Effects of aridity on soil microbial communities and functions across soil depths on the Mongolian Plateau

doi:10.1111/1365-2435.13359

	Effects of aridity on soil microbial communities and functions across soil depths on the Mongolian Plateau
	Chen, Dima ; Saleem, Muhammad 1; Cheng, Junhui ; Mi, Jia 2; Chu, Pengfei 3; Tuvshintogtokh, Indree 4; Hu, Shuijin 5; Bai, Yongfei6
	2019
发表期刊	FUNCTIONAL ECOLOGY
ISSN	0269-8463
卷号	33 期号:8 页码:1561-1571
摘要	Arid and semi-arid grassland ecosystems cover about 15% of the global land surface and provide vital soil carbon (C) and nitrogen (N) sequestration. Although half of the soil C and N is stored in deep soils (below 30 cm), no regional-scale study of microbial properties and their functions through the soil profile has been conducted in these drylands. To explore the distribution and determinants of microbial properties and C and N mineralization rates through soil profile along aridity gradient at a regional scale, we investigated these variables for four soil layers (0-20, 20-40, 40-60 and 60-100 cm) in 132 plots on the Mongolia Plateau. Soil microbial properties (biomass and bacteria:fungi ratio) and C and N mineralization rates decreased with increasing soil depth and aridity at the regional scale. Aridity-induced declines in soil microbial properties mainly resulted from the negative effects of aridity on ANPP/root biomass and soil organic C (SOC) in the surface soil layers (0-20 and 20-40 cm) but from the direct and indirect (via SOC and soil C/N) negative effects of aridity in the deep soil layers (40-60 and 60-100 cm). Aridity-induced declines in soil C mineralization rates mainly resulted from the negative indirect effect of aridity on SOC and microbial properties in each soil layer, with weaker effects of SOC and stronger effects of soil microbes in the deep soil layers. Aridity-induced declines in soil N mineralization rates mainly resulted from the negative indirect effect of aridity on SOC in the three soil layers above 60 cm and mainly resulted from the negative direct effect of aridity in the 60-100 cm soil layer. Aridity via direct or indirect effects strongly determined the patterns of soil microbial properties and C and N mineralization throughout soil profiles on the Mongolian Plateau. These findings suggest that the increases in aridity are likely to induce changes in soil micro-organisms and their associated functions across soil depths of semi-arid grasslands, and future models should consider the dynamic interactions between substrates and microbial properties across soil depths in global drylands. A plain language summary is available for this article.
关键词	biogeographical patterns depth profile microbial community structure semi-arid grasslands soil carbon mineralization soil nitrogen mineralization
学科领域	Ecology
DOI	10.1111/1365-2435.13359
收录类别	SCI
语种	英语
WOS关键词	ORGANIC-MATTER ; NITROGEN MINERALIZATION ; VERTICAL-DISTRIBUTION ; GRASSLAND SOILS ; CARBON ; BACTERIAL ; PATTERNS ; DRIVERS ; PLANT ; DIVERSITY
WOS研究方向	Environmental Sciences & Ecology
WOS记录号	WOS:000479317100017
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2435
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31320103916, 31570450] ; Chinese National Key Development Program for Basic Research [2016YFC0500804] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences [2015061]
作者邮箱	chendima@ibcas.ac.cn ; yfbai@ibcas.ac.cn
引用统计	被引频次：56[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/2S10CLM1/19395
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, Peoples R China 2.Alabama State Univ, Dept Biol Sci, Montgomery, AL 36101 USA 3.Shanxi Univ, Inst Loess Plateau, Taiyuan, Shanxi, Peoples R China 4.Liaocheng Univ, Coll Agr, Liaocheng, Shandong, Peoples R China 5.Mongolian Acad Sci, Inst Bot, Dept Vegetat Ecol, Ulaanbaatar, Mongolia 6.North Carolina State Univ, Dept Plant Pathol, Box 7616, Raleigh, NC 27695 USA 7.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Chen, Dima,Saleem, Muhammad,Cheng, Junhui,et al. Effects of aridity on soil microbial communities and functions across soil depths on the Mongolian Plateau[J]. FUNCTIONAL ECOLOGY,2019,33(8):1561-1571.
APA	Chen, Dima.,Saleem, Muhammad.,Cheng, Junhui.,Mi, Jia.,Chu, Pengfei.,...&Bai, Yongfei.(2019).Effects of aridity on soil microbial communities and functions across soil depths on the Mongolian Plateau.FUNCTIONAL ECOLOGY,33(8),1561-1571.
MLA	Chen, Dima,et al."Effects of aridity on soil microbial communities and functions across soil depths on the Mongolian Plateau".FUNCTIONAL ECOLOGY 33.8(2019):1561-1571.

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