A new method to study simultaneous methane oxidation and methane production in soils

Citation
Bl. Andersen et al., A new method to study simultaneous methane oxidation and methane production in soils, GLOBAL BIOG, 12(4), 1998, pp. 587-594
Citations number
18
Categorie Soggetti
Earth Sciences
Journal title
GLOBAL BIOGEOCHEMICAL CYCLES
ISSN journal
08866236 → ACNP
Volume
12
Issue
4
Year of publication
1998
Pages
587 - 594
Database
ISI
SICI code
0886-6236(199812)12:4<587:ANMTSS>2.0.ZU;2-B
Abstract
Results of laboratory experiments show that C-14-labeled methane added to s oil was consumed faster than atmospheric C-12 methane. This implies a sourc e of methane, presumably through methanogenesis, in a soil that is a net co nsumer of atmospheric methane. The soil was well-drained forest soil from I spra, Italy. An undisturbed sample was taken with a steel corer and incubat ed under oxic conditions in a jar. Headspace samples were taken at time int ervals and analyzed for total methane by gas chromatography and analyzed fo r C-14 methane by liquid scintillation counting. Fluxes calculated from the decreasing headspace mixing ratios were, for example, -6.5 and -7.1 mu mol m(-2) hr(-1) for C-12 methane and C-14 methane, respectively. A simple mod el is considered which reproduces reasonably well the observed mixing ratio s as function of time.