Priming of soil organic matter decomposition scales linearly with microbial biomass response to litter input in steppe vegetation

doi:10.1111/oik.01728

	Priming of soil organic matter decomposition scales linearly with microbial biomass response to litter input in steppe vegetation
	Xiao, Chunwang ; Guenet, Bertrand 2; Zhou, Yong ; Su, Jiaqi ; Janssens, Ivan A.
	2015
发表期刊	OIKOS
ISSN	0030-1299
卷号	124 期号:5 页码:649-657
摘要	Fresh plant litter inputs accelerate soil organic matter (SOM) decomposition through a ubiquitous mechanism called priming. Insufficient priming has been suggested as a stabilization mechanism of SOM at depth, as well as the long-term persistence of some highly degradable organic compounds in soils. Priming therefore plays a crucial, albeit unquantified and commonly neglected, role in the global carbon cycle. Because priming intensity is likely to be altered by global change-induced changes in net primary productivity, it casts substantial uncertainty to future projections of the climate-carbon cycle feedback. Using results from a large field litter manipulation experiment in Mongolian steppe, we here show that priming intensifies with increasing litter inputs, but at a decreasing efficiency: the stimulation per unit litter added declines with increasing litter inputs. This non-linear behavior originates from two antagonistic responses to fresh litter inputs: a stimulation of microbial activity versus a shift in microbial community composition (more fungi) associated to substrate shift from SOM to litter. Despite all complexity, however, the priming effect on SOM decomposition scaled linearly with the response of microbial biomass across the entire range of plant litter addition (60-480 g C m(-2)), suggesting that priming could be modeled effectively as a function of the response of microbial biomass to litter inputs. Incorporating the priming mechanism in Earth System models will improve their estimates of the SOM-climate feedback and appears to be best addressed by explicitly representing microbial biomass in the models.
学科领域	Ecology
DOI	10.1111/oik.01728
收录类别	SCI
语种	英语
WOS关键词	TEMPERATURE SENSITIVITY ; CARBON STORAGE ; RESPIRATION ; CLIMATE ; COMMUNITY ; NITROGEN ; TERRESTRIAL ; MECHANISMS ; SUBSTRATE ; DYNAMICS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000356010300013
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1600-0706
资助机构	Chinese Academy of Sciences [XDA05050407] ; National Natural Science Foundation of China [31370462] ; State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, the Chinese Academy of Sciences ; Flemish National Science Foundation ; European Community [226701] ; European Research Council Synergy grant [610028] ; Cost Action Terrabites [ES-0805]
作者邮箱	ivan.janssens@uantwerpen.be
作品OA属性	Green Accepted
引用统计	被引频次：72[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/2S10CLM1/25865
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.Guenet, Bertrand; Janssens, Ivan A.] Univ Antwerp, Res Grp Plant & Vegetat Ecol, Dept Biol, BE-2610 Antwerp, Belgium 3.CNRS CEA UVSQ, Lab Sci Climat & Environm, UMR 8212, FR-91191 Gif Sur Yvette, France
推荐引用方式 GB/T 7714	Xiao, Chunwang,Guenet, Bertrand,Zhou, Yong,et al. Priming of soil organic matter decomposition scales linearly with microbial biomass response to litter input in steppe vegetation[J]. OIKOS,2015,124(5):649-657.
APA	Xiao, Chunwang,Guenet, Bertrand,Zhou, Yong,Su, Jiaqi,&Janssens, Ivan A..(2015).Priming of soil organic matter decomposition scales linearly with microbial biomass response to litter input in steppe vegetation.OIKOS,124(5),649-657.
MLA	Xiao, Chunwang,et al."Priming of soil organic matter decomposition scales linearly with microbial biomass response to litter input in steppe vegetation".OIKOS 124.5(2015):649-657.

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