Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands

doi:10.1029/2018JG004782

	Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands
	Fang, Kai 1; Qin, Shuqi 1; Chen, Leiyi ; Zhang, Qiwen 1; Yang, Yuanhe1
	2019
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
卷号	124 期号:2 页码:247-259
摘要	Adequate understanding of the controlling factors of soil carbon (C) stock is crucial for improving the predictability of Earth System Models in exploring terrestrial C-climate feedback. Current studies, however, mainly focus on climatic and edaphic variables and rarely explore the effects of mineral protection in regulating soil organic carbon (SOC) stock over broad geographic scale. Particularly, the relative importance of mineral protection compared with other factors is unclear. Based on large-scale soil inventory, here we filled this knowledge gap by exploring the effects of Al/Fe-(hydr) oxides on SOC and three C fractions across Tibetan alpine grasslands via linear regression, partial correlation, and variance partitioning analyses, and also by comparing the degree of mineral protection in alpine grasslands with other ecosystems. Our results showed that SOC and C fractions across Tibetan alpine grasslands were regulated by Al/Fe-(hydr) oxides, with the incorporation of mineral variables increasing the explained variations by 10.1% for SOC content, 13.4% for coarse particulate organic matter, 12.6% for microaggregate associated C, and 21.9% for silt and clay associated C. Moreover, the contribution of mineral effects exceeded that of climatic and edaphic factors, particularly in the silt and clay associated C fraction. In addition, about 15.812.0% of SOC pools were associated with Fe, which was equal to or higher than those in temperate and tropical-subtropical ecosystems. Taken together, these results demonstrate the significant role of Al/Fe minerals in the stabilization of SOC across Tibetan alpine grasslands, highlighting the importance of incorporating C-mineral interactions into ESMs for better understanding the terrestrial C-climate feedback.
关键词	carbon cycle climate feedback geochemistry mineral protection soil organic carbon stabilization
学科领域	Environmental Sciences ; Geosciences, Multidisciplinary
DOI	10.1029/2018JG004782
收录类别	SCI
语种	英语
WOS关键词	FOREST SOILS ; TEMPERATURE SENSITIVITY ; PERMAFROST SOILS ; MATTER ; IRON ; STORAGE ; CLIMATE ; STABILIZATION ; DYNAMICS ; ASSOCIATIONS
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS记录号	WOS:000460859100004
出版者	AMER GEOPHYSICAL UNION
文献子类	Article
出版地	WASHINGTON
EISSN	2169-8961
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31670482, 31825006, 31770557] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences [QYZDB-SSW-SMC049] ; Chinese Academy of Sciences-Peking University Pioneer Cooperation Team ; Strategic Priority Research Program of the Chinese Academy of SciencesChinese Academy of Sciences [XDA19070303]
作者邮箱	yhyang@ibcas.ac.cn
引用统计	被引频次：42[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/2S10CLM1/19459
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, Coll Resources & Environm, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Fang, Kai,Qin, Shuqi,Chen, Leiyi,et al. Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2019,124(2):247-259.
APA	Fang, Kai,Qin, Shuqi,Chen, Leiyi,Zhang, Qiwen,&Yang, Yuanhe.(2019).Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,124(2),247-259.
MLA	Fang, Kai,et al."Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 124.2(2019):247-259.

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