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<identifier>oai:HAL:hal-01032042v1</identifier>
<datestamp>2018-01-11</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>Use of Δ13C for soil CO2 efflux partitioning in a beech temperate forest and a rain tropical forest</title>
<creator>Longdoz, Bernard</creator>
<creator>Epron, Daniel</creator>
<creator>Ngao, Jérome</creator>
<creator>Ponton, Stéphane</creator>
<creator>Bonal, Damien</creator>
<creator>Le Dantec, Valérie</creator>
<contributor>Ecologie et Ecophysiologie Forestières (EEF) ; Institut National de la Recherche Agronomique (INRA) - Université de Lorraine (UL)</contributor>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Ecole Nationale du Génie Rural, des Eaux et des Forêts (ENGREF) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Centre d'études spatiales de la biosphère (CESBIO) ; Université Paul Sabatier - Toulouse 3 (UPS) - Institut national des sciences de l'Univers (INSU - CNRS) - Observatoire Midi-Pyrénées (OMP) - Centre National d'Etudes Spatiales (CNES) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<source>AGU Fall Meeting</source>
<coverage>San Francisco, United States</coverage>
<identifier>hal-01032042</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01032042</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01032042</source>
<source>AGU Fall Meeting, Dec 2005, San Francisco, United States. n.p</source>
<language>en</language>
<subject lang=fr>HETRE COMMUN</subject>
<subject>[SDV.SA] Life Sciences [q-bio]/Agricultural sciences</subject>
<type>info:eu-repo/semantics/conferenceObject</type>
<type>Conference papers</type>
<description lang=en>Carbon isotopic signature has been measured at the different stages of the soil CO2 efflux production in trenched and control plots to improve the knowledge about the physical and biochemical processes of the soil respiration. All the measurements of d13C have been performed using a mass-spectrometer. We have compared the isotopic signatures of the CO2 going out of the soil, the CO2 of the soil atmosphere, the organic carbon in the material that could be considered as the main soil respiration sources (live and dead roots, soil organic matter, aerial litter) and the CO2 produced by these sources in incubation jars. The aims of this study were to evaluate the possibilities to combine these different data sets to estimate the partitioning of soil respiration between its autotrophic and heterotrophic components, and to get more insight into potential fractionation during biochemical or diffusion processes. Measurements were conducted in a beech forest located at Hesse in the North East of France (site equipped with a flux tower and belonging to the CarboEurope network) and in a neotropical primary rainforest located at Paracou (French Guiana). Preliminary results show first a very tenuous difference between CO2 isotopic signatures of efflux coming from the trenched and control plots and, secondly, d13C significant divergences between bulk organic material and CO2 produced in the corresponding incubation jars. Our ability to use this kind of data for partitioning soil respiration into its main components will be discussed.</description>
<date>2005-12-05</date>
</dc>
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