% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Marcel:902933,
      author       = {Marcel, Lorenz and Hofmann, Diana and Steffen, Bernhard and
                      Fischer, Klaus and Thiele-Bruh, Sören},
      title        = {{T}he molecular composition of extractable soil microbial
                      compounds andtheir contribution to soil organic matter vary
                      with soil depth andtree species},
      journal      = {The science of the total environment},
      volume       = {781},
      issn         = {0048-9697},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2021-04686},
      pages        = {146732},
      year         = {2021},
      abstract     = {Recent findings on soil organic matter (SOM) revealed that
                      soil microorganisms are not only crucial for
                      SOMformationthrough plant litter degradation but soil
                      microbial biomass (SMB) may also directly contribute to
                      SOMand its composition. However, the role and interactions
                      of litter quality, microbial turnover and composition ofSMB
                      and SOM remain unclear. Hence, soil profiles (organic forest
                      floor and mineral soil layers) at a recultivatedand
                      afforested post-mining site were investigated for the
                      influence of litter quality from different tree
                      species(Fagus sylvatica, Pseudotsuga menziesii, Pinus nigra)
                      and soil depth – representing different degrees of
                      organicmatter (OM) turnover – on the molecular composition
                      of chloroform fumigation extracted SMB-derived compoundsin
                      comparison with easily extractable (non-fumigated)
                      SOM-derived compounds. The SMB extractswere analyzed for
                      microbial biomass carbon (MBC), nitrogen(MBN) and phosphorus
                      (MBP). Themolecular compositionof SMB and SOMcompoundswere
                      determined by electrospray ionization Fourier transformation
                      ion cyclotronresonance mass spectrometry (ESI-FT-ICR-MS)
                      complemented by the determination of ninemonosaccharides
                      representing microbial or plant origin.Van Krevelen diagrams
                      obtained from the ESI-FT-ICR mass spectra revealed the
                      substantial contribution ofmicrobial-derived compounds to
                      extractable SOMthat further increasedwith soil depth.
                      Analysis of the easily extractablemonosaccharidesimplied
                      $that>99\%were$ of microbial origin. Microbial sugars aswell
                      asMBC,MBNandMBP explained best depth-related variations of
                      extractable SMB compounds indicating that supply and
                      availabilityof C-rich OM drive these parameters.
                      Furthermore, the contribution of microbial sugar C to MBC
                      increasedwith depth, suggesting that recycling of
                      carbohydrates is an adaptation strategy of microorganisms in
                      C-limited environments. The supply of tree species-specific
                      substratesresulted in different chemical composition of SMB
                      with largest differences between deciduous and coniferous
                      stands and vice versa, microorganisms contributed to SOM
                      resulting in large similarity in the composition of SOM and
                      SMB.},
      cin          = {IBG-3},
      ddc          = {610},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000655621000005},
      doi          = {10.1016/j.scitotenv.2021.146732},
      url          = {https://juser.fz-juelich.de/record/902933},
}