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@ARTICLE{Mayr:864343,
      author       = {Mayr, Christoph and Smith, Rebecca E. and García, M.
                      Luján and Massaferro, Julieta and Lücke, Andreas and
                      Dubois, Nathalie and Maidana, Nora I. and Meier, Wolfgang
                      J.-H. and Wissel, Holger and Zolitschka, Bernd},
      title        = {{H}istorical eruptions of {L}autaro {V}olcano and their
                      impacts on lacustrine ecosystems in southern {A}rgentina},
      journal      = {Journal of paleolimnology},
      volume       = {62},
      number       = {2},
      issn         = {1573-0417},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {FZJ-2019-04139},
      pages        = {205 - 221},
      year         = {2019},
      abstract     = {Lacustrine sediment sequences were obtained from Lagunas
                      Verde and Gemelas Este, two small lakes located east of the
                      southern Patagonian Ice Field and close to the village of El
                      Chaltén, in Argentinian Patagonia. Four tephra layers were
                      identified in each of the short sediment sequences and
                      characterised using individual glass-shard tephra chemistry
                      to determine provenance. Bulk sediment geochemistry and
                      diatom assemblages were analysed to understand the impact of
                      the tephra deposits on the lake ecosystems. Age-depth models
                      for the cores were established by 137Cs and 210Pb dating.
                      Tephra deposits in Laguna Gemelas Este were dated to AD
                      1986–1998, 1943–1968, 1927–1955, and 1849–1892, and
                      the tephra deposits in Laguna Verde were dated to AD
                      1940–1970, 1888–1934, 1871–1920, and 1536–1669, the
                      latter interval determined by extrapolation. All tephras had
                      similar geochemical composition and originated from
                      volcanoes in the northern Austral Volcanic Zone. Tephra
                      units were attributed to known historical eruptions and all
                      but one, most likely, were from Lautaro Volcano (49°01′S;
                      73°33′W). The age of the youngest tephra (AD 1986–1998)
                      from Laguna Gemelas Este points to Viedma Volcano
                      (49°22′S; 73°19′W) as a possible source. Volcanic
                      eruptions had a larger impact on Laguna Verde than on Laguna
                      Gemelas Este, as expressed by changes in δ15N values and
                      diatom communities during tephra deposition. These shifts
                      are explained by perturbations of the nitrogen cycle in the
                      lake, associated with shifts in lacustrine primary
                      production. Primary producers may have been affected by
                      increased water turbidity caused by the ash fall, and
                      consequently, used less nitrogen. Diatom assemblages in
                      Laguna Verde showed marked reductions in numbers of
                      planktonic/tychoplanktonic taxa, in favour of
                      epiphytic/benthic diatom taxa, when tephra was deposited.
                      This contrasts with Laguna Gemelas Este, in which
                      epiphytic/benthic diatom species were generally more
                      abundant and decreases in abundances of
                      planktonic/tychoplanktonic taxa were not as strongly linked
                      to tephra layers as in Laguna Verde. At Laguna Gemelas Este,
                      flatter relief, greater fetch and/or drier climate may have
                      contributed to generally less ecosystem variability,
                      resulting in seemingly less environmental response to
                      volcanic eruptions than in Laguna Verde.},
      cin          = {IBG-3},
      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:000474473800007},
      doi          = {10.1007/s10933-019-00088-y},
      url          = {https://juser.fz-juelich.de/record/864343},
}