Isotopic variability in a stream longitudinal gradient: implications for trophic ecology

  title={Isotopic variability in a stream longitudinal gradient: implications for trophic ecology},
  author={Noemi Costas and Isabel Pardo},
  journal={Aquatic Sciences},
Stable isotope analysis (SIA) constitutes a powerful tool for evaluating trophic ecology. However, natural spatio-temporal isotopic variability may complicate the application of this approach in rivers. In this study, we analysed different sources of variability and potential limitations in the use of SIA along the Tea Stream (NW Iberian Peninsula). Gut content analyses (GCA), δ13C and δ15N ratios for major food web components were evaluated in replicate samples collected at six sites along the… CONTINUE READING
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