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A comparison of patterns of microbial C : N : P stoichiometry between topsoil and subsoil along an aridity gradient

文献类型：期刊论文

作者Liu, Yuqing4; Ma, Wenhong3; Kou, Dan4; Niu, Xiaxia3,4; Wang, Tian2,4; Chen, Yongliang1; Chen, Dima4; Zhu, Xiaoqin4; Zhao, Mengying2,4; Hao, Baihui3,4
刊名BIOGEOSCIENCES
出版日期2020
卷号17期号:7页码:2009-2019
ISSN号1726-4170
DOI10.5194/bg-17-2009-2020
文献子类Article
英文摘要Microbial stoichiometry and its potential driving factors play crucial roles in understanding the balance of chemical elements in ecological interactions and nutrient limitations along the aridity gradient. However, little is known about the variation in these features along the aridity gradient due to the lack of comprehensive field investigations. Additionally, previous studies focused on the topsoil (0-10 or 0-20 cm); however, the minimum sampling depth for topsoil could impact the results of the vertical distribution of microbial stoichiometry. In the present study, we measured the variation in microbial stoichiometry, examined the major influential factors (climatic, edaphic, and biotic factors) along an aridity gradient, and determined whether the sampling depth affected microbial C : N: P stoichiometry. From the topsoil to the subsoil, the microbial C: N, C : P, and N: P ratios varied from 6.59 to 6.83, from 60.2 to 60.5, and from 9.29 to 8.91, respectively. Only the microbial C : N ratio significantly increased with soil depth. The microbial C : N ratio significantly increased with increasing aridity in both topsoil and subsoil, while the microbial N: P ratio decreased along the aridity gradient only for the topsoil. This result implied that drought-stimulated microbes tend to be more N conservative, especially those in topsoil. Among all the factors, the soil organic carbon (SOC) content and the fungi-to-bacteria ratio exerted the largest influence on the microbial C: N, C : P, and N: P ratios at both soil depths, implying that the substrate supply and microbial structure together controlled the microbial stoichiometry. The results also revealed that the aridity index (AI) and plant aboveground biomass (AGB) exerted negative impacts on the microbial C : N ratio at both soil depths, and the effects of AI decreased in the subsoil. The results of this study suggested that the flexibility of the microbial N: P ratio should be considered when establishing the sampling depth for microbial stoichiometry study.
学科主题Ecology ; Geosciences, Multidisciplinary
出版地GOTTINGEN
电子版国际标准刊号1726-4189
WOS关键词SOIL DEPTH ; ELEMENTAL STOICHIOMETRY ; FUMIGATION-EXTRACTION ; NUTRIENT LIMITATION ; CLIMATIC TRANSECT ; CNP STOICHIOMETRY ; GLOBAL PATTERNS ; BIOMASS C ; NITROGEN ; TERRESTRIAL
WOS研究方向Environmental Sciences & Ecology ; Geology
语种英语
WOS记录号WOS:000526058800002
出版者COPERNICUS GESELLSCHAFT MBH
资助机构National Basic Research Program of ChinaNational Basic Research Program of China [2015CB954201, 2014CB954303] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31470498]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/21808]  
专题植被与环境变化国家重点实验室
作者单位1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
2.Inner Mongolia Univ, Sch Ecol & Environm, Dept Ecol, Hohhot 010021, Peoples R China
3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
4.Nanjing Normal Univ, Sch Geog Sci, Nanjing 210023, Peoples R China
5.China Agr Univ, Coll Resources & Environm Sci, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Yuqing,Ma, Wenhong,Kou, Dan,et al. A comparison of patterns of microbial C : N : P stoichiometry between topsoil and subsoil along an aridity gradient[J]. BIOGEOSCIENCES,2020,17(7):2009-2019.
APA Liu, Yuqing.,Ma, Wenhong.,Kou, Dan.,Niu, Xiaxia.,Wang, Tian.,...&Hu, Huifeng.(2020).A comparison of patterns of microbial C : N : P stoichiometry between topsoil and subsoil along an aridity gradient.BIOGEOSCIENCES,17(7),2009-2019.
MLA Liu, Yuqing,et al."A comparison of patterns of microbial C : N : P stoichiometry between topsoil and subsoil along an aridity gradient".BIOGEOSCIENCES 17.7(2020):2009-2019.

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来源：植物研究所

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