中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 武汉植物园
  3. 中国科学院武汉植物园
Seeking the hotspots of nitrogen removal: A comparison of sediment denitrification rate and denitrifier abundance among wetland types with different hydrological conditions

文献类型：期刊论文

作者Deng, Danli1,5; Pan, Yongtai2; Liu, Guihua1,3,4; Liu, Wenzhi1,3,4; Ma, Lin1,4
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2020-10-01
卷号737页码:11
关键词Denitrifier abundance Denitrificanon rates Hydrological condition Scaling analysis Functional relationship
ISSN号0048-9697
DOI10.1016/j.scitotenv.2020.140253
英文摘要Wetlands play a vital role in removing nitrogen (N) from aquatic environments via the denitrification process, which is regulated by multiple environmental and biological factors. Until now, the mechanisms by which environmental factors and microbial abundance regulate denitrification rates in wetlands under different hydrological conditions remain poorly understood. Here, we investigated sediment potential denitrification rate (PDR) and unamended denitrification rate (UDR), and quantified denitrifier abundance (nirS, nirK, and nosZ genes) in 36 stream river, pond, and ditch wetland sites along the Dan River, a nitrogen-rich river in central China. The result indicated that ditches had the highest denitrification rates and denitrifier abundance. Both PDR and UDR showed strong seasonality, and were observed to be negatively correlated with water velocity in streams and rivers. Moreover, denitrification rates were significantly related to denitrifier abundance and many water quality parameters and sediment properties. Interestingly, PDR and UDR were generally positively associated with N and carbon (C) availability in streams and rivers, but such correlations were not found in ponds and ditches. Using a scaling analysis, we found that environmental parameters, including Reynolds number, sediment total C ratio, and interstitial space, coupled with relative nirS gene abundance could predict the hotspots of denitrification rates in wetlands with varying hydrologic regimes. Our findings highlight that hydrological conditions, especially water velocity and hydrologic pulsing, play a nonnegligible role in determining N biogeochemical processes in wetlands. (C) 2020 Elsevier B.V. All rights reserved.
资助项目National Natural Science Foundation of China[51709255] ; CRSRI Open Research Program[CKWV2019769/KY] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2017388]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000553716900003
出版者ELSEVIER
源URL[http://202.127.146.157/handle/2RYDP1HH/15532]  
专题中国科学院武汉植物园
通讯作者Liu, Wenzhi; Ma, Lin
作者单位1.Chinese Acad Sci, CAS Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Peoples R China
2.Tibet Univ, Res Ctr Ecol & Environm Qinghai Tibetan Plateau, Lhasa 850000, Peoples R China
3.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Wuhan 430074, Peoples R China
4.Chinese Acad Sci, Hubei Key Lab Wetland Evolut & Ecol Restorat, Wuhan Bot Garden, Wuhan 430074, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Deng, Danli,Pan, Yongtai,Liu, Guihua,et al. Seeking the hotspots of nitrogen removal: A comparison of sediment denitrification rate and denitrifier abundance among wetland types with different hydrological conditions[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,737:11.
APA Deng, Danli,Pan, Yongtai,Liu, Guihua,Liu, Wenzhi,&Ma, Lin.(2020).Seeking the hotspots of nitrogen removal: A comparison of sediment denitrification rate and denitrifier abundance among wetland types with different hydrological conditions.SCIENCE OF THE TOTAL ENVIRONMENT,737,11.
MLA Deng, Danli,et al."Seeking the hotspots of nitrogen removal: A comparison of sediment denitrification rate and denitrifier abundance among wetland types with different hydrological conditions".SCIENCE OF THE TOTAL ENVIRONMENT 737(2020):11.

入库方式： OAI收割

来源：武汉植物园

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。