Tracing the transfer of recently assimilated carbon into root and soil respiration after in situ 13CO2 pulse labelling of trees.

C Plain (1) , D Gerant (1) , P Maillard , M Danoura , Y Dong , Bernhard Zeller , P Priault (1) , F Parent , D Epron (1)

1 EEF - Ecologie et Ecophysiologie Forestières [devient SILVA en 2018]

The isotope compositions of trunk and soil CO 2 effluxes were continuously recorded on Fagus sylvatica 8-10 m trees by tuneable diode laser absorption spectrometer (TDLAS) during a 2-months chase period following a september short-term crown labelling enabling accurate assessments of time lags between photosynthetic assimilation by the labelled crown and CO 2 release in the trunk and the soil, as well as precise determinations of half-life of labelled carbon in respiratory effluxes.

Domaines: Sciences du Vivant [q-bio]; Biologie végétale; Ecologie, Environnement

C Plain, D Gerant, P Maillard, M Danoura, Y Dong, et al.. Tracing the transfer of recently assimilated carbon into root and soil respiration after in situ 13CO2 pulse labelling of trees.. Mini symposium on the use of stable isotopes in tree physiology and forest ecology., Jul 2009, Nancy, France. ⟨hal-03078883⟩