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dc.contributor.authorWeber, J. A.en_US
dc.contributor.authorTenhunen, J. D.en_US
dc.contributor.authorJurik, Thomas W.en_US
dc.contributor.authorGates, David M.en_US
dc.date.accessioned2006-09-11T19:21:19Z
dc.date.available2006-09-11T19:21:19Z
dc.date.issued1985-02en_US
dc.identifier.citationWeber, J. A.; Jurik, T. W.; Tenhunen, J. D.; Gates, D. M.; (1985). "Analysis of gas exchange in seedlings of Acer saccharum : integration of field and laboratory studies." Oecologia 65(3): 338-347. <http://hdl.handle.net/2027.42/47755>en_US
dc.identifier.issn0029-8549en_US
dc.identifier.issn1432-1939en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/47755
dc.description.abstractIn the field, photosynthesis of Acer saccharum seedlings was rarely light saturated, even though light saturation occurs at about 100 μmol quanta m -2 s -1 photosynthetic photon flux density (PPFD). PPFD during more than 75% of the daylight period was 50 μmol m -2 s -1 or less. At these low PPFD's there is a marked interaction of PPFD with the initial slope (CE) of the CO 2 response. At PPFD-saturation CE was 0.018 μmol m -2 s -1 /(μl/l). The apparent quantum efficiency (incident PPFD) at saturating CO 2 was 0.05–0.08 mol/mol. and PPFD-saturated CO 2 exchange was 6–8 μmol m -2 s -1 . The ratio of internal CO 2 concentration to external ( C i / C a ) was 0.7 to 0.8 except during sunflecks when it decreased to 0.5. The decrease in C i / C a during sunflecks was the result of the slow response of stomates to increased PPFD compared to the response of net photosynthesis. An empirical model, which included the above parameters was used to simulate the measured CO 2 exchange rate for portions of two days. Parameter values for the model were determined in experiments separate from the daily time courses being sumulated. Analysis of the field data, partly through the use of simulations, indicate that the elimination of sunflecks would reduce net carbon gain by 5–10%.en_US
dc.format.extent1040132 bytes
dc.format.extent3115 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.language.isoen_US
dc.publisherSpringer-Verlagen_US
dc.subject.otherEcologyen_US
dc.subject.otherPlant Sciencesen_US
dc.subject.otherLife Sciencesen_US
dc.titleAnalysis of gas exchange in seedlings of Acer saccharum : integration of field and laboratory studiesen_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelNatural Resources and Environmenten_US
dc.subject.hlbsecondlevelMolecular, Cellular and Developmental Biologyen_US
dc.subject.hlbsecondlevelEcology and Evolutionary Biologyen_US
dc.subject.hlbtoplevelHealth Sciencesen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumBiological Station and Botanical Gardens, University of Michigan, 48109-1048, Ann Arbor, MI, USAen_US
dc.contributor.affiliationumBiological Station and Botanical Gardens, University of Michigan, 48109-1048, Ann Arbor, MI, USAen_US
dc.contributor.affiliationumBiological Station and Botanical Gardens, University of Michigan, 48109-1048, Ann Arbor, MI, USA; Lehrstuhl für Botanik II der Universität Würzburg, Würzburg, Federal Republic of Germanyen_US
dc.contributor.affiliationumBiological Station and Botanical Gardens, University of Michigan, 48109-1048, Ann Arbor, MI, USAen_US
dc.contributor.affiliationumcampusAnn Arboren_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/47755/1/442_2004_Article_BF00378907.pdfen_US
dc.identifier.doihttp://dx.doi.org/10.1007/BF00378907en_US
dc.identifier.sourceOecologiaen_US
dc.owningcollnameInterdisciplinary and Peer-Reviewed


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