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@ARTICLE{Herbst:820906,
      author       = {Herbst, M. and Tappe, W. and Kummer, S. and Vereecken, H.},
      title        = {{T}he impact of sieving on heterotrophic respiration
                      response to water content in loamy and sandy topsoils},
      journal      = {Geoderma},
      volume       = {272},
      issn         = {0016-7061},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2016-06170},
      pages        = {73 - 82},
      year         = {2016},
      abstract     = {Understanding the relation between soil heterotrophic
                      respiration and water content is important for the
                      prediction of climate change effects on soil CO2 emissions.
                      In order to quantify the influence of air-drying and sieving
                      with 2 mm meshes on the heterotrophic respiration response
                      to soil water content we incubated intact cores and sieved
                      samples of two loamy and two sandy soils for six levels of
                      effective soil water saturation. We further determined soil
                      textural properties and the soil water retention curves of
                      the soils with the intent to identify links between soil
                      physical characteristics and moisture sensitivity functions
                      of heterotrophic respiration. The incubation of sieved and
                      intact soils revealed distinct differences in the response
                      of heterotrophic respiration to soil water content. The
                      sieved soils exposed a threshold-type behaviour, whereas the
                      undisturbed soils exposed a quadratic increase of
                      heterotrophic respiration with increasing effective soil
                      water saturation. Further, we detected significant
                      correlations between the moisture response functions of the
                      undisturbed soils and soil texture. From the comparison of
                      sieved and intact soil incubations we conclude that the
                      destruction of soil structure by sieving hampers the
                      transferability of measured soil moisture response of
                      heterotrophic respiration to real-world conditions. For
                      modelling purposes we suggest the use of a quadratic
                      function between relative respiration and effective
                      saturation for soils with a clay fraction < $20\%.$},
      cin          = {IBG-3},
      ddc          = {550},
      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:000374077500008},
      doi          = {10.1016/j.geoderma.2016.03.002},
      url          = {https://juser.fz-juelich.de/record/820906},
}