Evidence that acidification-induced declines in plant diversity and productivity are mediated by changes in below-ground communities and soil properties in a semi-arid steppe

doi:10.1111/1365-2745.12119

	Evidence that acidification-induced declines in plant diversity and productivity are mediated by changes in below-ground communities and soil properties in a semi-arid steppe
	Chen, Dima ; Lan, Zhichun ; Bai, Xue ; Grace, James B.; Bai, Yongfei
	2013
发表期刊	JOURNAL OF ECOLOGY
ISSN	0022-0477
卷号	101 期号:5 页码:1322-1334
摘要	1. Anthropogenic acid deposition-induced soil acidification is one of the major threats to biodiversity, ecosystem functioning and services. Few studies, however, have explored in detail how above-ground changes in plant species richness and productivity resulting from soil acidification are mediated by effects on below-ground biota and soil properties. 2. To increase our understanding of this linkage, we collected data on below- and above-ground communities and soil properties in a 3-year field experiment with seven levels of acid addition rate to build-up broad intensities of soil acidification in the semi-arid Inner Mongolian grassland. 3. Acid addition directly elevated concentrations of soil Al3+ ions, decreased the base cations Ca2+, Mg2+ and Na+, and increased soil moisture and available phosphorus. Acid addition also appears to have altered the soil microbial community via changes in H+ and Al3+ ions and altered the nematode community via changes in H+ ions and soil moisture. 4. The observed changes in soil N availability (i.e. net N mineralization, NO3--N and NH4+-N could be explained by mediating changes in the H+ and Al3+ ions, microbial community (i.e. community structure, bacteria and fungi/bacteria as indicated by phospholipid fatty acids analysis) and the nematode community (i.e. total abundance, taxa richness and maturity index). 5. Declines in plant species richness and productivity were greater at high intensities of soil acidification in the second sampling year than in the first sampling year. The changes in plant community observed were mostly explained by soil nutrient pathways (e.g. N availability or base mineral cations), which were in turn regulated by the soil microbial or nematode communities as well as by the direct effects of the increase in H+ or Al3+ ions. 6. Synthesis. Our results suggest that the below-ground microbial and nematode communities are more sensitive to soil acidification than the plant communities are, and further that soil acidification-induced changes in plants are mediated by changes in below-ground communities and soil nutrients. These findings improve our understanding of the links between below- and above-ground communities in the Inner Mongolia grassland, especially in the context of anthropogenic acid enrichment.
关键词	base mineral cations nitrogen cycling plant species richness plant-soil (below-ground) interactions productivity semi-arid steppe soil aluminium ions soil microbial organisms soil nematodes structural equation modelling
学科领域	Plant Sciences ; Ecology
DOI	10.1111/1365-2745.12119
收录类别	SCI
语种	英语
WOS关键词	BACTERIAL-FEEDING NEMATODES ; MICROBIAL COMMUNITIES ; NITROGEN DEPOSITION ; ALUMINUM TOXICITY ; FOREST SOILS ; PH GRADIENT ; IMPACT ; ACID ; MINERALIZATION ; BIODIVERSITY
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000323699000024
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2745
资助机构	State Key Basic Research Development Program of China ; Natural Science Foundation of China(National Natural Science Foundation of China (NSFC)) ; USGS Status and Trends, Ecosystems, and Global Change Programs(United States Geological Survey)
作者邮箱	Grace, James/B-8472-2009 ; Chen, Dima/H-4060-2013
引用统计	被引频次：203[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/2S10CLM1/28149
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.Grace, James B.] US Geol Survey, Natl Wetlands Res Ctr, Lafayette, LA 70506 USA
推荐引用方式 GB/T 7714	Chen, Dima,Lan, Zhichun,Bai, Xue,et al. Evidence that acidification-induced declines in plant diversity and productivity are mediated by changes in below-ground communities and soil properties in a semi-arid steppe[J]. JOURNAL OF ECOLOGY,2013,101(5):1322-1334.
APA	Chen, Dima,Lan, Zhichun,Bai, Xue,Grace, James B.,&Bai, Yongfei.(2013).Evidence that acidification-induced declines in plant diversity and productivity are mediated by changes in below-ground communities and soil properties in a semi-arid steppe.JOURNAL OF ECOLOGY,101(5),1322-1334.
MLA	Chen, Dima,et al."Evidence that acidification-induced declines in plant diversity and productivity are mediated by changes in below-ground communities and soil properties in a semi-arid steppe".JOURNAL OF ECOLOGY 101.5(2013):1322-1334.

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