Genetic variation in prehistoric Sardinia

We sampled teeth from 53 ancient Sardinian (Nuragic) individuals who lived in the Late Bronze Age and Iron Age, between 3,430 and 2,700 years ago. After eliminating the samples that, in preliminary biochemical tests, did not show a high probability to yield reproducible results, we obtained 23 sequences of the mitochondrial DNA control region, which were associated to haplogroups by comparison with a dataset of modern sequences. The Nuragic samples show a remarkably low genetic diversity, comparable to that observed in ancient Iberians, but much lower than among the Etruscans. Most of these sequences have exact matches in two modern Sardinian populations, supporting a clear genealogical continuity from the Late Bronze Age up to current times. The Nuragic populations appear to be part of a large and geographically unstructured cluster of modern European populations, thus making it difficult to infer their evolutionary relationships. However, the low levels of genetic diversity, both within and among ancient samples, as opposed to the sharp differences among modern Sardinian samples, support the hypothesis of the expansion of a small group of maternally related individuals, and of comparatively recent differentiation of the Sardinian gene pools. © Springer-Verlag 2007

Carbon and nitrogen isotope analysis: diet before and after the arrival of ceramic at Forte Marechal Luz Site

This study focused on carbon and nitrogen stable isotope analysisof dentin and enamel of individuals buried in pre-ceramic and ceramic layers ofthe Forte Marechal Luz site, located in the coast of Santa Catarina State, southernBrazil. The dentin collagen values indicate that the individuals had a proteindiet based mainly on marine resources during the formation period of theanalyzed teeth. However, there is a slight difference in the carbon results betweenthe individuals related to the pre-ceramic and the ceramic periods, suggesting thatthe latter inhabitants were consuming a little bit more resources like C3 plantsand terrestrial fauna than before, and therefore indicating that there was a greaterdiversification in the diet after the arrival of the ceramic in the region.Bioarchaeology; isotopic analysis, shell mounds, potteryNesse estudo foram realizadas análises de isótopos de carbono e nitrogênio de esmalte dentário e dentina de indivíduos sepultados em camadas sem e com cerâmica do sítio Forte Marechal Luz, localizado no litoral de Santa Catarina. Os resultados do colágeno da dentina sugerem que os indivíduos teriam uma dieta proteica rica em recursos marinhos durante o período de formação dos dentes analisados. No entanto, comparando períodos anteriores com posteriores à presença da cerâmica, observa-se uma leve tendência para resultados mais negativos no carbono nas camadas com cerâmica, indicando um maior consumo de recursos como plantas C3 e animais terrestres durante os períodos posteriores de ocupação do sítio e, consequentemente uma evidência de maior diversificação alimentar

Bone Chemistry at Cerro Oreja: A Stable Isotope Perspective on the Development of a Regional Economy in the Moche Valley, Peru During the Early Intermediate Period

Abstract In this paper we test the hypothesis that an intensification of maize production preceded the development of a regional Moche political economy in the Moche Valley of north coastal Peru during the Early Intermediate period (400 B.C.—A.D. 600). To do so we analyze stable isotopic signatures of 48 bone apatite and 17 tooth enamel samples from human remains recovered from the site of Cerro Oreja, a large urban and ceremonial center in the Moche Valley. These remains date to the Guañape, Salinar, or Gallinazo phases and provide a diachronic picture of subsistence before the appearance of the Southern Moche state. The most notable patterns identified in the study include a lack of significant change in δ 13 C apatite values from the Guañape to Satinar phases, followed by a significant enrichment in δ 13 C apatite values from the Salinar to Gallinazo phases. Several lines of evidence, including archaeological context, dental data, and comparative carbon stable isotope data from experimental animal studies and studies of archaeological human remains support the interpretation that the observed 13 C enrichment in stable isotope values in the Gallinazo phase primarily reflects maize intensification. The stable isotope data from Cerro Oreja thus suggest that a shift in subsistence toward a highly productive and storable crop may have served as an important precursor to state development during the Early Intermediate period in the Moche Valley

Phylogeography of a Land Snail Suggests Trans-Mediterranean Neolithic Transport

Background: Fragmented distribution ranges of species with little active dispersal capacity raise the question about their place of origin and the processes and timing of either range fragmentation or dispersal. The peculiar distribution of the land snail Tudorella sulcata s. str. in Southern France, Sardinia and Algeria is such a challenging case. Methodology: Statistical phylogeographic analyses with mitochondrial COI and nuclear hsp70 haplotypes were used to answer the questions of the species' origin, sequence and timing of dispersal. The origin of the species was on Sardinia. Starting from there, a first expansion to Algeria and then to France took place. Abiotic and zoochorous dispersal could be excluded by considering the species' life style, leaving only anthropogenic translocation as parsimonious explanation. The geographic expansion could be dated to approximately 8,000 years before present with a 95% confidence interval of 10,000 to 3,000 years before present. Conclusions: This period coincides with the Neolithic expansion in the Western Mediterranean, suggesting a role of these settlers as vectors. Our findings thus propose that non-domesticated animals and plants may give hints on the direction and timing of early human expansion routes

Italy: The Archaeology of Palaeoshorelines, Coastal Caves and Seafaring Connections

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The Emergence of Copper-Based Metallurgy in the Maltese Archipelago: an Archaeometric Perspective

The amount of prehistoric metal items discovered in the Maltese archipelago during the BronzeAge very limited in number. The majority of the artifacts are traditionally considered Aegean imports from nearby Sicily. Nineteen objects, currently on display in the National Archaeological Museum of Valletta, and dated between the 17th and 12th century BCE, represent the main evidence of metalwork in Malta during the Bronze Age. Daggers, axes, vessels, rings, pins and an ingot were found in Early and Middle/Late Bronze Age sites and were traditionally interpreted as made from bronze solely on the account of a direct visual exam. The aim of this contribution is to present the results of research carried out on those artifacts applying non-destructive portable X-ray fluorescence spectrometry (pXRF) in order to ascertain their chemical composition, to compare the data with those available for Sicily and the Aegean and discuss the archaeological implications of such outcomes

The Emergence of Copper-Based Metallurgy in the Maltese Archipelago: an Archaeometric Perspective

The amount of prehistoric metal items discovered in the Maltese archipelago during the BronzeAge very limited in number. The majority of the artifacts are traditionally considered Aegean imports from nearby Sicily. Nineteen objects, currently on display in the National Archaeological Museum of Valletta, and dated between the 17th and 12th century BCE, represent the main evidence of metalwork in Malta during the Bronze Age. Daggers, axes, vessels, rings, pins and an ingot were found in Early and Middle/Late Bronze Age sites and were traditionally interpreted as made from bronze solely on the account of a direct visual exam. The aim of this contribution is to present the results of research carried out on those artifacts applying non-destructive portable X-ray fluorescence spectrometry (pXRF) in order to ascertain their chemical composition, to compare the data with those available for Sicily and the Aegean and discuss the archaeological implications of such outcomes