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| Titel |
Temperature sensitivity of organic-matter decay in tidal marshes |
| VerfasserIn |
M. L. Kirwan, G. R. Guntenspergen, J. A. Langley |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 17 ; Nr. 11, no. 17 (2014-09-11), S.4801-4808 |
| Datensatznummer |
250117584
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| Publikation (Nr.) |
 copernicus.org/bg-11-4801-2014.pdf |
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| Zusammenfassung |
| Approximately half of marine carbon sequestration takes place in coastal
wetlands, including tidal marshes, where organic matter contributes to soil
elevation and ecosystem persistence in the face of sea-level rise. The
long-term viability of marshes and their carbon pools depends, in part, on
how the balance between productivity and decay responds to climate change.
Here, we report the sensitivity of labile soil organic-matter decay in tidal
marshes to seasonal and latitudinal variations in temperature measured over a
3-year period. We find a moderate increase in decay rate at warmer
temperatures (3–6% per °C, Q10 = 1.3–1.5). Despite the
profound differences between microbial metabolism in wetlands and uplands,
our results indicate a strong conservation of temperature sensitivity.
Moreover, simple comparisons with organic-matter production suggest that
elevated atmospheric CO2 and warmer temperatures will accelerate carbon
accumulation in marsh soils, and potentially enhance their ability to survive
sea-level rise. |
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