Letter

Earliest direct evidence of plant processing in prehistoric Saharan pottery

  • Nature Plants 3, Article number: 16194 (2016)
  • doi:10.1038/nplants.2016.194
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Abstract

The invention of thermally resistant ceramic cooking vessels around 15,000 years ago was a major advance in human diet and nutrition1,​2,​3, opening up new food groups and preparation techniques. Previous investigations of lipid biomarkers contained in food residues have routinely demonstrated the importance of prehistoric cooking pots for the processing of animal products across the world4. Remarkably, however, direct evidence for plant processing in prehistoric pottery has not been forthcoming, despite the potential to cook otherwise unpalatable or even toxic plants2,5. In North Africa, archaeobotanical evidence of charred and desiccated plant organs denotes that Early Holocene hunter-gatherers routinely exploited a wide range of plant resources6. Here, we reveal the earliest direct evidence for plant processing in pottery globally, from the sites of Takarkori and Uan Afuda in the Libyan Sahara, dated to 8200–6400 bc. Characteristic carbon number distributions and δ13C values for plant wax-derived n-alkanes and alkanoic acids indicate sustained and systematic processing of C3/C4 grasses and aquatic plants, gathered from the savannahs and lakes in the Early to Middle Holocene green Sahara.

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References

  1. 1.

    , , , & The raw and the stolen: cooking and the ecology of human origins. Curr. Anth. 40, 567–594 (1999).

  2. 2.

    & The energetic significance of cooking. J. Hum. Evol. 57, 379–391 (2009).

  3. 3.

    et al. Isotopic evidence of early hominin diets. Proc. Natl Acad. Sci. USA 110, 10513–10518 (2013).

  4. 4.

    et al. Earliest date for milk use in the Near East and southeastern Europe linked to cattle herding. Nature 455, 528–531 (2008).

  5. 5.

    The roasted and the boiled: food composition and heat treatment with special emphasis on pit-hearth cooking. J. Anth. Archaeol. 16, 1–48 (1997).

  6. 6.

    Plant exploitation and ethnopalynological evidence from the Wadi Teshuinat area (Tadrart Acacus, Libyan Sahara). J. Archaeol. Sci. 35, 1619–1642 (2008).

  7. 7.

    The broad spectrum revolution at 40: resource diversity, intensification, and an alternative to optimal foraging explanations. J. Anth. Archaeol. 31, 241–264 (2012).

  8. 8.

    et al. Abrupt onset and termination of the African Humid Period: rapid climate responses to gradual insolation forcing. Quat. Sci. Rev. 19, 347–361 (2000).

  9. 9.

    et al. First dairying in green Saharan Africa in the fifth millennium BC. Nature 486, 390–394 (2012).

  10. 10.

    et al. The emergence of pottery in Africa during the tenth millennium cal BC: new evidence from Ounjougou (Mali). Antiquity 83, 905–917 (2009).

  11. 11.

    et al. Modelling the diffusion of pottery technologies across Afro-Eurasia: emerging insights and future research. Antiquity 90, 590–603 (2016).

  12. 12.

    (ed.) in The Uan Afuda Cave: Hunter-Gatherers Societies of Central Sahara 223–237 (Arid Zone Archaeology Monographs 1, All'Insegna del Giglio, 1999).

  13. 13.

    & Holocene deposits of Saharan rock shelters: the case of Takarkori and other sites from the Tadrart Acacus Mountains (Southwest Libya). Afric. Archaeol. Rev. 30, 305–328 (2013).

  14. 14.

    , , & in The Uan Afuda Cave: Hunter-Gatherer Societies of Central Sahara (ed. di Lernia, S.) 131–148 (Arid Zone Archaeology Monographs 1, All'Insegna del Giglio, 1999).

  15. 15.

    et al. in Windows on the African Past: Current approaches to African Archaeobotany (eds Fahmy, A., Kahlheber, S. & D'Andrea, A. C.) 175–184 (Breitschuh & Kock, 2011).

  16. 16.

    & Leaf epicuticular waxes. Science 156, 1322–1335 (1967).

  17. 17.

    , , & Production of n-alkyl lipids in living plants and implications for the geologic past. Geochim. Cosmochim. Acta 75, 7472–7485 (2011).

  18. 18.

    , , & An n-alkane proxy for the sedimentary input of submerged/floating freshwater aquatic macrophytes. Org. Geochem. 31, 745–749 (2000).

  19. 19.

    & The Organic Chemistry of Museum Objects (Butterworth and Co. Ltd, 1994).

  20. 20.

    Vegetable Fats and Oils (Reinhold, 1954).

  21. 21.

    & The Chemical Constitution of Natural Fats (Wiley, 1964).

  22. 22.

    in Lipids: Structure and Function (ed. Stumpf, P. K.) 205–248 (Academic Press, 1980).

  23. 23.

    et al. An evaluation of analytical and interpretative methodologies for the extraction and identification of lipids associated with pottery sherds from the site of Sagalassos, Turkey. Archaeometry 49, 729–747 (2007).

  24. 24.

    in Methods in Plant Biochemistry Vol. 4 (eds Harwood, J. L. & Bowyer, J. R.) 105–158 (Academic Press, 1990).

  25. 25.

    Chemotaxonomic significance of leaf wax alkanes in the Gramineae. Biochem. System. Ecol. 24, 53–64 (1996).

  26. 26.

    , , , & Chemotaxonomic significance of distribution and stable carbon isotopic composition of long-chain alkanes and alkan-1-ols in C4 grass waxes. Org. Geochem. 37, 1303–1332 (2006).

  27. 27.

    , & in Chemistry and Biochemistry of Natural Waxes (ed. Kolattukudy, P. E.) 289–347 (Elsevier, 1976).

  28. 28.

    , , & Distribution and carbon isotope composition of lipid biomarkers in Lake Erhai and Lake Gahai sediments on the Tibetan plateau. J. Great Lakes Res. 37, 447–455 (2011).

  29. 29.

    et al. Takarkori rock shelter (SW Libya): an archive of Holocene climate and environmental changes in the central Sahara. Quat. Sci. Rev. 101, 36–60 (2014).

  30. 30.

    in Carbon Isotope Techniques (eds Coleman, D. C. & Fry, B.) 173–185 (Academic Press, 1991).

  31. 31.

    , , , & Molecular and carbon and hydrogen isotopic composition of n-alkanes in plant leaf waxes. Org. Geochem. 36, 1405–1417 (2005).

  32. 32.

    & Carbon: freshwater plants. Plant Cell Environ. 15, 1021–1035 (1992).

  33. 33.

    Cumbungi, Typha species: a staple Aboriginal food in Southern Australia. Austr. Aboriginal Stud. 1999, 33–50 (1999).

  34. 34.

    & Wild Plants of the Sierra Nevada (Univ. Nevada Press, 2006).

  35. 35.

    in Foraging and Farming: the Evolution of Plant Exploitation (eds Harris, D. R. & Hillman, G. C.) 207–239 (Unwin Hyman, 1989).

  36. 36.

    Porridge and pot, bread and oven: food ways and symbolism in Africa and the Near East from the Neolithic to the present. Cambridge Arch. J. 17, 165–182 (2007).

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Acknowledgements

We thank the UK Natural Environment Research Council for the Life Science Mass Spectrometry Facility (contract no. R8/H10/63; http://www.lsmsf.co.uk) and a PhD studentship to J.D (NE/1528242/1). We also thank H. Grant of the NERC Life Sciences Mass Spectrometry Facility (Lancaster node) for stable isotopic characterisation of reference standards and derivatizing agents. Sapienza University of Rome (Grandi Scavi di Ateneo) and the Italian Minister of Foreign Affairs (DGSP) are thanked for funding for the Italian Archaeological Mission in the Sahara to S.d.L. Libyan colleagues of the Department of Archaeology in Tripoli and Ghat, in particular S. Agab, Tripoli, are also thanked. Two PhD students, L. Olmi and R. Fornaciari, who studied the wild cereal archaeobotanical record, are also thanked. This study is dedicated to the memory of the remarkable scholar G. Eglinton, FRS, who died in March 2016. The findings of this paper rest in large part on the use of plant leaf wax biomarkers pioneered 50 years ago in Eglinton, G. & Hamilton, R.J. (1967)16.

Author information

Affiliations

  1. Organic Geochemistry Unit, School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK

    • Julie Dunne
    •  & Richard P. Evershed
  2. Laboratorio di Palinologia e Paleobotanica, Dipartimento di Scienze della Vita, Università degli Studi di Modena e Reggio Emilia, Viale Caduti in Guerra 127, 41121 Modena, Italy

    • Anna Maria Mercuri
  3. Dipartimento di Chimica, Università degli Studi di Milano, Via C. Golgi 19, 20133 Milano, Italy

    • Silvia Bruni
  4. Dipartimento di Scienze dell'Antichità, Sapienza, Università di Roma, Via dei Volsci, 122 – 00185 Roma, Italy

    • Savino di Lernia
  5. School of Geography, Archaeology & Environmental Sciences, University of the Witwatersrand, Johannesburg, Private Bag 3, Wits 2050, South Africa

    • Savino di Lernia

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Contributions

R.P.E. and S.d.L. conceived and planned the project. J.D., R.P.E., S.d.L. and A.M.M. wrote the paper. J.D. performed analytical work and data analysis. S.d.L. designed and directed the excavations and field sampling; A.M.M. studied the archaeobotanical materials and S.B. performed analytical work. All authors read and approved the final manuscript.

Competing interests

The authors declare no competing financial interests.

Corresponding author

Correspondence to Richard P. Evershed.

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    Supplementary Information

    Supplementary Tables 1–2, Supplementary Figures 1–6. Equation 1.