A novel extracellular enzyme stoichiometry method to evaluate soil heavy metal contamination: Evidence derived from microbial metabolic limitation

doi:10.1016/j.scitotenv.2020.139709

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	A novel extracellular enzyme stoichiometry method to evaluate soil heavy metal contamination: Evidence derived from microbial metabolic limitation
	Wang, Xia 1,3; Cui, Yongxing 1,3; Zhang, Xingchang 3; Ju, Wenliang 1,3; Duan, Chengjiao 1,3; Wang, Yunqiang 2,4,5; Fang, Linchuan 2,3
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020-10-10
卷号	738 页码:11
关键词	Soil heavy metals Microbial metabolism Soil C turnover Biological indicators
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2020.139709
通讯作者	Fang, Linchuan(flinc629@hotmail.com)
英文摘要	Heavy metal contaminates have become a significant threat to soil ecosystems due to their chronicity and universality in soil. Soil microbial metabolism plays a vital role in biogeochemical cycles and soil functions. However, the response of microbial metabolism to heavy metal contamination in soil remains elusive despite potentially offering important insight into the health and ecological consequences of soil ecosystems under such contamination. This study used extracellular enzyme stoichiometry models to identify the response of microbial metabolism to various heavy metal contaminants, while also revealing potential implications of heavy metal contaminates in soil ecosystems. Results showed that microbial metabolism was restricted by soil carbon (C) and phosphorus (P) within a heavy metal polluted area in Northwest China. Heavy metal stress significantly increased microbial C limitation while decreasing microbial P limitation. However, microbial C and P limitations both responded consistently to different heavy metals (i.e., Cd, Pb, Zn, and Cu). Heavy metals had the greatest effect on microbial C limitation (i.e., 0.720 of the total effects) compared to other soil properties, and soil with the lowest heavy metal concentration exhibited the lowest microbial C limitation, and vice versa. These results indicated that microbial metabolic limitation can robustly and sensitively reflect the degree of heavy metals pollution in soil. Additionally, increased microbial C limitation caused by heavy metal contaminants could potentially escalate C release by promoting soil C decomposition as well as increasing investments in enzyme production and the maintenance of metabolic processes. Consequently, potential C loss induced by heavy metal pollution on soil eco-systems may be extensive and significant. Generally, our results suggest the usefulness of extracellular enzyme stoichiometry as a new method from which to evaluate heavy metal soil pollution, while microbial metabolic limitation could potentially be a promising indicator. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDB40020202] ; National Natural Science Foundation of China[41977031] ; CAS Light of West China Program[XAB2016A03] ; Program of the State Key Laboratory of Loess and Quaternary Geology, CAS[SKLLQGZR1803] ; State Key Research & Development Plan Project[2017YFC0504504]
WOS关键词	CARBON-USE EFFICIENCY ; ECOENZYMATIC STOICHIOMETRY ; FUNCTIONAL DIVERSITY ; NUTRIENT LIMITATION ; PLANT-GROWTH ; WASTE-WATER ; POLLUTION ; ZN ; RHIZOSPHERE ; COMMUNITY
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000560045000008
资助机构	Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; CAS Light of West China Program ; Program of the State Key Laboratory of Loess and Quaternary Geology, CAS ; State Key Research & Development Plan Project
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/15159]
专题	第四纪科学与全球变化卓越创新中心地球环境研究所_生态环境研究室
通讯作者	Fang, Linchuan
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 3.Inst Soil & Water Conservat CAS & MWR, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 4.Xi An Jiao Tong Univ, Dept Earth & Environm Sci, Xian 710049, Peoples R China 5.Inst Earth Environm CAS, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xia,Cui, Yongxing,Zhang, Xingchang,et al. A novel extracellular enzyme stoichiometry method to evaluate soil heavy metal contamination: Evidence derived from microbial metabolic limitation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,738:11.
APA	Wang, Xia.,Cui, Yongxing.,Zhang, Xingchang.,Ju, Wenliang.,Duan, Chengjiao.,...&Fang, Linchuan.(2020).A novel extracellular enzyme stoichiometry method to evaluate soil heavy metal contamination: Evidence derived from microbial metabolic limitation.SCIENCE OF THE TOTAL ENVIRONMENT,738,11.
MLA	Wang, Xia,et al."A novel extracellular enzyme stoichiometry method to evaluate soil heavy metal contamination: Evidence derived from microbial metabolic limitation".SCIENCE OF THE TOTAL ENVIRONMENT 738(2020):11.