Dissolved nitrogen uptake versus nitrogen fixation: Mode of nitrogen acquisition affects stable isotope signatures of a diazotrophic cyanobacterium and its grazer

• Michelle Helmer,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Software, Visualization, Writing – original draft, Writing – review & editing

  Affiliations University of Konstanz, Limnological Institute, Konstanz, Germany, Wahnbachtalsperrenverband, Siegburg, Germany

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• Desiree Helmer,

  Roles Conceptualization, Investigation, Methodology, Project administration

  Affiliation University of Konstanz, Limnological Institute, Konstanz, Germany

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• Elizabeth Yohannes,

  Roles Conceptualization, Funding acquisition, Methodology, Supervision

  Affiliations University of Konstanz, Limnological Institute, Konstanz, Germany, Department of Bird Migration, Swiss Ornithological Institute, Sempach, Switzerland

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• Jason Newton,

  Roles Investigation, Methodology, Resources, Writing – review & editing

  Affiliation National Environmental Isotope Facility, Scottish Universities Environmental Research Centre, East Kilbride, United Kingdom

  https://orcid.org/0000-0001-7594-3693

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• Daniel R. Dietrich,

  Roles Funding acquisition, Supervision, Writing – review & editing

  Affiliation University of Konstanz, Human and Environmental Toxicology, Konstanz, Germany

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• Dominik Martin-Creuzburg

  Roles Conceptualization, Funding acquisition, Supervision, Writing – original draft, Writing – review & editing

  * E-mail: Dominik.Martin-Creuzburg@b-tu.de

  Affiliation Department of Aquatic Ecology, BTU Cottbus-Senftenberg, Research Station Bad Saarow, Bad Saarow, Germany

  https://orcid.org/0000-0002-4248-0730

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