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    • Eutrophication in Portuguese estuaries evidenced by δ15N of macrophytes 

      Castro, Paula; Valiela, Ivan; Freitas, Helena (Inter-Research, 2007-12-06)
      Terrestrial inputs of nitrogen in estuaries are increasing and altering salt marsh primary production, plant communities and associated biota. We used N isotope ratios and %N in Spartina maritima, Halimione portulacoides, ...