 10.1641/0006-3568(2004)054[0561:fafris]2.0.co;2 Sites: US-Me2, US-Me4, US-Me5

Climatic Versus Biotic Constraints On Carbon And Water Fluxes In Seasonally Drought-Affected Ponderosa Pine Ecosystems
Schwarz, P. A., Law, B. E., Williams, M., Irvine, J., Kurpius, M., Moore, D.

We investigated the relative importance of climatic versus biotic controls on gross primary production (GPP) and water vapor fluxes in seasonally drought-affected ponderosa pine forests. The study was conducted in young (YS), mature (MS), and old stands (OS) over 4 years at the AmeriFlux Metolius sites. Model simulations showed that …


Journal: Global Biogeochemical Cycles, Volume 18 (GB4007): n/a-n/a (2004). DOI: 10.1029/2004GB002234 Sites: US-Me2, US-Me4, US-Me5

Disturbance And Net Ecosystem Production Across Three Climatically Distinct Forest Landscapes
Campbell, J. L., Sun, O. J., Law, B. E.

Biometric techniques were used to measure net ecosystem production (NEP) across three climatically distinct forest chronosequences in Oregon. NEP was highly negative immediately following stand-replacing disturbance in all forests and recovered to positive values by 10, 20, and 30 years of age for the mild and mesic Coast Range, …


Journal: Global Biogeochemical Cycles, Volume 18 (4): n/a-n/a (2004). DOI: 10.1029/2004gb002236 Sites: US-Me2, US-Me4

Limitations To Carbon Mineralization In Litter And Mineral Soil Of Young And Old Ponderosa Pine Forests
Kelliher, F., Ross, D., Law, B., Baldocchi, D., Rodda, N.

Summer drought is a feature of the semi-arid region of central Oregon, USA, where vegetation naturally develops into ponderosa pine (Pinus ponderosa var. Laws) forest. Forest management consists of clearcut harvest and natural regeneration. Soil microbial activity is interconnected with forest processes because substrate …


Journal: Forest Ecology And Management, Volume 191 (1-3): 201-213 (2004). DOI: 10.1016/j.foreco.2003.12.005 Sites: US-Me4, US-Me5

Age-Related Changes In Ecosystem Structure And Function And Effects On Water And Carbon Exchange In Ponderosa Pine
Irvine, J., Law, B. E., Kurpius, M. R., Anthoni, P. M., Moore, D., Schwarz, P. A.

As forests age, their structure and productivity change, yet in some cases, annual rates of water loss remain unchanged. To identify mechanisms that might explain such observations, and to determine if widely different age classes of forests differ functionally, we examined young (Y, 25 years), mature (M, 90 years) …


Journal: Tree Physiology, Volume 24 (7): 753-763 (2004). DOI: 10.1093/treephys/24.7.753 Sites: US-Me4, US-Me5

Disturbance And Climate Effects On Carbon Stocks And Fluxes Across Western Oregon USA
Law, B. E., Turner, D., Campbell, J., Sun, O. J., Van Tuyl, S., Ritts, W. D., Cohen, W. B.

We used a spatially nested hierarchy of field and remote-sensing observations and a process model, Biome-BGC, to produce a carbon budget for the forested region of Oregon, and to determine the relative influence of differences in climate and disturbance among the ecoregions on carbon stocks and fluxes. The simulations suggest that …


Journal: Global Change Biology, Volume 10 (9): 1429-1444 (2004). DOI: 10.1111/j.1365-2486.2004.00822.x Sites: US-Me2, US-Me4, US-Me5