Publications

Publications Found: 1437

Is soil respiration a major contributor to the carbon budget within a Pacific Northwest old-growth forest?
Falk, M., Paw U, K.T., Wharton, S., Schroeder, M.

Carbon dioxide (CO2) exchange was measured above the forest floor of a temperate Douglas-fir (Pseudotsuga menziesii (Mirbel)
Franco) and Western Hemlock (Tsuga heterophylla (Raf.) Sarg.) old-growth forest in southern Washington State. Continuous flux
measurements were conducted from July 1998 to December 2003 using the eddy-covariance …


Journal: Agricultural and Forest Meteorology, Volume 135: 269-283 (2005). DOI: Sites: US-Wrc

Forest Thinning And Soil Respiration In A Ponderosa Pine Plantation In The Sierra Nevada
Tang, J., Qi, Y., Xu, M., Misson, L., Goldstein, A. H.

Soil respiration is controlled by soil temperature, soil water, fine roots, microbial activity, and soil physical and chemical properties. Forest thinning changes soil temperature, soil water content, and root density and activity, and thus changes soil respiration. We measured soil respiration monthly and soil temperature and volumetric …


Journal: Tree Physiology, Volume 25 (1): 57-66 (2005). DOI: 10.1093/treephys/25.1.57 Sites: US-Blo

Forest Soil Respiration Across Three Climatically Distinct Chronosequences In Oregon
Campbell, J., Law, B.

To assess the relative influence of edaphoclimatic gradients and stand replacing disturbance on the soil respiration of Oregon forests, we measured annual soil respiration at 36 independent forest plots arranged as three replicates of four age classes in …


Journal: Biogeochemistry, Volume 73 (1): 109-125 (2005). DOI: 10.1007/s10533-004-5165-9 Sites: US-Me2, US-Me3, US-Me4, US-Me5

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

Modelling CO2 And Energy Exchanges In A Northern Semiarid Grassland Using The Carbon- And Nitrogen-Coupled Canadian Land Surface Scheme (C-CLASS)
Zhang, Y., Grant, R., Flanagan, L., Wang, S., Verseghy, D.

The development of carbon (C) and nitrogen (N) simulations is one of the ongoing efforts in the land surface schemes of climate models. The C- and N-coupled Canadian Land Surface Scheme (C-CLASS) was recently modified to better represent grassland ecosystems. Improvements include revised plant growth and senescence calculations that …


Journal: Ecological Modelling, Volume 181 (4): 591-614 (2005). DOI: 10.1016/j.ecolmodel.2004.07.007 Sites: CA-Let

Seasonal And Depth Variation Of Soil Moisture In A Burned Open Savanna (Campo Sujo) In Central Brazil
Quesada, C. A., Miranda, A. C., Hodnett, M. G., Santos, A. J., Miranda, H. S., Breyer, L. M.

The soil water regimes of two areas of open savanna (campo sujo) near Brasilia, Brazil, were monitored between August 1999 and November 2000. Each area was subjected to a different fire regime. Soil water …


Journal: Ecological Applications, Volume 14 (sp4): 33-41 (2004). DOI: 10.1890/01-6017 Sites: BR-Sa1

Fast Labile Carbon Turnover Obscures Sensitivity Of Heterotrophic Respiration From Soil To Temperature: A Model Analysis
Gu, L., Post, W. M., King, A. W.

Labile carbon, although often a small fraction of soil organic carbon (SOC), significantly affects heterotrophic respiration at short timescales because of its rapid decomposition. However, in the current literature, most soil respiration measurements are interpreted without simultaneous information on labile carbon pool dynamics. …


Journal: Global Biogeochemical Cycles, Volume 18 (1): n/a-n/a (2004). DOI: 10.1029/2003gb002119 Sites: US-WBW

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-Me2

A Comparison Of Three Approaches To Modeling Leaf Gas Exchange In Annually Drought-Stressed Ponderosa Pine Forests
Misson, L., Panek, J. A., Goldstein, A. H.
We tested, compared and modified three models of stomatal conductance at the leaf level in a forest ecosystem where drought stress is a major factor controlling forest productivity. The models were tested against 2 years (1999 and 2000) of leaf-level measurements on ponderosa pine (Pinus ponderosaDougl. …


Journal: Tree Physiology, Volume 24 (5): 529-541 (2004). DOI: 10.1093/treephys/24.5.529 Sites: US-Blo

Screening Yield Monitor Data Improves Grain Yield Maps
Simbahan, G. C., Dobermann, A., Ping, J. L.

Yield monitor data contain systematic and random errors, which must be removed for creating accurate yield maps. A general procedure for assessing yield data cleaning methods was applied to a new postprocessing algorithm in which six common types of erroneous yield monitor values were removed: (1) combine header status up; (2) start-/end-pass …


Journal: Agronomy Journal, Volume 96 (4): 1091-1102 (2004). DOI: 10.2134/agronj2004.1091 Sites: US-Ne1, US-Ne2, US-Ne3