Detection and enrichment of ammonia oxidizers from permafrost soils of Siberia

Link:
Autor/in:
Beteiligte Personen:
  • Kane, Douglas L.
  • Hinkel, Kenneth M.
Verlag/Körperschaft:
Institute of Northern Engineering, University of Alaska Fairbanks
Erscheinungsjahr:
2008
Medientyp:
Text
Beschreibung:
  • Permafrost soils cover about a quarter of the Earth's land surface. The soils are continuously frozen throughout the year, and only the active layer thaws near the surface during the short vegetation period. Microbial life of the polygonal Siberian tundra is influenced by extreme gradients of temperature and moisture. During nitrification, ammonia is oxidized by chemolithoautotrophic nitrifiers, the ammonia (AOB) and nitrite oxidizers (NOB), in two steps via nitrite to nitrate. Cell numbers of nitrifiers and potential activities of AOB were determined in geochemical characterized soil samples of the active layers. Results obtained by MPN-counts showed clearly that higher cell numbers of AOB and activities were found in the upper part of the dryer polygon rims compared to the waterlogged polygon centres. Our results reveal the existence of AOB in permafrost soil, which are well-adapted to the extreme environment.
Lizenz:
  • info:eu-repo/semantics/restrictedAccess
Quellsystem:
Forschungsinformationssystem der UHH

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oai:www.edit.fis.uni-hamburg.de:publications/cc5d9163-3b16-40b0-9e66-01000043a0a0