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Beyond carbon flux partitioning: Carbon allocation and nonstructural carbon dynamics inferred from continuous fluxes

hal.structure.identifierFujian Normal University [Fujian]
hal.structure.identifierNorth Carolina State University [Raleigh] [NC State]
dc.contributor.authorMIAO, Guofang
hal.structure.identifierTexas A&M University System
hal.structure.identifierNorth Carolina State University [Raleigh] [NC State]
dc.contributor.authorNOORMETS, Asko
hal.structure.identifierSouthern Research Station
dc.contributor.authorGAVAZZI, Michael
hal.structure.identifierNorthern Arizona University [Flagstaff]
dc.contributor.authorMITRA, Bhaskar
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
hal.structure.identifierDuke University [Durham]
dc.contributor.authorDOMEC, Jean‐christophe
hal.structure.identifierSouthern Research Sation
dc.contributor.authorSUN, Ge
hal.structure.identifierSouthern Research Sation
dc.contributor.authorMCNULTY, Steve
hal.structure.identifierSouthern Research Sation
dc.contributor.authorKING, John
dc.date.accessioned2024-04-08T11:46:49Z
dc.date.available2024-04-08T11:46:49Z
dc.date.issued2022
dc.identifier.issn1051-0761
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195249
dc.description.abstractEnCarbon (C) allocation and nonstructural carbon (NSC) dynamics play essential roles in plant growth and survival under stress and disturbance. However, quantitative understanding of these processes remains limited. Here we propose a framework where we connect commonly measured carbon cycle components (eddy covariance fluxes of canopy CO2 exchange, soil CO2 efflux, and allometry-based biomass and net primary production) by a simple mass balance model to derive ecosystem-level NSC dynamics (NSCi), C translocation (dC(i)), and the biomass production efficiency (BPEi) in above- and belowground plant (i = agp and bgp) compartments. We applied this framework to two long-term monitored loblolly pine (Pinus taeda) plantations of different ages in North Carolina and characterized the variations of NSC and allocation in years under normal and drought conditions. The results indicated that the young stand did not have net NSC flux at the annual scale, whereas the mature stand stored a near-constant proportion of new assimilates as NSC every year under normal conditions, which was comparable in magnitude to new structural growth. Roots consumed NSC in drought and stored a significant amount of NSC post drought. The above- and belowground dC(i) and BPEi varied more from year to year in the young stand and approached a relatively stable pattern in the mature stand. The belowground BPEbgp differed the most between the young and mature stands and was most responsive to drought. With the internal C dynamics quantified, this framework may also improve biomass production estimation, which reveals the variations resulting from droughts. Overall, these quantified ecosystem-scale dynamics were consistent with existing evidence from tree-based manipulative experiments and measurements and demonstrated that combining the continuous fluxes as proposed here can provide additional information about plant internal C dynamics. Given that it is based on broadly available flux data, the proposed framework is promising to improve the allocation algorithms in ecosystem C cycle models and offers new insights into observed variability in soil-plant-climate interactions.
dc.language.isoen
dc.publisherEcological Society of America
dc.subject.enflux partitioning
dc.subject.enmass balance
dc.subject.ennonstructural carbon
dc.subject.enpine plantation
dc.subject.enplant carbon allocation
dc.title.enBeyond carbon flux partitioning: Carbon allocation and nonstructural carbon dynamics inferred from continuous fluxes
dc.typeArticle de revue
dc.identifier.doi10.1002/eap.2655
dc.subject.halSciences de l'environnement
bordeaux.journalEcological Applications
bordeaux.page1-18
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-03745343
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03745343v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecological%20Applications&rft.date=2022&rft.spage=1-18&rft.epage=1-18&rft.eissn=1051-0761&rft.issn=1051-0761&rft.au=MIAO,%20Guofang&NOORMETS,%20Asko&GAVAZZI,%20Michael&MITRA,%20Bhaskar&DOMEC,%20Jean%E2%80%90christophe&rft.genre=article


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