Garnett, M.H., Hartley, I.P., Hopkins, D.W., Sommerkorn, M. and Wookey, P.A. (2009) A passive sampling method for radiocarbon analysis of soil respiration using molecular sieve. Soil Biology and Biochemistry, 41(7), pp. 1450-1456. (doi: 10.1016/j.soilbio.2009.03.024)
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Abstract
Radiocarbon analysis of soil CO2 can provide information on the age, source and turnover rate of soil organic C. We developed a new method for passively trapping respired CO2 on molecular sieve, allowing it to be returned to the laboratory and recovered for C isotope analysis. We tested the method on a soil at a grassland site, and using a synthetic soil created to provide a contrasting isotopic signature. As with other passive sampling techniques, a small amount of fractionation of the 13C isotope occurs during sampling, which we have quantified, otherwise the results show that the molecular sieve traps a sufficiently large and representative sample of CO2 for C isotope analysis. Since 14C results are routinely corrected for mass-dependent fractionation, our results show that passive sampling of soil respiration using molecular sieve offers a reliable method to collect soil-respired CO2 for 14C analysis.
| Item Type: | Articles |
|---|---|
| Keywords: | Soil respiration, CO2, radiocarbon, molecular sieve |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Garnett, Dr Mark |
| Authors: | Garnett, M.H., Hartley, I.P., Hopkins, D.W., Sommerkorn, M., and Wookey, P.A. |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences Q Science > QH Natural history > QH345 Biochemistry |
| College/School: | College of Science and Engineering > Scottish Universities Environmental Research Centre |
| Journal Name: | Soil Biology and Biochemistry |
| Journal Abbr.: | Soil biol. biochem. |
| Publisher: | Elsevier |
| ISSN: | 0038-0717 |
| ISSN (Online): | 1879-3428 |
| Published Online: | 16 April 2009 |
| Copyright Holders: | Copyright © 2009 Elsevier |
| First Published: | First published in Soil Biology and Biochemistry 41(7):1450-1456 |
| Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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