42163

Автор(ы): 

Автор(ов): 

5

Параметры публикации

Тип публикации: 

Тезисы доклада

Название: 

Microflora from samples of relict ice wedges of Mammoth Mountain (Central Yakutia)

Наименование конференции: 

  • 11th annual meeting of the Asia Oceania Geosciences Society (AOGS-2014, Sapporo, Japan)

Наименование источника: 

  • Proceedings of 11th annual meeting of the Asia Oceania Geosciences Society (AOGS-2014, Sapporo, Japan)

Город: 

  • Sapporo, Japan

Издательство: 

  • AOGS

Год издания: 

2014

Страницы: 

106
Аннотация
This paper presents the results of a study of microbial associations in samples of relict ice wedges of the Mammoth Mountain. Mammoth Mountain Ice complex is located on the left bank of the Aldan River in the Central Yakutia. Neogene- Pleistocene alluvial sand sediments aged from about12 million to several thousand years are exposed there. Ice wedges are formed as a result of repeated cycles of frost cracking and filling cracks with water and organic and mineral particles. Shape of the ice wedges is an evidence of absence of thawing during the time of their existence, and variety of microorganisms and bacteriophages have survived in this environment. A number of colony forming units (CFU) of heterotrophic aerobic bacteria have been identified, some of them are similar to microorganisms found previously in frozen ground and ice in the Arctic, and they vary within the 103 – 106 CFU / ml. Corynebacteria is one of the dominant forms. Electron microscopy of the thawed material from ice wedges has shown presence of virus particles of different morphologies. Filamentous bacteriophages have been found in negative sites in the zone of active growth of spore-forming bacteria. Detection of virus particles in samples of relict ice wedges have probably became possible due to the induction of phages of lysogenic microorganisms during thawing. At the same time we can not exclude the possibility of virus adsorption on particles of relict dust at the time of the ice formation, therefore the viruses can be relict.

Библиографическая ссылка: 

Карнышева Э.А., Брушков А.В., Филиппова С.Н., Сургучева Н.А., Гальченко В.Ф. Microflora from samples of relict ice wedges of Mammoth Mountain (Central Yakutia) / Proceedings of 11th annual meeting of the Asia Oceania Geosciences Society (AOGS-2014, Sapporo, Japan). Sapporo, Japan: AOGS, 2014. С. 106.