% 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{Temperton:52616,
      author       = {Temperton, V. M. and Mwangi, P. N. and Scherer-Lorenzen, M.
                      and Schmid, B. and Buchmann, N.},
      title        = {{P}ositive interactions between nitrogen-fixing legumes and
                      four different neighbouring species in a biodiversity
                      experiment},
      journal      = {Oecologia},
      volume       = {151},
      issn         = {0029-8549},
      address      = {Berlin},
      publisher    = {Springer},
      reportid     = {PreJuSER-52616},
      pages        = {190 - 205},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The importance of facilitative processes due to the
                      presence of nitrogen-fixing legumes in temperate grasslands
                      is a contentious issue in biodiversity experiments. Despite
                      a multitude of studies of fertilization effects of legumes
                      on associated nonfixers in agricultural systems, we know
                      little about the dynamics in more diverse systems. We
                      hypothesised that the identity of target plant species
                      (phytometers) and the diversity of neighbouring plant
                      species would affect the magnitude of such positive species
                      interactions. We therefore sampled aboveground tissues of
                      phytometers planted into all plots of a grassland
                      biodiversity-ecosystem functioning experiment and analysed
                      their N concentrations, delta15N values and biomasses. The
                      four phytometer species (Festuca pratensis, Plantago
                      lanceolata, Knautia arvensis and Trifolium pratensis) each
                      belonged to one of the four plant functional groups used in
                      the experiment and allowed the effects of diversity on N
                      dynamics in individual species to be assessed. We found
                      significantly lower delta15N values and higher N
                      concentrations and N contents (amount of N per plant) in
                      phytometer species growing with legumes, indicating a
                      facilitative role for legumes in these grassland ecosystems.
                      Our data suggest that the main driving force behind these
                      facilitative interactions in plots containing legumes was
                      reduced competition for soil nitrate ("nitrate sparing"),
                      with apparent N transfer playing a secondary role.
                      Interestingly, species richness (and to a lesser extent
                      functional group number) significantly decreased delta15N
                      values, N concentrations and N content irrespective of any
                      legume effect. Possible mechanisms behind this effect, such
                      as increased N mineralisation and nitrate uptake in more
                      diverse plots, now need further investigation. The magnitude
                      of the positive interactions depended on the identity of the
                      phytometer species. Evidence for increased N uptake in
                      communities containing legumes was found in all three
                      nonlegume phytometer species, with a subsequent strong
                      increase in biomass in the grass F. pratensis across all
                      diversity levels, and a lesser biomass gain in P. lanceolata
                      and K. arvensis. In contrast, the legume phytometer species
                      T. pratense was negatively affected when other legumes were
                      present in their host communities across all diversity
                      levels.},
      keywords     = {Biodiversity / Biomass / Dipsacaceae: chemistry / Ecosystem
                      / Fabaceae: metabolism / Festuca: chemistry / Germany /
                      Nitrogen: analysis / Nitrogen: metabolism / Plantago:
                      chemistry / Population Dynamics / Species Specificity /
                      Trifolium: chemistry / Nitrogen (NLM Chemicals) / J
                      (WoSType)},
      cin          = {ICG-3},
      ddc          = {590},
      cid          = {I:(DE-Juel1)ICG-3-20090406},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Ecology},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:17048010},
      UT           = {WOS:000244302500002},
      doi          = {10.1007/s00442-006-0576-z},
      url          = {https://juser.fz-juelich.de/record/52616},
}