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- Title
Physicochemical and biological factors affecting atmospheric methane oxidation in gray forest soils.
- Authors
Kravchenko, I. K.; Semenov, V. M.; Kuznetsova, T. V.; Bykova, S. A.; Dulov, L. E.; Pardini, D.; Gispert, M.; Boeckx, P.; Van Cleemput, O.; Gal'chenko, V. F.
- Abstract
The decline of methane oxidizing activities in gray forest soil upon its conversion into arable land was shown to be caused by major changes in biotic and physicochemical properties of soil. Using the method of immune serums, methane-oxidizing bacteria were detected in both forest and agricultural soils, but their populations differed significantly in both abundance and composition. In the forest soil, the number of methanotrophs was an order of magnitude higher than in arable soil, amounting to 3.5 × 108 and 0.24 × 108 cells/g soil, respectively. All methane-oxidizing bacteria identified in the forest soil belonged to the genus Methylocystis, and 94% of these were represented by a single species, M. parvus. The arable soil was dominated by type I methanotrophs ( Methylobacter and Methylomonas, 67.6%), occurring along with bacteria of the genus Methylocystis. In addition, arable soil is characterized by a low content of microbial biomass, lower porosity and water resistance of soil aggregates, and the predominance of nitrogen mineralization processes over those of nitrogen immobilization. These factors can also contribute to lower rates of methane oxidation in arable soil as compared to forest soil.
- Subjects
METHANE; OXIDATION; FOREST soils; BACTERIA; IMMUNE serums; NITROGEN
- Publication
Microbiology (00262617), 2005, Vol 74, Issue 2, p216
- ISSN
0026-2617
- Publication type
Academic Journal
- DOI
10.1007/s11021-005-0054-3