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@ARTICLE{Gottselig:877708,
      author       = {Gottselig, N. and Sohrt, J. and Uhlig, D. and Nischwitz, V.
                      and Weiler, M. and Amelung, W.},
      title        = {{G}roundwater controls on colloidal transport in forest
                      stream waters},
      journal      = {The science of the total environment},
      volume       = {717},
      issn         = {0048-9697},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-02411},
      pages        = {134638},
      year         = {2020},
      abstract     = {Biogeochemical changes of whole catchments may, at least in
                      part, be deduced from changes in streamwater composition. We
                      hypothesized that there are seasonal variations of natural
                      nanoparticles (NNP; 1–100 nm) and fine colloids (<300 nm)
                      in stream water, which differ in origin depending on
                      catchmentinflow parameters. To test this hypothesis, we
                      assessed the annual dynamics of the elemental compositionof
                      NNP and fine colloids in multiple water compartments, namely
                      in stream water, above and belowcanopy precipitation,
                      groundwater and lateral subsurface flow from the Conventwald
                      catchment,Germany. In doing so, we monitored meteorological
                      and hydrological parameters, total element loads,and
                      analyzed element concentrations of org C, Al, Si, P, Ca, Mn
                      and Fe by Asymmetric Flow Field FlowFractionation (AF4). The
                      results showed that colloid element concentrations were < 5
                      mmol/L. Up to anaverage of $55\%$ (Fe) of total element
                      concentrations were not truly dissolved but bound to NNP and
                      finecolloids. The colloid patterns showed seasonal
                      variability with highest loads in winter. The presence
                      ofgroundwater-derived colloidal Ca in stream water showed
                      that groundwater mainly fed the streamsthroughout the whole
                      year. Overall, the results showed that different water
                      compartments vary in theNNP and fine colloidal composition
                      making them a suitable tool to identify the streams NNP and
                      fine colloidsources. Given the completeness of the dataset
                      with respect to NNP and fine colloids in multiplewater
                      compartments of a single forest watershed this study adds to
                      the hitherto underexplored role ofNNP and fine colloids in
                      natural forest watersheds.},
      cin          = {IBG-3 / ZEA-3},
      ddc          = {610},
      cid          = {I:(DE-Juel1)IBG-3-20101118 / I:(DE-Juel1)ZEA-3-20090406},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:31837854},
      UT           = {WOS:000519994800060},
      doi          = {10.1016/j.scitotenv.2019.134638},
      url          = {https://juser.fz-juelich.de/record/877708},
}