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Spatial distribution of microbial community composition along a steep slope plot of the Loess Plateau
Qiqi Sun1,2; Yaxian Hu2,3; Rui Wang3; Shengli Guo1,2; Lunguang Yao4; Pengfei Duan4; Guo, SL; Yao, LG (reprint author), Inst Soil & Water Conservat, Xinong Rd 26, Yangling 712100, Shaanxi, Peoples R China.
SubtypeArticle
2018
Source PublicationAPPLIED SOIL ECOLOGY
ISSN0929-1393
description.correspondentemailslguo@ms.iswc.ac.cn
Volume130Pages:226-236
AbstractSpatial heterogeneity of soil microbes introduces great uncertainty to our understanding of microbe-mediated soil carbon cycling, yet was few studied on sloping lands. Along a steep-slope grassland (35 degrees) on the Chinese Loess Plateau, soils of 0-10 cm were sampled in 2016 at three slope positions (upper, middle and bottom) to determine microbial community composition (by Illumina Hiseq sequencing) and function (enzymes involved in carbon cycling, the in situ soil respiration and temperature sensitivity). The bacterial alpha-diversity were greater at middle- and bottom- than at upper slope position, while fungal alpha-diversity varied little across slope positions. The bacterial phylum Proteobacteria was 9.7% and 19.4% lower but Acidobacteria was 36.5% and 41.3% greater at bottom- than at upper- and middle- slope positions. The fungal community transitioned from being Basidiomycota-dominant (relative abundance of 46.8%) at upper slope position to Zygomycota-dominant (relative abundance of 36.5%) at bottom slope position. The beta-D-glucosidase activity generally declined down the slope while beta-D-xylosidase and cellobiohydrolase activities hiked at middle slope position. All the enzyme activities were suppressed at bottom slope position. Soil respiration increased by 49.1% (P < 0.05) while temperature sensitivity decreased by 13.2% (P < 0.05) down the slope. Both bacterial richness (OTU) and diversity (Shannon diversity index) positively correlated with soil respiration. The copiotrophic groups (Acidobacteria and Zygomycota) negatively and oligotrophic groups (Proteobacteria and Basidiomycota) positively correlated with temperature sensitivity of soil respiration. Our findings revealed divergent responses of soil bacterial and fungal communities along the slope and highlighted the importance of microbial information in predicting the spatial variability of soil respiration in hillslope ecosystems.
KeywordSlope Positions Spatial Variation Microbial Community Enzyme Activity Soil Respiration
Subject AreaAgriculture
DOI10.1016/j.apsoil.2018.06.018
Indexed BySCI
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language英语
WOS IDWOS:000441138300027
PublisherELSEVIER SCIENCE BV
Funding OrganizationNatural Science Foundation of China [41371279, 41301322] ; Natural Science Foundation of China [41371279, 41301322] ; Chinese Universities Scientific Fund [2014YB055] ; Chinese Universities Scientific Fund [2014YB055] ; Scientific research and service platform fund of Henan Province [2016151] ; Scientific research and service platform fund of Henan Province [2016151] ; fund of scientific and technological innovation team of water ecological security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province ; fund of scientific and technological innovation team of water ecological security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province
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Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8189
Collection水保所科研产出--SCI_2018--SCI
Corresponding AuthorGuo, SL; Yao, LG (reprint author), Inst Soil & Water Conservat, Xinong Rd 26, Yangling 712100, Shaanxi, Peoples R China.
Affiliation1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci & Minist Water Resources, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
3.Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
4.Nanyang Normal Univ, Collaborat Innovat Ctr Water Secur Water Source R, South North Divers Project Henan Prov, Nanyang 473000, Henan, Peoples R China
Recommended Citation
GB/T 7714
Qiqi Sun,Yaxian Hu,Rui Wang,et al. Spatial distribution of microbial community composition along a steep slope plot of the Loess Plateau[J]. APPLIED SOIL ECOLOGY,2018,130:226-236.
APA Qiqi Sun.,Yaxian Hu.,Rui Wang.,Shengli Guo.,Lunguang Yao.,...&Yao, LG .(2018).Spatial distribution of microbial community composition along a steep slope plot of the Loess Plateau.APPLIED SOIL ECOLOGY,130,226-236.
MLA Qiqi Sun,et al."Spatial distribution of microbial community composition along a steep slope plot of the Loess Plateau".APPLIED SOIL ECOLOGY 130(2018):226-236.
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