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Stocks and dynamics of soil organic carbon and coarse woody debris in three managed and unmanaged termperate forests

Title data

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. Vol. 136 (2017) Issue 1 . - pp. 123-137.
ISSN 1612-4677
DOI: https://doi.org/10.1007/s10342-016-1013-4

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER134515
Institutions of the University: Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 09 Jan 2018 08:25
Last Modified: 09 Jan 2018 08:25
URI: https://eref.uni-bayreuth.de/id/eprint/41213