Response of ammonia oxidation activities to water-level fluctuations in riparian zones in a column experiment
文献类型：期刊论文
| 作者 | Li, Siling; Gang, Diga; Zhao, Shuangju; Qi, Weixiao ; Liu, Huijuan
|
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2021-04 |
| 卷号 | 269页码:- |
| 关键词 | Water-level fluctuations Ammonia oxidation Riparian zone Column experiment |
| ISSN号 | 0045-6535 |
| 英文摘要 | Biogeochemical hotspots of nitrogen cycling such as ammonia oxidation commonly occur in riparian ecosystems. However, the responses of ammonia-oxidizing archaea (AOA) and bacteria (AOB) to water-level fluctuations (WLF) in riparian zones remain unclear. In this study, two patterns of WLF (gradual waterlogging and drying) were investigated in a 9-month column experiment, and the abundances and activities of AOA and AOB were investigated. The recovery evaluation revealed AOB abundance had not returned to the initial level at the end of the experiment, while AOA abundance had recovered nearly completely. AOA outnumbered AOB at almost all depths, and AOA showed higher resistance and adaptation to WLF than AOB. However, higher microbial abundance was not always linked to the larger contribution to nitrification. Changes in environmental parameters such as moisture and dissolved oxygen caused by WLF instead of ammonia-oxidizing microorganism (AOM) abundance might play a key role in regulating the expression of amoA gene and thus the activity of ammonia oxidizers. In addition, the community structure of AOM evolved over the incubation period. The composition of AOA species in sediment changed in the same way as that in soil, and the Nitrosopumilus cluster showed strong resistance to WLF. Conversely, waterlogging changed the community structure of AOB in soil while drying had no significant effect on the AOB community structure in sediment. This study suggests that the ammonia oxidizers will respond to WLF and eventually affect N fate in riparian ecosystems considering the coupling with other N transformation processes. (C) 2020 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46261]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 2.Tsinghua Univ, Ctr Water & Ecol, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Siling,Gang, Diga,Zhao, Shuangju,et al. Response of ammonia oxidation activities to water-level fluctuations in riparian zones in a column experiment[J]. CHEMOSPHERE,2021,269:-. |
| APA | Li, Siling,Gang, Diga,Zhao, Shuangju,Qi, Weixiao,&Liu, Huijuan.(2021).Response of ammonia oxidation activities to water-level fluctuations in riparian zones in a column experiment.CHEMOSPHERE,269,-. |
| MLA | Li, Siling,et al."Response of ammonia oxidation activities to water-level fluctuations in riparian zones in a column experiment".CHEMOSPHERE 269(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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