Articles | Volume 75, issue 2
https://doi.org/10.5194/egqsj-75-173-2026
https://doi.org/10.5194/egqsj-75-173-2026
Research article
 | 
14 Oct 2026
Research article |  | 14 Oct 2026

Paleoseasonality through serial stable isotope analysis of Pleistocene to recent Etheria elliptica shells from the middle Atbara River, eastern Sudan

Aisha Huseen, Robert Bussert, Mosab Mohammednoor, Ulrich Struck, Sumiko Tsukamoto, Ali Eisawi, and Faysal Bibi

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Cited articles

Abbate, E., Albianelli, A., Awad, A., Billi, P., Bruni, P., Delfino, M., Ferretti, M. P., Filippi, O., Gallai, G., Ghinassi, M., Lauritzen, S.-E., Vetro, D. L., Martínez-Navarro, B., Martini, F., Napoleone, G., Bedri, O., Papini, M., Rook, L., and Sagri, M.: Pleistocene environments and human presence in the middle Atbara valley (Khashm El Girba, Eastern Sudan), Palaeogeogr. Palaeocl., 292, 12–34, https://doi.org/10.1016/j.palaeo.2010.03.022, 2010. 
Abell, P. I., Amegashitsi, L., and Ochumba, P. B. O.: The shells of Etheria elliptica as recorders of seasonality at Lake Victoria, Palaeogeogr. Palaeocl., 119, 215–219, https://doi.org/10.1016/0031-0182(95)00019-4, 1996. 
Adam, E. and Suleiman, M.: Reservoir Sediment Management Practices in Sudan: A Case Study of Khashm El-Girba Dam, in: Wadi Flash Floods, edited by: Sumi, T., Kantoush, S. A., and Saber, M., Springer Singapore, Singapore, 455–471, https://doi.org/10.1007/978-981-16-2904-4_18, 2022. 
Akélé, G. D., Agadjihouèdé, H., Mensah, G. A., and Lalèyè, P. A.: Population dynamics of freshwater oyster Etheria elliptica (Bivalvia: Etheriidae) in the Pendjari River (Benin-Western Africa), Knowl. Managt. Aquatic Ecosyst., 6, https://doi.org/10.1051/kmae/2015002, 2015. 
Bauska, T.: Ice core records of atmospheric carbon dioxide, in: Encyclopedia of Quaternary Science, Elsevier, 122–137, https://doi.org/10.1016/B978-0-323-99931-1.00264-6, 2025. 
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Short summary
Oxygen isotopes from Atbara River shells reveal that rainfall seasonality has remained similar to modern patterns for about 200 ka, highlighting persistent seasonality that structured savanna ecosystems. Carbon isotopes were more enriched in the Late Pleistocene for reasons still unclear. Today, the Atbara local meteoric water line matches other Nile basin rivers, reflecting strong evaporation and mixed moisture sources.
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