Water addition regulates the metabolic activity of ammonia oxidizers responding to environmental perturbations in dry subhumid ecosystems
文献类型：期刊论文
| 作者 | Singh, Brajesh K.; Holmes, Bronwyn; He, Ji-Zheng; Bodrossy, Levente; Hu, Hang-Wei; Macdonald, Catriona A.; Trivedi, Pankaj |
| 刊名 | ENVIRONMENTAL MICROBIOLOGY
 |
| 出版日期 | 2015-02 |
| 卷号 | 17期号:2页码:444-461 |
| 英文摘要 | Terrestrial arid and semi-arid ecosystems (drylands) constitute about 41% of the Earth's land surface and are predicted to experience increasing fluctuations in water and nitrogen availability. Mounting evidence has confirmed the significant importance of ammonia-oxidizing archaea (AOA) and bacteria (AOB) in nitrification, plant nitrogen availability and atmospheric N2O emissions, but their responses to environmental perturbations in drylands remain largely unknown. Here we evaluate how the factorial combinations of irrigation and fertilization in forests and land-use change from grassland to forest affects the dynamics of AOA and AOB following a 6-year dryland field study. Potential nitrification rates and AOA and AOB abundances were significantly higher in the irrigated plots, accompanied by considerable changes in community compositions, but their responses to fertilization alone were not significant. DNA-stable isotope probing results showed increased (CO2)-C-13 incorporation into the amoA gene of AOA, but not of AOB, in plots receiving water addition, coupled with significantly higher net mineralization and nitrification rates. High-throughput microarray analysis revealed that active AOA assemblages belonging to Nitrosopumilus and Nitrosotalea were increasingly labelled by (CO2)-C-13 following irrigation. However, no obvious effects of land-use changes on nitrification rates or metabolic activity of AOA and AOB could be observed under dry conditions. We provide evidence that water addition had more important roles than nitrogen fertilization in influencing the autotrophic nitrification in dryland ecosystems, and AOA are increasingly involved in ammonia oxidation when dry soils become wetted. |
| WOS研究方向 | Microbiology |
| WOS记录号 | WOS:000350546200013 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32906]  |
| 专题 | 生态环境研究中心_土壤环境科学实验室 |
| 推荐引用方式 GB/T 7714 | Singh, Brajesh K.,Holmes, Bronwyn,He, Ji-Zheng,et al. Water addition regulates the metabolic activity of ammonia oxidizers responding to environmental perturbations in dry subhumid ecosystems[J]. ENVIRONMENTAL MICROBIOLOGY,2015,17(2):444-461. |
| APA | Singh, Brajesh K..,Holmes, Bronwyn.,He, Ji-Zheng.,Bodrossy, Levente.,Hu, Hang-Wei.,...&Trivedi, Pankaj.(2015).Water addition regulates the metabolic activity of ammonia oxidizers responding to environmental perturbations in dry subhumid ecosystems.ENVIRONMENTAL MICROBIOLOGY,17(2),444-461. |
| MLA | Singh, Brajesh K.,et al."Water addition regulates the metabolic activity of ammonia oxidizers responding to environmental perturbations in dry subhumid ecosystems".ENVIRONMENTAL MICROBIOLOGY 17.2(2015):444-461. |
入库方式： OAI收割
来源：生态环境研究中心
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