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@ARTICLE{Vuillemin:171922,
      author       = {Vuillemin, A. and Ariztegui, D. and Lücke, Andreas and
                      Mayr, C.},
      title        = {{P}aleoenvironmental conditions define current
                      sustainability of microbial populations in {L}aguna {P}otrok
                      {A}ike sediments, {A}rgentina},
      journal      = {Aquatic sciences},
      volume       = {76},
      number       = {1},
      issn         = {0036-7842},
      address      = {Basel},
      publisher    = {Springer},
      reportid     = {FZJ-2014-05478},
      pages        = {101-114},
      year         = {2014},
      abstract     = {Rainfall and geology of the catchment exert a dominant
                      control on the trophic state of endorheic basins. River
                      inflows and runoff provide nutrients, influencing primary
                      productivity in the water column. Through time,
                      paleoenvironmental conditions are recorded as variations
                      within the sedimentary organic fraction. Thereafter,
                      microbial populations settle and develop within sediments
                      and lead to degradation processes as long as they remain
                      active. However, their presence is generally not considered
                      in Quaternary studies. The present study is based on the
                      sedimentary record of the maar lake of Laguna Potrok Aike,
                      southern Patagonia. We investigate the relationship between
                      paleoenvironmental conditions and colonization of the
                      corresponding sediments by microbes. Microbiological and
                      geochemical analyses were combined to determine factors
                      allowing microbes to sustain their activity over time. The
                      study of Holocene sediments, containing dense and active
                      microbial communities, provided means to evaluate the
                      potential of microbial communities as agents of early
                      diagenesis. We show that phosphorus released during organic
                      matter degradation is essential for microbial growth. In
                      highly colonized sediments, microbial communities appear
                      capable of recycling the excreted ammonium, thus accounting
                      for nitrogen fractionation toward high values in bulk
                      sediment. Microbial activity in Laguna Potrok Aike still
                      persists in 30 ka old sediments. Thus, we proposed that
                      future lacustrine studies should include some microbial
                      indicators to assess their impact in diagenetic processes.},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {246 - Modelling and Monitoring Terrestrial Systems: Methods
                      and Technologies (POF2-246) / 255 - Terrestrial Systems:
                      From Observation to Prediction (POF3-255)},
      pid          = {G:(DE-HGF)POF2-246 / G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000329226100009},
      doi          = {10.1007/s00027-013-0317-4},
      url          = {https://juser.fz-juelich.de/record/171922},
}