Low carbon availability in paleosols nonlinearly attenuates temperature sensitivity of soil organic matter decomposition

doi:10.1111/gcb.16183

	Low carbon availability in paleosols nonlinearly attenuates temperature sensitivity of soil organic matter decomposition
	Su, Jiao 1; Zhang, Haiyang 2; Han, Xingguo1 ; Penuelas, Josep 3,4; Filimonenko, Ekaterina 5; Jiang, Yong 6; Kuzyakov, Yakov 7,8; Wei, Cunzheng 9
	2022
发表期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
卷号	28 期号:13 页码:4180-4193
摘要	Temperature sensitivity (Q(10)) of soil organic matter (SOM) decomposition is an important parameter in models of the global carbon (C) cycle. Previous studies have suggested that substrate quality controls the intrinsic Q(10), whereas environmental factors can impose large constraints. For example, physical protection of SOM and its association with minerals attenuate the apparent Q(10) through reducing substrate availability and accessibility ([S]). The magnitude of this dampening effect, however, has never been quantified. We simulated theoretical Q(10) changes across a wide range of [S] and found that the relationship between Q(10) and the log(10)-transformed [S] followed a logistic rather than a linear function. Based on the unique Holocene paleosol chronosequence (7 soils from ca. 500 to 6900 years old), we demonstrated that the Q(10) decreased nonlinearly with soil age up to 1150 years, beyond which Q(10) remained stable. Hierarchical partitioning analysis indicated that an integrated C availability index, derived from principal component analysis of DOC content and parameters reflecting physical protection and mineral association, was the main explanatory variable for the nonlinear decrease of Q(10) with soil age. Microbial inoculation and C-13-labelled glucose addition showed that low C availability induced by physical protection and minerals association attenuated Q(10) along the chronosequence. A separate soil incubation experiment indicated that Q(10) increased exponentially with activation energy (E-a) in the modern soil, suggesting that SOM chemical complexity regulates Q(10) only when C availability is high. In conclusion, organic matter availability strongly decreased with soil age, whereas Michelis-Menten kinetics defines the Q(10) response depending on C availability, but Arrhenius equation describes the effects of increasing substrate complexity.
关键词	carbon cycling global warming mineral association organic matter stability paleosol physical protection
学科领域	Biodiversity Conservation ; Ecology ; Environmental Sciences
DOI	10.1111/gcb.16183
收录类别	SCI
语种	英语
WOS关键词	MICROBIAL BIOMASS ; SUBSTRATE AVAILABILITY ; ENZYME-ACTIVITIES ; LAND-USE ; RESPIRATION ; STABILIZATION ; AGGREGATION ; NITROGEN ; IMPACTS ; QUALITY
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000784547200001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2486
资助机构	National Natural Science Foundation of China [32171601] ; National Key Research and Development Program of China [2016YFC0500700, 2017YFA0604802] ; Spanish government project [PID2019-110521GB-I00] ; Catalan government project [SGR2017-1005] ; Fundacion Ramon Areces grant ELEMENTAL-CLIMATE. ; RUDN University Strategic Academic Leadership Program ; West-Siberian Interregional Science and Education Center's [89-DON 1] ; Stability and Functions of Soil Carbon in Agroecosystems of Russia (CarboRus) [075-15-2021-610]
作者邮箱	weicunzheng@ibcas.ac.cn
引用统计	被引频次：9[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/2S10CLM1/28613
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.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW, Australia 4.CSIC, Global Ecol Unit CREAF CSIC UAB, Barcelona, Catalonia, Spain 5.CREAF, Barcelona, Catalonia, Spain 6.Tyumen State Univ, Inst Environm & Agr Biol X BIO, Tyumen, Russia 7.Hebei Univ, Coll Life Sci, Baoding, Peoples R China 8.Univ Goettingen, Dept Soil Sci Temperate Ecosyst, Dept Agr Soil Sci, Gottingen, Germany 9.Peoples Friendship Univ Russia, RUDN Univ, Moscow, Russia 10.Netherlands Inst Ecol NIOO KNAW, Dept Terr Ecol, Wageningen, Netherlands
推荐引用方式 GB/T 7714	Su, Jiao,Zhang, Haiyang,Han, Xingguo,et al. Low carbon availability in paleosols nonlinearly attenuates temperature sensitivity of soil organic matter decomposition[J]. GLOBAL CHANGE BIOLOGY,2022,28(13):4180-4193.
APA	Su, Jiao.,Zhang, Haiyang.,Han, Xingguo.,Penuelas, Josep.,Filimonenko, Ekaterina.,...&Wei, Cunzheng.(2022).Low carbon availability in paleosols nonlinearly attenuates temperature sensitivity of soil organic matter decomposition.GLOBAL CHANGE BIOLOGY,28(13),4180-4193.
MLA	Su, Jiao,et al."Low carbon availability in paleosols nonlinearly attenuates temperature sensitivity of soil organic matter decomposition".GLOBAL CHANGE BIOLOGY 28.13(2022):4180-4193.

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