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Shrub-encroachment induced alterations in input chemistry and soil microbial community affect topsoil organic carbon in an Inner Mongolian grassland

文献类型：期刊论文

作者Zhou, Luhong2; Li, He; Shen, Haihua; Xu, Yunping5; Wang, Yinghui1,4; Xing, Aijun2; Fang, Jingyun
刊名BIOGEOCHEMISTRY
出版日期2017
卷号136期号:3页码:311-324
关键词Biomarkers Coverage gradient Legume shrub Plant-soil feedback Shrub encroachment
ISSN号0168-2563
DOI10.1088/1748-9326/aa5ba6
文献子类Article
英文摘要Shrub encroachment frequently occurs in arid and semi-arid grasslands worldwide and affects the regional carbon balance. Many previous studies have revealed the effects of shrub encroachment on bulk carbon content of grasslands, but molecular evidence is surprisingly lacking. In this study, we examined the chemical composition of plant tissues and soil organic carbon (SOC), and soil microbial communities to identify the effects of shrub (Caragana microphylla) encroachment on SOC storage in the top layer (0-10 cm) along a gradient of natural shrub cover in the grasslands of Inner Mongolia. We found that SOC in the shrub patches was derived mainly from leaves, whereas SOC in the grassy matrix was composed of a mixture of fresh root- and leaf-derived compounds. Compared with pure grassland, the SOC decreased by 29% in the shrub-encroached grasslands (SEGs), and this decrease was enhanced by increasing shrub cover. We also found that free lipids and lignin-derived phenols increased while the ratios of omega-C-18/aC(18) and suberin/cutin decreased with increasing shrub cover. In addition, the ratios of fungal to bacterial phospholipid fatty acids (PLFAs) and gram-negative to gram-positive bacterial PLFAs decreased with increasing shrub cover. These results indicate that the encroachment of nitrogen-rich legume shrubs can lead to carbon loss by altering the chemical composition of plant inputs as well as the soil microbial community in grassland ecosystems.
学科主题Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
出版地DORDRECHT
电子版国际标准刊号1573-515X
WOS关键词WOODY PLANT ENCROACHMENT ; NORTH-AMERICAN GRASSLANDS ; MATTER ; NITROGEN ; STABILITY ; DYNAMICS ; CUTIN ; DESERTIFICATION ; PERSISTENCE ; MANAGEMENT
语种英语
WOS记录号WOS:000395741500002
出版者SPRINGER
资助机构National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31330012, 31470525] ; National Basic Research Program of China on Global ChangeNational Basic Research Program of China [2014CB954001] ; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2016M591282]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/22124]  
专题植被与环境变化国家重点实验室
作者单位1.Shanghai Ocean Univ, Coll Marine Sci, Shanghai Engn Res Ctr Hadal Sci & Technol, Shanghai 201306, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
3.Peking Univ, Minist Educ, Key Lab Earth Surface Proc, Beijing 100871, Peoples R China
4.Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Luhong,Li, He,Shen, Haihua,et al. Shrub-encroachment induced alterations in input chemistry and soil microbial community affect topsoil organic carbon in an Inner Mongolian grassland[J]. BIOGEOCHEMISTRY,2017,136(3):311-324.
APA Zhou, Luhong.,Li, He.,Shen, Haihua.,Xu, Yunping.,Wang, Yinghui.,...&Fang, Jingyun.(2017).Shrub-encroachment induced alterations in input chemistry and soil microbial community affect topsoil organic carbon in an Inner Mongolian grassland.BIOGEOCHEMISTRY,136(3),311-324.
MLA Zhou, Luhong,et al."Shrub-encroachment induced alterations in input chemistry and soil microbial community affect topsoil organic carbon in an Inner Mongolian grassland".BIOGEOCHEMISTRY 136.3(2017):311-324.

入库方式： OAI收割

来源：植物研究所

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