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| Titel |
Carbon stocks and soil sequestration rates of tropical riverine wetlands |
| VerfasserIn |
M. F. Adame, N. S. Santini, C. Tovilla, A. Vázquez-Lule, L. Castro, M. Guevara |
| 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 ; 12, no. 12 ; Nr. 12, no. 12 (2015-06-23), S.3805-3818 |
| Datensatznummer |
250117995
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| Publikation (Nr.) |
 copernicus.org/bg-12-3805-2015.pdf |
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| Zusammenfassung |
| Riverine wetlands are created and transformed by geomorphological processes
that determine their vegetation composition, primary production and soil
accretion, all of which are likely to influence C stocks. Here, we compared
ecosystem C stocks (trees, soil and downed wood) and soil N stocks of
different types of riverine wetlands (marsh, peat swamp forest and
mangroves) whose distribution spans from an environment dominated by river
forces to an estuarine environment dominated by coastal processes. We also
estimated soil C sequestration rates of mangroves on the basis of soil C
accumulation. We predicted that C stocks in mangroves and peat swamps would
be larger than marshes, and that C, N stocks and C sequestration rates would
be larger in the upper compared to the lower estuary. Mean C stocks in
mangroves and peat swamps (784.5 ± 73.5 and 722.2 ± 63.6 MgC ha−1, respectively) were higher than those of marshes
(336.5 ± 38.3 MgC ha−1). Soil C and N stocks of mangroves were
highest in the upper estuary and decreased towards the lower estuary. C
stock variability within mangroves was much lower in the upper estuary
(range 744–912 MgC ha−1) compared to the intermediate and lower estuary
(range 537–1115 MgC ha−1) probably as a result of a highly dynamic
coastline. Soil C sequestration values were 1.3 ± 0.2 MgC ha−1 yr−1 and were similar across sites. Estimations of C stocks
within large areas need to include spatial variability related to vegetation
composition and geomorphological setting to accurately reflect variability
within riverine wetlands. |
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