Increased topsoil carbon stock across China's forests

doi:10.1111/gcb.12536

	Increased topsoil carbon stock across China's forests
	Yang, Yuanhe; Li, Pin 1; Ding, Jinzhi 2; Zhao, Xia ; Ma, Wenhong 3; Ji, Chengjun 1; Fang, Jingyun1
	2014
发表期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
卷号	20 期号:8 页码:2687-2696
摘要	Biomass carbon accumulation in forest ecosystems is a widespread phenomenon at both regional and global scales. However, as coupled carbon-climate models predicted, a positive feedback could be triggered if accelerated soil carbon decomposition offsets enhanced vegetation growth under a warming climate. It is thus crucial to reveal whether and how soil carbon stock in forest ecosystems has changed over recent decades. However, large-scale changes in soil carbon stock across forest ecosystems have not yet been carefully examined at both regional and global scales, which have been widely perceived as a big bottleneck in untangling carbon-climate feedback. Using newly developed database and sophisticated data mining approach, here we evaluated temporal changes in topsoil carbon stock across major forest ecosystem in China and analysed potential drivers in soil carbon dynamics over broad geographical scale. Our results indicated that topsoil carbon stock increased significantly within all of five major forest types during the period of 1980s-2000s, with an overall rate of 20.0 g C m(-2) yr(-1) (95% confidence interval, 14.1-25.5). The magnitude of soil carbon accumulation across coniferous forests and coniferous/broadleaved mixed forests exhibited meaningful increases with both mean annual temperature and precipitation. Moreover, soil carbon dynamics across these forest ecosystems were positively associated with clay content, with a larger amount of SOC accumulation occurring in fine-textured soils. In contrast, changes in soil carbon stock across broadleaved forests were insensitive to either climatic or edaphic variables. Overall, these results suggest that soil carbon accumulation does not counteract vegetation carbon sequestration across China's forest ecosystems. The combination of soil carbon accumulation and vegetation carbon sequestration triggers a negative feedback to climate warming, rather than a positive feedback predicted by coupled carbon-climate models.
关键词	artificial neural network carbon cycle carbon-climate feedback forest ecosystems global change soil inventory soil organic carbon
学科领域	Biodiversity Conservation ; Ecology ; Environmental Sciences
DOI	10.1111/gcb.12536
收录类别	SCI
语种	英语
WOS关键词	SOIL ORGANIC-CARBON ; OLD-GROWTH FORESTS ; TERRESTRIAL ECOSYSTEMS ; ENVIRONMENTAL CONTROLS ; TIBETAN GRASSLANDS ; EUROPEAN FORESTS ; CLIMATE-CHANGE ; STORAGE ; VEGETATION ; PATTERNS
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS记录号	WOS:000339100200028
出版者	WILEY-BLACKWELL
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2486
资助机构	National Basic Research Program of China on Global Change [2014CB954001, 2010CB950600] ; National Natural Science Foundation of China [31322011, 41371213, 31021001] ; Thousand Young Talents Program
作者邮箱	yhyang@ibcas.ac.cn
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/2S10CLM1/27151
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.Peking Univ, Minist Educ, Key Lab Earth Surface Proc, Dept Ecol, Beijing 100871, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Inner Mongolia Univ, Coll Life Sci, Hohhot 010021, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yuanhe,Li, Pin,Ding, Jinzhi,et al. Increased topsoil carbon stock across China's forests[J]. GLOBAL CHANGE BIOLOGY,2014,20(8):2687-2696.
APA	Yang, Yuanhe.,Li, Pin.,Ding, Jinzhi.,Zhao, Xia.,Ma, Wenhong.,...&Fang, Jingyun.(2014).Increased topsoil carbon stock across China's forests.GLOBAL CHANGE BIOLOGY,20(8),2687-2696.
MLA	Yang, Yuanhe,et al."Increased topsoil carbon stock across China's forests".GLOBAL CHANGE BIOLOGY 20.8(2014):2687-2696.

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