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Disentangling the effects of nitrogen availability and soil acidification on microbial taxa and soil carbon dynamics in natural grasslands

文献类型：期刊论文

作者Xing, Wen; Lu, Xiaoming; Ying, Jiaoyan; Lan, Zhichun; Chen, Dima1; Bai, Yongfei3
刊名SOIL BIOLOGY & BIOCHEMISTRY
出版日期2022
卷号164
ISSN号0038-0717
关键词Nitrogen enrichment Nitrogen availability Soil acidification Ecological category Bacterial and fungal taxa Soil carbon chemistry Mild vs strong microbial C limitation
DOI10.1016/j.soilbio.2021.108495
文献子类Article
英文摘要Although nitrogen (N) enrichment enhances both soil N availability and soil acidification, it is difficult to isolate their effects on microbial taxa that drive the soil carbon (C) dynamics under different microbial C limitation conditions in natural ecosystems. Based on long-term field N addition, field acid addition, and laboratory incubation experiments in the Inner Mongolian grassland, we disentangled the effects of increased N availability and soil acidification on relative abundance of bacterial and fungal taxa under the mild (soil incubation for 28 days) and strong microbial C limitations (soil incubation for 191 days). Bacterial and fungal taxa are grouped into four ecological categories (N sensitive, acid sensitive, N and acid sensitive, N and acid insensitive) with multiple levels of N addition. In the context of the mild microbial C limitation, increased N availability promoted the relative abundance of the fungal class Eurotiomycetes (N positive sensitivity) under the low-medium levels of N addition, with an associated decrease in soil labile carbonyl C content. Conversely, increased N availability reduced the relative abundance of fungal class Sordariomycetes (N negative sensitivity) and bacterial gene copies (N and acid negative sensitivity) under the high levels of N addition, with associated increases in labile O-alkyl C and di-O-alkyl C content, making soil C more labile. In the context of the strong microbial C limitation, increased soil acidification promoted the abundance of acidophilous fungal classes Sordariomycetes and Eurotiomycetes under the low-medium levels of N addition, with an associated decrease in soil labile carbonyl C content. However, increased N availability promoted the relative abundance of the bacterial phylum Thaumarchaeota (N positive sensitivity equal to acid negative sensitivity), with associated low labile O-alkyl C and di-O-alkyl C content, leaving C chemistry more resistant. By applying the ecological category concept to soil microbes, our findings highlight that the N enrichment-induced shifts in abundance of N- and/or acid-sensitive categories are tightly associated with the changes in soil organic carbon (SOC) chemical composition, and the relationship between microbial function groups and SOC chemistry varied substantially under the mild versus strong microbial C limitations.
学科主题Soil Science
电子版国际标准刊号1879-3428
出版地OXFORD
WOS关键词COMMUNITY STRUCTURE ; BACTERIAL COMMUNITIES ; RESPONSES ; PH ; INPUTS ; FERTILIZATION ; DECOMPOSITION ; ENRICHMENT ; DIVERSITY ; PATTERNS
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000724163700001
资助机构Strategic Priority Research Program of Chinese Academy of Sciences [XDA23080000] ; National Natural Science Foundation of China [31630010]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/28902]  
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
3.China Three Gorges Univ, Coll Biol & Pharmaceut Sci, Yichang, Peoples R China
推荐引用方式
GB/T 7714		 Xing, Wen,Lu, Xiaoming,Ying, Jiaoyan,et al. Disentangling the effects of nitrogen availability and soil acidification on microbial taxa and soil carbon dynamics in natural grasslands[J]. SOIL BIOLOGY & BIOCHEMISTRY,2022,164.
APA Xing, Wen,Lu, Xiaoming,Ying, Jiaoyan,Lan, Zhichun,Chen, Dima,&Bai, Yongfei.(2022).Disentangling the effects of nitrogen availability and soil acidification on microbial taxa and soil carbon dynamics in natural grasslands.SOIL BIOLOGY & BIOCHEMISTRY,164.
MLA Xing, Wen,et al."Disentangling the effects of nitrogen availability and soil acidification on microbial taxa and soil carbon dynamics in natural grasslands".SOIL BIOLOGY & BIOCHEMISTRY 164(2022).

入库方式： OAI收割

来源：植物研究所

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