Publication Date:
2021-03-29
Description:
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 (rewetted,
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 mgC l−1) was the main C-component. (2) POC and
DOC concentrations in the pore water (14–125 mg Cl−1 vs.
41–95 mgC l−1) were pari passu. (3) Dissolved CH4 was the
smallest C component (0.005–0.9 mg Cl−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.
Keywords:
carbon; pore waters
;
551
Language:
English
Type:
article
,
publishedVersion
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