What’s on the menu in a Celtic town? Dietary reconstruction for individuals from settlement features and two cemeteries at Basel-Gasfabrik, Switzerland

The late Iron Age (150–80 BC) proto-urban site of Basel-Gasfabrik, Switzerland, yielded numerous human skeletal remains, with individuals of all ages and both sexes being found in two cemeteries and in various features of the settlement itself. About 200 inhumations and two cremation burials as well as isolated skulls and bones attest to complex mortuary practices. Stable carbon and nitrogen isotope analyses of 90 human, 48 faunal, and seven cereal samples provide a rich database for dietary reconstruction. The results point to a diet that was largely based on C3 plants with a limited contribution of herbivore or pig meat and/or dairy products. Divergent isotope ratios can be attributed to the consumption of chicken meat/eggs or seasonally available salmon. Moreover, the contribution of C4 plants, supposedly millet, to human diets is well documented at Basel as well as at other central European Iron Age sites.We found no significant dietary distinctions between males and females. In children, indications for breastfeeding terminate between 1.5 and about 4 years of age, with isotopic differences emerging with regard to the investigated skeletal elements. The stable isotope data from different burial contexts, forms of mortuary practice, and presence or type of funerary objects overlap widely, providing only tentative indications for dietary differentiation within the living population. These findings distinguish Basel-Gasfabrik from other Iron Age sites and call for further integrative studies for deciphering the complex mechanisms behind the highly differentiated mortuary practices in the late Iron Age

Lapita diet in remote oceania: new stable isotope evidence from the 3000-year-old Teouma site, Efate Island, Vanuatu.

Remote Oceania was colonized ca. 3000 BP by populations associated with the Lapita Cultural Complex, marking a major event in the prehistoric settlement of the Pacific Islands. Although over 250 Lapita sites have been found throughout the Western Pacific, human remains associated with Lapita period sites are rare. The site of Teouma, on Efate Island, Vanuatu has yielded the largest burial assemblage (n=68 inhumations) of Lapita period humans ever discovered, providing a unique opportunity for assessing human adaptation to the environment in a colonizing population. Stable isotope ratios (δ13C, δ15N, δ34S) of human bone collagen from forty-nine Teouma adults were analyzed against a comprehensive dietary baseline to assess the paleodiet of some of Vanuatu's earliest inhabitants. The isotopic dietary baseline included both modern plants and animals (n=98) and prehistoric fauna from the site (n=71). The human stable isotope data showed that dietary protein at Teouma included a mixture of reef fish and inshore organisms and a variety of higher trophic marine (e.g. marine turtle) and terrestrial animals (e.g. domestic animals and fruit bats). The domestic pigs and chickens at Teouma primarily ate food from a C3 terrestrial environment but their δ15N values indicated that they were eating foods from higher trophic levels than those of plants, such as insects or human fecal matter, suggesting that animal husbandry at the site may have included free range methods. The dietary interpretations for the humans suggest that broad-spectrum foraging and the consumption of domestic animals were the most important methods for procuring dietary protein at the site. Males displayed significantly higher δ15N values compared with females, possibly suggesting dietary differences associated with labor specialization or socio-cultural practices relating to food distribution