Testing miniaturized extraction chromatography protocols for combined <scp>87Sr</scp>/<scp>86Sr</scp> and δ88/<scp>86Sr</scp> analyses of pore water by <scp>MC‐ICP‐MS</scp>

Argentino, Claudio; Lugli, Federico; Cipriani, Anna; Panieri, Giuliana

doi:10.1002/lom3.10435

Cited by 14 publications

(5 citation statements)

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“…Bulk rock samples were digested in closed-PTFE vessels on the hotplate (150°C), using a mixture of concentrated HNO 3 , HCl and HF, until total dissolution. Waters were filtered (5 μm) and acidified with HNO 3 to a concentration of 3 M [ 90 ]. Plant samples were air-dried, ashed at 650° C and digested with concentrated suprapur HNO 3 [ 91 ].…”

Section: Methodsmentioning

confidence: 99%

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Machine learning-based Sr isoscape of southern Sardinia: A tool for bio-geographic studies at the Phoenician-Punic site of Nora

et al. 2023

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Since prehistoric times, the island of Sardinia—in the western Mediterranean—has played a leading role in the dynamics of human population and mobility, in the circulation of raw materials and artefacts, idioms and customs, of technologies and ideas that have enriched the biological, linguistic and cultural heritage of local groups. For the Phoenician and Punic periods (from the 9th to the 3rd centuries BCE), the ancient site of Nora—in southern Sardinia—represents an emblematic case in the study of migratory phenomena that occurred on the Island from the Iron Age until the Roman conquest. Despite the importance of exploring (and characterising) such movements from a wider bio-cultural perspective, the application of bio-geochemical tools for geographical provenance to the ancient skeletal populations of Sardinia is yet scarce. The present work is the first step towards filling this gap with the development of the first isoscape of southern Sardinia using new bioavailable Sr isotope data and a machine-learning approach. From a geolithological point of view, Sardinia is rather heterogeneous and requires detailed studies to correctly assess the distribution of the isotopic signature of bioavailable Sr. The random forest model employed here to construct the Sr isoscape uses several external environmental and geological variables. The most important predictors are related to age and bedrock type, with additional input from local soil properties. A 10-fold cross-validation gives a mean square error of 0.0008 and an R-squared of 0.81, so the model correctly predicts the 87Sr/86Sr ratio of unknown areas. By using a Bayesian provenance assignment workflow, we tested the isoscape here produced to determine the geographic origin and the mobility of archaeological and modern fauna collected from the Phoenician-Punic site of Nora and the surrounding Pula Plain. Our results indicate that archaeological sheep and goats (87Sr/86Sr < 0.7090) are compatible with areas close to Nora and Pula Plain, in agreement with archaeological evidence of pastoralism in those areas. Modern wild and domesticated fauna (87Sr/86Sr > 0.7090) show compatibility with several natural and anthropogenic locations in southern Sardinia, as expected based on modern species distribution data. Finally, we discuss the large Sr isotopic variability of the Nora baseline, where human mobility studies of human cremated and inhumed individuals are currently underway.

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Section: Methodsmentioning

confidence: 99%

“…Strontium was purified in 30 μL-volume columns filled with Eichrom Sr spec–resin (100–150 μm bead size) as described in [ 90 ]. Sr was eluted with MilliQ water and collected in clean polypropylene vials.…”

Section: Methodsmentioning

confidence: 99%

Machine learning-based Sr isoscape of southern Sardinia: A tool for bio-geographic studies at the Phoenician-Punic site of Nora

et al. 2023

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“…About 5 mg of bioapatite powder for each sample was dissolved in 3M HNO 3 . The Sr separation from the matrix was performed through chromatographic Teflon columns filled with 30 μl of Eichrom Sr spec resin [ 121 , 122 ]. Once the columns were cleaned with MilliQ, the dissolved samples were loaded and the cations (not Sr) were desorbed by percolating 3M HNO 3 , to eliminate matrix ions.…”

Section: Methodsmentioning

confidence: 99%

Spatial ecology of moose in Sweden: Combined Sr-O-C isotope analyses of bone and antler

Armaroli,

Lugli,

Cipriani

et al. 2024

PLoS ONE

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The study of spatial (paleo)ecology in mammals is critical to understand how animals adapt to and exploit their environment. In this work we analysed the 87Sr/86Sr, δ18O and δ13C isotope composition of 65 moose bone and antler samples from Sweden from wild-shot individuals dated between 1800 and 1994 to study moose mobility and feeding behaviour for (paleo)ecological applications. Sr data were compared with isoscapes of the Scandinavian region, built ad-hoc during this study, to understand how moose utilise the landscape in Northern Europe. The 87Sr/86Sr isoscape was developed using a machine-learning approach with external geo-environmental predictors and literature data. Similarly, a δ18O isoscape, obtained from average annual precipitation δ18O values, was employed to highlight differences in the isotope composition of the local environment vs. bone/antler. Overall, 82% of the moose samples were compatible with the likely local isotope composition (n = 53), suggesting that they were shot not far from their year-round dwelling area. ‘Local’ samples were used to calibrate the two isoscapes, to improve the prediction of provenance for the presumably ‘non-local’ individuals. For the latter (n = 12, of which two are antlers and ten are bones), the probability of geographic origin was estimated using a Bayesian approach by combining the two isoscapes. Interestingly, two of these samples (one antler and one bone) seem to come from areas more than 250 km away from the place where the animals were hunted, indicating a possible remarkable intra-annual mobility. Finally, the δ13C data were compared with the forest cover of Sweden and ultimately used to understand the dietary preference of moose. We interpreted a difference in δ13C values of antlers (13C-enriched) and bones (13C-depleted) as a joint effect of seasonal variations in moose diet and, possibly, physiological stresses during winter-time, i.e., increased consumption of endogenous 13C-depleted lipids.

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“…5 mg of enamel (n = 38) were digested with suprapur nitric acid and processed through ion exchange chromatography. Sr was separated using 30 μl columns [ 127 ] filled with Eichrom Sr-spec resin. The 87 Sr/ 86 Sr ratio was determined with a Neptune MC-ICPMS housed at the Centro Interdipartimentale Grandi Strumenti (UNIMORE).…”

Section: Methodsmentioning

confidence: 99%

New insights on Celtic migration in Hungary and Italy through the analysis of non-metric dental traits

Piccirilli,

Sorrentino,

Lugli

et al. 2023

PLoS ONE

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The Iron Age is characterized by an extended interweaving of movements by Celts in Europe. Several waves of Celts from Western and Central Europe migrated southeast and west from the core area of the La Téne culture (between Bourgogne and Bohemia). Through the analysis of non-metric dental traits, this work aims to understand the biological relationship among Celtic groups arrived in Italy and the Carpathian Basin, as well as between local populations and Celtic newcomers. A total of 10 non-metric dental traits were analyzed to evaluate biological affinities among Celts (Sopron-Krautacker and Pilismarót-Basaharc) and Scythians-related populations from Hungary (Tápiószele), Celts from continental Europe (Switzerland and Austria), two Iron Age Etruscan-Celtic sites from northern Italy (Monterenzio Vecchio and Monte Bibele), 13 Iron Age central-southern Italic necropolises, and the northern Italian Bronze Age necropolis of Scalvinetto. Strontium isotopes were measured on individuals from the necropolis of Monte Bibele to infer their local or non-local origin. Results highlight the existence of statistically significant differences between Celts and autochthonous Italian groups. Celtic groups from Hungary and Italy (i.e., non-local individuals of Monterenzio Vecchio and Monte Bibele) share a similar biological background, supporting the historical records mentioning a common origin for Celts migrated to the eastern and southern borders of today’s Europe. The presence of a supposed Steppean ancestry both in Celts from Hungary and Celts from northern Italy corroborates the hypothesis of the existence of a westward migration of individuals and genes from the Steppe towards northern Italy during the Bronze and Iron Age, which contributed to the biological variability of pre-Celtic and later Celtic populations, respectively. Conversely, individuals from central-southern Italy show an autochthonous pre-Iron Age background. Lastly, this work supports the existence of Celtic migratory routes in northern Italy, as shown by biological and cultural admixture between Celts and Italics living together.

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Testing miniaturized extraction chromatography protocols for combined ⁸⁷Sr/⁸⁶Sr and δ^88/⁸⁶Sr analyses of pore water by MC‐ICP‐MS

Cited by 14 publications

References 50 publications

Machine learning-based Sr isoscape of southern Sardinia: A tool for bio-geographic studies at the Phoenician-Punic site of Nora

Machine learning-based Sr isoscape of southern Sardinia: A tool for bio-geographic studies at the Phoenician-Punic site of Nora

Spatial ecology of moose in Sweden: Combined Sr-O-C isotope analyses of bone and antler

New insights on Celtic migration in Hungary and Italy through the analysis of non-metric dental traits

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Testing miniaturized extraction chromatography protocols for combined 87Sr/86Sr and δ88/86Sr analyses of pore water by MC‐ICP‐MS

Cited by 14 publications

References 50 publications

Machine learning-based Sr isoscape of southern Sardinia: A tool for bio-geographic studies at the Phoenician-Punic site of Nora

Machine learning-based Sr isoscape of southern Sardinia: A tool for bio-geographic studies at the Phoenician-Punic site of Nora

Spatial ecology of moose in Sweden: Combined Sr-O-C isotope analyses of bone and antler

New insights on Celtic migration in Hungary and Italy through the analysis of non-metric dental traits

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Product

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Testing miniaturized extraction chromatography protocols for combined ⁸⁷Sr/⁸⁶Sr and δ^88/⁸⁶Sr analyses of pore water by MC‐ICP‐MS