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@ARTICLE{Siebers:864948,
author = {Siebers, Nina and Kruse, Jens},
title = {{S}hort-term impacts of forest clear-cut on soil structure
and consequences for organic matter composition and nutrient
speciation: {A} case study},
journal = {PLOS ONE},
volume = {14},
number = {8},
issn = {1932-6203},
address = {San Francisco, California, US},
publisher = {PLOS},
reportid = {FZJ-2019-04540},
pages = {e0220476 -},
year = {2019},
abstract = {Clear-cuts of forests severely affect soil structure and
thus soil organic matter (SOM) and nutrient cycling dynamics
therein, though with yet unknown consequences for SOM
composition as well as phosphorus (P) and sulfur (S)
chemical form within the soil microaggregate size fraction.
To determine the effects of conventional clear-cutting on
soil chemistry in a Cambisol of the Wüstebach Forest
(northwestern Germany), we sampled the mineral A- and
B-horizons prior to clear-cut as well as 10 and 24 month
thereafter. We measured the SOM composition of soil
microaggregates using pyrolysis field ionization mass
spectrometry (Py-FIMS), as well as P and S chemical form and
speciation using wet-chemical extractions and X-ray
absorption near edge structure (XANES) spectroscopy. We
found that clear-cut led to an increase of the
microaggregate size fraction up to $6\%$ due to break-down
of macroaggregates and initially significantly increased
total elemental concentrations (C, N, P, S) due to the
introduction of slash-residues. The SOM of slash-residues
consisted to a substantial amount of sterols and was
generally found to be of low thermal stability and probably
did not contribute to aggregate stability. Deterioration of
the aggregate structure probably led to an exposure of
originally inaccessible sites within aggregates to the
attack by soil microorganisms and thus to an increased P and
S turnover as reflected in a significantly reduction of
available P proportions (4 to $7\%)$ and a reduction of the
most reduced S forms $(5\%).$ A probable increased microbial
activity and contribution to SOM after clear-cut is also
reflected in the significantly increasing hexose:pentose
ratio by 0.25 between 10 and 24 month after clear-cut,
significantly increasing the general thermal stability of
SOM in the microaggregate size fraction and believed to
contribute to aggregate stability. This indicated that a
first deterioration of the aggregate structure after
clear-cut might in the long-term be remediated with time.},
cin = {IBG-3},
ddc = {610},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255)},
pid = {G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31369652},
UT = {WOS:000484987900055},
doi = {10.1371/journal.pone.0220476},
url = {https://juser.fz-juelich.de/record/864948},
}