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DOI	10.1088/1748-9326/ab239c
	Global soil acidification impacts on belowground processes
	Meng C.; Tian D.; Zeng H.; Li Z.; Yi C.; Niu S.
发表日期	2019
ISSN	17489318
卷号	14 期号:7
英文摘要	With continuous nitrogen (N) enrichment and sulfur (S) deposition, soil acidification has accelerated and become a global environmental issue. However, a full understanding of the general pattern of ecosystem belowground processes in response to soil acidification due to the impacting factors remains elusive. We conducted a meta-analysis of soil acidification impacts on belowground functions using 304 observations from 49 independent studies, mainly including soil cations, soil nutrient, respiration, root and microbial biomass. Our results show that acid addition significantly reduced soil pH by 0.24 on average, with less pH decrease in forest than non-forest ecosystems. The response ratio of soil pH was positively correlated with site precipitation and temperature, but negatively with initial soil pH. Soil base cations (Ca2+, Mg2+, Na+) decreased while non-base cations (Al3+, Fe3+) increased with soil acidification. Soil respiration, fine root biomass, microbial biomass carbon and nitrogen were significantly reduced by 14.7%, 19.1%, 9.6% and 12.1%, respectively, under acid addition. These indicate that soil carbon processes are sensitive to soil acidification. Overall, our meta-analysis suggests a strong negative impact of soil acidification on belowground functions, with the potential to suppress soil carbon emission. It also arouses our attention to the toxic effects of soil ions on terrestrial ecosystems. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Acid deposition; meta-analysis; microbes; soil cations; soil pH; soil respiration
语种	英语
scopus关键词	Acidification; Biomass; Carbon; Deposition; Ecosystems; Forestry; Nitrogen; Positive ions; Acid deposition; Meta analysis; microbes; Soil pH; Soil respiration; Soils
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154527
作者单位	Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; Shenzhen Graduate School, Peking University, Shenzhen, 518055, China; School of Earth and Environmental Sciences, Queens College of the City University of New YorkNY 11367, United States; Department of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Meng C.,Tian D.,Zeng H.,et al. Global soil acidification impacts on belowground processes[J],2019,14(7).
APA	Meng C.,Tian D.,Zeng H.,Li Z.,Yi C.,&Niu S..(2019).Global soil acidification impacts on belowground processes.Environmental Research Letters,14(7).
MLA	Meng C.,et al."Global soil acidification impacts on belowground processes".Environmental Research Letters 14.7(2019).