Bivalve shells reflect 15 N enrichment in a fertilizer-dominated estuary.

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  • Additional Information
    • Source:
      Publisher: Elsevier Country of Publication: England NLM ID: 0260231 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-3363 (Electronic) Linking ISSN: 0025326X NLM ISO Abbreviation: Mar Pollut Bull Subsets: MEDLINE
    • Publication Information:
      Publication: 2003- : Oxford : Elsevier
      Original Publication: London, Macmillan.
    • Subject Terms:
      Estuaries* ; Nitrogen Isotopes*/analysis ; Fertilizers*/analysis ; Environmental Monitoring* ; Animal Shells*/chemistry; Animals ; Water Pollutants, Chemical/analysis ; California ; Nitrogen/analysis ; Bivalvia ; Agriculture ; Mytilus
    • Abstract:
      Agricultural nitrogen (N) contributes a dominant percentage to global N pollution in the coastal zone. Emerging research on N isotopes in bivalve shells has shown value for reconstructing historical increases in estuarine wastewater inputs. However, applications for fertilizer N are understudied. Here, we integrate the study of organic N isotopes, in concert with δ 18 O and δ 13 C, in estuarine bivalve shells to investigate spatial and long-term changes in nitrogen inputs and sources. Modern, museum-collected, and subfossil specimens of the genera Mytilus and Ostrea were profiled in a California estuary with an intensely agricultural watershed. Spatial patterns in bivalve isotopic composition reflected gradients in watershed nutrient inputs and productivity parameters. Furthermore, a comparison between modern and historical periods revealed changes in nutrient source or processing over the last 1,000 years. The N isotope values from shells offer perspective on agricultural pollution in estuaries.
      Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
      (Copyright © 2024 Elsevier Ltd. All rights reserved.)
    • Contributed Indexing:
      Keywords: Mytilus; Nitrogen; Ostrea; Proxy; Shell; Stable isotope
    • Accession Number:
      0 (Nitrogen Isotopes)
      0 (Fertilizers)
      0 (Water Pollutants, Chemical)
      N762921K75 (Nitrogen)
    • Publication Date:
      Date Created: 20240908 Date Completed: 20240917 Latest Revision: 20240917
    • Publication Date:
      20240917
    • Accession Number:
      10.1016/j.marpolbul.2024.116902
    • Accession Number:
      39244890