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dc.contributor.authorChristoffersen, Bradley
dc.contributor.authorGloor, M
dc.contributor.authorFauset, S
dc.contributor.authorFyllas, NM
dc.contributor.authorGalbraith, DR
dc.contributor.authorBaker, TR
dc.contributor.authorKruijt, Bart
dc.contributor.authorRowland, L
dc.contributor.authorFisher, RA
dc.contributor.authorBinks, OJ
dc.contributor.authorSevanto, S
dc.contributor.authorXu, C
dc.contributor.authorJansen, S
dc.contributor.authorChoat, B
dc.contributor.authorMencuccini, M
dc.contributor.authorMcDowell, NG
dc.contributor.authorMeir, P
dc.date.accessioned2018-11-28T16:00:22Z
dc.date.available2018-11-28T16:00:22Z
dc.date.issued2016-11-24
dc.identifier.issn1991-959X
dc.identifier.issn1991-9603
dc.identifier.urihttp://hdl.handle.net/10026.1/12918
dc.description.abstract

<jats:p>Abstract. Forest ecosystem models based on heuristic water stress functions poorly predict tropical forest response to drought partly because they do not capture the diversity of hydraulic traits (including variation in tree size) observed in tropical forests. We developed a continuous porous media approach to modeling plant hydraulics in which all parameters of the constitutive equations are biologically interpretable and measurable plant hydraulic traits (e.g., turgor loss point πtlp, bulk elastic modulus ε, hydraulic capacitance Cft, xylem hydraulic conductivity ks,max, water potential at 50 % loss of conductivity for both xylem (P50,x) and stomata (P50,gs), and the leaf : sapwood area ratio Al : As). We embedded this plant hydraulics model within a trait forest simulator (TFS) that models light environments of individual trees and their upper boundary conditions (transpiration), as well as providing a means for parameterizing variation in hydraulic traits among individuals. We synthesized literature and existing databases to parameterize all hydraulic traits as a function of stem and leaf traits, including wood density (WD), leaf mass per area (LMA), and photosynthetic capacity (Amax), and evaluated the coupled model (called TFS v.1-Hydro) predictions, against observed diurnal and seasonal variability in stem and leaf water potential as well as stand-scaled sap flux. Our hydraulic trait synthesis revealed coordination among leaf and xylem hydraulic traits and statistically significant relationships of most hydraulic traits with more easily measured plant traits. Using the most informative empirical trait–trait relationships derived from this synthesis, TFS v.1-Hydro successfully captured individual variation in leaf and stem water potential due to increasing tree size and light environment, with model representation of hydraulic architecture and plant traits exerting primary and secondary controls, respectively, on the fidelity of model predictions. The plant hydraulics model made substantial improvements to simulations of total ecosystem transpiration. Remaining uncertainties and limitations of the trait paradigm for plant hydraulics modeling are highlighted. </jats:p>

dc.format.extent4227-4255
dc.languageen
dc.language.isoen
dc.publisherCopernicus GmbH
dc.titleLinking hydraulic traits to tropical forest function in a size-structured and trait-driven model (TFS v.1-Hydro)
dc.typejournal-article
dc.typeJournal Article
plymouth.author-urlhttps://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000388722800001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008
plymouth.issue11
plymouth.volume9
plymouth.publication-statusPublished online
plymouth.journalGeoscientific Model Development
dc.identifier.doi10.5194/gmd-9-4227-2016
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Geography, Earth and Environmental Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA06 Agriculture, Veterinary and Food Science
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.identifier.eissn1991-9603
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.5194/gmd-9-4227-2016
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review


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