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@ARTICLE{Bluszcz:5003,
      author       = {Bluszcz, P. and Lücke, A. and Ohlendorf, C. and
                      Zolitschka, B.},
      title        = {{S}easonal dynamics of stable isotopes and element ratios
                      in authigenic calcites during their precipitation and
                      dissolution, {S}acrower {S}ee (northeastern {G}ermany)},
      journal      = {Journal of limnology},
      volume       = {68},
      issn         = {1129-5767},
      address      = {Verbania},
      publisher    = {Ist.},
      reportid     = {PreJuSER-5003},
      pages        = {257 - 273},
      year         = {2009},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The seasonal evolution of chemical and physical water
                      properties as well as particle fluxes was monitored in
                      Sacrower See (northern Germany) during two consecutive years
                      (Oct 2003 - Oct 2005). Additonally, we measured delta O-18
                      and delta C-13 as well as Sr:Ca and Mg:Ca ratios of
                      authigenic calcites that were collected in sequencing
                      sediment traps in order to disentangle environmental and
                      climatic factors controlling these parameters. In
                      particular, our aim was to find out if element ratios and
                      the isotopic composition of calcites reflect changes, in
                      water and air temperatures. Lake water is highly enriched in
                      O-18 (-1.3 to $-2.5\%.$ VSMOW) with an evaporative increase
                      of 0.6 parts per thousand during summer. Values are 5-6
                      parts per thousand more positive than groundwater values and
                      4-5 parts per thousand more positive than long-term weighted
                      annual means of precipitation. During spring and summer,
                      high amounts of dissolved phosphate cause eutrophic
                      conditions and calcite precipitation in isotopic
                      disequilibrium. Measured values are depleted in 180 by 2 to
                      10 parts per thousand compared to calculated equilibrium
                      values. Resuspension and partial dissolution of calcite in
                      the water column contribute to this isotopic divergence in
                      summer and autumn as delta O-18(ca) and delta C-13 values
                      increased in the hypolimnion during this time. Mg:Ca and
                      Sr:Ca ratios are altered by dissolution as well. In the
                      hypolimnion these ratios were higher than in the epilimnion.
                      Another reason for the huge deviation between measured and
                      theoretical delta O-18(ca) values during summer is the
                      occurrence of large amounts of Phacotus lenticularis in the
                      carbonate - fraction. High amounts of Phacotus lead to more
                      negative delta O-18(ca) and more positive delta C-13 values.
                      Several characteristics of delta O-18(ca) and delta C-13 are
                      also reflected by Mg:Ca and Sr:Ca ratios and isotopic
                      composition of oxygen and carbon were influenced by the
                      onset and stability of stratification. Especially the
                      earlier onset of stratification it? 2005 caused higher
                      sediment fluxes and more positive carbon and oxygen isotope
                      values of bioinduced carbonates compared to 2004.},
      keywords     = {J (WoSType)},
      cin          = {ICG-4},
      ddc          = {570},
      cid          = {I:(DE-Juel1)VDB793},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Limnology},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000268778300010},
      doi          = {10.3274/JL09-68-2-10},
      url          = {https://juser.fz-juelich.de/record/5003},
}