干旱区生态环境知识资源中心(Arid): Shrub encroachment decreases soil inorganic carbon stocks in Mongolian grasslands

Arid

DOI	10.1111/1365-2745.13298
	Shrub encroachment decreases soil inorganic carbon stocks in Mongolian grasslands
	Liu, Shangshi 1,2; Zhou, Luhong 1,3; Li, He 1,2; Zhao, Xia 1; Yang, Yuanhe 1; Zhu, Yankun 1,2; Hu, Huifeng 1; Chen, Leiyi 1; Zhang, Pujin 1,5; Shen, Haihua 1,2; Fang, Jingyun 1,3,4
通讯作者	Shen, Haihua ; Fang, Jingyun
来源期刊	JOURNAL OF ECOLOGY
ISSN	0022-0477
EISSN	1365-2745
出版年	2020
卷号	108 期号:2 页码:678-686
英文摘要	Widespread shrub encroachment in global drylands may increase plant biomass and change soil organic carbon stocks of grassland ecosystems. However, the response of soil inorganic carbon (SIC), which is a major component of dryland carbon pools, to this vegetation shift remains unknown. We conducted a systematic field survey in 75 pairs of shrub-encroached grassland (SEG) and control plots at 25 sites in the grasslands of the Inner Mongolia Plateau to evaluate how shrub encroachment affects SIC density (SICD) in these ecosystems. We found that shrub encroachment significantly reduced SICD in the upper 100 cm (3.85 vs. 4.74 kg C m(-2), p < .05), especially in the subsurface soil (20-50 cm layer). The magnitude of SICD changes was related to the change in soil pH, shrub patch size and initial SICD, reflecting that the reduction in SICD might be attributed to the shrub encroachment-related soil acidification. Our results also revealed that the lost SIC was mainly released into the atmosphere rather than redistributed into deeper soil layers. Synthesis. We provide the first evidence for the soil acidification-induced SIC loss caused by shrub encroachment. Our findings highlight the non-negligible role of SIC dynamics in the C budget of SEG ecosystems and the need to consider these dynamics in terrestrial C cycle research.
英文关键词	carbon budget carbon source shrub encroachment soil acidification soil inorganic carbon temperate grassland
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000492851100001
WOS关键词	SPATIAL HETEROGENEITY ; ORGANIC-CARBON ; SEQUESTRATION ; STORAGE ; LOSSES ; FOREST ; DESERT ; CHINA
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
EI主题词	2019-10-28
来源机构	北京大学 ; 中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310372
作者单位	1.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Beijing, Peoples R China; 3.Peking Univ, Inst Ecol, Coll Urban & Environm, Beijing, Peoples R China; 4.Peking Univ, Key Lab Earth Surface Proc, Minist Educ, Beijing, Peoples R China; 5.Inner Mongolia Acad Agr & Anim Husb Sci, Hohhot, Peoples R China
推荐引用方式 GB/T 7714	Liu, Shangshi,Zhou, Luhong,Li, He,et al. Shrub encroachment decreases soil inorganic carbon stocks in Mongolian grasslands[J]. 北京大学, 中国科学院植物研究所,2020,108(2):678-686.
APA	Liu, Shangshi.,Zhou, Luhong.,Li, He.,Zhao, Xia.,Yang, Yuanhe.,...&Fang, Jingyun.(2020).Shrub encroachment decreases soil inorganic carbon stocks in Mongolian grasslands.JOURNAL OF ECOLOGY,108(2),678-686.
MLA	Liu, Shangshi,et al."Shrub encroachment decreases soil inorganic carbon stocks in Mongolian grasslands".JOURNAL OF ECOLOGY 108.2(2020):678-686.