% 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{Ravenek:153959,
      author       = {Ravenek, Janneke M. and Bessler, Holger and Engels,
                      Christof and Scherer-Lorenzen, Michael and Gessler, Arthur
                      and Gockele, Annette and De Luca, Enrica and Ebeling, Anne
                      and Roscher, Christiane and Schmid, Bernhard and Weisser,
                      Wolfgang W. and Wirth, Christian and de Kroon, Hans and
                      Weigelt, Alexandra and Mommer, Liesje and Temperton, Vicky},
      title        = {{L}ong-term study of root biomass in a biodiversity
                      experiment reveals shifts in diversity effects over time},
      journal      = {Oikos},
      volume       = {123},
      number       = {12},
      issn         = {0030-1299},
      address      = {Oxford},
      publisher    = {Wiley-Blackwell},
      reportid     = {FZJ-2014-03399},
      pages        = {1528–1536},
      year         = {2014},
      abstract     = {Biodiversity experiments generally report a positive effect
                      of plant biodiversity on aboveground biomass (overyielding),
                      which typically increases with time. Various studies also
                      found overyielding for belowground plant biomass, but this
                      has never been measured over time. Also, potential
                      underlying mechanisms have remained unclear. Differentiation
                      in rooting patterns among plant species and plant functional
                      groups has been proposed as a main driver of the observed
                      biodiversity effect on belowground biomass, leading to more
                      efficient belowground resource use with increasing
                      diversity, but so far there is little evidence to support
                      this. We analyzed standing root biomass and its distribution
                      over the soil profile, along a 1–16 species richness
                      gradient over eight years in the Jena Experiment in Germany,
                      and compared belowground to aboveground overyielding.In our
                      long-term dataset, total root biomass increased with
                      increasing species richness but this effect was only
                      apparent after four years. The increasingly positive
                      relationship between species richness and root biomass,
                      explaining $12\%$ of overall variation and up to $28\%$ in
                      the last year of our study, was mainly due to decreasing
                      root biomass at low diversity over time. Functional group
                      composition strongly affected total standing root biomass,
                      explaining $44\%$ of variation, with grasses and legumes
                      having strong overall positive and negative effects,
                      respectively. Functional group richness or interactions
                      between functional group presences did not strongly
                      contribute to overyielding. We found no support for the
                      hypothesis that vertical root differentiation increases with
                      species richness, with functional group richness or
                      composition. Other explanations, such as stronger negative
                      plant–soil feedbacks in low-diverse plant communities on
                      standing root biomass and vertical distribution should be
                      considered.},
      cin          = {IBG-2},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {89582 - Plant Science (POF2-89582)},
      pid          = {G:(DE-HGF)POF2-89582},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000345306600013},
      doi          = {10.1111/oik.01502},
      url          = {https://juser.fz-juelich.de/record/153959},
}