Insights on carbon budgets for Ponderosa pine systems growing at three levels of CO[sub 2] and of nitrogen from leaf to whole open-top chamber flux measurements

Conference · Wed Jun 01 00:00:00 EDT 1994 · Bulletin of the Ecological Society of America; (United States)

OSTI ID:7161947

Ball, J T; Picone, J B; Ross, P D; Ross, G N; Johnson, D W ^[1]

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1. Univ. of Nevada, Reno, NV (United States)

At any scale of integration carbon accumulation in the biosphere is a small difference between large input and output terms and is proportional to resource levels. This can result in the impression that growth and carbon accumulation have little to do with either the input or output rates. Our measurements show that rising concentration of CO[sub 2] in the atmosphere results in biospheric influx and efflux of carbon increasing and the proportionality between carbon left and nitrogen in the system changing. A gap exists between the carbon balance inferred from gas-exchange and measured changes in pool sizes. The rhizosphere is the likely harbor for much of this [open quotes]missing carbon[close quotes]. These measurements were made on ponderosa pine saplings growing near Placerville, California USA. The chambers are set at ambient, 525 ppm, 700 ppm CO[sub 2]. Soil nitrogen levels are at the background level, plus 10 g/m[sup [minus]2] or plus 20 g/m[sup [minus]2].

• OSTI ID: 7161947
• Report Number(s): CONF-940894-; CODEN: BECLAG
• Journal Information: Bulletin of the Ecological Society of America; (United States), Vol. 75:2; Conference: Annual Ecological Society of America (ESA) meeting: science and public policy, Knoxville, TN (United States), 7-11 Aug 1994; ISSN 0012-9623
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
54 ENVIRONMENTAL SCIENCES
CARBON DIOXIDE
BIOLOGICAL EFFECTS
ECOLOGICAL CONCENTRATION
NITROGEN
PINES
PLANT GROWTH
CARBON CYCLE
SOIL CHEMISTRY
SOILS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
CONIFERS
ELEMENTS
GROWTH
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PINOPHYTA
PLANTS
TREES
560300* - Chemicals Metabolism & Toxicology
540220 - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)