Differences in dietary patterns between the islands of South Vanuatu are expected due to differences in ecological and cultural characteristics of the islands and their complex histories of settlement, adaptation and interaction. This paper examines the human dietary practices of 32 individuals from three of the five islands in the region: Aniwa, Futuna and Tanna, between 2000 BP and the 20th century, using for the first time carbon and nitrogen isotope data measured in bone collagen. Our analysis includes an expanded baseline of local faunal and plant resources, with taxonomic identification of local faunal remains enhanced by proteomic determinations (Zooarchaeology by Mass Spectrometry; ZooMS). Human collagen δ13C values ranged from −19.7 to −16.2 ‰, and δ15N values from 6,3 to 9,7 ‰, with a large inter-individual variability. Based on our improved baseline, we suggested that the individuals with the highest δ13C and δ15N values would have consumed marine coral reef fish along with C3 plants. An individual with the lowest δ13C and δ15N values could have consumed mainly resources from mangrove. Four patterns were identified that may reflect the geographical characteristics of the islands, the normalisation of diet over time, the nutritional stress of individuals in relation to environmental and climatic factors, and social differentiation in food acquisition and/or consumption, illustrating issues of equifinality in bioarchaeological data interpretation.
Middens, commonly found in archaeological sites across different chronologies, serve as rich sedimentary archives of daily life by capturing the refuse and discarded artifacts of past human groups. This study focuses on the midden deposits of the Early Iron Age settlement site of Cerro de San Vicente (Central Iberia). We applied a high-resolution, microcontextual geoarchaeological approach, integrating soil micromorphology —including phytolith and charcoal analyses on thin sections—, sedimentary lipid biomarker analysis, X-Ray fluorescence (XRF), X-Ray diffraction (XRD) and magnetic properties analysis to investigate the formation processes and past functionality of the site’s midden deposits. Our findings reveal that the targeted sequences are primarily composed of wood ash and charred plant refuse, as well as trampled and disintegrated earth-based construction materials. These deposits are interpreted as the result of multiple hearth rake-out events, maintenance and construction activities, and possible spatially-related communal storage practices within the village. Stratigraphic connections between deposits from inside and outside the dwellings are proposed, linking the middens to an intermediate phase (ca. 600 BCE) of the village’s history. These results offer relevant insights into the spatial and temporal dynamics of refuse disposal, maintenance practices and space use at Cerro de San Vicente, highlighting the value of microcontextual geoarchaeological methods in unveiling domestic practices. This study contributes to enhancing our understanding of Early Iron Age socio-cultural and daily life practices in Central Iberia.