% 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{Baumann:864358,
      author       = {Baumann, Karen and Siebers, Meike and Kruse, Jens and
                      Eckhardt, Kai-Uwe and Hu, Yongfeng and Michalik, Dirk and
                      Siebers, Nina and Kar, Gourango and Karsten, Ulf and
                      Leinweber, Peter},
      title        = {{B}iological soil crusts as key player in biogeochemical
                      {P} cycling during pedogenesis of sandy substrate},
      journal      = {Geoderma},
      volume       = {338},
      issn         = {0016-7061},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2019-04154},
      pages        = {145 - 158},
      year         = {2019},
      abstract     = {Little is known about phosphorus (P) in biological soil
                      crusts (BSCs) and their role in biogeochemical P cycling.
                      The present study evaluated P in BSCs with an array of
                      methodological approaches including sequential P
                      fractionation, solution 31P nuclear magnetic resonance (NMR)
                      spectroscopy, synchrotron-based P K-edge X-ray absorption
                      near-edge structure (XANES) spectroscopy, elemental mapping
                      (μ-XRF) combined with μ-XANES and P-lipid quantification.
                      BSCs (light algal crusts) were collected at seven sites
                      along a sediment weathering gradient in north-eastern
                      Germany (based on feldspar weathering indices) from
                      non-weathered dune sands at the Baltic Sea coast to more
                      strongly weathered Weichselian glacio-fluvial sands near
                      Berlin. The total P (Pt) concentrations of BSCs ranged from
                      93 to 389 mg kg−1 and were not significantly
                      correlated with the change in feldspar weathering index.
                      While concentrations of stable P (H2SO4-extractable)
                      strongly decreased, labile P
                      (resin- + NaHCO3-extractable P) in BSCs increased with
                      increasing sediment weathering. Based on 31P NMR spectra, 20
                      to $62\%$ of NaOH-EDTA extracted P was orthophosphate
                      monoesters and 0 to $9\%$ was diesters. For BSCs, P K-edge
                      XANES showed that Ca-P species decreased with increasing
                      weathering. Heterogeneity of the BSCs was exemplarily shown
                      at the micrometre scale by element mapping μ-XRF and
                      μ-XANES, using four 10 × 10 μm spots of a vertical
                      cross-section within a coastal dune BSC. While only the
                      P-lipid class phosphatidic acid (PA) increased with
                      increasing weathering, analyses of BSC phospholipid fatty
                      acids (PLFAs) revealed decreasing contributions of
                      Gram-positive bacteria with increasing coastal sediment
                      weathering but different taxa were independent of any
                      investigated P parameter. Proportions of lipid-P varied
                      between 0.02 and $0.1\%$ of Pt, indicating a constant share
                      of living biomass in BSCs along the gradient. In conclusion,
                      this multi-method study of P speciation in BSCs showed that
                      these communities play a key role in the biogeochemical P
                      cycle, especially by transforming stable P into labile,
                      easily bioavailable P.},
      cin          = {IBG-3},
      ddc          = {910},
      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},
      UT           = {WOS:000457657000016},
      doi          = {10.1016/j.geoderma.2018.11.034},
      url          = {https://juser.fz-juelich.de/record/864358},
}