% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Thomas:859443,
      author       = {Thomas, Frank M and Rzepecki, Andreas and Lücke, Andreas
                      and Wiekenkamp, Inge and Rabbel, Inken and Pütz, Thomas and
                      Neuwirth, Burkhard},
      title        = {{G}rowth and wood isotopic signature of {N}orway spruce (
                      {P}icea abies ) along a small-scale gradient of soil
                      moisture},
      journal      = {Tree physiology},
      volume       = {38},
      number       = {12},
      issn         = {1758-4469},
      address      = {Victoria, BC},
      publisher    = {Heron},
      reportid     = {FZJ-2019-00299},
      pages        = {1855 - 1870},
      year         = {2018},
      abstract     = {Among the environmental factors that have an effect on the
                      isotopic signature of tree rings, the specific impact of
                      soil moisture on the Δ13C and, in particular, the δ18O
                      ratios has scarcely been investigated. We studied the
                      effects of soil type and soil moisture (from moderately
                      moist [Cambisol] to wet [Gleysol]) on the growth and
                      isotopic signature of tree rings of Norway spruce (Picea
                      abies [L.] H. Karst.), a widely distributed forest tree
                      species in Central Europe, at a small spatial scale in a
                      typical mature forest plantation in the low mountain ranges
                      of Western Germany. The δ18O ratios were lower in rings of
                      trees growing at the wettest microsite (Gleysol) than in
                      tree rings from the microsite with moderately moist soil
                      (Cambisol). This indicates higher uptake rates of
                      18O-unenriched soil water at the Gleysol microsite and
                      corresponds to less negative soil water potentials and
                      higher transpiration rates on the Gleysol plots. Contrary to
                      our expectations, the basal area increments, the Δ13C
                      ratios and the intrinsic water-use efficiency (calculated on
                      the basis of δ13C) did not differ significantly between the
                      Cambisol and the Gleysol microsites. For average values of
                      each microsite and year investigated, we found a
                      significantly positive correlation between δ13C and δ18O,
                      which indicates a consistent stomatal control over gas
                      exchange along the soil moisture gradient at comparable
                      relative air humidity in the stand. As δ18O ratios of tree
                      rings integrate responses of wood formation to soil moisture
                      over longer periods of time, they may help to identify
                      microsites differing in soil water availability along
                      small-scale gradients of soil moisture under homogeneous
                      climatic conditions and to explain the occurrence of
                      particular tree species along those gradients in forest
                      stands.},
      cin          = {IBG-3},
      ddc          = {580},
      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},
      pubmed       = {pmid:30265369},
      UT           = {WOS:000454356800009},
      doi          = {10.1093/treephys/tpy100},
      url          = {https://juser.fz-juelich.de/record/859443},
}