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HydroCrowd: a citizen science snapshot to assess the spatial control of nitrogen solutes in surface waters

Breuer, Lutz ; Hiery, Noreen ; Kraft, Philipp ; Bach, Martin ; Aubert, Alice H. ; Frede, Hans-Georg


Originalveröffentlichung: (2015) Scientific Reports 5:16503 doi:10.1038/srep16503
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URN: urn:nbn:de:hebis:26-opus-120026
URL: http://geb.uni-giessen.de/geb/volltexte/2016/12002/


Sammlung: Open Access - Publikationsfonds
Universität Justus-Liebig-Universit√§t Gie√üen
Institut: Institute for Landscape Ecology and Resources Management (ILR)
Fachgebiet: IFZ Interdisziplin√§res Forschungszentrum f√ľr Umweltsicherung
DDC-Sachgruppe: Landwirtschaft
Dokumentart: Aufsatz
Sprache: Englisch
Erstellungsjahr: 2015
Publikationsdatum: 21.03.2016
Kurzfassung auf Englisch: We organized a crowdsourcing experiment in the form of a snapshot sampling campaign to assess the spatial distribution of nitrogen solutes, namely, nitrate, ammonium and dissolved organic nitrogen (DON), in German surface waters. In particular, we investigated (i) whether crowdsourcing is a reasonable sampling method in hydrology and (ii) what the effects of population density, soil humus content and arable land were on actual nitrogen solute concentrations and surface water quality. The statistical analyses revealed a significant correlation between nitrate and arable land (0.46), as well as soil humus content (0.37) but a weak correlation with population density (0.12). DON correlations were weak but significant with humus content (0.14) and arable land (0.13). The mean contribution of DON to total dissolved nitrogen was 22%. Samples were classified as water quality class II or above, following the European Water Framework Directive for nitrate and ammonium (53% and 82%, respectively). Crowdsourcing turned out to be a useful method to assess the spatial distribution of stream solutes, as considerable amounts of samples were collected with comparatively little effort.
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