The decline in plant biodiversity slows down soil carbon turnover under increasing nitrogen deposition in a temperate steppe

doi:10.1111/1365-2435.13338

	The decline in plant biodiversity slows down soil carbon turnover under increasing nitrogen deposition in a temperate steppe
	Yang, Sen 1; Liu, Weixing ; Qiao, Chunlian 2; Wang, Jing 3; Deng, Meifeng ; Zhang, Beibei ; Liu, Lingli1
	2019
发表期刊	FUNCTIONAL ECOLOGY
ISSN	0269-8463
卷号	33 期号:7 页码:1362-1372
摘要	1. Nitrogen (N) deposition not only alters the physiological processes of individual plant, but also leads to world-wide biodiversity loss. However, little is known about how the hierarchical responses from individual physiological processes to plant community structure would have cascading effects on soil carbon (C) cycling. 2. Here, we assessed whether changes in plant chemical composition and community composition under increasing N input would affect the turnover rate of litter layer and soil C loss via heterotrophic respiration (R-h) in a temperate grassland. 3. We showed that more than a decade's N addition significantly decreased plant species richness, litter layer turnover rate and R-h. The C-13-NMR results showed that, for individual species, N addition either increased the abundance of recalcitrant C groups such as alkyl and methoxyl, or decreased labile C groups such as carbohydrate, resulting in decreases in carbohydrate C-to-methoxyl C ratio (CC/MC) for most species. Our data also showed that with the increase in N deposition, the abundance of relatively high degradable dominant species, such as Agropyron cristatum and Artimesia frigida declined rapidly, and the relatively recalcitrant species such as Potentilla bifurca and Leymus chinensis become dominant. Changes in individual species' chemical composition and plant community composition significantly decreased litter quality at community level, as indicated by the lower community-level CC/MC at higher N addition rates. 4. The result of step-AIC model selection further showed that plant diversity loss and the decrease in community-level CC/MC jointly explained the decrease in R-h after N addition best, and further relative importance partition result showed that these two factors respectively contributed 65.1% and 34.9% of the explained variation. 5. Overall, we demonstrated that changes in plant chemical composition and diversity loss due to N addition reduced the quality of plant C input to soil, which further slowed down litter layer turnover rate and inhibited soil heterotrophic respiration. Our study complements the intermediate links of how shifts in plant community structure regulate soil C cycle under global changes.
关键词	C-13-NMR litter layer turnover nitrogen deposition plant chemical composition plant diversity loss soil heterotrophic respiration soil microbes
学科领域	Ecology
DOI	10.1111/1365-2435.13338
收录类别	SCI
语种	英语
WOS关键词	TREE SPECIES-DIVERSITY ; LITTER DECOMPOSITION ; ROOT ; AVAILABILITY ; RESPONSES ; RESIDUES ; TRAITS ; SEQUESTRATION ; PRODUCTIVITY ; CONSEQUENCES
WOS研究方向	Environmental Sciences & Ecology
WOS记录号	WOS:000509349600017
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2435
资助机构	Chinese National Key Development Program for Basic Research [2014CB954003, 2017YFC0503900] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31522011, 31600389, 31670478, 31700420, 31770530]
作者邮箱	lingli.liu@ibcas.ac.cn
引用统计	被引频次：15[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/2S10CLM1/19523
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.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Xinyang Normal Univ, Coll Life Sci, Xinyang, Peoples R China 4.Hebei Univ, Coll Life Sci, Baoding, Peoples R China
推荐引用方式 GB/T 7714	Yang, Sen,Liu, Weixing,Qiao, Chunlian,et al. The decline in plant biodiversity slows down soil carbon turnover under increasing nitrogen deposition in a temperate steppe[J]. FUNCTIONAL ECOLOGY,2019,33(7):1362-1372.
APA	Yang, Sen.,Liu, Weixing.,Qiao, Chunlian.,Wang, Jing.,Deng, Meifeng.,...&Liu, Lingli.(2019).The decline in plant biodiversity slows down soil carbon turnover under increasing nitrogen deposition in a temperate steppe.FUNCTIONAL ECOLOGY,33(7),1362-1372.
MLA	Yang, Sen,et al."The decline in plant biodiversity slows down soil carbon turnover under increasing nitrogen deposition in a temperate steppe".FUNCTIONAL ECOLOGY 33.7(2019):1362-1372.

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