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Abstract
Measurements of resource capture by individuals, species, or functional groups coexisting in field stands improve our ability to investigate the ecophysiological basis of plant competition. But methodological and technical difficulties have limited the use of such measurements. Carbon capture, in particular, is difficult to asses in heterogeneous, dense field stands. Here we present a new approach to measure in situ daily gross carbon gain of individuals. [ver mas...]
dc.contributor.authorLattanzi, Fernando Alfredo
dc.contributor.authorBerone, German Dario
dc.contributor.authorFeneis, Wolfgang
dc.contributor.authorSchnyder, Hans
dc.date.accessioned2019-03-15T15:07:33Z
dc.date.available2019-03-15T15:07:33Z
dc.date.issued2012-01
dc.identifier.issn0012-9658
dc.identifier.issn1939-9170
dc.identifier.otherhttps://doi.org/10.1890/11-1166.1
dc.identifier.urihttps://esajournals.onlinelibrary.wiley.com/doi/10.1890/11-1166.1
dc.identifier.urihttp://hdl.handle.net/20.500.12123/4625
dc.description.abstractMeasurements of resource capture by individuals, species, or functional groups coexisting in field stands improve our ability to investigate the ecophysiological basis of plant competition. But methodological and technical difficulties have limited the use of such measurements. Carbon capture, in particular, is difficult to asses in heterogeneous, dense field stands. Here we present a new approach to measure in situ daily gross carbon gain of individuals. It is based on measuring the 13C content of shoots after a few hours of continuous labeling of all assimilated CO2. The technique is simple and has few assumptions. A new, fully mobile facility was developed, capable of providing a labeling environment with a CO2 concentration close to atmospheric air and known, constant 13C‐enrichment, while maintaining temperature and relative humidity within ambient values. This facility was used in seminatural grasslands of Germany and Argentina to explore the relationship between size and carbon gain of individuals of coexisting species growing in contrasting hierarchical positions, and to analyze the carbon gain of functional groups. In general, carbon gain per unit shoot mass increased with increasing size among small individuals, but it became independent of size among the largest ones. In consequence, competition appeared to be size asymmetric between subordinate individuals but size symmetric between dominant individuals. When comparing functional groups, the carbon gain per unit shoot mass of rosette dicots vs. grasses reflected not their relative contribution to stand biomass, but their hierarchical position: irrespectively of mass or growth form, being taller than neighbors was most important in determining carbon gain per unit shoot mass. We believe these results show that in situ measurements of carbon gain can provide valuable insight in field studies of plant competition.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherEcological Society of Americaes_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceEcology 93 (1) : 169-179 (January 2012)es_AR
dc.subjectCarbonoes_AR
dc.subjectCarboneng
dc.subjectFotosíntesises_AR
dc.subjectPhotosynthesiseng
dc.subjectCompetencia Biológicaes_AR
dc.subjectBiological Competitioneng
dc.subjectCompetición Vegetales_AR
dc.subjectPlant Competitioneng
dc.subject.otherCaptura de Carbonoes_AR
dc.subject.otherAsimilación del Carbonoes_AR
dc.title13C‐labeling shows the effect of hierarchy on the carbon gain of individuals and functional groups in dense field standses_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.origenEEA Rafaelaes_AR
dc.description.filFil: Lattanzi, Fernando Alfredo. Technische Universität München. Lehrstuhl für Grünlandlehre; Alemaniaes_AR
dc.description.filFil: Berone, German Dario. Technische Universität München. Lehrstuhl für Grünlandlehre; Alemania. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentinaes_AR
dc.description.filFil: Feneis, Wolfgang. Technische Universität München. Lehrstuhl für Grünlandlehre; Alemaniaes_AR
dc.description.filFil: Schnyder, Hans. Technische Universität München. Lehrstuhl für Grünlandlehre; Alemaniaes_AR
dc.subtypecientifico


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