Bivalve shells reflect 15N enrichment in a fertilizer-dominated estuary.
Mar Pollut Bull
; 207: 116902, 2024 Oct.
Article
em En
| MEDLINE
| ID: mdl-39244890
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 δ18O and δ13C, 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.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Monitoramento Ambiental
/
Estuários
/
Fertilizantes
/
Exoesqueleto
/
Isótopos de Nitrogênio
Limite:
Animals
País/Região como assunto:
America do norte
Idioma:
En
Revista:
Mar Pollut Bull
Ano de publicação:
2024
Tipo de documento:
Article
País de publicação:
Reino Unido