Climate warming alters subsoil but not topsoil carbon dynamics in alpine grassland

doi:10.1111/gcb.14823

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	Climate warming alters subsoil but not topsoil carbon dynamics in alpine grassland
	Jia, Juan 7; Cao, Zhenjiao 7; Liu, Chengzhu 7; Zhang, Zhenhua 6; Lin, Li ; Wang, Yiyun 7; Haghipour, Negar 4; Wacker, Lukas 3; Bao, Hongyan 2; Dittmar, Thorston 1
刊名	GLOBAL CHANGE BIOLOGY
	2019
卷号	25 期号:12 页码:4383-4393
关键词	deep soil lignin decomposition physical fraction radiocarbon soil organic carbon warming
ISSN号	1354-1013
DOI	10.1111/gcb.14823
文献子类	Article
英文摘要	Subsoil contains more than half of soil organic carbon (SOC) globally and is conventionally assumed to be relatively unresponsive to warming compared to the topsoil. Here, we show substantial changes in carbon allocation and dynamics of the subsoil but not topsoil in the Qinghai-Tibetan alpine grasslands over 5 years of warming. Specifically, warming enhanced the accumulation of newly synthesized (C-14-enriched) carbon in the subsoil slow-cycling pool (silt-clay fraction) but promoted the decomposition of plant-derived lignin in the fast-cycling pool (macroaggregates). These changes mirrored an accumulation of lipids and sugars at the expense of lignin in the warmed bulk subsoil, likely associated with shortened soil freezing period and a deepening root system. As warming is accompanied by deepening roots in a wide range of ecosystems, root-driven accrual of slow-cycling pool may represent an important and overlooked mechanism for a potential long-term carbon sink at depth. Moreover, given the contrasting sensitivity of SOC dynamics at varied depths, warming studies focusing only on surface soils may vastly misrepresent shifts in ecosystem carbon storage under climate change.
学科主题	Biodiversity Conservation ; Ecology ; Environmental Sciences
电子版国际标准刊号	1365-2486
出版地	HOBOKEN
WOS关键词	SOIL ORGANIC-MATTER ; ELEVATED CO2 ; SEQUESTRATION ; DECOMPOSITION ; TEMPERATURE ; NITROGEN ; MASS ; DEGRADATION ; SENSITIVITY ; BIOMARKERS
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	WILEY
WOS记录号	WOS:000491594700001
资助机构	Chinese National Key Development Program for Basic Research [2015CB954201, 2017YFC0503902] ; International Partnership Program of Chinese Academy of Sciences [151111KYSB20160014] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31370491, 31630009, 41422304, 41773067]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/19614]
专题	植被与环境变化国家重点实验室
作者单位	1.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen, Fujian, Peoples R China 2.Swiss Fed Inst Technol, Lab Ion Beam Phys, Dept Phys, Zurich, Switzerland 3.Swiss Fed Inst Technol, Geol Inst, Zurich, Switzerland 4.Peking Univ, Coll Urban & Environm Sci, Inst Ecol, Beijing, Peoples R China 5.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou, Gansu, Peoples R China 6.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 7.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 8.Crowther, Thomas W.] Swiss Fed Inst Technol, Inst Integrat Biol, Zurich, Switzerland 9.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining, Qinghai, Peoples R China 10.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Jia, Juan,Cao, Zhenjiao,Liu, Chengzhu,et al. Climate warming alters subsoil but not topsoil carbon dynamics in alpine grassland[J]. GLOBAL CHANGE BIOLOGY,2019,25(12):4383-4393.
APA	Jia, Juan.,Cao, Zhenjiao.,Liu, Chengzhu.,Zhang, Zhenhua.,Lin, Li.,...&Feng, Xiaojuan.(2019).Climate warming alters subsoil but not topsoil carbon dynamics in alpine grassland.GLOBAL CHANGE BIOLOGY,25(12),4383-4393.
MLA	Jia, Juan,et al."Climate warming alters subsoil but not topsoil carbon dynamics in alpine grassland".GLOBAL CHANGE BIOLOGY 25.12(2019):4383-4393.