Key to evaluating the consequences of woody plant encroachment on water and carbon cycling in semiarid ecosystems is a mechanistic understanding of how biological and non-biological processes influence water loss to the atmosphere. To better understand how precipitation is partitioned into the components of evapotranspiration (bare-soil …
Journal: Hydrological Processes, Volume 20 (15): 3227-3243 (2006), ISBN . DOI: 10.1002/hyp.6329 Sites: US-Whs
Annual budgets and fitted temperature response curves for soil respiration and ecosystem respiration provide useful information for partitioning annual carbon budgets of ecosystems, …
Journal: Global Change Biology, Volume 12 (2): 230-239 (2006), ISBN . DOI: 10.1111/j.1365-2486.2005.01062.x Sites: US-Ho1, US-Ho2, US-Ho3
Fire and harvesting are important disturbances in the boreal forest, driving net biome production. Measurements of net ecosystem production (NEP) over mature forest stands have been made from flux towers for about a decade at the Boreal Ecosystem Research and Monitoring Sites (BERMS) in central Saskatchewan, Canada. Over the last …
Journal: Agricultural And Forest Meteorology, Volume 136 (3-4): 237-251 (2006), ISBN . DOI: 10.1016/j.agrformet.2004.11.012 Sites: CA-SF1, CA-SF2, CA-SF3, CA-SJ1, CA-SJ3
Estimates of terrestrial carbon isotope discrimination are useful to quantify the terrestrial carbon sink. Carbon isotope discrimination by terrestrial ecosystems may vary on seasonal and interannual time frames, because it is affected by processes (e.g. photosynthesis, stomatal conductance, and respiration) that respond to variable …
Journal: Global Change Biology, Volume 12 (4): 710-730 (2006), ISBN . DOI: 10.1111/j.1365-2486.2006.01121.x Sites: US-Me4
Peatlands cover about 21% of the landscape and contain about 80% of the soil carbon stock in western Canada. However, the current rates of carbon accumulation and the environmental controls on ecosystem photosynthesis and respiration in peatland ecosystems are poorly understood. …
Journal: Agricultural And Forest Meteorology, Volume 140 (1-4): 97-114 (2006), ISBN . DOI: 10.1016/j.agrformet.2006.03.022 Sites: CA-WP1
Biological and physical controls regulating variation of seasonal and interannual ecosystem carbon exchange in a scrub oak ecosystem in central Florida were determined by measuring net ecosystem exchange of CO2 (NEE) between the atmosphere and vegetation using …
Journal: Agricultural And Forest Meteorology, Volume 141 (1): 19-34 (2006), ISBN . DOI: 10.1016/j.agrformet.2006.09.002 Sites: US-KS1, US-KS2
We measured net ecosystem CO2 exchange (NEE) using the eddy covariance (EC) technique for 4 years at adjoining old field (OF), planted pine (PP) and hardwood forest (HW) ecosystems in the Duke Forest, NC. To compute annual sums of NEE and its components – gross …
Journal: Agricultural And Forest Meteorology, Volume 141 (1): 2-18 (2006), ISBN . DOI: 10.1016/j.agrformet.2006.09.001 Sites: US-Dk3
Above forest canopies, eddy covariance (EC) measurements of mass (CO2, H2O vapor) and energy exchange, assumed to represent ecosystem fluxes, are commonly …
Journal: Global Change Biology, Volume 12 (5): 883-896 (2006), ISBN . DOI: 10.1111/j.1365-2486.2006.01131.x Sites: US-Dk1, US-Dk2, US-Dk3
Modeling evapotranspiration (ET) in Arctic coastal plain ecosystems is challenging owing to the unique conditions present in this environment, including permafrost, nonvascular vegetation, and a large standing dead vegetation component. In this study the ecosystem process model, BIOME-BGC, was adapted to represent these unique conditions …
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 111 (G02021): n/a-n/a (2006), ISBN . DOI: 10.1029/2005JG000102 Sites: US-Brw
We assessed the successional development of above- and belowground ecosystem biomass and carbon (C) pools in an age-sequence of four White pine (Pinus strobus L.) plantation stands (2-, 15-, 30-, and 65-years-old) in Southern Ontario, Canada. Biomass and C stocks of above- and belowground live and dead tree biomass, understorey …
Journal: Agricultural And Forest Meteorology, Volume 140 (1-4): 51-63 (2006), ISBN . DOI: 10.1016/j.agrformet.2006.08.004 Sites: CA-TP1, CA-TP2, CA-TP3, CA-TP4