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@INPROCEEDINGS{Graf:1033847,
      author       = {Graf, Alexander and Hofer, Anna and Müller, Laura and
                      Schmidt, Marius and Leuchner, Michael and Ketzler, Gunnar
                      and Ney, Patrizia and Drüe, Clemens and Pütz, Thomas and
                      Vereecken, Harry},
      title        = {{S}pontaneous tree growth and carbon dynamics during the
                      first decade after removal of a coniferous monoculture at a
                      humid temperate forest site},
      reportid     = {FZJ-2024-06688},
      year         = {2024},
      abstract     = {In September 2013, 8.6 hectares of a 70-year old Norway
                      spruce (picea abies) monoculture were cleared in the newly
                      founded national park Eifel (Germany) and left to
                      spontaneous regrowth of the expected deciduous forest
                      matching the site’s climate and soil conditions. The site
                      is part of the 38.5 hectare experimental catchment
                      “Wüstebach” (50° 30’N, 6° 19’E, 595 to 630 m
                      a.s.l.), one of the core investigation sites of TERENO
                      (TERrestrial ENvironmental Observatories,
                      https://www.tereno.net). Most of the rest of the catchment
                      is still covered by the original spruce monoculture. Its
                      energy and matter exchange with the atmosphere, most notably
                      of CO2, is monitored by an ICOS associated eddy-covariance
                      station (DE-RuW) since 2010. In 2013 after the partial
                      deforestation, a second flux station was installed near the
                      centre of the clearcut. Due to an overpressure of game (boar
                      and deer) in the area, 2 hectares of the central clearcut
                      area are protected against grazing by a fence. CO2 budget
                      and albedo results from the first four growing periods after
                      the clearcut were presented by Ney et al. in 2019
                      (https://doi.org/10.1016/j.agrformet.2019.04.009). Here, we
                      will give an update covering the first ten growing periods
                      after deforestation (2014-2023). Most notably, regrowing
                      vegetation on the initially almost bare clearcut turned it
                      from a source back into a sink of atmospheric CO2 eight
                      years after the deforestation. We will give an overview on
                      how flux components (soil) respiration and gross primary
                      productivity, season length and peak fluxes contributed to
                      the difference between the spruce forest and the early and
                      recent stages of the regrowing forest. For the last eight
                      years, we recorded the species, height and partly the
                      diameter of all spontaneous regrowing trees in the
                      deforested area in a 10 m corridor both inside and outside
                      the fence. Regrowth was strongly dominated by rowan (sorbus
                      aucuparia, >1200 trees), a pioneer species propagated
                      through their berries by birds that was present with at
                      least one adult tree already before the deforestation beside
                      further trees in distant surroundings. The next two
                      important species were spruce and birch (betula pendula),
                      whose seeds are propagated by wind. Rowan and birch grew in
                      height approximately twice as fast as spruce. The presence
                      of the protective fence affected all species, especially
                      rowan, which grew more than twice as fast on the inside of
                      the fence.},
      month         = {Apr},
      date          = {2024-04-14},
      organization  = {EGU General Assembly 2024, Vienna
                       (Austria), 14 Apr 2024 - 19 Apr 2024},
      subtyp        = {After Call},
      cin          = {IBG-3},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217) / IDAS-GHG - Weiterentwicklung und Vergleich von
                      Methoden zur instrumentellen und analytischen
                      Komponentenzerlegung gemessener Treibhausgasflüsse
                      (01LN1313A)},
      pid          = {G:(DE-HGF)POF4-2173 / G:(BMBF)01LN1313A},
      typ          = {PUB:(DE-HGF)24},
      doi          = {10.5194/egusphere-egu24-9455},
      url          = {https://juser.fz-juelich.de/record/1033847},
}