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| Titel |
Updated estimates of carbon accumulation rates in coastal marsh sediments |
| VerfasserIn |
X. Ouyang, S. Y. Lee |
| 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. 18 ; Nr. 11, no. 18 (2014-09-19), S.5057-5071 |
| Datensatznummer |
250117602
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| Publikation (Nr.) |
 copernicus.org/bg-11-5057-2014.pdf |
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| Zusammenfassung |
| Studies on carbon stock in salt marsh sediments have increased since the
review by Chmura et al. (2003). However, uncertainties exist in estimating
global carbon storage in these vulnerable coastal habitats, thus hindering
the assessment of their importance. Combining direct data and indirect
estimation, this study compiled studies involving 143 sites across the
Southern and Northern hemispheres, and provides an updated estimate of the
global average carbon accumulation rate (CAR) at 244.7 g C m−2 yr−1
in salt marsh sediments. Based on region-specific CAR and estimates
of salt marsh area in various geographic regions between 40° S to
69.7° N, total CAR in global salt marsh sediments is estimated at
~10.2 Tg C yr−1. Latitude, tidal range and elevation
appear to be important drivers for CAR of salt marsh sediments, with
considerable variation among different biogeographic regions. The data
indicate that while the capacity for carbon sequestration by salt marsh
sediments ranked the first amongst coastal wetland and forested terrestrial
ecosystems, their carbon budget was the smallest due to their limited and
declining global areal extent. However, some uncertainties remain for our
global estimate owing to limited data availability. |
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