干旱区生态环境知识资源中心(Arid): Effects of shrub encroachment on soil aggregates and organic carbon vary in different grasslands in Inner Mongolia, China

Arid

DOI	10.1002/ecs2.3363
	Effects of shrub encroachment on soil aggregates and organic carbon vary in different grasslands in Inner Mongolia, China
	Zhu, Yankun; Shen, Haihua; Feng, Yinping; Li, He; Akinyemi, Damilare Stephen; Hu, Huifeng; Fang, Jingyun
通讯作者	Shen, HH (corresponding author), Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China. ; Shen, HH (corresponding author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2021
卷号	12 期号:2
英文摘要	Widespread shrub encroachment in grasslands can lead to changes in soil aggregates and soil organic carbon (SOC), especially in deep soils. Soil aggregates physicochemically protect SOC and thus affect soil carbon sequestration. Characterizing the changes in soil aggregates and their organic carbon associated with shrub encroachment is critical for evaluating the ecological consequences of shrub encroachment in different grasslands. In this study, we investigated soil aggregates of various sizes and their associated organic carbon at maximum soil depths of 5 m in shrub patches and neighboring grass matrix in two types (desert and typical) of grasslands in Inner Mongolia, China. The mean weight diameter (MWD) of the soil aggregates was similar between the shrub patches and grass matrix in both grasslands. However, the proportion of each aggregate size fraction to whole soil in the shrub patches was significantly lower than that in the grass matrix in the desert grasslands, while there was no significant difference between the shrub patches and grass matrix in the typical grasslands. In addition, the organic carbon content of aggregates in the shrub patches was greater than that in the grass matrix in deep soil layers (>50 cm) but was lower in the topsoil (0-10 cm depth) in the desert grasslands. However, the organic carbon content of aggregates at all soil depths was greater in shrub patches than in the grass matrix in typical grasslands. Our results suggest that the effects of shrub encroachment on the soil aggregate proportion and associated organic carbon vary at different soil depths and in different grassland types. The results of this study also suggest that it is necessary to determine the size structure and its relation to carbon content for soil aggregates to accurately predict SOC dynamics with shrub encroachment.
英文关键词	deep soil desert grassland shrub encroachment soil aggregate soil organic carbon typical grassland
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000623677800013
WOS关键词	WOODY PLANT ENCROACHMENT ; NITROGEN ; MATTER ; SEQUESTRATION ; INVASION ; COMMUNITIES ; FRACTIONS ; STABILITY ; TURNOVER ; DYNAMICS
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
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/2XILL650/350045
作者单位	[Zhu, Yankun; Shen, Haihua; Feng, Yinping; Li, He; Akinyemi, Damilare Stephen; Hu, Huifeng; Fang, Jingyun] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China; [Zhu, Yankun; Shen, Haihua; Feng, Yinping; Akinyemi, Damilare Stephen; Fang, Jingyun] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Fang, Jingyun] Peking Univ, Key Lab Earth Surface Proc, Coll Urban & Environm, Dept Ecol,Minist Educ, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Yankun,Shen, Haihua,Feng, Yinping,et al. Effects of shrub encroachment on soil aggregates and organic carbon vary in different grasslands in Inner Mongolia, China[J]. 北京大学, 中国科学院植物研究所,2021,12(2).
APA	Zhu, Yankun.,Shen, Haihua.,Feng, Yinping.,Li, He.,Akinyemi, Damilare Stephen.,...&Fang, Jingyun.(2021).Effects of shrub encroachment on soil aggregates and organic carbon vary in different grasslands in Inner Mongolia, China.ECOSPHERE,12(2).
MLA	Zhu, Yankun,et al."Effects of shrub encroachment on soil aggregates and organic carbon vary in different grasslands in Inner Mongolia, China".ECOSPHERE 12.2(2021).