Molecular organic indicators for human activities in the Roman harbor of Ephesus, Turkey.

Abstract: Intensive organic‐geochemical analyses were applied to sediment core samples from the Roman harbor of Ephesus that date to the open, protected, and post‐harbor time periods. Screening analyses revealed a substance spectrum comprising n‐alkanes, fatty acids, polycyclic aromatic hydrocarbons (PAHs), and selected terpenoids. All these substance groups have been quantified and show a significant increase of concentration in the samples affected by the intensive use of Ephesus’ Roman harbor. However, a unique indicator substance or a single anthropogenic marker compound directly reflecting ancient harbor activities has not been identified. Nonetheless, systematic changes in the patterns of some major organic substance groups (PAHs, fatty acids, and n‐alkanes) point to a significant change in the composition of organic matter (OM), which might reflect increased anthropogenic impacts during Ephesus’ flourishing period. These observations are likely related to enhanced anthropogenic use of natural products, such as waxes, and subsequent discharge by municipal sewage or the direct use and emission of such products in the harbor area. This study clearly demonstrates the usefulness of indicative organic compounds and changes in their patterns through time to detect the activities of ancient civilizations. This approach can be transferred to other sedimentary geoarchives associated with former settlement activities. [ABSTRACT FROM AUTHOR]