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Effects of shrub encroachment on soil aggregates and organic carbon vary in different grasslands in Inner Mongolia, China

文献类型：期刊论文

作者Zhu, Yankun1; Shen, Haihua1; Feng, Yinping1; Li, He; Akinyemi, Damilare Stephen1; Hu, Huifeng; Fang, Jingyun1,2
刊名ECOSPHERE
出版日期2021
卷号12期号:2
关键词deep soil desert grassland shrub encroachment soil aggregate soil organic carbon typical grassland
ISSN号2150-8925
DOI10.1002/ecs2.3363
文献子类Article
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.
学科主题Ecology
出版地HOBOKEN
WOS关键词WOODY PLANT ENCROACHMENT ; NITROGEN ; MATTER ; SEQUESTRATION ; INVASION ; COMMUNITIES ; FRACTIONS ; STABILITY ; TURNOVER ; DYNAMICS
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
WOS记录号WOS:000623677800013
出版者WILEY
资助机构National Science Foundation of China [31330012, 31470525, 31988102] ; National Basic Research Program of China on Global Change [2014CB954001] ; Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-SMC011]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/26745]  
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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.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]. ECOSPHERE,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).

入库方式： OAI收割

来源：植物研究所

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