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Environmental factors, but not abundance and diversity of nitrifying microorganisms, explain sediment nitrification rates in Yangtze lakes

文献类型：期刊论文

作者Yao, Lu1,2,3; Chen, Chengrong1,3; Liu, Guihua2; Li, Feng4; Liu, Wenzhi2
刊名RSC ADVANCES
出版日期2018
卷号8期号:4页码:1875-1883
ISSN号2046-2069
DOI10.1039/c7ra11956a
英文摘要Sediment nitrification plays a vital role in nitrogen (N) biogeochemical cycling and ecological function of an aquatic ecosystem. The relative importance of environmental factors and nitrifying microbial communities in regulating sediment nitrification process has received less attention, especially in aquatic habitats where high N loads are frequently detected. Here, we report the potential nitrification rates of 35 sediment samples from 10 shallow lakes in the Yangtze River basin. The diversity and abundance of ammonia-oxidizing archaea (AOA) and bacteria (AOB) were quantified using archaeal and bacterial amoA genes. The results showed that there was no significant difference in sediment nitrification rates among sites of different trophic state. The nitrification rates were positively related to water chlorophyll-a, sediment N and carbon levels, but not significantly associated with diversity and abundance of ammonia-oxidizing microorganisms and submerged plants. Interestingly, the abundance and diversity of sediment AOB but not AOA communities were significantly influenced by trophic state. In addition, AOB communities were more sensitive to changes in local environments and catchment land uses than the AOA communities. Using path analysis, we found that 55-60% of the indirect effect of catchment land uses on nitrification rates was mediated via sediment N content. Our findings suggest that, although nitrification is a microbial process, variation in sediment nitrification rates in Yangtze lakes is mainly explained by abiotic factors but not by microbial abundance and diversity.
资助项目National Natural Science Foundation of China[31570535] ; National Natural Science Foundation of China[31400327]
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000422863900021
出版者ROYAL SOC CHEMISTRY
源URL[http://202.127.146.157/handle/2RYDP1HH/3761]  
专题中国科学院武汉植物园
通讯作者Liu, Wenzhi
作者单位1.Griffith Univ, Australian Rivers Inst, Nathan, Qld 4111, Australia
2.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Lumo Rd 1, Wuhan 430074, Hubei, Peoples R China
3.Griffith Univ, Griffith Sch Environm, Nathan, Qld 4111, Australia
4.Chinese Acad Sci, Inst Subtrop Agr, Dongting Lake Stn Wetland Ecosyst Res, Changsha 410125, Hunan, Peoples R China
推荐引用方式
GB/T 7714		 Yao, Lu,Chen, Chengrong,Liu, Guihua,et al. Environmental factors, but not abundance and diversity of nitrifying microorganisms, explain sediment nitrification rates in Yangtze lakes[J]. RSC ADVANCES,2018,8(4):1875-1883.
APA Yao, Lu,Chen, Chengrong,Liu, Guihua,Li, Feng,&Liu, Wenzhi.(2018).Environmental factors, but not abundance and diversity of nitrifying microorganisms, explain sediment nitrification rates in Yangtze lakes.RSC ADVANCES,8(4),1875-1883.
MLA Yao, Lu,et al."Environmental factors, but not abundance and diversity of nitrifying microorganisms, explain sediment nitrification rates in Yangtze lakes".RSC ADVANCES 8.4(2018):1875-1883.

入库方式： OAI收割

来源：武汉植物园

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