Journal
SOIL BIOLOGY & BIOCHEMISTRY
Volume 42, Issue 11, Pages 2034-2036Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2010.07.025
Keywords
Decomposition; Soil carbon; Temperature sensitivity; Stable carbon isotopes; Carbon modeling
Categories
Funding
- NSF [DEB0842315]
- Division Of Environmental Biology
- Direct For Biological Sciences [0842315] Funding Source: National Science Foundation
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Parallel incubation at different temperatures combined with (13)CO(2) efflux has been used to distinguish the temperature sensitivity of labile soil carbon (young soil carbon derived from newly-introduced vegetation) from that of resistant soil carbon (old, native vegetation-derived soil carbon). But we believe that this approach to assessing relative temperature sensitivities is confounded by differential rates of depletion of labile and resistant soil carbon at different temperatures. Here we employ a simple decomposition model to demonstrate potential pitfalls in interpreting (13)CO(2) efflux data that inevitably, and potentially erroneously, lead to the conclusion that decomposition of resistant soil carbon pools is more temperature sensitive than labile pools. We conclude by offering a new approach for interpreting these data that eliminates this potential bias. (C) 2010 Elsevier Ltd. All rights reserved.
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