| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1016/j.soilbio.2013.01.025 |
| Seasonal variation in functional properties of microbial communities in beech forest soil. | |
| Koranda M; Kaiser C; Fuchslueger L; Kitzler B; Sessitsch A; Zechmeister-Boltenstern S; Richter A | |
| 发表日期 | 2013 |
| 出处 | Soil Biology and Biochemistry : 95-104 |
| 出版年 | 2013 |
| 语种 | 英语 |
| 摘要 | Substrate quality and the availability of nutrients are major factors controlling microbial decomposition processes in soils. Seasonal alteration in resource availability, which is driven by plants via belowground C allocation, nutrient uptake and litter fall, also exerts effects on soil microbial community composition. Here we investigate if seasonal and experimentally induced changes in microbial community composition lead to alterations in functional properties of microbial communities and thus microbial processes. Beech forest soils characterized by three distinct microbial communities (winter and summer community, and summer community from a tree girdling plot, in which belowground carbon allocation was interrupted) were incubated with different 13C-labeled substrates with or without inorganic N supply and analyzed for substrate use and various microbial processes. Our results clearly demonstrate that the three investigated microbial communities differed in their functional response to addition of various substrates. The winter communities revealed a higher capacity for degradation of complex C substrates (cellulose, plant cell walls) than the summer communities, indicated by enhanced cellulase activities and reduced mineralization of soil organic matter. In contrast, utilization of labile C sources (glucose) was lower in winter than in summer, demonstrating that summer and winter community were adapted to the availability of different substrates. The saprotrophic community established in girdled plots exhibited a significantly higher utilization of complex C substrates than the more plant root associated community in control plots if additional nitrogen was provided. In this study we were able to demonstrate experimentally that variation in resource availability as well as seasonality in temperate forest soils cause a seasonal variation in functional properties of soil microorganisms, which is due to shifts in community structure and physiological adaptations of microbial communities to altered resource supply. |
| 主题 | Evolution and Ecology (EEP) ; Postdoctoral Scholars (PDS) |
| 关键词 | C and N availability Extracellular enzyme activities Microbial community composition Microbial processes PLFA Priming effect Respiration Carbon use efficiency |
| URL | http://pure.iiasa.ac.at/id/eprint/10491/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/129802 |
| 推荐引用方式 GB/T 7714 | Koranda M,Kaiser C,Fuchslueger L,et al. Seasonal variation in functional properties of microbial communities in beech forest soil.. 2013. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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