We determined concentrations and fluxes of dissolved organic carbon (DOC) in precipitation, throughfall, forest floor and mineral soil leachates from June 2004 to May 2006 across an age-sequence (2-, 15-, 30-, and 65-year-old) of white pine (Pinus strobus L.) forests in southern Ontario, Canada. …
Journal: Biogeochemistry, Volume 86 (1): 1-17 (2007), ISBN . DOI: 10.1007/s10533-007-9138-7 Sites: CA-TP1
Ecosystem water use efficiency (EWUE) is defined as the net carbon uptake per amount of water lost from the ecosystem and is a useful measure of the functionality in semiarid shrub and grassland communities. C4 grasses have higher water use efficiency (WUE) than do C3 shrubs, although it has been postulated …
Journal: Rangeland Ecology & Management, Volume 60 (5): 464-470 (2007), ISBN . DOI: 10.2111/1551-5028(2007)60[464:ewueia]2.0.co;2 Sites: US-Wkg
We analyzed 13 years (1992−2004) of CO2 flux data, biometry, and meteorology from a mixed deciduous forest in central Massachusetts. Annual net uptake of CO2 ranged from 1.0 to …
Journal: Journal Of Geophysical Research, Volume 112 (G2): (2007), ISBN . DOI: 10.1029/2006JG000293 Sites: US-Ha1
In the southeastern United States (SE), the conversion of abandoned agricultural land to forests is the dominant feature of land-cover change. However, few attempts have been made to quantify the impact of such conversion on surface temperature. Here, this issue is explored experimentally and analytically in three adjacent ecosystems …
Journal: Geophysical Research Letters, Volume 34 (21): n/a-n/a (2007), ISBN . DOI: 10.1029/2007gl031296 Sites: US-Dk3
We present a decadal (1994–2004) record of carbon dioxide flux in a 160-year-old black spruce forest/veneer bog complex in central Manitoba, Canada. The ecosystem shifted …
Journal: Global Change Biology, Volume 13 (3): 577-590 (2007), ISBN . DOI: 10.1111/j.1365-2486.2006.01221.x Sites: CA-Man
Terrestrial ecosystems sequester 2.1 Pg of atmospheric carbon annually. A large amount of the terrestrial sink is realized by forests. However, considerable uncertainties …
Journal: Global Change Biology, Volume 13 (12): 2509-2537 (2007), ISBN . DOI: 10.1111/j.1365-2486.2007.01439.x Sites: BR-Ma2
Forest fire dramatically affects the carbon storage and underlying mechanisms that control the carbon balance of recovering ecosystems. In western North America where fire extent has increased in recent years, we measured carbon pools and fluxes in moderately and severely burned forest stands 2 years after a fire to determine the …
Journal: Global Change Biology, Volume 13 (8): 1748-1760 (2007), ISBN . DOI: 10.1111/j.1365-2486.2007.01368.x Sites: US-Me1
Increased canopy leaf area (L) may lead to higher forest productivity and alter processes such as species dynamics and ecosystem mass and energy fluxes. Few CO2 enrichment studies have been conducted in closed canopy forests and none have shown a sustained enhancement of L. We reconstructed 8 years (1996–2003) …
Journal: Global Change Biology, Volume 13 (12): 2479-2497 (2007), ISBN . DOI: 10.1111/j.1365-2486.2007.01455.x Sites: US-Dk3
The vegetation in the core region of the North American monsoon (NAM) system changes dramatically after the onset of the summer rains so that large changes may be expected in the surface fluxes of radiation, heat, and moisture. Most of this region lies in the rugged terrain of western Mexico and very few measurements of these fluxes …
Journal: Journal Of Climate, Volume 20 (9): 1810-1820 (2007), ISBN . DOI: 10.1175/jcli4088.1 Sites: US-Whs, US-Wkg
The allometry and partitioning of above- and belowground tree biomass was studied in an age-sequence of four eastern white pine (Pinus strobus L.) forests (2-, 15-, 30-, and 65-year-old) in southern Ontario, Canada. Biomass in each tree component, i.e. foliage, …
Journal: Forest Ecology And Management, Volume 253 (1-3): 68-80 (2007), ISBN . DOI: 10.1016/j.foreco.2007.07.003 Sites: CA-TP1, CA-TP2, CA-TP3, CA-TP4