Socio-environmental implications of shifting subsistence practices at Diallowali, a Late Stone Age site system in the Middle Senegal Valley

In this paper we present the results of archaeological research at the Late Stone Age site of Diallowali, located along the western edge of the Middle Senegal Valley, northern Senegal. As the occupation spans the period between 3100-2400 years BP, it is contemporary with few other West African sites, and therefore represents a unique – and uniquely detailed – archive. Excavations conducted between 2014–2017 revealed deeply stratified and dense deposits, yielding more than 5,000 kg of pottery and 169 kg of faunal material – the largest faunal assemblage of any site in West Africa. Thus, the present study focuses on the zooarchaeological data and their implications for shifting environmental conditions, subsistence practices, and social institutions at the site. The faunal assemblage reflects the exploitation of a remarkable diversity of wild animals, including a range of bovids, suids, carnivores, rodents, hippopotami, birds, and various aquatic resources – representing local conditions at the end of the African Humid Period. Interestingly, the consistent presence of domestic livestock, as well as Bos taurus figurines and ceramic ‘arm-bands’ throughout the occupation support a connection to Saharan agro-pastoral communities possibly escaping the Late Holocene aridification. Therefore, the keeping of low numbers of Bos taurus and Ovis/Capra, while maintaining a high reliance on hunting, fishing, and gathering wild plants, likely functioned as a risk-buffering strategy to manage against environmentally unpredictable periods.