Dynamics of palaeoenvironmental conditions over the last millenia by archaeomalacological data

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  • Dynamics of palaeoenvironmental conditions over the last millenia by archaeomalacological data

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Title

Dynamics of palaeoenvironmental conditions over the last millenia by archaeomalacological data

Subject

S6-1, S3-4 Archaeomalacology: shells in the archaeological record - Shells as indicators of palaeoenvironment, site formation and transformation, oral

Description

Abstract:

We reconstructed dynamics of palaeoenvironmental conditions during the last millennium, based on analysis of invertebrates’ remains from archaeological site ADK-009 on Adak Island, Aleutian Islands. The site was excavated by members of an archaeological expedition, the Western Aleutian Archaeological and Palaeobiological Project (WAAPP), lead by Dr. West (University of Kansas). Radiocarbon analysis, made from fish bone collagen, showed that the cultural layers of the site ADK-009 was formed from the 6th to the 17th centuries cal AD. Zoogeographical analysis allows us to distinguish the different climatic periods during the existence of the ancient settlement. The warmer periods were observed from the middle of the 8th till the middle10th centuries, and from the 14th till the 17th centuries. The periods from the 6th till the middle of the 8th centuries, and from the middle 10th till the 14th centuries were characterized by colder temperature conditions. Similar results were obtained by oxygen stable isotope analysis, made from barnacle calcite. Oxygen isotopes undergo a temperature-dependent fractionation during calcification, such that increasing temperature results in a decreasing fractionation between 16O and 18O, which will produce a lower δ18O value. Isotope analysis was carried out according to standard techniques (Jones, Quitmyer, 1996; Hu et al., 2001) using a Thermo-Finnigan DELTA-V Plus mass spectrometer (IEE RAS, Moscow). The total number of analyzed samples and laboratory standard replicates ware 42 and 11, respectively. The results of isotope analysis allow us to ascertain the detailed climate dynamic from the 6th to the 17th centuries cal AD. Our results are well agreed with dendrochronological data from Russian Arctic (Hantemirov, Shiyatov, 2002). Therefore the marked climate changes were not local and characterized for entire Northern hemisphere. The study was supported by the Russian Foundation for Basic Research (project № 09-04-00196), National Science Foundation (OPP-0353065), the programs “Origin and Evolution of the Biosphere” and “Biodiversity and Gene Pool Dynamics” of the Russian Academy of Sciences.

We reconstructed dynamics of palaeoenvironmental conditions during the last millennium, based on analysis of invertebrates’ remains from archaeological site ADK-009 on Adak Island, Aleutian Islands. Radiocarbon analysis, made from fish bone collagen, showed that the cultural layers of the site ADK-009 was formed from the 6th to the 17th centuries cal AD. Zoogeographical analysis and oxygen stable isotope analysis, made from barnacle calcite, allow us to distinguish the different climatic periods during the existence of the ancient settlement. The warmer periods were observed from the middle of the 8th till the middle10th centuries, and from the 14th till the 17th centuries. The periods from the 6th till the middle of the 8th centuries, and from the middle 10th till the 14th centuries were characterized by colder temperature conditions. Our results are well agreed with dendrochronological data from Russian Arctic (Hantemirov, Shiyatov, 2002). Therefore the marked climate changes were not local and characterized for entire Northern hemisphere. The study was supported by the Russian Foundation for Basic Research (project № 09-04-00196), National Science Foundation (OPP-0353065), the programs “Origin and Evolution of the Biosphere” and “Biodiversity and Gene Pool Dynamics” of the Russian Academy of Sciences.

Authors:

ANTIPUSHINA Zhanna

Affiliations

A.N. Severtsov Institute of Ecology and Evolution RAS, Leninsky Pr., 33, Moscow, Russia, zh.antipushina@gmail.com

Creator

Antipushina, Zhanna

Date

August 2010

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Online Submission

No

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Citation

Antipushina, Zhanna. "Dynamics of palaeoenvironmental conditions over the last millenia by archaeomalacological data ," in BoneCommons, Item #933, http://alexandriaarchive.org/bonecommons/items/show/933 (accessed December 6, 2019).

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Creative Commons License

File: S3-4_28-08_ANTIPUSHINA.ppt