Organic Phases in Bivalve (Arctica Islandica) Shells: Their Bulk and Amino Acid Nitrogen Stable Isotope Compositions

Publication type:
Journal article
Metadata:
Autoren
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:001090328800001&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1029/2023GC011147
eISSN
1525-2027
Externe Identifier
  • Clarivate Analytics Document Solution ID: W2YF0
Ausgabe der Veröffentlichung
10
Zeitschrift
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
Schlüsselwörter
  • nitrogen isotope composition
  • amino acids
  • bivalve shells
  • pretreatment protocols
Artikelnummer
ARTN e2023GC011147
Datum der Veröffentlichung
2023
Status
Published
Titel
Organic Phases in Bivalve (<i>Arctica Islandica</i>) Shells: Their Bulk and Amino Acid Nitrogen Stable Isotope Compositions
Sub types
  • Article
Ausgabe der Zeitschrift
24

Data source: Web of Science (Lite)

Other metadata sources:
Abstract
<jats:title>Abstract</jats:title><jats:p>The stable nitrogen isotope composition of bivalve shell organics serves as a proxy for nitrogen fluxes in modern and past ecosystems. An essential prerequisite to reconstruct environmental variables from δ<jats:sup>15</jats:sup>N values of bivalve shells is to understand if pristine isotope signals can be retrieved from shell organics after sample pretreatment. δ<jats:sup>15</jats:sup>N analyses of fossil shells should be limited to the intra‐crystalline organic matrix (intra‐OM), which is trapped within biomineral units and less likely contaminated or diagenetically overprinted than inter‐crystalline organics (inter‐OM). However, it remains unclear whether the different shell organic phases (insoluble/soluble inter‐OM, intra‐OM) are isotopically distinct and whether δ<jats:sup>15</jats:sup>N values of intra‐OM agree with those of bulk organic matter. These questions were tackled by applying different solvents (H<jats:sub>2</jats:sub>O, HCl, H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>, NaOCl) to homogenized shell powder of a modern <jats:italic>Arctica islandica</jats:italic>. Milli‐Q water did not alter bulk δ<jats:sup>15</jats:sup>N values indicating the dissolution of the inter‐OM was negligible. Acid‐extracted intra‐OM exhibited a larger isotope variation within replicates and showed a minor but significant fractionation in bulk δ<jats:sup>15</jats:sup>N values related to the loss of acid‐soluble components. Compared to H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>, NaOCl oxidative treatment was more effective in cleaning inter‐OM and produced reliable bulk and amino acid (AA)‐specific δ<jats:sup>15</jats:sup>N data of intra‐OM. Furthermore, differences in the relative abundance and δ<jats:sup>15</jats:sup>N values of individual AAs suggested that the N isotope composition is not uniform within shells, and the N‐bearing content and AA composition differ between organic phases. Future studies should test the capability of bulk and CSIA‐AA δ<jats:sup>15</jats:sup>N proxies in fossil shells as paleoenvironmental archives.</jats:p>
Autoren
DOI
10.1029/2023gc011147
eISSN
1525-2027
ISSN
1525-2027
Ausgabe der Veröffentlichung
10
Zeitschrift
Geochemistry, Geophysics, Geosystems
Sprache
en
Online publication date
2023
Datum der Veröffentlichung
2023
Status
Published
Herausgeber
American Geophysical Union (AGU)
Herausgeber URL
http://dx.doi.org/10.1029/2023gc011147
Datum der Datenerfassung
2024
Titel
Organic Phases in Bivalve (<i>Arctica Islandica</i>) Shells: Their Bulk and Amino Acid Nitrogen Stable Isotope Compositions
Ausgabe der Zeitschrift
24

Data source: Crossref

Author's licence
CC-BY
Autoren
Hosting institution
Universitätsbibliothek Mainz
Sammlungen
  • DFG-491381577-G
Resource version
Published version
DOI
10.1029/2023GC011147
File(s) embargoed
false
Open access
true
ISSN
1525-2027
Ausgabe der Veröffentlichung
10
Zeitschrift
Geochemistry, geophysics, geosystems
Schlüsselwörter
  • 550 Geowissenschaften
  • 550 Earth sciences
Sprache
eng
Open access status
Open Access
Paginierung
e2023GC011147
Datum der Veröffentlichung
2023
Public URL
https://openscience.ub.uni-mainz.de/handle/20.500.12030/10142
Herausgeber
Wiley
Datum der Datenerfassung
2024
Datum, an dem der Datensatz öffentlich gemacht wurde
2024
Zugang
Public
Titel
Organic phases in bivalve (Arctica Islandica) shells: their bulk and amino acid nitrogen stable isotope compositions
Ausgabe der Zeitschrift
24

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