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Biological soil crusts decrease erodibility by modifying inherent soil properties on the Loess Plateau, China
Gao, Liqian1,2; Bowker, Matthew A.3; Xu, Mingxiang1,2; Sun, Hui4; Tuo, Dengfeng4; Zhao, Yunge1,2; Zhao, YG (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
SubtypeArticle
2017
Source PublicationSOIL BIOLOGY & BIOCHEMISTRY
ISSN0038-0717
description.correspondentemailzyunge@ms.iswc.ac.cn
Volume105Pages:49-58
AbstractSoil erosion and subsequent land degradation contributed to societal collapse in the past and are a leading cause of desertification in arid and semi-arid regions. Biological soil crusts (biocrusts) are ubiquitous living covers in many arid and semiarid ecosystems that have an important role in soil stabilization and erosion prevention. The "Grain for Green" ecological project improved vegetation recovery, and led to an extensive development of biocrusts across the Loess Plateau region in China, one of the most eroded regions in the world. The expansion of biocrusts was instrumental in reducing soil loss in a very large, severely eroded region of the Loess Plateau. We hypothesized that development of biocrusts would change soil organic matter (SOM) and soil particle size distribution (PSD), thereby reducing soil erodibility and soil loss. We sampled 56 sites that were passively revegetated grasslands on former croplands and 3 bare soil sites in the Loess Plateau region, and used the erosion productivity impact calculator (EPIC) model combined with simulated rainfall to test our assumption. The PSD and SOM content varied significantly among biocrust types and successional stages. The SOM content was 4 times higher in moss dominated biocrust and 1.5 times greater in cyanobacterially dominated biocrust than bare soil. More fine-particles (< 0.01 mm) and fewer coarse-particles (0.05-0.25 mm) were present in biocrusts than in bare soil. Modeled soil erodibility decreased significantly as biocrust biomass increased, mainly due to increase in SOM content, reducing the predicted soil loss by up to 90%. Finally, the prevalence of moss biocrust was a better predictor of soil erodibility than cyanobacteria in the Loess Plateau region. We conclude that biocrusts were a decisive factor for the initial reduction of soil erosion, which must be considered explicitly in models that aim to predict and manage soil loss on the Loess Plateau. (C) 2016 Elsevier Ltd. All rights reserved.
KeywordMoss Cyanobacteria Soil Erosion k Value Soil Organic Matter Soil Texture
Subject AreaAgriculture
DOI10.1016/j.soilbio.2016.11.009
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Indexed BySCI
Publication PlaceOXFORD
Language英语
WOS IDWOS:000392788600008
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Funding OrganizationNational Natural Science Foundation of China [41571268, 41271298]; "Western Light" Project of the Chinese Academy of Sciences ; National Natural Science Foundation of China [41571268, 41271298]; "Western Light" Project of the Chinese Academy of Sciences
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8044
Collection水保所科研产出--SCI_2017--SCI
Corresponding AuthorZhao, YG (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
Affiliation1.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess, Yangling 712100, Shaanxi, Peoples R China
2.Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China
3.No Arizona Univ, Sch Forestry, 200 East Pine Knoll Dr, Flagstaff, AZ 86011 USA
4.Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Gao, Liqian,Bowker, Matthew A.,Xu, Mingxiang,et al. Biological soil crusts decrease erodibility by modifying inherent soil properties on the Loess Plateau, China[J]. SOIL BIOLOGY & BIOCHEMISTRY,2017,105:49-58.
APA Gao, Liqian.,Bowker, Matthew A..,Xu, Mingxiang.,Sun, Hui.,Tuo, Dengfeng.,...&Zhao, YG .(2017).Biological soil crusts decrease erodibility by modifying inherent soil properties on the Loess Plateau, China.SOIL BIOLOGY & BIOCHEMISTRY,105,49-58.
MLA Gao, Liqian,et al."Biological soil crusts decrease erodibility by modifying inherent soil properties on the Loess Plateau, China".SOIL BIOLOGY & BIOCHEMISTRY 105(2017):49-58.
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