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@ARTICLE{Bechtel:884102,
      author       = {Bechtel, Achim and Widera, Marek and Lücke, Andreas and
                      Groß, Doris and Woszczyk, Michał},
      title        = {{P}etrological and geochemical characteristics of xylites
                      and associated lipids from the {F}irst {L}usatian lignite
                      seam ({K}onin {B}asin, {P}oland): {I}mplications for floral
                      sources, decomposition and environmental conditions},
      journal      = {Organic geochemistry},
      volume       = {147},
      issn         = {0146-6380},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-03097},
      pages        = {104052 -},
      year         = {2020},
      abstract     = {Single pieces of fossil wood fragments (xylites) were
                      collected from the middle Miocene First Lusatian lignite
                      seam at the Adamów, Jóźwin IIB and Tomisławice opencast
                      mines and are characterized by maceral variety, cellulose
                      contents and their molecular and isotopic composition.
                      Biomarker composition of xylites and δ13C of their total
                      organic matter, lipids and cellulose are used to provide
                      insights into woody plant community and the effects of wood
                      decomposition.The investigated xylites represent fragments
                      of fossil wood from conifers, most likely species of
                      Cupressaceae, indicated by terpenoid biomarkers
                      characteristic for conifers and by the δ13C values of the
                      extracted cellulose. This conclusion is confirmed by
                      paleobotanical data highlighting Taxodium and Nyssa as the
                      main elements of the wet forest swamps. Due to the wet swamp
                      habitat and the higher-decay resistance exclusively wood
                      fragments of conifers are found in the lignite seam. Minor
                      abundances of angiosperm-derived triterpenoids in the
                      xylites are explained by impurities from inherent detritic
                      lignite.The xylites are characterized by minor to moderate
                      extents of gelification, but elevated to high cellulose
                      decomposition. The relationship between δ13C values of
                      xylites and their cellulose contents reflects wood
                      decomposition removing preferentially the 13C-enriched
                      compounds, but decomposition did not affect the δ13C of
                      cellulose. Despite of similar δ13C of xylites and detritic
                      lignite, differences in isotopic composition of hopanoids
                      argue for slightly different microbial communities involved
                      in the decomposition of the respective OM. Thus, we conclude
                      that wood decomposition proceeded in a freshwater
                      environment under acidic conditions by fungi and
                      bacteria.Variations in water availability during growth
                      periods of the conifers are suggested as the most probable
                      cause for the observed minor variations in isotopic
                      composition of plant lipids. The positive relationship found
                      between δ2H and δ13C of plant biomarkers, and cellulose of
                      xylites can be explained by the ability of vascular plants
                      to minimize evapotranspiration during dryer phases resulting
                      in plant OM enriched in 13C and 2H. The significant
                      differences in δ2H between diterpenoids of different
                      structural types and n-alkanes are most likely caused by
                      differences in isotopic fractionation during lipid
                      biosynthesis.},
      cin          = {IBG-3},
      ddc          = {540},
      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:000554921700004},
      doi          = {10.1016/j.orggeochem.2020.104052},
      url          = {https://juser.fz-juelich.de/record/884102},
}