Methanotrophic bacteria in boreal forest soil after fire

  • Jaatinen K
  • Knief C
  • Dunfield P
 et al. 
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Abstract

Methane-oxidizing bacteria are the only terrestrial sink for atmospheric
methane. Little is known, however, about the methane-oxidizing bacteria
that are responsible for the consumption of atmospheric methane, or
about the factors that influence their activity and diversity in soil.
Effects of fire and its end-product, wood ash, on the activity and
community of methane oxidizing bacteria were studied in boreal forest 3
months and 12 years after the treatments. Fire significantly increased
the atmospheric CH(4) oxidation rate. Both fire and wood ash treatments
resulted in increased soil pH, but there was no correlation with methane
oxidation rates. Changes in the methane-oxidizing bacterial community
due to treatments were not detected by cultivation-independent recovery
and comparative sequence analysis of pmoA gene products from soil.
Phylogenetic analysis showed that a majority of the pmoA sequences
obtained belonged to the ``upland soil cluster alpha{''}, which has
previously been detected in diverse forest environments. (C) 2004
Federation of European Microbiological Societies. Published by Elsevier
B.V. All rights reserved.

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Authors

  • K Jaatinen

  • C Knief

  • P F Dunfield

  • K Yrjala

  • H Fritze

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