The paper presents carbon and nitrogen stable isotopes data for the mammal bone remains from excavation of the site Ostrov Listvenichnyi (Point 2) (Northern Angara region). Early and Middle Holocene layers of this site demonstrate the shift from pre-pottery Mesolithic to Neolithic industry. Stable isotopes studies can help to understand the scale of paleoenvironmental changing in that process. The main problem on this way is the completeness of data in Northern Angara region. Because of it, current study exploits previous stable isotopes evidences of the multilayered Ust-Keul 1 site and the results of AMS-dating in addition to analyses of mammal remains of the site Ostrov Listvenichnyi (Point 2). There are Cervus elaphus, Capreolus pygargus, Alces americanus, Canis familiaris, Ursus arctos in the sample. The species composition of the fauna and the ratio of carbon and nitrogen stable isotopes in the bone remains indicate the dominance of the forest (taiga) landscape. Further carbon and nitrogen stable isotopes composition of Northern Angara is compared with the data of Baikal Archaeological Project. The last one consists of Early and Middle Holocene Kitoi isotope materials and isotope investigations of modern mammals in Baikal region. The comparison demonstrates that the most of indicators of the Northern Angara Holocene are included in the isotope variation of the South Angara region analogues. But the data also illustrates exceptions such as Alces americanus and Ursus arctos isotope ratios. Nitrogen isotope level of that mammal remains in Holocene is significantly more than in modern ones. That phenomenon may be caused by season/age climate fluctuation resulting in water or food stress. Thus analyses of carbon and nitrogen stable isotopes data of the site Ostrov Listvenichnyi (Point 2) demonstrate that there is no obvious evidence of correlation between paleoclimate changing and stable isotope composition in Early and Middle Holocene at least before the new investigation in Northern Angara region.

Kuznetsov Alexei Mikhailovich, Research Engineer, Irkutsk State University; 1, K. Marx st., Irkutsk, 664003, Russian Federation, e-mail: golos_siberia@list.ru 

Khubanovа Anna Mikhailovna, Junior Researcher, Geological Institute SB RAS; 6а, Sakhyanova st., Ulan-Ude, 670047, Russian Federation, e-mail: hubanova81@mail.ru 

Rogovskoi Evgenii Olegovich, Candidate of Sciences (History), Researcher, Irkutsk State University; 1, K. Marx st., Irkutsk, 664003, Russian Federation, e-mail: eor127@yandex.ru 

Klementiev Alexei Mikhailovich, Candidate of Sciences (Geography), Researcher, Institute of the Earth’s Crust SB RAS; 128, Lermontov st., Irkutsk, 664033, Russian Federation, e-mail: klem-al@yandex.ru 

Khubanov Valentin Borisovich, Candidate of Sciences (Geology and Mineralogy), Senior Researcher, Geological Institute SB RAS; 6а, Sakhyanova st., Ulan-Ude, 670047, Russian Federation; Senior Lecturer, Buryat State University; 24a, Smolin st., Ulan-Ude, 670000, Russian Federation, e-mail: khubanov@mail.ru 

Posokhov Victor Fedorovich, Senior Researcher, Geological Institute SB RAS; 6а, Sakhyanova st., Ulan-Ude, 670047, Russian Federation, e-mail: vitaf1@yandex.ru

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