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| Titel |
Technical Note: Linking climate change and downed woody debris decomposition across forests of the eastern United States |
| VerfasserIn |
M. B. Russell, C. W. Woodall, A. W. D'Amato, S. Fraver, J. B. Bradford |
| 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. 22 ; Nr. 11, no. 22 (2014-11-26), S.6417-6425 |
| Datensatznummer |
250117692
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| Publikation (Nr.) |
 copernicus.org/bg-11-6417-2014.pdf |
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| Zusammenfassung |
| Forest ecosystems play a critical role in mitigating greenhouse gas
emissions. Forest carbon (C) is stored through photosynthesis and released
via decomposition and combustion. Relative to C fixation in biomass, much
less is known about C depletion through decomposition of woody debris,
particularly under a changing climate. It is assumed that the increased
temperatures and longer growing seasons associated with projected climate
change will increase the decomposition rates (i.e., more rapid C cycling) of
downed woody debris (DWD); however, the magnitude of this increase has not
been previously addressed. Using DWD measurements collected from a national
forest inventory of the eastern United States, we show that the residence
time of DWD may decrease (i.e., more rapid decomposition) by as much as
13% over the next 200 years, depending on various future climate change
scenarios and forest types. Although existing dynamic global vegetation
models account for the decomposition process, they typically do not include
the effect of a changing climate on DWD decomposition rates. We expect that
an increased understanding of decomposition rates, as presented in this
current work, will be needed to adequately quantify the fate of woody
detritus in future forests. Furthermore, we hope these results will lead to
improved models that incorporate climate change scenarios for depicting
future dead wood dynamics in addition to a traditional emphasis on live-tree
demographics. |
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