| Schmidt, O; Horn, MA; Kolb, S; Drake, HL: Temperature Impacts Differentially on the Methanogenic Food Web of Cellulose-Supplemented Peatland Soil, Environmental Microbiology, 17(3), 720-734 (2015) | |
| Abstract: The impact of temperature on the largely unresolved intermediary ecosystem metabolism and associated unknown microbiota that link cellulose degradation and methane production in soils of a moderately acidic (pH 4.5) fen was investigated. Supplemental [13C]cellulose stimulated the accumulation of propionate, acetate, and carbon dioxide as well as initial methane production in anoxic peat soil slurries at 15°C and 5°C. Accumulation of organic acids at 15°C was twice as fast as that at 5°C. 16S rRNA [13C]cellulose stable isotope probing identified novel unclassified Bacteria (79% identity to the next cultured relative Fibrobacter succinogenes), unclassified Bacteroidetes (89% identity to Prolixibacter bellariivorans), Porphyromonadaceae, Acidobacteriaceae, and Ruminococcaceae as main anaerobic degraders of cellulose-derived carbon at both 15°C and 5°C. Holophagaceae and Spirochaetaceae were more abundant at 15°C. Clostridiaceae dominated the degradation of cellulose-derived carbon only at 5°C. Methanosarcina was the dominant methanogenic taxa at both 15°C and 5°C. Relative abundance of Methanocella increased at 15°C whereas that of Methanoregula and Methanosaeta increased at 5°C. Thaumarchaeota closely related to Nitrosotalea (presently not known to grow anaerobically) were abundant at 5°C but absent at 15°C indicating that Nitrosotalea sp. might be capable of anaerobic growth at low temperatures in peat. |
Aktuelle Termine
Aktuelle Termine
| BayCEER-Kolloquium: |
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| Do. 25.04.2024 Perspectives and challenges in the restoration and conservation of two isolated habitats: gypsum and cliffs |
| BayCEER Short Courses: |
| Mi. 24.04.2024 Mobile Film Making Workshop (for PhDs/PostDosc/Profs of BayCEER) |
| Fr. 26.04.2024 Mobile Film Making Workshop (for students of BayCEER) |
| Ökologisch-Botanischer Garten: |
| So. 21.04.2024 Führung | Den ÖBG kennenlernen: Allgemeine Gartenführung |
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