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@ARTICLE{Enters:57140,
      author       = {Enters, D. and Lücke, A. and Zolitschka, B.},
      title        = {{E}ffects of land-use change on deposition and composition
                      of organic matter in {F}rickenhauser {S}ee, northern
                      {B}avaria, {G}ermany},
      journal      = {The science of the total environment},
      volume       = {369},
      issn         = {0048-9697},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {PreJuSER-57140},
      year         = {2006},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Characterization of bulk organic matter (OM) from
                      lacustrine sediments of Frickenhauser See (northern Bavaria,
                      Germany) reveals considerable variation during the last two
                      millennia. Atomic C/N ratios and total organic carbon (TOC)
                      content are positively correlated with arboreal pollen
                      percentages which are used as an indicator of land-use
                      intensity. Despite possible alterations of OM during early
                      diagenesis, differences between three major lithological
                      units are large enough to be interpreted as human impact on
                      the sedimentation of OM in the lake. Sediments deposited
                      prior to deforestation in the catchment area (unit C) are
                      characterized by mean C/N ratios of 14.5, indicating a mixed
                      composition of organic matter derived from lacustrine and
                      terrestrial sources (forest litter). During a period of
                      intensive soil erosion (ca. 1000 AD until 1870 AD; unit B),
                      low C/N ratios of around 7.7 suggest that the relative
                      proportion of forest litter decreased in favour of the
                      lacustrine component and soil OM. Terrestrial plant detritus
                      is only transported into the lake through numerous turbidite
                      events. Deforestation and agriculture also coincide with a
                      decreasing TOC content from an average value of $10.7\%$ to
                      $1.5\%.$ This decrease is explained through a dilution
                      effect due to the high input of minerogenic matter. Stable
                      carbon isotopes indicate eutrophication of the lake due to
                      the mobilization of nutrients through soil erosion. Starting
                      around 1870 AD, organic-rich sapropelic sediments are
                      deposited (unit A). A decline of turbidite events and
                      increased wind shelter from trees due to reduced land-use
                      intensity led to meromictic conditions. Consequently,
                      negative excursions in the delta13C isotope record at the
                      onset of unit A probably reflect methanogenesis under
                      permanently anoxic conditions.},
      keywords     = {Carbon: analysis / Conservation of Natural Resources /
                      Environmental Monitoring / Fresh Water: analysis / Geologic
                      Sediments / Germany / Nitrogen: analysis / Pollen / Sulfur:
                      analysis / Trees / Carbon (NLM Chemicals) / Sulfur (NLM
                      Chemicals) / Nitrogen (NLM Chemicals) / J (WoSType)},
      cin          = {ICG-V},
      ddc          = {333.7},
      cid          = {I:(DE-Juel1)VDB51},
      pnm          = {Geosysteme - Erde im Wandel},
      pid          = {G:(DE-Juel1)FUEK405},
      shelfmark    = {Environmental Sciences},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:16842838},
      UT           = {WOS:000240892700018},
      doi          = {10.1016/j.scitotenv.2006.05.020},
      url          = {https://juser.fz-juelich.de/record/57140},
}