Biomarker indicators for tracing pollution

The natural factors that have acted on human societies have led them in turn to influence natural environments. This is the Anthropocene era characterized by intense socioeconomic activities. These are followed through pollution tracer biomarkers, unresolved compounds (UCM) and hopanes at the beginning and by the study of alkylbenzenes in the Sahel sebkhas and PAHs in the Gulf of Tunis.steranes are considered maturity markers and are useful for authenticating the presence of contamination in modern ecosystems. In the mouths of Meliane and El Bey where the C27/C29 ratio is close to unity, which makes these compounds pollution indicators.PAHs in the mouths of Meliane, El Bey and in the Khlij canal come from socio-economic activities manifested by the discharge of residues of petroleum origin.