Exposure to an enriched CO 2 atmosphere alters carbon assimilation and allocation in a pine forest ecosystem
dc.contributor.author | Schäfer, Karina V. R. | en_US |
dc.contributor.author | Oren, Ram | en_US |
dc.contributor.author | Ellsworth, David S. | en_US |
dc.contributor.author | Lai, Chun-Ta | en_US |
dc.contributor.author | Herrick, Jeffrey D. | en_US |
dc.contributor.author | Finzi, Adrien C. | en_US |
dc.contributor.author | Richter, Daniel D. | en_US |
dc.contributor.author | Katul, Gabriel G. | en_US |
dc.date.accessioned | 2010-06-01T20:53:09Z | |
dc.date.available | 2010-06-01T20:53:09Z | |
dc.date.issued | 2003-10 | en_US |
dc.identifier.citation | SchÄfer, Karina V . R.; Oren, Ram; Ellsworth, David S.; Lai, Chun-Ta; Herrick, Jeffrey D.; Finzi, Adrien C.; Richter, Daniel D.; Katul, Gabriel G. (2003). "Exposure to an enriched CO 2 atmosphere alters carbon assimilation and allocation in a pine forest ecosystem." Global Change Biology 9(10): 1378-1400. <http://hdl.handle.net/2027.42/73982> | en_US |
dc.identifier.issn | 1354-1013 | en_US |
dc.identifier.issn | 1365-2486 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/73982 | |
dc.description.abstract | We linked a leaf-level CO 2 assimilation model with a model that accounts for light attenuation in the canopy and measurements of sap-flux-based canopy conductance into a new canopy conductance-constrained carbon assimilation (4C-A) model. We estimated canopy CO 2 uptake ( A nC ) at the Duke Forest free-air CO 2 enrichment (FACE) study. Rates of A nC estimated from the 4C-A model agreed well with leaf gas exchange measurements ( A net ) in both CO 2 treatments. Under ambient conditions, monthly sums of net CO 2 uptake by the canopy ( A nC ) were 13% higher than estimates based on eddy-covariance and chamber measurements. Annual estimates of A nC were only 3% higher than carbon (C) accumulations and losses estimated from ground-based measurements for the entire stand. The C budget for the Pinus taeda component was well constrained (within 1% of ground-based measurements). Although the closure of the C budget for the broadleaf species was poorer (within 20%), these species are a minor component of the forest. Under elevated CO 2 , the C used annually for growth, turnover, and respiration balanced only 80% of the A nC . Of the extra 700 g C m −2 a −1 (1999 and 2000 average), 86% is attributable to surface soil CO 2 efflux. This suggests that the production and turnover of fine roots was underestimated or that mycorrhizae and rhizodeposition became an increasingly important component of the C balance. Under elevated CO 2 , net ecosystem production increased by 272 g C m −2 a −1 : 44% greater than under ambient CO 2 . The majority (87%) of this C was sequestered in a moderately long-term C pool in wood, with the remainder in the forest floor–soil subsystem. | en_US |
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dc.format.extent | 3109 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Blackwell Science Ltd | en_US |
dc.rights | © 2003 Blackwell Publishing Ltd | en_US |
dc.subject.other | Canopy Stomatal Conductance | en_US |
dc.subject.other | Free Air CO 2 Enrichment | en_US |
dc.subject.other | Net Ecosystem Exchange | en_US |
dc.subject.other | Net Primary Productivity | en_US |
dc.subject.other | Plant Canopy Modelling | en_US |
dc.subject.other | Respiration | en_US |
dc.title | Exposure to an enriched CO 2 atmosphere alters carbon assimilation and allocation in a pine forest ecosystem | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Ecology and Evolutionary Biology | en_US |
dc.subject.hlbsecondlevel | Geology and Earth Sciences | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | † School of Natural Resources and Environment, University of Michigan, 430 E. University Ave., Ann Arbor, MI 48109, USA , | en_US |
dc.contributor.affiliationother | Nicholas School of the Environment and Earth Sciences, Box 90328, Durham, NC 27708, USA , | en_US |
dc.contributor.affiliationother | † Department of Biology, University of Utah, Salt Lake City, UT 84112, USA , | en_US |
dc.contributor.affiliationother | § West Virginia University, Morgantown, WV 26506, USA , | en_US |
dc.contributor.affiliationother | ¶ Department of Biology, Boston University, 5 Cunningham St., Boston, MA 02215, USA | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/73982/1/j.1365-2486.2003.00662.x.pdf | |
dc.identifier.doi | 10.1046/j.1365-2486.2003.00662.x | en_US |
dc.identifier.source | Global Change Biology | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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