Forest fine-root production and nitrogen use under elevated CO 2 : contrasting responses in evergreen and deciduous trees explained by a common principle
dc.contributor.author | Franklin, Oskar | en_US |
dc.contributor.author | McMurtrie, Ross E. | en_US |
dc.contributor.author | Iversen, Colleen M. | en_US |
dc.contributor.author | Crous, Kristine Y. | en_US |
dc.contributor.author | Finzi, Adrien C. | en_US |
dc.contributor.author | Tissue, David T. | en_US |
dc.contributor.author | Ellsworth, David S. | en_US |
dc.contributor.author | Oren, Ram | en_US |
dc.contributor.author | Norby, Richard J. | en_US |
dc.date.accessioned | 2010-06-01T19:55:22Z | |
dc.date.available | 2010-06-01T19:55:22Z | |
dc.date.issued | 2009-01 | en_US |
dc.identifier.citation | FRANKLIN, OSKAR; McMURTRIE, ROSS E.; IVERSEN, COLLEEN M.; CROUS, KRISTINE Y.; FINZI, ADRIEN C.; TISSUE, DAVID T.; ELLSWORTH, DAVID S.; OREN, RAM; NORBY, RICHARD J. (2009). "Forest fine-root production and nitrogen use under elevated CO 2 : contrasting responses in evergreen and deciduous trees explained by a common principle." Global Change Biology 15(1): 132-144. <http://hdl.handle.net/2027.42/73052> | en_US |
dc.identifier.issn | 1354-1013 | en_US |
dc.identifier.issn | 1365-2486 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/73052 | |
dc.description.abstract | Despite the importance of nitrogen (N) limitation of forest carbon (C) sequestration at rising atmospheric CO 2 concentration, the mechanisms responsible are not well understood. To elucidate the interactive effects of elevated CO 2 (eCO 2 ) and soil N availability on forest productivity and C allocation, we hypothesized that (1) trees maximize fitness by allocating N and C to maximize their net growth and (2) that N uptake is controlled by soil N availability and root exploration for soil N. We tested this model using data collected in Free-Air CO 2 Enrichment sites dominated by evergreen ( Pinus taeda ; Duke Forest) and deciduous [ Liquidambar styraciflua ; Oak Ridge National Laboratory (ORNL)] trees. The model explained 80–95% of variation in productivity and N-uptake data among eCO 2 , N fertilization and control treatments over 6 years. The model explains why fine-root production increased, and why N uptake increased despite reduced soil N availability under eCO 2 at ORNL and Duke. In agreement with observations at other sites, the model predicts that soil N availability reduced below a critical level diminishes all eCO 2 responses. At Duke, a negative feedback between reduced soil N availability and N uptake prevented progressive reduction in soil N availability at eCO 2 . At ORNL, soil N availability progressively decreased because it did not trigger reductions in N uptake; N uptake was maintained at ORNL through a large increase in the production of fast turnover fine roots. This implies that species with fast root turnover could be more prone to progressive N limitation of carbon sequestration in woody biomass than species with slow root turnover, such as evergreens. However, longer term data are necessary for a thorough evaluation of this hypothesis. The success of the model suggests that the principle of maximization of net growth to control growth and allocation could serve as a basis for simplification and generalization of larger scale forest and ecosystem models, for example by removing the need to specify parameters for relative foliage/stem/root allocation. | en_US |
dc.format.extent | 228280 bytes | |
dc.format.extent | 3109 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Blackwell Publishing Ltd | en_US |
dc.rights | Journal compilation © 2009 Blackwell Publishing | en_US |
dc.subject.other | Allocation | en_US |
dc.subject.other | Elevated Carbon Dioxide | en_US |
dc.subject.other | FACE Experiments | en_US |
dc.subject.other | Fine-root Longevity | en_US |
dc.subject.other | Forest Growth Model | en_US |
dc.subject.other | Optimization | en_US |
dc.subject.other | Plant Theory | en_US |
dc.subject.other | Soil N Availability | en_US |
dc.subject.other | Soil N Uptake | en_US |
dc.title | Forest fine-root production and nitrogen use under elevated CO 2 : contrasting responses in evergreen and deciduous trees explained by a common principle | 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, 440 Church Street, Ann Arbor, MI 48109-1115, USA , | en_US |
dc.contributor.affiliationother | School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia , | en_US |
dc.contributor.affiliationother | † International Institute for Applied Systems Analysis (IIASA), A-2361 Laxenburg, Austria , | en_US |
dc.contributor.affiliationother | † Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN 37996, USA , | en_US |
dc.contributor.affiliationother | § Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6422, USA , | en_US |
dc.contributor.affiliationother | ∥ Department of Biology, Boston University, Boston, MA 02215, USA , | en_US |
dc.contributor.affiliationother | Department of Biological Sciences, Texas Tech University, Flint and Main Street Lubbock, TX 79409-3131, USA , | en_US |
dc.contributor.affiliationother | †† Centre for Plant and Food Science, University of Western Sydney, Penrith South DC, NSW 1797, Australia , | en_US |
dc.contributor.affiliationother | †† Nicholas School of the Environment and Earth Sciences, Duke University, Durham, NC 27708-0328, USA | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/73052/1/j.1365-2486.2008.01710.x.pdf | |
dc.identifier.doi | 10.1111/j.1365-2486.2008.01710.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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