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

Autor: Champlin LK; Department of Biodiversity, Earth & Environmental Sciences and the Academy of Natural Sciences, Drexel University, Philadelphia, PA, USA; Department of Earth & Environment, Boston University, Boston, MA, USA. Electronic address: lenakchamplin@gmail.com., Gannon M; Department of Biodiversity, Earth & Environmental Sciences and the Academy of Natural Sciences, Drexel University, Philadelphia, PA, USA., Sessa JA; Department of Biodiversity, Earth & Environmental Sciences and the Academy of Natural Sciences, Drexel University, Philadelphia, PA, USA., Watson EB; Department of Ecology and Evolution, Stony Brook University, Stony Brook, NY, USA.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2024 Oct; Vol. 207, pp. 116902. Date of Electronic Publication: 2024 Sep 07.
DOI: 10.1016/j.marpolbul.2024.116902
Abstrakt: 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.)
Databáze: MEDLINE
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