Publications

Publications Found: 1437

Variability In Net Primary Production And Carbon Storage In Biomass Across Oregon Forests—An Assessment Integrating Data From Forest Inventories, Intensive Sites, And Remote Sensing
Van Tuyl, S., Law, B., Turner, D., Gitelman, A.

We used a combination of data from USDA Forest Service inventories, intensive chronosequences, extensive sites, and satellite remote sensing, to estimate biomass and net primary production (NPP) for the forested region of western Oregon. The study area was divided into four …


Journal: Forest Ecology And Management, Volume 209 (3): 273-291 (2005). DOI: 10.1016/j.foreco.2005.02.002 Sites: US-Me2, US-Me4, US-Me5

Spatial Analysis Of Growing Season Length Control Over Net Ecosystem Exchange
Churkina, G., Schimel, D., Braswell, B. H., Xiao, X.

Using data from 28 flux measurement sites, we performed an analysis of the relationship between annual net ecosystem exchange (NEE) and the length of the carbon uptake period …


Journal: Global Change Biology, Volume 11 (10): 1777-1787 (2005). DOI: 10.1111/j.1365-2486.2005.001012.x Sites: US-NR1

Annual Soil Respiration In Broadleaf Forests Of Northern Wisconsin: Influence Of Moisture And Site Biological, Chemical, And Physical Characteristics
Martin, J. G., Bolstad, P. V.

Soil temperature and moisture influence soil respiration at a range of temporal and spatial scales. Although soil temperature and moisture may be seasonally correlated, intra and inter-annual variations in soil moisture do occur. There are few direct observations …


Journal: Biogeochemistry, Volume 73 (1): 149-182 (2005). DOI: 10.1007/s10533-004-5166-8 Sites: US-WCr

Comparing Net Ecosystem Exchange Of Carbon Dioxide Between An Old-Growth And Mature Forest In The Upper Midwest, Usa
Desai, A. R., Bolstad, P. V., Cook, B. D., Davis, K. J., Carey, E. V.

Old-growth forests are often assumed to exhibit no net carbon assimilation over time periods of several years. This generalization has not been typically supported by the few whole-ecosystem, stand-scale eddy-covariance measurements of carbon dioxide exchange in old-growth forests. An eddy-flux tower installed in a >300-year-old …


Journal: Agricultural And Forest Meteorology, Volume 128 (1-2): 33-55 (2005). DOI: 10.1016/j.agrformet.2004.09.005 Sites: US-Syv, US-WCr

Relationship Between Soil CO2 Concentrations And Forest-Floor CO2 Effluxes
Jassal, R., Black, A., Novak, M., Morgenstern, K., Nesic, Z., Gaumont-Guay, D.

To better understand the biotic and abiotic factors that control soil CO2 efflux, we compared seasonal and diurnal variations in simultaneously measured forest-floor CO2effluxes and soil CO2 concentration profiles in a 54-year-old Douglas fir forest on the east coast of Vancouver Island. …


Journal: Agricultural And Forest Meteorology, Volume 130 (3-4): 176-192 (2005). DOI: 10.1016/j.agrformet.2005.03.005 Sites: CA-Ca1

Response Of The Carbon Isotopic Content Of Ecosystem, Leaf, And Soil Respiration To Meteorological And Physiological Driving Factors In A Pinus Ponderosa Ecosystem
McDowell, N. G., Bowling, D. R., Bond, B. J., Irvine, J., Law, B. E., Anthoni, P., Ehleringer, J. R.

Understanding the controls over ecosystem-respired δ13C (δ13CR) is important for applications of isotope-based models of the global carbon budget as well as for understanding ecosystem-level variation in isotopic discrimination (Δ). Discrimination may be strongly dependent on synoptic-scale variation …


Journal: Global Biogeochemical Cycles, Volume 18 (1): n/a-n/a (2004). DOI: 10.1029/2003gb002049 Sites: US-Me2, US-Me4

Canopy Damage And Recovery After Selective Logging In Amazonia: Field And Satellite Studies
Asner, G. P., Keller, M., Pereira, Jr, R., Zweede, J. C., Silva, J. N.

We combined a detailed field study of canopy gap fraction with spectral mixture analyses of Landsat 7 ETM+ satellite imagery to assess landscape and regional dynamics of canopy damage following selective logging in an eastern Amazon forest. Our field studies encompassed measurements of ground damage and canopy gap fractions along …


Journal: Ecological Applications, Volume 14 (sp4): 280-298 (2004). DOI: 10.1890/01-6019 Sites: BR-Sa3

A Model For Scalar Advection Inside Canopies And Application To Footprint Investigation
Lee, X.

In this paper, a model is presented for scalar advection inside canopies. A key result is an advection/diffusion equation that captures the persistence effect of the diffusion plume from elevated sources through a near-field modifier. The model is applicable to various source configurations including line source, plane and …


Journal: Agricultural And Forest Meteorology, Volume 127 (3-4): 131-141 (2004). DOI: 10.1016/j.agrformet.2004.07.009 Sites: US-GMF

Net Primary Production And Net Ecosystem Production Of A Boreal Black Spruce Wildfire Chronosequence
Bond-Lamberty, B., Wang, C., Gower, S. T.

Net primary production (NPP) was measured in seven black spruce (Picea mariana (Mill.) BSP)-dominated sites comprising a boreal forest chronosequence near Thompson, Man., Canada. The sites burned between 1998 and 1850, and each contained separate well- and poorly drained stands. All components of NPP were measured, most …


Journal: Global Change Biology, Volume 10 (4): 473-487 (2004). DOI: 10.1111/j.1529-8817.2003.0742.x Sites: CA-Man, CA-NS2, CA-NS3, CA-NS5, CA-NS6, CA-NS7

Biometric And Micrometeorological Measurements Of Tropical Forest Carbon Balance
Miller, S. D., Goulden, M. L., Menton, M. C., da Rocha, H. R., de Freitas, H. C., Figueira, A. M., Dias de Sousa, C. A.

We used two independent approaches, biometry and micrometeorology, to determine the net ecosystem production (NEP) of an old growth forest in Pará, Brazil. Biometric inventories indicated that the forest was either a source or, at most, a modest sink of carbon from 1984 to 2000 (+0.8 ± 2 Mg C·ha−1·yr−1; …


Journal: Ecological Applications, Volume 14 (sp4): 114-126 (2004). DOI: 10.1890/02-6005 Sites: BR-Sa3