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- W2000921254 abstract "Carbon dioxide, water vapour, and energy fluxes vary spatially and temporally within forested environments. However, it is not clear to what extent they vary as a result of variability in the spatial distribution of biomass and elevation. The following study presents a new methodology for extracting changes in the structural characteristics of vegetation and elevation within footprint areas, for direct comparison with eddy covariance (EC) CO 2 flux concentrations. The purpose was to determine whether within-site canopy structure and local elevation influenced CO 2 fluxes in a mature jack pine ( Pinus banksiana Lamb.) forest located in Saskatchewan, Canada. Airborne light detection and ranging (lidar) was used to extract tree height, canopy depth, foliage cover, and elevation within 30 min flux footprints. Within-footprint mean structural components and elevation were related to 30 min mean net ecosystem productivity (NEP) and gross ecosystem production (GEP). NEP and GEP were modeled using multiple regression, and when compared with measured fluxes, almost all periods showed improvements in the prediction of flux concentration when canopy structure and elevation were included. Increased biomass was related to increased NEP and GEP in June and August when the ecosystem was not limited by soil moisture. On a daily basis, fractional cover and elevation had varying but significant influences on CO 2 fluxes." @default.
- W2000921254 created "2016-06-24" @default.
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- W2000921254 date "2008-11-01" @default.
- W2000921254 modified "2023-09-26" @default.
- W2000921254 title "Influences of vegetation structure and elevation on CO<sub>2</sub> uptake in a mature jack pine forest in Saskatchewan, Canada" @default.
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- W2000921254 doi "https://doi.org/10.1139/x08-121" @default.
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