Elevated CO2 did not affect the hydrological balance of a mature native Eucalyptus woodland
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| hal.structure.identifier | Hawkesbury Institute for the Environment | |
| dc.contributor.author | GIMENO, Teresa E. | |
| hal.structure.identifier | Commonwealth Scientific and Industrial Research Organisation [Australia] [CSIRO] | |
| hal.structure.identifier | Australian Research Council [ARC] | |
| dc.contributor.author | MCVICAR, Tim R. | |
| hal.structure.identifier | Commonwealth Scientific and Industrial Research Organisation [Australia] [CSIRO] | |
| dc.contributor.author | O'GRADY, Anthony P. | |
| hal.structure.identifier | Hawkesbury Institute for the Environment | |
| dc.contributor.author | TISSUE, David T. | |
| hal.structure.identifier | Hawkesbury Institute for the Environment | |
| dc.contributor.author | ELLSWORTH, David S. | |
| dc.date.accessioned | 2024-04-08T12:06:13Z | |
| dc.date.available | 2024-04-08T12:06:13Z | |
| dc.date.issued | 2018 | |
| dc.identifier.issn | 1354-1013 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/196391 | |
| dc.description.abstractEn | Elevated atmospheric CO2 concentration (eC(a)) might reduce forest water-use, due to decreased transpiration, following partial stomatal closure, thus enhancing water-use efficiency and productivity at low water availability. If evapotranspiration (E-t) is reduced, it may subsequently increase soil water storage (S) or surface runoff (R) and drainage (D-g), although these could be offset or even reversed by changes in vegetation structure, mainly increased leaf area index (L). To understand the effect of eC(a) in a water-limited ecosystem, we tested whether 2years of eC(a) (40% increase) affected the hydrological partitioning in a mature water-limited Eucalyptus woodland exposed to Free-Air CO2 Enrichment (FACE). This timeframe allowed us to evaluate whether physiological effects of eC(a) reduced stand water-use irrespective of L, which was unaffected by eC(a) in this timeframe. We hypothesized that eC(a) would reduce tree-canopy transpiration (E-tree), but excess water from reduced E-tree would be lost via increased soil evaporation and understory transpiration (E-floor) with no increase in S, R or D-g. We computed E-t, S, R and D-g from measurements of sapflow velocity, L, soil water content (), understory micrometeorology, throughfall and stemflow. We found that eC(a) did not affect E-tree, E-floor, S or at any depth (to 4.5m) over the experimental period. We closed the water balance for dry seasons with no differences in the partitioning to R and D-g between C-a levels. Soil temperature and were the main drivers of E-floor while vapour pressure deficit-controlled E-tree, though eC(a) did not significantly affect any of these relationships. Our results suggest that in the short-term, eC(a) does not significantly affect ecosystem water-use at this site. We conclude that water-savings under eC(a) mediated by either direct effects on plant transpiration or by indirect effects via changes in L or soil moisture availability are unlikely in water-limited mature eucalypt woodlands. | |
| dc.language.iso | en | |
| dc.publisher | Wiley | |
| dc.subject | interception | |
| dc.subject | stomatal conductance | |
| dc.subject.en | Eucalyptus tereticornis | |
| dc.subject.en | climate change | |
| dc.subject.en | free-air CO2 enrichment | |
| dc.subject.en | tree water | |
| dc.subject.en | water-use efficiency | |
| dc.title.en | Elevated CO2 did not affect the hydrological balance of a mature native Eucalyptus woodland | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1111/gcb.14139 | |
| dc.subject.hal | Sciences du Vivant [q-bio] | |
| dc.subject.hal | Sciences de l'environnement | |
| dc.description.sponsorshipEurope | Unveiling Stomata 24/7: Using Stable Isotopes and COS to quantify diurnal and nocturnal carbon and water vegetation-atmosphere Fluxes under future climate scenarios | |
| bordeaux.journal | Global Change Biology | |
| bordeaux.page | 3010-3024 | |
| bordeaux.volume | 24 | |
| bordeaux.hal.laboratories | Interactions Soil Plant Atmosphere (ISPA) - UMR 1391 | * |
| bordeaux.issue | 7 | |
| bordeaux.institution | Bordeaux Sciences Agro | |
| bordeaux.institution | INRAE | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-02620882 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-02620882v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Global%20Change%20Biology&rft.date=2018&rft.volume=24&rft.issue=7&rft.spage=3010-3024&rft.epage=3010-3024&rft.eissn=1354-1013&rft.issn=1354-1013&rft.au=GIMENO,%20Teresa%20E.&MCVICAR,%20Tim%20R.&O'GRADY,%20Anthony%20P.&TISSUE,%20David%20T.&ELLSWORTH,%20David%20S.&rft.genre=article |
Files in this item
| Files | Size | Format | View |
|---|---|---|---|
|
There are no files associated with this item. |
|||