Microform-related community patterns of methane-cycling microbes in boreal Sphagnum bogs are site specific
| Autor: | Hannu Fritze, Eeva-Stiina Tuittila, Devin Robinson, Mirkka Kotiaho, Heli Juottonen, Päivi Merilä |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Peat
Methanotroph Wetland Euryarchaeota Applied Microbiology and Biotechnology Microbiology Sphagnum Sphagnopsida Bog Soil Microbiology geography geography.geographical_feature_category Ecology biology Denaturing Gradient Gel Electrophoresis Vegetation DNA Restriction Enzymes 15. Life on land biology.organism_classification 6. Clean water Boreal 13. Climate action Wetlands Methane Methylocystaceae Oxidation-Reduction Polymorphism Restriction Fragment Length |
| Zdroj: | FEMS microbiology ecology. 91(9) |
| ISSN: | 1574-6941 |
| Popis: | Vegetation and water table are important regulators of methane emission in peatlands. Microform variation encompasses these factors in small-scale topographic gradients of dry hummocks, intermediate lawns and wet hollows. We examined methane production and oxidization among microforms in four boreal bogs that showed more variation of vegetation within a bog with microform than between the bogs. Potential methane production was low and differed among bogs but not consistently with microform. Methane oxidation followed water table position with microform, showing higher rates closer to surface in lawns and hollows than in hummocks. Methanogen community, analysed by mcrA terminal restriction fragment length polymorphism and dominated by Methanoregulaceae or 'Methanoflorentaceae', varied strongly with bog. The extent of microform-related variation of methanogens depended on the bog. Methanotrophs identified as Methylocystis spp. in pmoA denaturing gradient gel electrophoresis similarly showed effect of bog, and microform patterns were stronger within individual bogs. Our results suggest that methane-cycling microbes in boreal Sphagnum bogs with seemingly uniform environmental conditions may show strong site-dependent variation. The bog-intrinsic factor may be related to carbon availability but contrary to expectations appears to be unrelated to current surface vegetation, calling attention to the origin of carbon substrates for microbes in bogs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|