|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
Wildfires as a driver for Mid- and Late Holocene vegetation dynamics in the Central European Russiaтезисы доклада Тезисы
- Авторы: Novenko Elena Yu, Mazei Natali G., Kupryanov Dmitry A., Shatunov Anton E.
- Сборник: Landscape Science and Landscape Ecology:Considering Responses to Global Challenges. 1 st International IALE-Russia online conference Moscow 14-18 September 2020 Book of Abstracts
- Тезисы
- Год издания: 2020
- Место издания: Lomonosov Moscow State University Moscow
- Первая страница: 69
- Аннотация: Wildfires were of the most important phenomena in the forest vegetation zone of European Russia through the Holocene. New multi-proxy records of environmental changes from four key areas, located in different landscapes: southern part of Valdai Upland (south taiga), Meshchera lowlands and Mordovia State Natural Reserve (mixed coniferous-broadleaf forests) and MidRussian Upland (broadleaf forests) are presented. Palaeoecological analyses of peat cores forpollen, charcoal, peat humification, plant macrofossils and testate amoebae with dating usingradiocarbon have shown that fire frequency affected significantly on the Holocene vegetationdynamics. According to obtained results, the beginning of human occupation of the areas is clearly marked by increased fire activity. Medieval time (at about 1000 cal yr BP) and Modern Period (the last 300 years) were marked by high fire frequencies all over the East European Plain. In the model area, located in the Meshchera lowlands and Mid-Russian Upland a significant increase in fire frequency was revealed around 2000 cal yr BP (Early Iron Age) and highest concentrations of micro- and microcharcoal were recorded for the last millennium, frequency of fires reached 8 fires per 1000 years. However, periods of increased fire activity occurred prior to the occupation of these areas by human. The highest frequency of fire in all model areas was determined for the periods 9000-6000 cal yr BP and 3500 – 2500 cal yr BP. Fire-free interval ranged from 15- 20 to 120 years. According to data available, the influence of anthropogenic factor during these time intervals was low. Archeological findings is rare in vicinity of the peat cores and no pollen or plant macrofossil indicators of human impact were detected. Evidently forest fires were coursed by climatic reason. The regional climatic reconstruction inferred from pollen and testate amoebae data these periods revealed high temperatures and dry summer conditions.
- Добавил в систему: Куприянов Дмитрий Александрович