WATER AND CARBON RELATIONS UNDER AMBIENT AND ELEVATED ATMOSPHERIC CO2

Inhalt "WATER AND CARBON RELATIONS UNDER AMBIENT AND ELEVATED ATMOSPHERIC CO2":

Increasing atmospheric CO2 concentration decreases
stomatal conductance (GS) in many species with
potentially direct affects on both water and carbon
(C) cycles and secondary effects on ecosystem
processes such as competition. Some of these direct
effects were investigated in this study at the Duke
Forest free-air carbon transfer and storage
enrichment experiment (FACE), focusing on sap-flux
scaled mean canopy GS, water use, forest canopy C
uptake and hydraulic properties of two canopy
species, Pinus taeda L. (loblolly pine) and
Liquidambar styraciflua L. (sweetgum), and two sub-
canopy species, Cornus florida L. (flowering dogwood)
and Ulmus alata Michx. (winged elm), subjected to
ambient CO2 and elevated atmospheric CO2
concentrations over three and a half years after
onset of fumigation in 1996 (1997-2000).