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http://doi.org/10.25358/openscience-5622
Autoren: | Weber, Michael Tacail, Théo Lugli, Federico Clauss, Marcus Weber, Katrin Leichliter, Jennifer Winkler, Daniela E. Mertz-Kraus, Regina Tütken, Thomas |
Titel: | Strontium uptake and intra-population 87Sr/86Sr variability of bones and teeth : controlled feeding experiments with rodents (Rattus norvegicus, Cavia porcellus) |
Online-Publikationsdatum: | 2-Feb-2021 |
Erscheinungsdatum: | 2020 |
Sprache des Dokuments: | Englisch |
Zusammenfassung/Abstract: | Strontium isotopes in biogenic apatite, especially enamel, are widely employed to determine provenance and track migration in palaeontology and archaeology. Body tissues record the 87Sr/86Sr of bioavailable Sr of ingested food and water. To identify non-local individuals, knowledge of the 87Sr/86Sr of a non-migratory population is required. However, varying factors such as tissue turnover rates, feeding selectivity, Sr content, digestibility of food, and the ingestion of mineral dust can influence body tissue 87Sr/86Sr. To evaluate the Sr contribution of diet and water to mammalian hard tissues 87Sr/86Sr, controlled feeding studies are necessary. Here we present 87Sr/86Sr from controlled feeding experiments with two rodent species (Rattus norvegicus, Cavia porcellus). Due to the continuous and fast incremental growth of rat and guinea pig incisors (~0.1 – 0.5 mm/day), their enamel is expected to record isotopic dietary changes. For Experiment-1: Diet Switch, animals were switched from their respective supplier food to a pelleted experimental diet containing either insect-, plant-, or meat-meal and a staggered-sampling approach was used to monitor the 87Sr/86Sr changes in rat incisor enamel and bone over the course of the experiment. In Experiment-2: Basic Diets, separated cohorts (n = 6) of rats and guinea pigs were fed one of the three pelleted diets and received tap water for 54 days. While the rat incisors showed a complete tissue turnover, the slower-growing guinea pig incisors partially retained supplier diet-related isotopic compositions. In addition, one group of rats fed plant-meal pellets received Sr-rich mineral water, demonstrating that drinking water can be an important Sr source in addition to diet. Additionally, a leaching experiment showed that only a small fraction of diet-related Sr is bioavailable. Finally, in Experiment-3: Dust Addition, guinea pigs were fed pellets with and without addition of 4% of isotopically distinct dust (loess or kaolin). Animals that received kaolin-containing pellets displayed increased enamel 87Sr/86Sr. Intra-population 87Sr/86Sr variability within each feeding group was small and thus we conclude that it should not affect interpretations of 87Sr/86Sr in provenance studies. However, the differences between bulk food and leachate 87Sr/86Sr highlight the importance of Sr bioavailability for provenance studies and Sr isoscapes. |
DDC-Sachgruppe: | 550 Geowissenschaften 550 Earth sciences 590 Tiere (Zoologie) 590 Zoological sciences |
Veröffentlichende Institution: | Johannes Gutenberg-Universität Mainz |
Organisationseinheit: | FB 09 Chemie, Pharmazie u. Geowissensch. |
Veröffentlichungsort: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-5622 |
Version: | Published version |
Publikationstyp: | Zeitschriftenaufsatz |
Nutzungsrechte: | CC BY |
Informationen zu den Nutzungsrechten: | https://creativecommons.org/licenses/by/4.0/deed.en |
Zeitschrift: | Frontiers in Ecology and Evolution 8 |
Seitenzahl oder Artikelnummer: | 569940 |
Verlag: | Frontiers Media |
Verlagsort: | Lausanne |
Erscheinungsdatum: | 2020 |
ISSN: | 2296-701X |
URL der Originalveröffentlichung: | https://doi.org/10.3389/fevo.2020.569940 |
DOI der Originalveröffentlichung: | 10.3389/fevo.2020.569940 |
Enthalten in den Sammlungen: | JGU-Publikationen |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | ||
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weber_michael-strontium_upta-20210202095935423.pdf | 3.23 MB | Adobe PDF | Öffnen/Anzeigen |