Photosynthetic carbon isotope discrimination and its relationship to the carbon isotope signals of stem, soil and ecosystem respiration
| hal.structure.identifier | Écologie fonctionnelle et physique de l'environnement [EPHYSE] | |
| hal.structure.identifier | School of GeoSciences | |
| hal.structure.identifier | Department of Plant Sciences | |
| dc.contributor.author | WINGATE, Lisa | |
| hal.structure.identifier | Écologie fonctionnelle et physique de l'environnement [EPHYSE] | |
| dc.contributor.author | OGÉE, Jérôme | |
| hal.structure.identifier | Biodiversité, Gènes & Communautés [BioGeCo] | |
| dc.contributor.author | BURLETT, Régis | |
| hal.structure.identifier | Écologie fonctionnelle et physique de l'environnement [EPHYSE] | |
| dc.contributor.author | BOSC, Alexandre | |
| hal.structure.identifier | Écologie fonctionnelle et physique de l'environnement [EPHYSE] | |
| dc.contributor.author | DEVAUX, Marion | |
| hal.structure.identifier | University of Edinburgh [Edin.] | |
| dc.contributor.author | GRACE, John | |
| hal.structure.identifier | Écologie fonctionnelle et physique de l'environnement [EPHYSE] | |
| dc.contributor.author | LOUSTAU, Denis | |
| hal.structure.identifier | Institut für Landschaftsstoffdynamik | |
| dc.contributor.author | GESSLER, Arthur | |
| dc.date.issued | 2010 | |
| dc.identifier.issn | 0028-646X | |
| dc.description.abstractEn | Photosynthetic carbon (C) isotope discrimination (ΔΑ) labels photosynthates (δA) and atmospheric CO2 (δa) with variable C isotope compositions during fluctuating environmental conditions. In this context, the C isotope composition of respired CO2 within ecosystems is often hypothesized to vary temporally with ΔΑ. We investigated the relationship between ΔΑ and the C isotope signals from stem (δW), soil (δS) and ecosystem (δE) respired CO2 to environmental fluctuations, using novel tuneable diode laser absorption spectrometer instrumentation in a mature maritime pine forest. Broad seasonal changes in ΔΑ were reflected in δW,δS and δE. However, respired CO2 signals had smaller short-term variations than ΔA and were offset and delayed by 2–10 d, indicating fractionation and isotopic mixing in a large C pool. Variations in δS did not follow ΔA at all times, especially during rainy periods and when there is a strong demand for C allocation above ground. It is likely that future isotope-enabled vegetation models will need to develop transfer functions that can account for these phenomena in order to interpret and predict the isotopic impact of biosphere gas exchange on the C isotope composition of atmospheric CO2. | |
| dc.language.iso | en | |
| dc.publisher | Wiley | |
| dc.title.en | Photosynthetic carbon isotope discrimination and its relationship to the carbon isotope signals of stem, soil and ecosystem respiration | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1111/j.1469-8137.2010.03384.x | |
| dc.subject.hal | Sciences du Vivant [q-bio]/Biologie végétale/Phytopathologie et phytopharmacie | |
| bordeaux.journal | New Phytologist | |
| bordeaux.page | 576-589 | |
| bordeaux.volume | 188 | |
| bordeaux.issue | 2 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-02666929 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-02666929v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=New%20Phytologist&rft.date=2010&rft.volume=188&rft.issue=2&rft.spage=576-589&rft.epage=576-589&rft.eissn=0028-646X&rft.issn=0028-646X&rft.au=WINGATE,%20Lisa&OG%C3%89E,%20J%C3%A9r%C3%B4me&BURLETT,%20R%C3%A9gis&BOSC,%20Alexandre&DEVAUX,%20Marion&rft.genre=article |
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