The freshwater reservoir effect in northern West Siberia: 14C and stable isotope data for fish from the late medieval town of Mangazeya.

The freshwater reservoir effect (FRE) was estimated for the northern part of West Siberia for the first time, based on securely dated samples from the late medieval town of Mangazeya existed mainly in AD 1601–1650. Twelve specimens of six species of freshwater fish were selected for ¹⁴C dating, and C and N stable isotopes analysis. The FRE varies from ca. 310 to ca. 1970 ¹⁴C years, and there is no consistency in terms of relationship to feeding habits or trophic level of fish; the FRE fluctuations for Mangazeya, as well as for other regions in northern Eurasia, are noteworthy. This information should be taken into account when ¹⁴C dating of bones of humans and domestic animals, who consume significant amount of freshwater fish, is conducted. This also applies to ¹⁴C dating of food crusts on the surface of pottery. [ABSTRACT FROM AUTHOR]