Biotic community shifts explain the contrasting responses of microbial and root respiration to experimental soil acidification

doi:10.1016/j.soilbio.2015.08.009

	Biotic community shifts explain the contrasting responses of microbial and root respiration to experimental soil acidification
	Chen, Dima 1; Wang, Yang ; Lan, Zhichun ; Li, Jianjun ; Xing, Wen ; Hu, Shuijin 1; Bai, Yongfei
	2015
发表期刊	SOIL BIOLOGY & BIOCHEMISTRY
ISSN	0038-0717
卷号	90 页码:139-147
摘要	Soil respiration is comprised primarily of root and microbial respiration, and accounts for nearly half of the total CO2 efflux from terrestrial ecosystems. Soil acidification resulting from acid deposition significantly affects soil respiration. Yet, the mechanisms that underlie the effects of acidification on soil respiration and its two components remain unclear. We collected data on sources of soil CO2 efflux (microbial and root respiration), above- and belowground biotic communities, and soil properties in a 4-year field experiment with seven levels of acid in a semi-arid Inner Mongolian grassland. Here, we show that soil acidification has contrasting effects on root and microbial respiration in a typical steppe grassland. Soil acidification increases root respiration mainly by an increase in root biomass and a shift to plant species with greater specific root respiration rates. The shift of plant community from perennial bunchgrasses to perennial rhizome grasses was in turn regulated by the decreases in soil base cations and N status. In contrast, soil acidification suppresses microbial respiration by reducing total microbial biomass and enzymatic activities, which appear to result from increases in soil H+ ions and decreases in soil base cations. Our results suggest that shifts in both plant and microbial communities dominate the responses of soil respiration and its components to soil acidification. These results also indicate that carbon cycling models concerned with future climate change should consider soil acidification as well as shifts in biotic communities. (C) 2015 Elsevier Ltd. All rights reserved.
关键词	Plant functional group Soil microbial communities Plant-soil interactions Carbon cycling models Base mineral cations Extracellular enzyme activity
学科领域	Soil Science
DOI	10.1016/j.soilbio.2015.08.009
收录类别	SCI
语种	英语
WOS关键词	NITROGEN DEPOSITION ; FOREST SOIL ; ENZYME-ACTIVITY ; ALUMINUM TOXICITY ; SEMIARID STEPPE ; SO2 EMISSIONS ; PH GRADIENT ; CO2 EFFLUX ; IN-SITU ; CARBON
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000363075500015
出版者	PERGAMON-ELSEVIER SCIENCE LTD
文献子类	Article
出版地	OXFORD
资助机构	Chinese National Key Development Program for Basic Research [2015CB954201] ; Natural Science Foundation of China [31320103916, 31570450, 31100335] ; Youth Innovation Promotion Association CAS
作者邮箱	chendima@ibcas.ac.cn
引用统计	被引频次：37[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/25616
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, Beijing 100093, Peoples R China 2.N Carolina State Univ, Dept Plant Pathol, Raleigh, NC 27695 USA
推荐引用方式 GB/T 7714	Chen, Dima,Wang, Yang,Lan, Zhichun,et al. Biotic community shifts explain the contrasting responses of microbial and root respiration to experimental soil acidification[J]. SOIL BIOLOGY & BIOCHEMISTRY,2015,90:139-147.
APA	Chen, Dima.,Wang, Yang.,Lan, Zhichun.,Li, Jianjun.,Xing, Wen.,...&Bai, Yongfei.(2015).Biotic community shifts explain the contrasting responses of microbial and root respiration to experimental soil acidification.SOIL BIOLOGY & BIOCHEMISTRY,90,139-147.
MLA	Chen, Dima,et al."Biotic community shifts explain the contrasting responses of microbial and root respiration to experimental soil acidification".SOIL BIOLOGY & BIOCHEMISTRY 90(2015):139-147.

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