Re-assessment of plant carbon dynamics at the Duke free-air CO(2) enrichment site : interactions of atmospheric [CO(2)] with nitrogen and water availability over stand development

*The potential for elevated [CO(2)]-induced changes to plant carbon (C) storage, through modifications in plant production and allocation of C among plant pools, is an important source of uncertainty when predicting future forest function. Utilizing 10 yr of data from the Duke free-air CO(2) enrichm...

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Veröffentlicht in:The New phytologist. - 1979. - 185(2010), 2 vom: 01. Jan., Seite 514-28
1. Verfasser: McCarthy, Heather R (VerfasserIn)
Weitere Verfasser: Oren, Ram, Johnsen, Kurt H, Gallet-Budynek, Anne, Pritchard, Seth G, Cook, Charles W, Ladeau, Shannon L, Jackson, Robert B, Finzi, Adrien C
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2010
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Water 059QF0KO0R Carbon Dioxide 142M471B3J Carbon 7440-44-0 Nitrogen N762921K75
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520 |a *The potential for elevated [CO(2)]-induced changes to plant carbon (C) storage, through modifications in plant production and allocation of C among plant pools, is an important source of uncertainty when predicting future forest function. Utilizing 10 yr of data from the Duke free-air CO(2) enrichment site, we evaluated the dynamics and distribution of plant C. *Discrepancy between heights measured for this study and previously calculated heights required revision of earlier allometrically based biomass determinations, resulting in higher (up to 50%) estimates of standing biomass and net primary productivity than previous assessments. *Generally, elevated [CO(2)] caused sustained increases in plant biomass production and in standing C, but did not affect the partitioning of C among plant biomass pools. Spatial variation in net primary productivity and its [CO(2)]-induced enhancement was controlled primarily by N availability, with the difference between precipitation and potential evapotranspiration explaining most interannual variability. Consequently, [CO(2)]-induced net primary productivity enhancement ranged from 22 to 30% in different plots and years. *Through quantifying the effects of nutrient and water availability on the forest productivity response to elevated [CO(2)], we show that net primary productivity enhancement by elevated [CO(2)] is not uniform, but rather highly dependent on the availability of other growth resources 
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700 1 |a Oren, Ram  |e verfasserin  |4 aut 
700 1 |a Johnsen, Kurt H  |e verfasserin  |4 aut 
700 1 |a Gallet-Budynek, Anne  |e verfasserin  |4 aut 
700 1 |a Pritchard, Seth G  |e verfasserin  |4 aut 
700 1 |a Cook, Charles W  |e verfasserin  |4 aut 
700 1 |a Ladeau, Shannon L  |e verfasserin  |4 aut 
700 1 |a Jackson, Robert B  |e verfasserin  |4 aut 
700 1 |a Finzi, Adrien C  |e verfasserin  |4 aut 
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