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Krüger, Inken ; Schulz, Christoph ; Borken, Werner:
Stocks and dynamics of soil organic carbon and coarse woody debris in three managed and unmanaged termperate forests.
In: European Journal of Forest Research.
Bd. 136
(2017)
Heft 1
.
- S. 123-137.
ISSN 1612-4677
DOI: https://doi.org/10.1007/s10342-016-1013-4
Abstract
The effect of forest conservation on the organic carbon (C) stock of temperate forest soils is hardly investigated. Coarse woody debris (CWD) represents an important C reservoir in unmanaged forests and potential source of C input to soils. Here, we compared aboveground CWD and soil C stocks at the stand level of threeunmanaged and three adjacent managed forests in differentgeological and climatic regions of Bavaria, Germany. CWD accumulated over 40–100 years and yielded C stocks of 11 Mg C ha-1 in the unmanaged spruce forest and 23and 30 Mg C ha-1 in the two unmanaged beech–oak forests.C stocks of the organic layer were smaller in the beech–oak forests (8 and 19 Mg C ha-1) and greater in the spruce forest (36 Mg C ha-1) than the C stock of CWD.Elevated aboveground CWD stocks did not coincide with greater C stocks in the organic layers and the mineral soils of the unmanaged forests. However, radiocarbon signatures of the Oe and Oa horizons differed among unmanaged and managed beech–oak forests. We attributed these differencesto partly faster turnover of organic C, stimulated by greater CWD input in the unmanaged forest. Alternatively, the slower turnover of organic C in the managed forestsresulted from lower litter quality following thinning or different tree species composition. Radiocarbon signatures of water-extractable dissolved organic carbon (DOC) from the top mineral soils point to CWD as potent DOC source. Our results suggest that 40–100 years of forest protection is too short to generate significant changes in C stocks andradiocarbon signatures of forest soils at the stand level.
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| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | BAYCEER134515 |
| Institutionen der Universität: | Forschungseinrichtungen Forschungseinrichtungen > Forschungszentren Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik |
| Eingestellt am: | 09 Jan 2018 08:25 |
| Letzte Änderung: | 09 Jan 2018 08:25 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/41213 |