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| Titel |
Particulate organic carbon (POC) in relation to other pore water carbon fractions in drained and rewetted fens in Southern Germany |
| VerfasserIn |
S. Fiedler, B. S. Höll, A. Freibauer, K. Stahr, M. Drösler, M. Schloter, H. F. Jungkunst |
| 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 ; 5, no. 6 ; Nr. 5, no. 6 (2008-12-03), S.1615-1623 |
| Datensatznummer |
250002927
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| Publikation (Nr.) |
 copernicus.org/bg-5-1615-2008.pdf |
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| Zusammenfassung |
Numerous studies have dealt with carbon (C) contents in Histosols, but
there are no studies quantifying the relative importance of the individual C
components in pore waters. For this study, measurements were taken of all
the carbon components (particulate organic carbon, POC; dissolved organic
carbon, DOC; dissolved inorganic carbon, DIC; dissolved methane, CH4)
in the soil pore water of calcareous fens under three different water
management regimes (re-wetted, deeply and moderately drained). Pore water
was collected weekly or biweekly (April 2004 to April 2006) at depths
between 10 and 150 cm.
The main results obtained were: (1) DIC (94–280 mg C l−1) was the main
C-component. (2) POC and DOC concentrations in the pore water
(14–125 mg C l−1 vs. 41–95 mg C l−1) were pari passu. (3) Dissolved CH4
was the smallest C component (0.005–0.9 mg C l−1). Interestingly,
about 30% of the POM particles were colonized by microbes indicating
that they are active in the internal C turnover. Certainly, both POC and DOC
fractions are essential components of the C budget of peatlands.
Furthermore, dissolved CO2 in all forms of DIC appears to be an
important part of peatland C-balance. |
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