Photosynthesis, carboxylation and leaf nitrogen responses of 16 species to elevated pCO 2 across four free-air CO 2 enrichment experiments in forest, grassland and desert
dc.contributor.author | Ellsworth, David S. | en_US |
dc.contributor.author | Reich, Peter B. | en_US |
dc.contributor.author | Naumburg, Elke S. | en_US |
dc.contributor.author | Koch, George W. | en_US |
dc.contributor.author | Kubiske, Mark E. | en_US |
dc.contributor.author | Smith, Stan D. | en_US |
dc.date.accessioned | 2010-06-01T19:41:54Z | |
dc.date.available | 2010-06-01T19:41:54Z | |
dc.date.issued | 2004-12 | en_US |
dc.identifier.citation | Ellsworth, David S.; Reich, Peter B.; Naumburg, Elke S.; Koch, George W.; Kubiske, Mark E.; Smith, Stan D. (2004). "Photosynthesis, carboxylation and leaf nitrogen responses of 16 species to elevated pCO 2 across four free-air CO 2 enrichment experiments in forest, grassland and desert." Global Change Biology 10(12): 2121-2138. <http://hdl.handle.net/2027.42/72832> | en_US |
dc.identifier.issn | 1354-1013 | en_US |
dc.identifier.issn | 1365-2486 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/72832 | |
dc.description.abstract | The magnitude of changes in carboxylation capacity in dominant plant species under long-term elevated CO 2 exposure (elevated pC a ) directly impacts ecosystem CO 2 assimilation from the atmosphere. We analyzed field CO 2 response curves of 16 C 3 species of different plant growth forms in favorable growth conditions in four free-air CO 2 enrichment (FACE) experiments in a pine and deciduous forest, a grassland and a desert. Among species and across herb, tree and shrub growth forms there were significant enhancements in CO 2 assimilation ( A ) by +40±5% in elevated pC a (49.5–57.1 Pa), although there were also significant reductions in photosynthetic capacity in elevated pC a in some species. Photosynthesis at a common pC a ( A a ) was significantly reduced in five species growing under elevated pC a , while leaf carboxylation capacity ( V cmax ) was significantly reduced by elevated pC a in seven species (change of −19±3% among these species) across different growth forms and FACE sites. Adjustments in V cmax with elevated pC a were associated with changes in leaf N among species, and occurred in species with the highest leaf N. Elevated pC a treatment did not affect the mass-based relationships between A or V cmax and N, which differed among herbs, trees and shrubs. Thus, effects of elevated pC a on leaf C assimilation and carboxylation capacity occurred largely through changes in leaf N, rather than through elevated pC a effects on the relationships themselves. Maintenance of leaf carboxylation capacity among species in elevated pC a at these sites depends on maintenance of canopy N stocks, with leaf N depletion associated with photosynthetic capacity adjustments. Since CO 2 responses can only be measured experimentally on a small number of species, understanding elevated CO 2 effects on canopy N m and N a will greatly contribute to an ability to model responses of leaf photosynthesis to atmospheric CO 2 in different species and plant growth forms. | en_US |
dc.format.extent | 237189 bytes | |
dc.format.extent | 3109 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Blackwell Science Ltd | en_US |
dc.rights | © 2004 Blackwell Publishing Ltd | en_US |
dc.subject.other | Downregulation | en_US |
dc.subject.other | Elevated CO 2 | en_US |
dc.subject.other | Free-air CO 2 Enrichment | en_US |
dc.subject.other | Leaf Carboxylation Capacity | en_US |
dc.subject.other | Leaf Nitrogen | en_US |
dc.subject.other | Nitrogen Allocation to RuBP Carboxylase Enzyme | en_US |
dc.subject.other | Photosynthesis–Nitrogen Relationships | en_US |
dc.subject.other | Photosynthetic Nitrogen-use Efficiency | en_US |
dc.subject.other | Plant Functional Groups | en_US |
dc.title | Photosynthesis, carboxylation and leaf nitrogen responses of 16 species to elevated pCO 2 across four free-air CO 2 enrichment experiments in forest, grassland and desert | 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 East University Ave., Ann Arbor, MI 48109, USA , | en_US |
dc.contributor.affiliationother | † Department of Forest Resources, University of Minnesota, St Paul, MN 55108, USA , | en_US |
dc.contributor.affiliationother | † Department of Biological Sciences, University of Nevada-Las Vegas, Las Vegas, NV 89154, USA , | en_US |
dc.contributor.affiliationother | § Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA , | en_US |
dc.contributor.affiliationother | ¶ USDA Forest Service, North Central Research Station, Forestry Sciences Lab 5985 Hwy K, Rhinelander, WI 54501, USA | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/72832/1/j.1365-2486.2004.00867.x.pdf | |
dc.identifier.doi | 10.1111/j.1365-2486.2004.00867.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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